/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/array-int-symm.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-a47a088281b0b97d17910950432b7c5b5bc3adeb-a47a088 [2021-07-13 19:27:49,309 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-07-13 19:27:49,311 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-07-13 19:27:49,331 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-07-13 19:27:49,359 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-07-13 19:27:49,391 INFO L113 SettingsManager]: Loading preferences was successful [2021-07-13 19:27:49,392 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-07-13 19:27:49,392 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-07-13 19:27:49,392 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-07-13 19:27:49,393 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-07-13 19:27:49,393 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-07-13 19:27:49,393 INFO L138 SettingsManager]: * Use SBE=true [2021-07-13 19:27:49,393 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-07-13 19:27:49,393 INFO L138 SettingsManager]: * sizeof long=4 [2021-07-13 19:27:49,393 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-07-13 19:27:49,394 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-07-13 19:27:49,394 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-07-13 19:27:49,394 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-07-13 19:27:49,394 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-07-13 19:27:49,394 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-07-13 19:27:49,394 INFO L138 SettingsManager]: * sizeof long double=12 [2021-07-13 19:27:49,394 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-07-13 19:27:49,394 INFO L138 SettingsManager]: * Use constant arrays=true [2021-07-13 19:27:49,394 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-07-13 19:27:49,394 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-07-13 19:27:49,395 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-07-13 19:27:49,395 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-07-13 19:27:49,395 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-07-13 19:27:49,395 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-13 19:27:49,395 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-07-13 19:27:49,395 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-07-13 19:27:49,395 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-07-13 19:27:49,395 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-07-13 19:27:49,395 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-07-13 19:27:49,396 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-07-13 19:27:49,396 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-07-13 19:27:49,396 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-07-13 19:27:49,601 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-07-13 19:27:49,619 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-07-13 19:27:49,621 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-07-13 19:27:49,622 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-07-13 19:27:49,623 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-07-13 19:27:49,624 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/array-int-symm.wvr.bpl [2021-07-13 19:27:49,624 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/array-int-symm.wvr.bpl' [2021-07-13 19:27:49,672 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-07-13 19:27:49,673 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-07-13 19:27:49,675 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-07-13 19:27:49,675 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-07-13 19:27:49,675 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-07-13 19:27:49,684 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "array-int-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:27:49" (1/1) ... [2021-07-13 19:27:49,690 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "array-int-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:27:49" (1/1) ... [2021-07-13 19:27:49,699 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-07-13 19:27:49,700 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-07-13 19:27:49,701 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-07-13 19:27:49,701 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-07-13 19:27:49,706 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "array-int-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:27:49" (1/1) ... [2021-07-13 19:27:49,707 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "array-int-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:27:49" (1/1) ... [2021-07-13 19:27:49,713 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "array-int-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:27:49" (1/1) ... [2021-07-13 19:27:49,716 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "array-int-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:27:49" (1/1) ... [2021-07-13 19:27:49,722 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "array-int-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:27:49" (1/1) ... [2021-07-13 19:27:49,724 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "array-int-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:27:49" (1/1) ... [2021-07-13 19:27:49,725 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "array-int-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:27:49" (1/1) ... [2021-07-13 19:27:49,729 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-07-13 19:27:49,730 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-07-13 19:27:49,731 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-07-13 19:27:49,731 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-07-13 19:27:49,732 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "array-int-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:27:49" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-13 19:27:49,788 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-07-13 19:27:49,788 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-07-13 19:27:49,789 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-07-13 19:27:49,789 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-07-13 19:27:49,789 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-07-13 19:27:49,789 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-07-13 19:27:49,789 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-07-13 19:27:49,789 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-07-13 19:27:49,789 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-07-13 19:27:49,790 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-07-13 19:27:50,015 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-07-13 19:27:50,016 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-07-13 19:27:50,016 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread1EXIT is neither atomic block end nor error location. [2021-07-13 19:27:50,017 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread2EXIT is neither atomic block end nor error location. [2021-07-13 19:27:50,018 INFO L202 PluginConnector]: Adding new model array-int-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 07:27:50 BoogieIcfgContainer [2021-07-13 19:27:50,018 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-07-13 19:27:50,019 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-07-13 19:27:50,019 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-07-13 19:27:50,025 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-07-13 19:27:50,025 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "array-int-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:27:49" (1/2) ... [2021-07-13 19:27:50,026 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79e4c9f7 and model type array-int-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 07:27:50, skipping insertion in model container [2021-07-13 19:27:50,026 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "array-int-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 07:27:50" (2/2) ... [2021-07-13 19:27:50,027 INFO L111 eAbstractionObserver]: Analyzing ICFG array-int-symm.wvr.bpl [2021-07-13 19:27:50,030 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-07-13 19:27:50,030 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-07-13 19:27:50,031 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-07-13 19:27:50,031 INFO L474 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-07-13 19:27:50,054 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-07-13 19:27:50,077 INFO L255 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-07-13 19:27:50,089 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-07-13 19:27:50,089 INFO L379 AbstractCegarLoop]: Hoare is false [2021-07-13 19:27:50,089 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-07-13 19:27:50,090 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-07-13 19:27:50,090 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-07-13 19:27:50,090 INFO L383 AbstractCegarLoop]: Difference is false [2021-07-13 19:27:50,090 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-07-13 19:27:50,090 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-07-13 19:27:50,104 INFO L110 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 21 places, 16 transitions, 48 flow [2021-07-13 19:27:50,112 INFO L132 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 19 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:27:50,113 INFO L276 IsEmpty]: Start isEmpty. Operand has 19 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:27:50,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-07-13 19:27:50,117 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:27:50,118 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:27:50,118 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:27:50,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:27:50,121 INFO L82 PathProgramCache]: Analyzing trace with hash -381977242, now seen corresponding path program 1 times [2021-07-13 19:27:50,126 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:27:50,127 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992610824] [2021-07-13 19:27:50,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:27:50,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:27:50,345 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:27:50,345 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:27:50,345 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992610824] [2021-07-13 19:27:50,346 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [992610824] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:27:50,346 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:27:50,346 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-07-13 19:27:50,347 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387923556] [2021-07-13 19:27:50,349 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-13 19:27:50,350 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:27:50,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-13 19:27:50,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-13 19:27:50,362 INFO L87 Difference]: Start difference. First operand has 19 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:27:50,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:27:50,422 INFO L93 Difference]: Finished difference Result 40 states and 72 transitions. [2021-07-13 19:27:50,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-07-13 19:27:50,424 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-07-13 19:27:50,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:27:50,434 INFO L225 Difference]: With dead ends: 40 [2021-07-13 19:27:50,434 INFO L226 Difference]: Without dead ends: 37 [2021-07-13 19:27:50,438 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 53.5ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-13 19:27:50,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-07-13 19:27:50,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 28. [2021-07-13 19:27:50,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 27 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:27:50,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 52 transitions. [2021-07-13 19:27:50,465 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 52 transitions. Word has length 10 [2021-07-13 19:27:50,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:27:50,465 INFO L482 AbstractCegarLoop]: Abstraction has 28 states and 52 transitions. [2021-07-13 19:27:50,465 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:27:50,466 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 52 transitions. [2021-07-13 19:27:50,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-07-13 19:27:50,466 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:27:50,466 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:27:50,467 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-07-13 19:27:50,467 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:27:50,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:27:50,471 INFO L82 PathProgramCache]: Analyzing trace with hash -481455702, now seen corresponding path program 2 times [2021-07-13 19:27:50,471 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:27:50,472 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445015789] [2021-07-13 19:27:50,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:27:50,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:27:50,544 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:27:50,545 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:27:50,545 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445015789] [2021-07-13 19:27:50,546 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1445015789] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:27:50,546 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:27:50,546 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-07-13 19:27:50,546 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561639307] [2021-07-13 19:27:50,547 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-13 19:27:50,548 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:27:50,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-13 19:27:50,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-13 19:27:50,551 INFO L87 Difference]: Start difference. First operand 28 states and 52 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:27:50,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:27:50,609 INFO L93 Difference]: Finished difference Result 46 states and 84 transitions. [2021-07-13 19:27:50,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-07-13 19:27:50,609 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-07-13 19:27:50,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:27:50,610 INFO L225 Difference]: With dead ends: 46 [2021-07-13 19:27:50,610 INFO L226 Difference]: Without dead ends: 43 [2021-07-13 19:27:50,611 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 21.2ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-13 19:27:50,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-07-13 19:27:50,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 30. [2021-07-13 19:27:50,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 29 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:27:50,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 56 transitions. [2021-07-13 19:27:50,620 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 56 transitions. Word has length 10 [2021-07-13 19:27:50,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:27:50,621 INFO L482 AbstractCegarLoop]: Abstraction has 30 states and 56 transitions. [2021-07-13 19:27:50,621 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:27:50,621 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 56 transitions. [2021-07-13 19:27:50,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-07-13 19:27:50,622 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:27:50,622 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:27:50,623 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-07-13 19:27:50,623 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:27:50,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:27:50,624 INFO L82 PathProgramCache]: Analyzing trace with hash 1042522380, now seen corresponding path program 1 times [2021-07-13 19:27:50,624 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:27:50,624 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231413383] [2021-07-13 19:27:50,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:27:50,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:27:50,679 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:27:50,679 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:27:50,679 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231413383] [2021-07-13 19:27:50,680 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1231413383] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:27:50,680 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:27:50,680 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-07-13 19:27:50,680 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803010498] [2021-07-13 19:27:50,681 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-13 19:27:50,681 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:27:50,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-13 19:27:50,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-07-13 19:27:50,684 INFO L87 Difference]: Start difference. First operand 30 states and 56 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:27:50,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:27:50,738 INFO L93 Difference]: Finished difference Result 41 states and 72 transitions. [2021-07-13 19:27:50,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-13 19:27:50,739 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-07-13 19:27:50,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:27:50,742 INFO L225 Difference]: With dead ends: 41 [2021-07-13 19:27:50,743 INFO L226 Difference]: Without dead ends: 36 [2021-07-13 19:27:50,745 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 35.7ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-07-13 19:27:50,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-07-13 19:27:50,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 27. [2021-07-13 19:27:50,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.9230769230769231) internal successors, (50), 26 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:27:50,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 50 transitions. [2021-07-13 19:27:50,755 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 50 transitions. Word has length 11 [2021-07-13 19:27:50,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:27:50,755 INFO L482 AbstractCegarLoop]: Abstraction has 27 states and 50 transitions. [2021-07-13 19:27:50,755 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:27:50,755 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 50 transitions. [2021-07-13 19:27:50,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-07-13 19:27:50,755 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:27:50,756 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:27:50,756 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-07-13 19:27:50,756 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:27:50,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:27:50,757 INFO L82 PathProgramCache]: Analyzing trace with hash -707752582, now seen corresponding path program 1 times [2021-07-13 19:27:50,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:27:50,757 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63190967] [2021-07-13 19:27:50,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:27:50,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:27:50,812 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:27:50,812 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:27:50,813 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63190967] [2021-07-13 19:27:50,813 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [63190967] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:27:50,813 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [662976915] [2021-07-13 19:27:50,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:27:50,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:27:50,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-13 19:27:50,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:27:50,962 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:27:50,963 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [662976915] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:27:50,964 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:27:50,964 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-07-13 19:27:50,964 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553776973] [2021-07-13 19:27:50,964 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-13 19:27:50,964 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:27:50,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-13 19:27:50,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-07-13 19:27:50,965 INFO L87 Difference]: Start difference. First operand 27 states and 50 transitions. Second operand has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:27:51,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:27:51,015 INFO L93 Difference]: Finished difference Result 39 states and 71 transitions. [2021-07-13 19:27:51,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-13 19:27:51,015 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-07-13 19:27:51,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:27:51,018 INFO L225 Difference]: With dead ends: 39 [2021-07-13 19:27:51,018 INFO L226 Difference]: Without dead ends: 39 [2021-07-13 19:27:51,019 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 46.8ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-07-13 19:27:51,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-07-13 19:27:51,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 28. [2021-07-13 19:27:51,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.962962962962963) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:27:51,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 53 transitions. [2021-07-13 19:27:51,029 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 53 transitions. Word has length 11 [2021-07-13 19:27:51,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:27:51,029 INFO L482 AbstractCegarLoop]: Abstraction has 28 states and 53 transitions. [2021-07-13 19:27:51,029 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:27:51,029 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 53 transitions. [2021-07-13 19:27:51,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-07-13 19:27:51,030 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:27:51,030 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:27:51,234 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:27:51,234 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:27:51,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:27:51,235 INFO L82 PathProgramCache]: Analyzing trace with hash -742242342, now seen corresponding path program 2 times [2021-07-13 19:27:51,235 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:27:51,235 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256705696] [2021-07-13 19:27:51,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:27:51,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:27:51,310 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:27:51,310 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:27:51,310 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256705696] [2021-07-13 19:27:51,310 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1256705696] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:27:51,310 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [82707510] [2021-07-13 19:27:51,310 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:27:51,349 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:27:51,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:27:51,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-13 19:27:51,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:27:51,415 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:27:51,416 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [82707510] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:27:51,416 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:27:51,416 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-07-13 19:27:51,416 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600788618] [2021-07-13 19:27:51,416 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 19:27:51,416 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:27:51,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 19:27:51,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-07-13 19:27:51,418 INFO L87 Difference]: Start difference. First operand 28 states and 53 transitions. Second operand has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:27:51,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:27:51,460 INFO L93 Difference]: Finished difference Result 52 states and 92 transitions. [2021-07-13 19:27:51,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-13 19:27:51,460 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-07-13 19:27:51,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:27:51,462 INFO L225 Difference]: With dead ends: 52 [2021-07-13 19:27:51,462 INFO L226 Difference]: Without dead ends: 52 [2021-07-13 19:27:51,462 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 44.2ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-07-13 19:27:51,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-07-13 19:27:51,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 30. [2021-07-13 19:27:51,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 2.0689655172413794) internal successors, (60), 29 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:27:51,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 60 transitions. [2021-07-13 19:27:51,468 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 60 transitions. Word has length 11 [2021-07-13 19:27:51,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:27:51,470 INFO L482 AbstractCegarLoop]: Abstraction has 30 states and 60 transitions. [2021-07-13 19:27:51,470 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:27:51,470 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 60 transitions. [2021-07-13 19:27:51,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-07-13 19:27:51,471 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:27:51,471 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:27:51,680 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:27:51,681 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:27:51,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:27:51,682 INFO L82 PathProgramCache]: Analyzing trace with hash 59373886, now seen corresponding path program 2 times [2021-07-13 19:27:51,682 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:27:51,682 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227412860] [2021-07-13 19:27:51,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:27:51,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:27:51,712 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:27:51,712 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:27:51,712 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227412860] [2021-07-13 19:27:51,713 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1227412860] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:27:51,713 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:27:51,715 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-07-13 19:27:51,716 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161471833] [2021-07-13 19:27:51,716 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-13 19:27:51,716 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:27:51,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-13 19:27:51,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-07-13 19:27:51,717 INFO L87 Difference]: Start difference. First operand 30 states and 60 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:27:51,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:27:51,754 INFO L93 Difference]: Finished difference Result 42 states and 77 transitions. [2021-07-13 19:27:51,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-13 19:27:51,756 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-07-13 19:27:51,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:27:51,756 INFO L225 Difference]: With dead ends: 42 [2021-07-13 19:27:51,756 INFO L226 Difference]: Without dead ends: 41 [2021-07-13 19:27:51,756 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 28.4ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-07-13 19:27:51,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-07-13 19:27:51,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 32. [2021-07-13 19:27:51,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 2.064516129032258) internal successors, (64), 31 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:27:51,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 64 transitions. [2021-07-13 19:27:51,761 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 64 transitions. Word has length 11 [2021-07-13 19:27:51,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:27:51,761 INFO L482 AbstractCegarLoop]: Abstraction has 32 states and 64 transitions. [2021-07-13 19:27:51,761 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:27:51,761 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 64 transitions. [2021-07-13 19:27:51,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-07-13 19:27:51,762 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:27:51,762 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:27:51,762 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-07-13 19:27:51,762 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:27:51,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:27:51,762 INFO L82 PathProgramCache]: Analyzing trace with hash 865278844, now seen corresponding path program 3 times [2021-07-13 19:27:51,763 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:27:51,763 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983430074] [2021-07-13 19:27:51,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:27:51,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:27:51,813 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:27:51,814 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:27:51,814 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983430074] [2021-07-13 19:27:51,814 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [983430074] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:27:51,814 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:27:51,814 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-07-13 19:27:51,814 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209948209] [2021-07-13 19:27:51,815 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-13 19:27:51,816 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:27:51,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-13 19:27:51,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-07-13 19:27:51,816 INFO L87 Difference]: Start difference. First operand 32 states and 64 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:27:51,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:27:51,853 INFO L93 Difference]: Finished difference Result 46 states and 84 transitions. [2021-07-13 19:27:51,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-13 19:27:51,853 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-07-13 19:27:51,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:27:51,854 INFO L225 Difference]: With dead ends: 46 [2021-07-13 19:27:51,854 INFO L226 Difference]: Without dead ends: 44 [2021-07-13 19:27:51,854 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 26.5ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-07-13 19:27:51,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-07-13 19:27:51,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 32. [2021-07-13 19:27:51,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 2.032258064516129) internal successors, (63), 31 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:27:51,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 63 transitions. [2021-07-13 19:27:51,860 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 63 transitions. Word has length 11 [2021-07-13 19:27:51,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:27:51,860 INFO L482 AbstractCegarLoop]: Abstraction has 32 states and 63 transitions. [2021-07-13 19:27:51,860 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:27:51,860 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 63 transitions. [2021-07-13 19:27:51,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-07-13 19:27:51,861 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:27:51,861 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:27:51,861 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-07-13 19:27:51,861 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:27:51,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:27:51,861 INFO L82 PathProgramCache]: Analyzing trace with hash 1777717592, now seen corresponding path program 3 times [2021-07-13 19:27:51,862 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:27:51,862 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057031967] [2021-07-13 19:27:51,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:27:51,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:27:51,896 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:27:51,897 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:27:51,897 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057031967] [2021-07-13 19:27:51,897 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1057031967] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:27:51,897 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:27:51,897 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-07-13 19:27:51,897 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473137989] [2021-07-13 19:27:51,897 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-13 19:27:51,897 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:27:51,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-13 19:27:51,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-07-13 19:27:51,898 INFO L87 Difference]: Start difference. First operand 32 states and 63 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:27:51,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:27:51,940 INFO L93 Difference]: Finished difference Result 38 states and 73 transitions. [2021-07-13 19:27:51,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-13 19:27:51,940 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-07-13 19:27:51,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:27:51,940 INFO L225 Difference]: With dead ends: 38 [2021-07-13 19:27:51,940 INFO L226 Difference]: Without dead ends: 38 [2021-07-13 19:27:51,941 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 29.8ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-07-13 19:27:51,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-07-13 19:27:51,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 30. [2021-07-13 19:27:51,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 2.0) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:27:51,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 58 transitions. [2021-07-13 19:27:51,946 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 58 transitions. Word has length 11 [2021-07-13 19:27:51,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:27:51,946 INFO L482 AbstractCegarLoop]: Abstraction has 30 states and 58 transitions. [2021-07-13 19:27:51,946 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:27:51,947 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 58 transitions. [2021-07-13 19:27:51,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-07-13 19:27:51,948 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:27:51,948 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:27:51,948 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-07-13 19:27:51,948 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:27:51,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:27:51,949 INFO L82 PathProgramCache]: Analyzing trace with hash 617529826, now seen corresponding path program 4 times [2021-07-13 19:27:51,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:27:51,949 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249765984] [2021-07-13 19:27:51,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:27:51,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:27:51,991 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:27:51,991 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:27:51,991 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249765984] [2021-07-13 19:27:51,992 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [249765984] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:27:51,992 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1759129471] [2021-07-13 19:27:51,992 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:27:52,034 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:27:52,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:27:52,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-13 19:27:52,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:27:52,081 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:27:52,081 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1759129471] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:27:52,081 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:27:52,081 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-07-13 19:27:52,081 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563996589] [2021-07-13 19:27:52,081 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-13 19:27:52,081 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:27:52,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-13 19:27:52,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-07-13 19:27:52,082 INFO L87 Difference]: Start difference. First operand 30 states and 58 transitions. Second operand has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:27:52,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:27:52,117 INFO L93 Difference]: Finished difference Result 42 states and 78 transitions. [2021-07-13 19:27:52,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-13 19:27:52,120 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-07-13 19:27:52,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:27:52,121 INFO L225 Difference]: With dead ends: 42 [2021-07-13 19:27:52,121 INFO L226 Difference]: Without dead ends: 42 [2021-07-13 19:27:52,121 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 33.6ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-07-13 19:27:52,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-07-13 19:27:52,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 29. [2021-07-13 19:27:52,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 2.0357142857142856) internal successors, (57), 28 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:27:52,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 57 transitions. [2021-07-13 19:27:52,123 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 57 transitions. Word has length 11 [2021-07-13 19:27:52,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:27:52,123 INFO L482 AbstractCegarLoop]: Abstraction has 29 states and 57 transitions. [2021-07-13 19:27:52,123 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:27:52,123 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 57 transitions. [2021-07-13 19:27:52,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-07-13 19:27:52,123 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:27:52,123 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:27:52,344 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:27:52,344 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:27:52,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:27:52,344 INFO L82 PathProgramCache]: Analyzing trace with hash -2019919942, now seen corresponding path program 4 times [2021-07-13 19:27:52,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:27:52,345 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880102699] [2021-07-13 19:27:52,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:27:52,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:27:52,374 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:27:52,374 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:27:52,374 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880102699] [2021-07-13 19:27:52,374 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1880102699] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:27:52,374 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:27:52,374 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-07-13 19:27:52,374 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62409528] [2021-07-13 19:27:52,375 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-13 19:27:52,375 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:27:52,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-13 19:27:52,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-07-13 19:27:52,375 INFO L87 Difference]: Start difference. First operand 29 states and 57 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:27:52,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:27:52,430 INFO L93 Difference]: Finished difference Result 41 states and 74 transitions. [2021-07-13 19:27:52,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-13 19:27:52,430 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-07-13 19:27:52,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:27:52,430 INFO L225 Difference]: With dead ends: 41 [2021-07-13 19:27:52,430 INFO L226 Difference]: Without dead ends: 39 [2021-07-13 19:27:52,431 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 35.4ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-07-13 19:27:52,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-07-13 19:27:52,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 29. [2021-07-13 19:27:52,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 2.0) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:27:52,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 56 transitions. [2021-07-13 19:27:52,435 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 56 transitions. Word has length 11 [2021-07-13 19:27:52,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:27:52,435 INFO L482 AbstractCegarLoop]: Abstraction has 29 states and 56 transitions. [2021-07-13 19:27:52,435 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:27:52,435 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 56 transitions. [2021-07-13 19:27:52,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-07-13 19:27:52,436 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:27:52,436 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:27:52,436 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-07-13 19:27:52,436 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:27:52,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:27:52,436 INFO L82 PathProgramCache]: Analyzing trace with hash 1491865152, now seen corresponding path program 5 times [2021-07-13 19:27:52,436 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:27:52,436 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290043536] [2021-07-13 19:27:52,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:27:52,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:27:52,513 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:27:52,513 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:27:52,513 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290043536] [2021-07-13 19:27:52,513 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [290043536] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:27:52,513 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [437335790] [2021-07-13 19:27:52,513 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:27:52,540 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:27:52,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:27:52,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-13 19:27:52,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:27:52,578 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:27:52,579 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [437335790] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:27:52,579 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:27:52,579 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-07-13 19:27:52,579 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387983376] [2021-07-13 19:27:52,579 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 19:27:52,579 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:27:52,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 19:27:52,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-07-13 19:27:52,580 INFO L87 Difference]: Start difference. First operand 29 states and 56 transitions. Second operand has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:27:52,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:27:52,609 INFO L93 Difference]: Finished difference Result 44 states and 80 transitions. [2021-07-13 19:27:52,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-13 19:27:52,609 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-07-13 19:27:52,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:27:52,609 INFO L225 Difference]: With dead ends: 44 [2021-07-13 19:27:52,610 INFO L226 Difference]: Without dead ends: 44 [2021-07-13 19:27:52,610 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 55.8ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-07-13 19:27:52,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-07-13 19:27:52,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 29. [2021-07-13 19:27:52,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 2.0) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:27:52,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 56 transitions. [2021-07-13 19:27:52,611 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 56 transitions. Word has length 11 [2021-07-13 19:27:52,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:27:52,611 INFO L482 AbstractCegarLoop]: Abstraction has 29 states and 56 transitions. [2021-07-13 19:27:52,611 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:27:52,611 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 56 transitions. [2021-07-13 19:27:52,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-07-13 19:27:52,612 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:27:52,612 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:27:52,820 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:27:52,821 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:27:52,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:27:52,821 INFO L82 PathProgramCache]: Analyzing trace with hash -2001485916, now seen corresponding path program 5 times [2021-07-13 19:27:52,822 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:27:52,822 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729455091] [2021-07-13 19:27:52,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:27:52,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:27:52,846 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:27:52,846 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:27:52,846 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729455091] [2021-07-13 19:27:52,847 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729455091] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:27:52,847 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:27:52,847 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-07-13 19:27:52,849 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378136416] [2021-07-13 19:27:52,849 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-13 19:27:52,849 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:27:52,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-13 19:27:52,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-07-13 19:27:52,850 INFO L87 Difference]: Start difference. First operand 29 states and 56 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:27:52,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:27:52,881 INFO L93 Difference]: Finished difference Result 41 states and 73 transitions. [2021-07-13 19:27:52,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-13 19:27:52,881 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-07-13 19:27:52,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:27:52,882 INFO L225 Difference]: With dead ends: 41 [2021-07-13 19:27:52,882 INFO L226 Difference]: Without dead ends: 40 [2021-07-13 19:27:52,882 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 23.0ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-07-13 19:27:52,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-07-13 19:27:52,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 31. [2021-07-13 19:27:52,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 2.0) internal successors, (60), 30 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:27:52,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 60 transitions. [2021-07-13 19:27:52,884 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 60 transitions. Word has length 11 [2021-07-13 19:27:52,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:27:52,884 INFO L482 AbstractCegarLoop]: Abstraction has 31 states and 60 transitions. [2021-07-13 19:27:52,884 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:27:52,884 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 60 transitions. [2021-07-13 19:27:52,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-07-13 19:27:52,884 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:27:52,885 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:27:52,885 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-07-13 19:27:52,885 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:27:52,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:27:52,885 INFO L82 PathProgramCache]: Analyzing trace with hash -1195580958, now seen corresponding path program 6 times [2021-07-13 19:27:52,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:27:52,885 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193438148] [2021-07-13 19:27:52,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:27:52,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:27:52,910 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:27:52,911 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:27:52,911 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193438148] [2021-07-13 19:27:52,911 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [193438148] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:27:52,911 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:27:52,911 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-07-13 19:27:52,911 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858116438] [2021-07-13 19:27:52,911 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-13 19:27:52,911 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:27:52,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-13 19:27:52,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-07-13 19:27:52,912 INFO L87 Difference]: Start difference. First operand 31 states and 60 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:27:52,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:27:52,950 INFO L93 Difference]: Finished difference Result 35 states and 65 transitions. [2021-07-13 19:27:52,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-13 19:27:52,952 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-07-13 19:27:52,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:27:52,954 INFO L225 Difference]: With dead ends: 35 [2021-07-13 19:27:52,954 INFO L226 Difference]: Without dead ends: 33 [2021-07-13 19:27:52,954 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 26.9ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-07-13 19:27:52,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-07-13 19:27:52,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 31. [2021-07-13 19:27:52,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.9666666666666666) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:27:52,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 59 transitions. [2021-07-13 19:27:52,965 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 59 transitions. Word has length 11 [2021-07-13 19:27:52,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:27:52,965 INFO L482 AbstractCegarLoop]: Abstraction has 31 states and 59 transitions. [2021-07-13 19:27:52,965 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:27:52,965 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 59 transitions. [2021-07-13 19:27:52,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-07-13 19:27:52,966 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:27:52,966 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:27:52,966 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-07-13 19:27:52,966 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:27:52,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:27:52,966 INFO L82 PathProgramCache]: Analyzing trace with hash -283142210, now seen corresponding path program 6 times [2021-07-13 19:27:52,966 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:27:52,966 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725411520] [2021-07-13 19:27:52,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:27:52,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:27:52,989 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:27:52,989 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:27:52,989 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725411520] [2021-07-13 19:27:52,989 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725411520] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:27:52,989 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:27:52,989 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-07-13 19:27:52,989 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620316581] [2021-07-13 19:27:52,989 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-13 19:27:52,989 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:27:52,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-13 19:27:52,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-07-13 19:27:52,990 INFO L87 Difference]: Start difference. First operand 31 states and 59 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:27:53,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:27:53,029 INFO L93 Difference]: Finished difference Result 32 states and 60 transitions. [2021-07-13 19:27:53,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-13 19:27:53,030 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-07-13 19:27:53,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:27:53,030 INFO L225 Difference]: With dead ends: 32 [2021-07-13 19:27:53,030 INFO L226 Difference]: Without dead ends: 32 [2021-07-13 19:27:53,030 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 28.7ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-07-13 19:27:53,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-07-13 19:27:53,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 28. [2021-07-13 19:27:53,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 27 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:27:53,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 52 transitions. [2021-07-13 19:27:53,031 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 52 transitions. Word has length 11 [2021-07-13 19:27:53,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:27:53,032 INFO L482 AbstractCegarLoop]: Abstraction has 28 states and 52 transitions. [2021-07-13 19:27:53,032 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:27:53,032 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 52 transitions. [2021-07-13 19:27:53,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-07-13 19:27:53,032 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:27:53,032 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:27:53,032 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-07-13 19:27:53,032 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:27:53,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:27:53,033 INFO L82 PathProgramCache]: Analyzing trace with hash -466578568, now seen corresponding path program 1 times [2021-07-13 19:27:53,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:27:53,033 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686872201] [2021-07-13 19:27:53,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:27:53,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:27:53,290 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:27:53,290 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:27:53,290 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686872201] [2021-07-13 19:27:53,290 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1686872201] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:27:53,290 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1402248459] [2021-07-13 19:27:53,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:27:53,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:27:53,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-13 19:27:53,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:27:53,621 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:27:53,621 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:27:53,631 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-13 19:27:53,633 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:27:53,636 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:27:53,637 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:27:53,638 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:27:53,689 INFO L628 ElimStorePlain]: treesize reduction 62, result has 44.1 percent of original size [2021-07-13 19:27:53,689 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:27:53,691 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:27:53,692 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-13 19:27:53,696 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:27:53,706 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:27:53,709 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:27:53,709 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-13 19:27:53,710 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:27:53,720 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:27:53,732 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:27:53,733 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:125, output treesize:22 [2021-07-13 19:27:53,751 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:27:53,752 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1402248459] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:27:53,752 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:27:53,752 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 10 [2021-07-13 19:27:53,752 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928005081] [2021-07-13 19:27:53,752 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:27:53,752 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:27:53,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:27:53,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:27:53,753 INFO L87 Difference]: Start difference. First operand 28 states and 52 transitions. Second operand has 10 states, 10 states have (on average 1.8) internal successors, (18), 10 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:27:54,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:27:54,309 INFO L93 Difference]: Finished difference Result 61 states and 111 transitions. [2021-07-13 19:27:54,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:27:54,309 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 10 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-07-13 19:27:54,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:27:54,309 INFO L225 Difference]: With dead ends: 61 [2021-07-13 19:27:54,310 INFO L226 Difference]: Without dead ends: 55 [2021-07-13 19:27:54,310 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 8 SyntacticMatches, 4 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 704.5ms TimeCoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:27:54,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-07-13 19:27:54,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 37. [2021-07-13 19:27:54,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 2.0) internal successors, (72), 36 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:27:54,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 72 transitions. [2021-07-13 19:27:54,313 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 72 transitions. Word has length 12 [2021-07-13 19:27:54,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:27:54,313 INFO L482 AbstractCegarLoop]: Abstraction has 37 states and 72 transitions. [2021-07-13 19:27:54,313 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 10 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:27:54,313 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 72 transitions. [2021-07-13 19:27:54,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-07-13 19:27:54,314 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:27:54,314 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:27:54,520 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-07-13 19:27:54,521 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:27:54,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:27:54,521 INFO L82 PathProgramCache]: Analyzing trace with hash -1514371190, now seen corresponding path program 2 times [2021-07-13 19:27:54,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:27:54,521 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598749405] [2021-07-13 19:27:54,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:27:54,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:27:54,772 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:27:54,772 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:27:54,772 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598749405] [2021-07-13 19:27:54,772 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [598749405] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:27:54,772 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1255533953] [2021-07-13 19:27:54,773 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:27:54,797 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:27:54,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:27:54,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-13 19:27:54,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:27:54,970 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:27:54,971 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:27:54,972 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-13 19:27:54,974 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:27:54,978 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:27:54,978 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:27:54,979 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:27:54,999 INFO L628 ElimStorePlain]: treesize reduction 104, result has 12.6 percent of original size [2021-07-13 19:27:54,999 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:27:55,000 INFO L518 ElimStorePlain]: Eliminatee v_prenex_6 vanished before elimination [2021-07-13 19:27:55,000 INFO L518 ElimStorePlain]: Eliminatee v_prenex_7 vanished before elimination [2021-07-13 19:27:55,003 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 4 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:27:55,003 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 5 variables, input treesize:133, output treesize:11 [2021-07-13 19:27:55,028 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:27:55,028 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1255533953] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:27:55,028 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:27:55,028 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 11 [2021-07-13 19:27:55,029 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036229756] [2021-07-13 19:27:55,029 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:27:55,029 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:27:55,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:27:55,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:27:55,029 INFO L87 Difference]: Start difference. First operand 37 states and 72 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:27:55,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:27:55,298 INFO L93 Difference]: Finished difference Result 48 states and 92 transitions. [2021-07-13 19:27:55,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 19:27:55,298 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-07-13 19:27:55,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:27:55,299 INFO L225 Difference]: With dead ends: 48 [2021-07-13 19:27:55,299 INFO L226 Difference]: Without dead ends: 45 [2021-07-13 19:27:55,299 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 394.6ms TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:27:55,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-07-13 19:27:55,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 40. [2021-07-13 19:27:55,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 2.0) internal successors, (78), 39 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:27:55,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 78 transitions. [2021-07-13 19:27:55,301 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 78 transitions. Word has length 12 [2021-07-13 19:27:55,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:27:55,301 INFO L482 AbstractCegarLoop]: Abstraction has 40 states and 78 transitions. [2021-07-13 19:27:55,301 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:27:55,301 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 78 transitions. [2021-07-13 19:27:55,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-07-13 19:27:55,301 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:27:55,301 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:27:55,502 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:27:55,502 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:27:55,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:27:55,503 INFO L82 PathProgramCache]: Analyzing trace with hash -1506640792, now seen corresponding path program 3 times [2021-07-13 19:27:55,503 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:27:55,503 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522129529] [2021-07-13 19:27:55,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:27:55,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:27:55,702 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:27:55,702 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:27:55,702 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522129529] [2021-07-13 19:27:55,702 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [522129529] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:27:55,702 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [220019312] [2021-07-13 19:27:55,702 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:27:55,728 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:27:55,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:27:55,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:27:55,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:27:55,851 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:27:55,852 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:27:55,852 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:27:55,853 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:27:55,856 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:27:55,857 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:27:55,857 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-13 19:27:55,858 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:27:55,862 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:27:55,863 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:27:55,863 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-07-13 19:27:55,866 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:27:55,869 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:27:55,870 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-13 19:27:55,872 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:27:55,932 INFO L628 ElimStorePlain]: treesize reduction 93, result has 44.0 percent of original size [2021-07-13 19:27:55,935 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:27:55,935 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-13 19:27:55,936 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:27:55,958 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:27:55,960 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:27:55,960 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 2 variables, input treesize:201, output treesize:62 [2021-07-13 19:27:56,044 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:27:56,044 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [220019312] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:27:56,045 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:27:56,045 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-07-13 19:27:56,045 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692660275] [2021-07-13 19:27:56,045 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:27:56,045 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:27:56,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:27:56,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:27:56,045 INFO L87 Difference]: Start difference. First operand 40 states and 78 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:27:56,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:27:56,212 INFO L93 Difference]: Finished difference Result 51 states and 98 transitions. [2021-07-13 19:27:56,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-07-13 19:27:56,213 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-07-13 19:27:56,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:27:56,213 INFO L225 Difference]: With dead ends: 51 [2021-07-13 19:27:56,213 INFO L226 Difference]: Without dead ends: 48 [2021-07-13 19:27:56,214 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 326.4ms TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:27:56,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-07-13 19:27:56,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 40. [2021-07-13 19:27:56,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 2.0) internal successors, (78), 39 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:27:56,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 78 transitions. [2021-07-13 19:27:56,215 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 78 transitions. Word has length 12 [2021-07-13 19:27:56,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:27:56,215 INFO L482 AbstractCegarLoop]: Abstraction has 40 states and 78 transitions. [2021-07-13 19:27:56,215 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:27:56,215 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 78 transitions. [2021-07-13 19:27:56,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-07-13 19:27:56,216 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:27:56,216 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:27:56,416 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:27:56,416 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:27:56,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:27:56,417 INFO L82 PathProgramCache]: Analyzing trace with hash 1983860354, now seen corresponding path program 4 times [2021-07-13 19:27:56,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:27:56,417 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271404625] [2021-07-13 19:27:56,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:27:56,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:27:56,564 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:27:56,564 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:27:56,564 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271404625] [2021-07-13 19:27:56,564 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [271404625] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:27:56,564 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [833644973] [2021-07-13 19:27:56,564 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:27:56,597 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:27:56,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:27:56,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-13 19:27:56,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:27:56,757 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:27:56,757 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:27:56,758 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-13 19:27:56,759 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:27:56,762 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:27:56,763 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-13 19:27:56,769 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:27:56,781 INFO L628 ElimStorePlain]: treesize reduction 79, result has 12.2 percent of original size [2021-07-13 19:27:56,781 INFO L518 ElimStorePlain]: Eliminatee v_prenex_10 vanished before elimination [2021-07-13 19:27:56,781 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:27:56,781 INFO L518 ElimStorePlain]: Eliminatee v_prenex_11 vanished before elimination [2021-07-13 19:27:56,781 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:27:56,781 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 6 variables, input treesize:107, output treesize:11 [2021-07-13 19:27:56,801 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:27:56,802 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [833644973] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:27:56,802 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:27:56,802 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 10 [2021-07-13 19:27:56,802 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678866292] [2021-07-13 19:27:56,802 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:27:56,802 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:27:56,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:27:56,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:27:56,803 INFO L87 Difference]: Start difference. First operand 40 states and 78 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:27:56,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:27:56,943 INFO L93 Difference]: Finished difference Result 64 states and 121 transitions. [2021-07-13 19:27:56,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 19:27:56,943 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-07-13 19:27:56,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:27:56,944 INFO L225 Difference]: With dead ends: 64 [2021-07-13 19:27:56,944 INFO L226 Difference]: Without dead ends: 61 [2021-07-13 19:27:56,944 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 251.0ms TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:27:56,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-07-13 19:27:56,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 42. [2021-07-13 19:27:56,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 2.0) internal successors, (82), 41 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:27:56,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 82 transitions. [2021-07-13 19:27:56,945 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 82 transitions. Word has length 12 [2021-07-13 19:27:56,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:27:56,945 INFO L482 AbstractCegarLoop]: Abstraction has 42 states and 82 transitions. [2021-07-13 19:27:56,946 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:27:56,946 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 82 transitions. [2021-07-13 19:27:56,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-07-13 19:27:56,946 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:27:56,946 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:27:57,152 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-07-13 19:27:57,153 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:27:57,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:27:57,153 INFO L82 PathProgramCache]: Analyzing trace with hash -976515612, now seen corresponding path program 5 times [2021-07-13 19:27:57,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:27:57,153 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034654713] [2021-07-13 19:27:57,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:27:57,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:27:57,427 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:27:57,427 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:27:57,427 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034654713] [2021-07-13 19:27:57,427 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2034654713] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:27:57,427 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1184870149] [2021-07-13 19:27:57,427 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:27:57,453 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:27:57,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:27:57,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-13 19:27:57,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:27:57,611 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:27:57,611 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:27:57,612 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-13 19:27:57,613 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:27:57,616 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:27:57,616 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-13 19:27:57,617 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:27:57,662 INFO L628 ElimStorePlain]: treesize reduction 58, result has 50.0 percent of original size [2021-07-13 19:27:57,674 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:27:57,675 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-13 19:27:57,676 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:27:57,689 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:27:57,691 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:27:57,692 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:27:57,703 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:27:57,703 INFO L518 ElimStorePlain]: Eliminatee v_prenex_13 vanished before elimination [2021-07-13 19:27:57,704 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:27:57,704 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:133, output treesize:22 [2021-07-13 19:27:57,744 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:27:57,745 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1184870149] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:27:57,745 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:27:57,745 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 11 [2021-07-13 19:27:57,745 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529777572] [2021-07-13 19:27:57,745 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:27:57,745 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:27:57,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:27:57,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:27:57,746 INFO L87 Difference]: Start difference. First operand 42 states and 82 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:27:58,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:27:58,064 INFO L93 Difference]: Finished difference Result 53 states and 102 transitions. [2021-07-13 19:27:58,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 19:27:58,064 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-07-13 19:27:58,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:27:58,065 INFO L225 Difference]: With dead ends: 53 [2021-07-13 19:27:58,065 INFO L226 Difference]: Without dead ends: 50 [2021-07-13 19:27:58,065 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 508.4ms TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:27:58,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-07-13 19:27:58,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 42. [2021-07-13 19:27:58,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 2.0) internal successors, (82), 41 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:27:58,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 82 transitions. [2021-07-13 19:27:58,066 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 82 transitions. Word has length 12 [2021-07-13 19:27:58,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:27:58,066 INFO L482 AbstractCegarLoop]: Abstraction has 42 states and 82 transitions. [2021-07-13 19:27:58,066 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:27:58,066 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 82 transitions. [2021-07-13 19:27:58,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-07-13 19:27:58,067 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:27:58,067 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:27:58,268 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:27:58,268 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:27:58,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:27:58,268 INFO L82 PathProgramCache]: Analyzing trace with hash -968785214, now seen corresponding path program 6 times [2021-07-13 19:27:58,268 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:27:58,268 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862947883] [2021-07-13 19:27:58,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:27:58,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:27:58,603 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:27:58,603 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:27:58,603 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862947883] [2021-07-13 19:27:58,603 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [862947883] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:27:58,604 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1117415996] [2021-07-13 19:27:58,604 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:27:58,632 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:27:58,632 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:27:58,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-13 19:27:58,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:27:58,799 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:27:58,800 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:27:58,800 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-13 19:27:58,802 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:27:58,809 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:27:58,809 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:27:58,810 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:27:58,825 INFO L628 ElimStorePlain]: treesize reduction 96, result has 13.5 percent of original size [2021-07-13 19:27:58,825 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:27:58,826 INFO L518 ElimStorePlain]: Eliminatee v_prenex_16 vanished before elimination [2021-07-13 19:27:58,826 INFO L518 ElimStorePlain]: Eliminatee v_prenex_15 vanished before elimination [2021-07-13 19:27:58,827 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 4 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:27:58,827 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 5 variables, input treesize:125, output treesize:11 [2021-07-13 19:27:58,848 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:27:58,848 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1117415996] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:27:58,848 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:27:58,848 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 10 [2021-07-13 19:27:58,848 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601300304] [2021-07-13 19:27:58,849 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:27:58,849 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:27:58,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:27:58,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:27:58,849 INFO L87 Difference]: Start difference. First operand 42 states and 82 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:27:59,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:27:59,031 INFO L93 Difference]: Finished difference Result 54 states and 104 transitions. [2021-07-13 19:27:59,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-07-13 19:27:59,032 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-07-13 19:27:59,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:27:59,032 INFO L225 Difference]: With dead ends: 54 [2021-07-13 19:27:59,032 INFO L226 Difference]: Without dead ends: 51 [2021-07-13 19:27:59,032 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 306.3ms TimeCoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:27:59,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-07-13 19:27:59,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 41. [2021-07-13 19:27:59,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 2.0) internal successors, (80), 40 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:27:59,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 80 transitions. [2021-07-13 19:27:59,034 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 80 transitions. Word has length 12 [2021-07-13 19:27:59,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:27:59,034 INFO L482 AbstractCegarLoop]: Abstraction has 41 states and 80 transitions. [2021-07-13 19:27:59,034 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:27:59,034 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 80 transitions. [2021-07-13 19:27:59,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-07-13 19:27:59,034 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:27:59,034 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:27:59,235 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:27:59,235 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:27:59,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:27:59,235 INFO L82 PathProgramCache]: Analyzing trace with hash -1580118726, now seen corresponding path program 7 times [2021-07-13 19:27:59,236 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:27:59,236 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212740711] [2021-07-13 19:27:59,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:27:59,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:27:59,280 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:27:59,281 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:27:59,281 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212740711] [2021-07-13 19:27:59,281 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [212740711] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:27:59,281 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1004970378] [2021-07-13 19:27:59,281 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:27:59,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:27:59,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-13 19:27:59,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:27:59,395 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:27:59,397 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:27:59,399 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:27:59,400 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:27:59,401 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:27:59,403 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:27:59,403 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:27:59,404 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:27:59,406 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:27:59,407 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:27:59,409 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:27:59,410 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:27:59,412 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:27:59,413 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:27:59,434 INFO L628 ElimStorePlain]: treesize reduction 26, result has 43.5 percent of original size [2021-07-13 19:27:59,435 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:27:59,435 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:27:59,435 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 2 variables, input treesize:107, output treesize:20 [2021-07-13 19:27:59,457 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:27:59,458 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1004970378] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:27:59,458 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:27:59,458 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-07-13 19:27:59,458 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970233819] [2021-07-13 19:27:59,458 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:27:59,458 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:27:59,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:27:59,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:27:59,459 INFO L87 Difference]: Start difference. First operand 41 states and 80 transitions. Second operand has 10 states, 10 states have (on average 1.8) internal successors, (18), 10 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:27:59,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:27:59,667 INFO L93 Difference]: Finished difference Result 57 states and 103 transitions. [2021-07-13 19:27:59,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:27:59,668 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 10 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-07-13 19:27:59,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:27:59,668 INFO L225 Difference]: With dead ends: 57 [2021-07-13 19:27:59,668 INFO L226 Difference]: Without dead ends: 50 [2021-07-13 19:27:59,668 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 214.5ms TimeCoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:27:59,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-07-13 19:27:59,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 38. [2021-07-13 19:27:59,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 2.0) internal successors, (74), 37 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:27:59,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 74 transitions. [2021-07-13 19:27:59,670 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 74 transitions. Word has length 13 [2021-07-13 19:27:59,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:27:59,670 INFO L482 AbstractCegarLoop]: Abstraction has 38 states and 74 transitions. [2021-07-13 19:27:59,670 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 10 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:27:59,670 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 74 transitions. [2021-07-13 19:27:59,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-07-13 19:27:59,670 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:27:59,670 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:27:59,880 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2021-07-13 19:27:59,881 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:27:59,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:27:59,881 INFO L82 PathProgramCache]: Analyzing trace with hash -4067700, now seen corresponding path program 8 times [2021-07-13 19:27:59,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:27:59,881 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486015231] [2021-07-13 19:27:59,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:27:59,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:27:59,929 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:27:59,930 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:27:59,930 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486015231] [2021-07-13 19:27:59,930 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1486015231] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:27:59,930 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [112416670] [2021-07-13 19:27:59,930 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:27:59,957 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:27:59,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:27:59,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-13 19:27:59,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:28:00,024 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:00,025 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:28:00,026 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:28:00,028 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:28:00,028 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:28:00,054 INFO L628 ElimStorePlain]: treesize reduction 27, result has 30.8 percent of original size [2021-07-13 19:28:00,055 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:28:00,055 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:28:00,055 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:53, output treesize:12 [2021-07-13 19:28:00,073 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:28:00,073 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [112416670] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:28:00,073 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:28:00,073 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-07-13 19:28:00,073 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105809457] [2021-07-13 19:28:00,074 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:28:00,074 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:28:00,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:28:00,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:28:00,074 INFO L87 Difference]: Start difference. First operand 38 states and 74 transitions. Second operand has 10 states, 10 states have (on average 1.8) internal successors, (18), 10 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:28:00,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:28:00,160 INFO L93 Difference]: Finished difference Result 56 states and 105 transitions. [2021-07-13 19:28:00,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 19:28:00,166 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 10 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-07-13 19:28:00,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:28:00,168 INFO L225 Difference]: With dead ends: 56 [2021-07-13 19:28:00,168 INFO L226 Difference]: Without dead ends: 56 [2021-07-13 19:28:00,168 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 92.5ms TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:28:00,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-07-13 19:28:00,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 39. [2021-07-13 19:28:00,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 2.026315789473684) internal successors, (77), 38 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:28:00,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 77 transitions. [2021-07-13 19:28:00,171 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 77 transitions. Word has length 13 [2021-07-13 19:28:00,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:28:00,171 INFO L482 AbstractCegarLoop]: Abstraction has 39 states and 77 transitions. [2021-07-13 19:28:00,171 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 10 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:28:00,171 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 77 transitions. [2021-07-13 19:28:00,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-07-13 19:28:00,172 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:28:00,172 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:28:00,385 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:28:00,385 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:28:00,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:28:00,385 INFO L82 PathProgramCache]: Analyzing trace with hash -1853476550, now seen corresponding path program 9 times [2021-07-13 19:28:00,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:28:00,385 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224654306] [2021-07-13 19:28:00,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:28:00,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:28:00,487 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:28:00,487 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:28:00,488 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224654306] [2021-07-13 19:28:00,488 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1224654306] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:28:00,488 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1659517384] [2021-07-13 19:28:00,488 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:28:00,514 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:28:00,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:28:00,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-13 19:28:00,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:28:00,575 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:00,575 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:00,575 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:28:00,576 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:28:00,579 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:00,579 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:00,580 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:28:00,581 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:28:00,583 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:00,583 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:00,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:28:00,587 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:28:00,589 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:00,589 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:28:00,590 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:28:00,622 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-07-13 19:28:00,622 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:28:00,623 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:28:00,623 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-07-13 19:28:00,665 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:28:00,666 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1659517384] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:28:00,666 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:28:00,666 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-07-13 19:28:00,666 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123900966] [2021-07-13 19:28:00,666 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:28:00,666 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:28:00,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:28:00,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:28:00,667 INFO L87 Difference]: Start difference. First operand 39 states and 77 transitions. Second operand has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 11 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:28:00,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:28:00,866 INFO L93 Difference]: Finished difference Result 96 states and 169 transitions. [2021-07-13 19:28:00,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:28:00,867 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 11 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-07-13 19:28:00,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:28:00,867 INFO L225 Difference]: With dead ends: 96 [2021-07-13 19:28:00,867 INFO L226 Difference]: Without dead ends: 96 [2021-07-13 19:28:00,868 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 236.0ms TimeCoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:28:00,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-07-13 19:28:00,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 43. [2021-07-13 19:28:00,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 2.1904761904761907) internal successors, (92), 42 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:28:00,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 92 transitions. [2021-07-13 19:28:00,869 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 92 transitions. Word has length 13 [2021-07-13 19:28:00,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:28:00,869 INFO L482 AbstractCegarLoop]: Abstraction has 43 states and 92 transitions. [2021-07-13 19:28:00,869 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 11 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:28:00,869 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 92 transitions. [2021-07-13 19:28:00,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-07-13 19:28:00,870 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:28:00,870 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:28:01,072 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable97 [2021-07-13 19:28:01,073 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:28:01,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:28:01,073 INFO L82 PathProgramCache]: Analyzing trace with hash -1051860322, now seen corresponding path program 10 times [2021-07-13 19:28:01,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:28:01,073 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791375928] [2021-07-13 19:28:01,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:28:01,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:28:01,126 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:28:01,126 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:28:01,126 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791375928] [2021-07-13 19:28:01,126 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [791375928] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:28:01,126 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1454662370] [2021-07-13 19:28:01,126 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:28:01,155 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:28:01,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:28:01,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-13 19:28:01,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:28:01,214 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:01,214 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:01,215 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:28:01,216 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:28:01,218 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:01,218 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:01,219 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:28:01,220 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:28:01,222 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:01,222 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:01,223 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:28:01,223 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:28:01,226 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:01,226 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:28:01,227 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:28:01,258 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-07-13 19:28:01,259 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:28:01,259 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:28:01,259 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-07-13 19:28:01,331 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:28:01,332 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1454662370] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:28:01,332 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:28:01,332 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-07-13 19:28:01,332 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058617361] [2021-07-13 19:28:01,332 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:28:01,332 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:28:01,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:28:01,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:28:01,333 INFO L87 Difference]: Start difference. First operand 43 states and 92 transitions. Second operand has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:28:01,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:28:01,839 INFO L93 Difference]: Finished difference Result 89 states and 163 transitions. [2021-07-13 19:28:01,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:28:01,840 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-07-13 19:28:01,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:28:01,841 INFO L225 Difference]: With dead ends: 89 [2021-07-13 19:28:01,841 INFO L226 Difference]: Without dead ends: 84 [2021-07-13 19:28:01,841 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 528.1ms TimeCoverageRelationStatistics Valid=110, Invalid=352, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:28:01,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-07-13 19:28:01,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 45. [2021-07-13 19:28:01,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 2.1363636363636362) internal successors, (94), 44 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:28:01,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 94 transitions. [2021-07-13 19:28:01,843 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 94 transitions. Word has length 13 [2021-07-13 19:28:01,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:28:01,843 INFO L482 AbstractCegarLoop]: Abstraction has 45 states and 94 transitions. [2021-07-13 19:28:01,843 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:28:01,843 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 94 transitions. [2021-07-13 19:28:01,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-07-13 19:28:01,844 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:28:01,844 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:28:02,052 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:28:02,052 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:28:02,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:28:02,052 INFO L82 PathProgramCache]: Analyzing trace with hash 666483384, now seen corresponding path program 11 times [2021-07-13 19:28:02,052 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:28:02,052 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681105548] [2021-07-13 19:28:02,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:28:02,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:28:02,115 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:28:02,115 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:28:02,115 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681105548] [2021-07-13 19:28:02,115 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1681105548] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:28:02,115 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [324733919] [2021-07-13 19:28:02,115 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:28:02,142 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:28:02,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:28:02,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-13 19:28:02,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:28:02,196 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:02,197 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:02,197 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:28:02,198 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:28:02,201 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:02,201 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:02,201 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:28:02,202 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:28:02,204 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:02,204 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:02,205 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:28:02,205 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:28:02,207 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:02,209 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:28:02,209 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:28:02,238 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-07-13 19:28:02,239 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:28:02,239 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:28:02,239 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-07-13 19:28:02,278 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:28:02,279 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [324733919] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:28:02,279 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:28:02,279 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-07-13 19:28:02,279 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609182490] [2021-07-13 19:28:02,279 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:28:02,279 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:28:02,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:28:02,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:28:02,280 INFO L87 Difference]: Start difference. First operand 45 states and 94 transitions. Second operand has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:28:02,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:28:02,562 INFO L93 Difference]: Finished difference Result 83 states and 156 transitions. [2021-07-13 19:28:02,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:28:02,562 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-07-13 19:28:02,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:28:02,563 INFO L225 Difference]: With dead ends: 83 [2021-07-13 19:28:02,563 INFO L226 Difference]: Without dead ends: 83 [2021-07-13 19:28:02,563 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 289.8ms TimeCoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:28:02,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-07-13 19:28:02,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 44. [2021-07-13 19:28:02,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 2.0697674418604652) internal successors, (89), 43 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:28:02,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 89 transitions. [2021-07-13 19:28:02,564 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 89 transitions. Word has length 13 [2021-07-13 19:28:02,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:28:02,564 INFO L482 AbstractCegarLoop]: Abstraction has 44 states and 89 transitions. [2021-07-13 19:28:02,564 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:28:02,565 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 89 transitions. [2021-07-13 19:28:02,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-07-13 19:28:02,565 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:28:02,565 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:28:02,780 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2021-07-13 19:28:02,780 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:28:02,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:28:02,780 INFO L82 PathProgramCache]: Analyzing trace with hash -1044129924, now seen corresponding path program 12 times [2021-07-13 19:28:02,780 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:28:02,780 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780549365] [2021-07-13 19:28:02,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:28:02,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:28:02,840 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:28:02,840 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:28:02,840 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780549365] [2021-07-13 19:28:02,840 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [780549365] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:28:02,840 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [166536366] [2021-07-13 19:28:02,840 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:28:02,864 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:28:02,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:28:02,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-13 19:28:02,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:28:02,959 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:02,960 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:02,960 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:28:02,961 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:28:02,963 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:02,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:28:02,964 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:28:02,985 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-07-13 19:28:02,985 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:28:02,986 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:28:02,986 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-07-13 19:28:03,003 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:28:03,003 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [166536366] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:28:03,003 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:28:03,003 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-07-13 19:28:03,003 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833041781] [2021-07-13 19:28:03,003 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:28:03,003 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:28:03,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:28:03,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:28:03,004 INFO L87 Difference]: Start difference. First operand 44 states and 89 transitions. Second operand has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:28:03,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:28:03,091 INFO L93 Difference]: Finished difference Result 67 states and 130 transitions. [2021-07-13 19:28:03,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 19:28:03,091 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-07-13 19:28:03,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:28:03,092 INFO L225 Difference]: With dead ends: 67 [2021-07-13 19:28:03,092 INFO L226 Difference]: Without dead ends: 67 [2021-07-13 19:28:03,092 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 98.7ms TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:28:03,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-07-13 19:28:03,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 44. [2021-07-13 19:28:03,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 2.0697674418604652) internal successors, (89), 43 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:28:03,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 89 transitions. [2021-07-13 19:28:03,093 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 89 transitions. Word has length 13 [2021-07-13 19:28:03,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:28:03,094 INFO L482 AbstractCegarLoop]: Abstraction has 44 states and 89 transitions. [2021-07-13 19:28:03,094 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:28:03,094 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 89 transitions. [2021-07-13 19:28:03,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-07-13 19:28:03,094 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:28:03,094 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:28:03,317 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:28:03,317 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:28:03,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:28:03,317 INFO L82 PathProgramCache]: Analyzing trace with hash 1239139006, now seen corresponding path program 13 times [2021-07-13 19:28:03,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:28:03,318 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011261108] [2021-07-13 19:28:03,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:28:03,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:28:03,423 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:28:03,423 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:28:03,423 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011261108] [2021-07-13 19:28:03,423 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1011261108] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:28:03,424 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [91555237] [2021-07-13 19:28:03,424 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:28:03,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:28:03,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-13 19:28:03,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:28:03,570 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:03,571 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:03,571 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:28:03,572 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:28:03,574 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:03,574 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:28:03,575 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:28:03,590 INFO L628 ElimStorePlain]: treesize reduction 30, result has 33.3 percent of original size [2021-07-13 19:28:03,590 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:28:03,591 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:28:03,591 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:59, output treesize:15 [2021-07-13 19:28:03,608 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:28:03,608 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [91555237] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:28:03,608 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:28:03,608 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-07-13 19:28:03,608 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523042565] [2021-07-13 19:28:03,608 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:28:03,608 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:28:03,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:28:03,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:28:03,609 INFO L87 Difference]: Start difference. First operand 44 states and 89 transitions. Second operand has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 11 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:28:03,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:28:03,687 INFO L93 Difference]: Finished difference Result 77 states and 149 transitions. [2021-07-13 19:28:03,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:28:03,687 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 11 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-07-13 19:28:03,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:28:03,688 INFO L225 Difference]: With dead ends: 77 [2021-07-13 19:28:03,688 INFO L226 Difference]: Without dead ends: 77 [2021-07-13 19:28:03,688 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 169.3ms TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:28:03,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-07-13 19:28:03,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 51. [2021-07-13 19:28:03,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 2.22) internal successors, (111), 50 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:28:03,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 111 transitions. [2021-07-13 19:28:03,690 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 111 transitions. Word has length 13 [2021-07-13 19:28:03,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:28:03,690 INFO L482 AbstractCegarLoop]: Abstraction has 51 states and 111 transitions. [2021-07-13 19:28:03,690 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 11 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:28:03,690 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 111 transitions. [2021-07-13 19:28:03,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-07-13 19:28:03,690 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:28:03,690 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:28:03,891 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2021-07-13 19:28:03,891 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:28:03,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:28:03,891 INFO L82 PathProgramCache]: Analyzing trace with hash 319438298, now seen corresponding path program 14 times [2021-07-13 19:28:03,891 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:28:03,891 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703729265] [2021-07-13 19:28:03,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:28:03,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:28:03,945 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:28:03,945 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:28:03,945 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703729265] [2021-07-13 19:28:03,945 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1703729265] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:28:03,950 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1690757787] [2021-07-13 19:28:03,951 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:28:03,978 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:28:03,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:28:03,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-13 19:28:03,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:28:04,064 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:04,065 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:04,065 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:28:04,066 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:28:04,068 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:28:04,070 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:28:04,071 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:28:04,072 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:28:04,074 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:04,074 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:04,075 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:28:04,075 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:28:04,077 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:28:04,078 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:28:04,079 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:28:04,080 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:28:04,105 INFO L628 ElimStorePlain]: treesize reduction 21, result has 58.0 percent of original size [2021-07-13 19:28:04,105 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:28:04,106 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:28:04,106 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 2 variables, input treesize:125, output treesize:29 [2021-07-13 19:28:04,133 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:28:04,133 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1690757787] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:28:04,133 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:28:04,133 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-07-13 19:28:04,133 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370519425] [2021-07-13 19:28:04,133 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:28:04,134 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:28:04,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:28:04,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:28:04,134 INFO L87 Difference]: Start difference. First operand 51 states and 111 transitions. Second operand has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:28:04,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:28:04,328 INFO L93 Difference]: Finished difference Result 70 states and 138 transitions. [2021-07-13 19:28:04,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:28:04,329 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-07-13 19:28:04,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:28:04,330 INFO L225 Difference]: With dead ends: 70 [2021-07-13 19:28:04,330 INFO L226 Difference]: Without dead ends: 68 [2021-07-13 19:28:04,330 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 230.0ms TimeCoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:28:04,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-07-13 19:28:04,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 52. [2021-07-13 19:28:04,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 2.196078431372549) internal successors, (112), 51 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:28:04,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 112 transitions. [2021-07-13 19:28:04,332 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 112 transitions. Word has length 13 [2021-07-13 19:28:04,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:28:04,332 INFO L482 AbstractCegarLoop]: Abstraction has 52 states and 112 transitions. [2021-07-13 19:28:04,332 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:28:04,332 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 112 transitions. [2021-07-13 19:28:04,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-07-13 19:28:04,333 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:28:04,333 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:28:04,536 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable115 [2021-07-13 19:28:04,537 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:28:04,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:28:04,537 INFO L82 PathProgramCache]: Analyzing trace with hash 1246869404, now seen corresponding path program 15 times [2021-07-13 19:28:04,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:28:04,537 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842692334] [2021-07-13 19:28:04,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:28:04,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:28:04,590 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:28:04,590 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:28:04,590 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842692334] [2021-07-13 19:28:04,590 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1842692334] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:28:04,590 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [974246459] [2021-07-13 19:28:04,590 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:28:04,616 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-13 19:28:04,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:28:04,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-13 19:28:04,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:28:04,676 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:04,676 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:04,677 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:28:04,679 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:28:04,681 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:04,682 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:04,682 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:28:04,683 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:28:04,685 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:04,685 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:04,686 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:28:04,686 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:28:04,689 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:04,689 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:28:04,690 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:28:04,723 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-07-13 19:28:04,723 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:28:04,724 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:28:04,724 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-07-13 19:28:04,768 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:28:04,768 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [974246459] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:28:04,768 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:28:04,769 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-07-13 19:28:04,769 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39458544] [2021-07-13 19:28:04,769 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:28:04,769 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:28:04,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:28:04,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:28:04,769 INFO L87 Difference]: Start difference. First operand 52 states and 112 transitions. Second operand has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 11 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:28:04,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:28:04,906 INFO L93 Difference]: Finished difference Result 90 states and 163 transitions. [2021-07-13 19:28:04,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:28:04,906 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 11 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-07-13 19:28:04,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:28:04,907 INFO L225 Difference]: With dead ends: 90 [2021-07-13 19:28:04,907 INFO L226 Difference]: Without dead ends: 90 [2021-07-13 19:28:04,907 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 168.2ms TimeCoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:28:04,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-07-13 19:28:04,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 51. [2021-07-13 19:28:04,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 2.16) internal successors, (108), 50 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:28:04,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 108 transitions. [2021-07-13 19:28:04,909 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 108 transitions. Word has length 13 [2021-07-13 19:28:04,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:28:04,909 INFO L482 AbstractCegarLoop]: Abstraction has 51 states and 108 transitions. [2021-07-13 19:28:04,909 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 11 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:28:04,909 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 108 transitions. [2021-07-13 19:28:04,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-07-13 19:28:04,909 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:28:04,909 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:28:05,128 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:28:05,128 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:28:05,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:28:05,128 INFO L82 PathProgramCache]: Analyzing trace with hash 2048485632, now seen corresponding path program 16 times [2021-07-13 19:28:05,128 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:28:05,128 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270501577] [2021-07-13 19:28:05,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:28:05,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:28:05,180 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:28:05,180 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:28:05,180 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270501577] [2021-07-13 19:28:05,180 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1270501577] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:28:05,180 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [608781039] [2021-07-13 19:28:05,181 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:28:05,203 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:28:05,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:28:05,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-13 19:28:05,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:28:05,269 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:05,269 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:05,270 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:28:05,271 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:28:05,273 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:05,274 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:05,274 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:28:05,275 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:28:05,277 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:05,277 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:05,278 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:28:05,279 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:28:05,281 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:05,281 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:28:05,282 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:28:05,313 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-07-13 19:28:05,313 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:28:05,314 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:28:05,314 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-07-13 19:28:05,379 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:28:05,379 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [608781039] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:28:05,379 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:28:05,380 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-07-13 19:28:05,380 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219457399] [2021-07-13 19:28:05,380 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:28:05,380 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:28:05,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:28:05,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:28:05,380 INFO L87 Difference]: Start difference. First operand 51 states and 108 transitions. Second operand has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:28:05,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:28:05,598 INFO L93 Difference]: Finished difference Result 82 states and 154 transitions. [2021-07-13 19:28:05,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:28:05,598 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-07-13 19:28:05,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:28:05,599 INFO L225 Difference]: With dead ends: 82 [2021-07-13 19:28:05,599 INFO L226 Difference]: Without dead ends: 79 [2021-07-13 19:28:05,599 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 261.5ms TimeCoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:28:05,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-07-13 19:28:05,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 52. [2021-07-13 19:28:05,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 2.156862745098039) internal successors, (110), 51 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:28:05,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 110 transitions. [2021-07-13 19:28:05,601 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 110 transitions. Word has length 13 [2021-07-13 19:28:05,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:28:05,601 INFO L482 AbstractCegarLoop]: Abstraction has 52 states and 110 transitions. [2021-07-13 19:28:05,601 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:28:05,601 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 110 transitions. [2021-07-13 19:28:05,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-07-13 19:28:05,601 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:28:05,601 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:28:05,807 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2021-07-13 19:28:05,807 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:28:05,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:28:05,808 INFO L82 PathProgramCache]: Analyzing trace with hash -528137958, now seen corresponding path program 17 times [2021-07-13 19:28:05,808 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:28:05,808 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872990904] [2021-07-13 19:28:05,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:28:05,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:28:05,855 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:28:05,856 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:28:05,856 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872990904] [2021-07-13 19:28:05,856 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [872990904] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:28:05,856 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1605865909] [2021-07-13 19:28:05,856 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:28:05,880 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:28:05,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:28:05,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-13 19:28:05,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:28:05,935 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:05,936 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:05,936 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:28:05,937 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:28:05,939 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:05,940 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:05,940 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:28:05,941 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:28:05,943 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:05,943 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:05,944 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:28:05,944 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:28:05,946 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:05,947 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:28:05,948 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:28:05,977 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-07-13 19:28:05,977 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:28:05,978 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:28:05,978 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-07-13 19:28:06,016 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:28:06,017 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1605865909] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:28:06,017 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:28:06,017 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-07-13 19:28:06,017 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086971327] [2021-07-13 19:28:06,017 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:28:06,017 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:28:06,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:28:06,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:28:06,018 INFO L87 Difference]: Start difference. First operand 52 states and 110 transitions. Second operand has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:28:06,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:28:06,152 INFO L93 Difference]: Finished difference Result 75 states and 148 transitions. [2021-07-13 19:28:06,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:28:06,152 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-07-13 19:28:06,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:28:06,152 INFO L225 Difference]: With dead ends: 75 [2021-07-13 19:28:06,153 INFO L226 Difference]: Without dead ends: 75 [2021-07-13 19:28:06,153 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 148.4ms TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:28:06,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-07-13 19:28:06,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 50. [2021-07-13 19:28:06,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 2.0816326530612246) internal successors, (102), 49 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:28:06,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 102 transitions. [2021-07-13 19:28:06,154 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 102 transitions. Word has length 13 [2021-07-13 19:28:06,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:28:06,154 INFO L482 AbstractCegarLoop]: Abstraction has 50 states and 102 transitions. [2021-07-13 19:28:06,154 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:28:06,154 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 102 transitions. [2021-07-13 19:28:06,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-07-13 19:28:06,155 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:28:06,155 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:28:06,362 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2021-07-13 19:28:06,362 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:28:06,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:28:06,362 INFO L82 PathProgramCache]: Analyzing trace with hash -242535592, now seen corresponding path program 18 times [2021-07-13 19:28:06,362 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:28:06,362 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362532204] [2021-07-13 19:28:06,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:28:06,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:28:06,413 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:28:06,414 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:28:06,414 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362532204] [2021-07-13 19:28:06,414 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [362532204] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:28:06,414 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [35765848] [2021-07-13 19:28:06,414 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:28:06,440 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:28:06,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:28:06,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-13 19:28:06,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:28:06,488 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:06,488 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:06,489 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:28:06,490 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:28:06,492 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:06,492 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:06,492 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:28:06,493 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:28:06,495 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:06,496 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:06,496 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:28:06,497 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:28:06,498 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:06,499 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:28:06,500 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:28:06,528 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-07-13 19:28:06,528 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:28:06,529 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:28:06,529 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-07-13 19:28:06,575 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:28:06,575 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [35765848] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:28:06,575 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:28:06,575 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-07-13 19:28:06,575 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674729618] [2021-07-13 19:28:06,575 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:28:06,575 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:28:06,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:28:06,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:28:06,576 INFO L87 Difference]: Start difference. First operand 50 states and 102 transitions. Second operand has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 11 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:28:06,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:28:06,709 INFO L93 Difference]: Finished difference Result 97 states and 180 transitions. [2021-07-13 19:28:06,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:28:06,719 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 11 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-07-13 19:28:06,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:28:06,720 INFO L225 Difference]: With dead ends: 97 [2021-07-13 19:28:06,720 INFO L226 Difference]: Without dead ends: 97 [2021-07-13 19:28:06,722 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 153.4ms TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:28:06,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-07-13 19:28:06,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 54. [2021-07-13 19:28:06,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 2.207547169811321) internal successors, (117), 53 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:28:06,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 117 transitions. [2021-07-13 19:28:06,727 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 117 transitions. Word has length 13 [2021-07-13 19:28:06,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:28:06,727 INFO L482 AbstractCegarLoop]: Abstraction has 54 states and 117 transitions. [2021-07-13 19:28:06,727 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 11 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:28:06,727 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 117 transitions. [2021-07-13 19:28:06,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-07-13 19:28:06,728 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:28:06,728 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:28:06,945 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:28:06,945 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:28:06,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:28:06,945 INFO L82 PathProgramCache]: Analyzing trace with hash 559080636, now seen corresponding path program 19 times [2021-07-13 19:28:06,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:28:06,945 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705416175] [2021-07-13 19:28:06,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:28:06,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:28:07,000 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:28:07,001 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:28:07,001 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705416175] [2021-07-13 19:28:07,001 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1705416175] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:28:07,001 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [293854901] [2021-07-13 19:28:07,001 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:28:07,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:28:07,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-13 19:28:07,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:28:07,093 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:07,094 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:07,094 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:28:07,095 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:28:07,097 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:07,098 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:07,098 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:28:07,099 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:28:07,101 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:07,101 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:07,102 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:28:07,102 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:28:07,106 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:07,107 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:28:07,107 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:28:07,138 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-07-13 19:28:07,138 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:28:07,139 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:28:07,139 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-07-13 19:28:07,214 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:28:07,214 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [293854901] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:28:07,214 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:28:07,215 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-07-13 19:28:07,215 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252543328] [2021-07-13 19:28:07,215 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:28:07,215 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:28:07,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:28:07,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:28:07,215 INFO L87 Difference]: Start difference. First operand 54 states and 117 transitions. Second operand has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:28:07,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:28:07,558 INFO L93 Difference]: Finished difference Result 91 states and 169 transitions. [2021-07-13 19:28:07,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:28:07,558 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-07-13 19:28:07,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:28:07,559 INFO L225 Difference]: With dead ends: 91 [2021-07-13 19:28:07,559 INFO L226 Difference]: Without dead ends: 86 [2021-07-13 19:28:07,559 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 378.3ms TimeCoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:28:07,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-07-13 19:28:07,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 55. [2021-07-13 19:28:07,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 2.185185185185185) internal successors, (118), 54 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:28:07,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 118 transitions. [2021-07-13 19:28:07,561 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 118 transitions. Word has length 13 [2021-07-13 19:28:07,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:28:07,561 INFO L482 AbstractCegarLoop]: Abstraction has 55 states and 118 transitions. [2021-07-13 19:28:07,561 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:28:07,561 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 118 transitions. [2021-07-13 19:28:07,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-07-13 19:28:07,561 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:28:07,561 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:28:07,775 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2021-07-13 19:28:07,775 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:28:07,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:28:07,775 INFO L82 PathProgramCache]: Analyzing trace with hash -2017542954, now seen corresponding path program 20 times [2021-07-13 19:28:07,775 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:28:07,775 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455405] [2021-07-13 19:28:07,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:28:07,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:28:07,827 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:28:07,827 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:28:07,827 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455405] [2021-07-13 19:28:07,827 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [455405] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:28:07,828 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2124029813] [2021-07-13 19:28:07,828 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:28:07,867 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:28:07,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:28:07,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-13 19:28:07,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:28:07,917 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:07,918 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:07,918 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:28:07,919 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:28:07,921 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:07,922 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:07,922 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:28:07,924 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:28:07,926 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:07,926 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:07,927 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:28:07,928 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:28:07,930 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:07,930 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:28:07,931 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:28:07,963 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-07-13 19:28:07,963 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:28:07,964 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:28:07,964 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-07-13 19:28:08,024 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:28:08,025 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2124029813] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:28:08,025 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:28:08,025 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-07-13 19:28:08,025 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808760037] [2021-07-13 19:28:08,025 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:28:08,025 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:28:08,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:28:08,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:28:08,026 INFO L87 Difference]: Start difference. First operand 55 states and 118 transitions. Second operand has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:28:08,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:28:08,248 INFO L93 Difference]: Finished difference Result 80 states and 158 transitions. [2021-07-13 19:28:08,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:28:08,248 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-07-13 19:28:08,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:28:08,248 INFO L225 Difference]: With dead ends: 80 [2021-07-13 19:28:08,248 INFO L226 Difference]: Without dead ends: 80 [2021-07-13 19:28:08,249 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 267.5ms TimeCoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:28:08,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-07-13 19:28:08,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 54. [2021-07-13 19:28:08,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 2.1320754716981134) internal successors, (113), 53 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:28:08,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 113 transitions. [2021-07-13 19:28:08,250 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 113 transitions. Word has length 13 [2021-07-13 19:28:08,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:28:08,251 INFO L482 AbstractCegarLoop]: Abstraction has 54 states and 113 transitions. [2021-07-13 19:28:08,251 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:28:08,251 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 113 transitions. [2021-07-13 19:28:08,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-07-13 19:28:08,251 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:28:08,251 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:28:08,464 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:28:08,465 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:28:08,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:28:08,465 INFO L82 PathProgramCache]: Analyzing trace with hash 566811034, now seen corresponding path program 21 times [2021-07-13 19:28:08,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:28:08,465 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059170884] [2021-07-13 19:28:08,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:28:08,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:28:08,522 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:28:08,522 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:28:08,522 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059170884] [2021-07-13 19:28:08,522 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2059170884] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:28:08,522 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1184950950] [2021-07-13 19:28:08,522 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:28:08,546 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:28:08,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:28:08,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-13 19:28:08,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:28:08,619 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:08,620 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:08,620 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:28:08,625 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:28:08,628 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:08,628 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:28:08,629 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:28:08,649 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-07-13 19:28:08,650 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:28:08,651 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:28:08,651 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-07-13 19:28:08,667 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:28:08,667 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1184950950] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:28:08,667 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:28:08,667 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-07-13 19:28:08,667 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678572123] [2021-07-13 19:28:08,667 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:28:08,668 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:28:08,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:28:08,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:28:08,668 INFO L87 Difference]: Start difference. First operand 54 states and 113 transitions. Second operand has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:28:08,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:28:08,740 INFO L93 Difference]: Finished difference Result 80 states and 158 transitions. [2021-07-13 19:28:08,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:28:08,741 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-07-13 19:28:08,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:28:08,741 INFO L225 Difference]: With dead ends: 80 [2021-07-13 19:28:08,742 INFO L226 Difference]: Without dead ends: 80 [2021-07-13 19:28:08,742 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 88.0ms TimeCoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:28:08,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-07-13 19:28:08,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 54. [2021-07-13 19:28:08,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 2.1320754716981134) internal successors, (113), 53 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:28:08,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 113 transitions. [2021-07-13 19:28:08,743 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 113 transitions. Word has length 13 [2021-07-13 19:28:08,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:28:08,744 INFO L482 AbstractCegarLoop]: Abstraction has 54 states and 113 transitions. [2021-07-13 19:28:08,744 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:28:08,744 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 113 transitions. [2021-07-13 19:28:08,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-07-13 19:28:08,744 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:28:08,744 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:28:08,964 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2021-07-13 19:28:08,964 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:28:08,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:28:08,964 INFO L82 PathProgramCache]: Analyzing trace with hash 1546997946, now seen corresponding path program 22 times [2021-07-13 19:28:08,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:28:08,965 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182647243] [2021-07-13 19:28:08,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:28:08,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:28:09,013 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:28:09,013 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:28:09,014 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182647243] [2021-07-13 19:28:09,014 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1182647243] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:28:09,014 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1310287725] [2021-07-13 19:28:09,014 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:28:09,039 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:28:09,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:28:09,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-13 19:28:09,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:28:09,098 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:09,099 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:28:09,099 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:28:09,102 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:28:09,103 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:28:09,118 INFO L628 ElimStorePlain]: treesize reduction 27, result has 30.8 percent of original size [2021-07-13 19:28:09,118 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:28:09,119 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:28:09,119 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:53, output treesize:12 [2021-07-13 19:28:09,135 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:28:09,136 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1310287725] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:28:09,136 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:28:09,136 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-07-13 19:28:09,136 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849554245] [2021-07-13 19:28:09,136 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:28:09,136 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:28:09,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:28:09,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:28:09,137 INFO L87 Difference]: Start difference. First operand 54 states and 113 transitions. Second operand has 10 states, 10 states have (on average 1.8) internal successors, (18), 10 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:28:09,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:28:09,232 INFO L93 Difference]: Finished difference Result 82 states and 165 transitions. [2021-07-13 19:28:09,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 19:28:09,232 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 10 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-07-13 19:28:09,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:28:09,233 INFO L225 Difference]: With dead ends: 82 [2021-07-13 19:28:09,233 INFO L226 Difference]: Without dead ends: 82 [2021-07-13 19:28:09,233 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 102.2ms TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:28:09,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-07-13 19:28:09,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 53. [2021-07-13 19:28:09,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 2.1538461538461537) internal successors, (112), 52 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:28:09,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 112 transitions. [2021-07-13 19:28:09,235 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 112 transitions. Word has length 13 [2021-07-13 19:28:09,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:28:09,235 INFO L482 AbstractCegarLoop]: Abstraction has 53 states and 112 transitions. [2021-07-13 19:28:09,235 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 10 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:28:09,235 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 112 transitions. [2021-07-13 19:28:09,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-07-13 19:28:09,235 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:28:09,235 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:28:09,448 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:28:09,449 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:28:09,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:28:09,449 INFO L82 PathProgramCache]: Analyzing trace with hash 1390433762, now seen corresponding path program 23 times [2021-07-13 19:28:09,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:28:09,449 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58917465] [2021-07-13 19:28:09,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:28:09,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:28:09,491 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:28:09,492 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:28:09,492 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58917465] [2021-07-13 19:28:09,492 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [58917465] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:28:09,492 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [363723402] [2021-07-13 19:28:09,492 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:28:09,520 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:28:09,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:28:09,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-13 19:28:09,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:28:09,601 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:28:09,602 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:28:09,604 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:28:09,605 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:28:09,607 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:28:09,608 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:28:09,610 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:28:09,611 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:28:09,614 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:09,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:28:09,615 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:28:09,618 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:28:09,618 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:28:09,647 INFO L628 ElimStorePlain]: treesize reduction 34, result has 37.0 percent of original size [2021-07-13 19:28:09,647 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:28:09,648 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:28:09,648 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 2 variables, input treesize:107, output treesize:20 [2021-07-13 19:28:09,672 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:28:09,673 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [363723402] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:28:09,673 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:28:09,673 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-07-13 19:28:09,673 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136572856] [2021-07-13 19:28:09,673 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:28:09,673 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:28:09,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:28:09,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:28:09,673 INFO L87 Difference]: Start difference. First operand 53 states and 112 transitions. Second operand has 10 states, 10 states have (on average 1.8) internal successors, (18), 10 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:28:09,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:28:09,876 INFO L93 Difference]: Finished difference Result 80 states and 158 transitions. [2021-07-13 19:28:09,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:28:09,876 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 10 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-07-13 19:28:09,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:28:09,877 INFO L225 Difference]: With dead ends: 80 [2021-07-13 19:28:09,877 INFO L226 Difference]: Without dead ends: 77 [2021-07-13 19:28:09,877 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 215.9ms TimeCoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:28:09,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-07-13 19:28:09,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 53. [2021-07-13 19:28:09,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 2.1346153846153846) internal successors, (111), 52 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:28:09,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 111 transitions. [2021-07-13 19:28:09,879 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 111 transitions. Word has length 13 [2021-07-13 19:28:09,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:28:09,879 INFO L482 AbstractCegarLoop]: Abstraction has 53 states and 111 transitions. [2021-07-13 19:28:09,879 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 10 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:28:09,879 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 111 transitions. [2021-07-13 19:28:09,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-07-13 19:28:09,879 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:28:09,879 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:28:10,080 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable150 [2021-07-13 19:28:10,080 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:28:10,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:28:10,080 INFO L82 PathProgramCache]: Analyzing trace with hash -1413378020, now seen corresponding path program 24 times [2021-07-13 19:28:10,080 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:28:10,080 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508281650] [2021-07-13 19:28:10,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:28:10,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:28:10,120 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:28:10,121 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:28:10,121 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508281650] [2021-07-13 19:28:10,121 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1508281650] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:28:10,121 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [850379493] [2021-07-13 19:28:10,121 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:28:10,144 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-13 19:28:10,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:28:10,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-13 19:28:10,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:28:10,245 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:10,245 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:10,245 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:28:10,247 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:28:10,252 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:10,253 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:28:10,253 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:28:10,273 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-07-13 19:28:10,273 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:28:10,274 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:28:10,274 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-07-13 19:28:10,289 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:28:10,289 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [850379493] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:28:10,289 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:28:10,290 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-07-13 19:28:10,290 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559657952] [2021-07-13 19:28:10,291 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:28:10,291 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:28:10,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:28:10,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:28:10,292 INFO L87 Difference]: Start difference. First operand 53 states and 111 transitions. Second operand has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 11 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:28:10,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:28:10,361 INFO L93 Difference]: Finished difference Result 83 states and 167 transitions. [2021-07-13 19:28:10,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 19:28:10,361 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 11 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-07-13 19:28:10,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:28:10,361 INFO L225 Difference]: With dead ends: 83 [2021-07-13 19:28:10,362 INFO L226 Difference]: Without dead ends: 83 [2021-07-13 19:28:10,362 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 81.0ms TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:28:10,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-07-13 19:28:10,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 54. [2021-07-13 19:28:10,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 2.150943396226415) internal successors, (114), 53 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:28:10,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 114 transitions. [2021-07-13 19:28:10,363 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 114 transitions. Word has length 13 [2021-07-13 19:28:10,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:28:10,363 INFO L482 AbstractCegarLoop]: Abstraction has 54 states and 114 transitions. [2021-07-13 19:28:10,363 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 11 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:28:10,363 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 114 transitions. [2021-07-13 19:28:10,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-07-13 19:28:10,364 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:28:10,364 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:28:10,572 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2021-07-13 19:28:10,573 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:28:10,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:28:10,573 INFO L82 PathProgramCache]: Analyzing trace with hash 1961888568, now seen corresponding path program 25 times [2021-07-13 19:28:10,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:28:10,573 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872732791] [2021-07-13 19:28:10,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:28:10,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:28:10,617 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:28:10,618 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:28:10,618 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872732791] [2021-07-13 19:28:10,618 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1872732791] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:28:10,618 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1737506512] [2021-07-13 19:28:10,618 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:28:10,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:28:10,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-13 19:28:10,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:28:10,763 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:28:10,764 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:28:10,766 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:28:10,767 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:28:10,770 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:28:10,770 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:28:10,773 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:10,773 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:10,774 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:28:10,774 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:28:10,777 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:10,777 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:10,778 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:28:10,778 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:28:10,780 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:28:10,781 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:28:10,810 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-07-13 19:28:10,810 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:28:10,811 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:28:10,811 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-07-13 19:28:10,833 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:28:10,833 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1737506512] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:28:10,833 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:28:10,833 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-07-13 19:28:10,834 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469386790] [2021-07-13 19:28:10,834 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:28:10,834 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:28:10,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:28:10,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:28:10,834 INFO L87 Difference]: Start difference. First operand 54 states and 114 transitions. Second operand has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:28:11,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:28:11,080 INFO L93 Difference]: Finished difference Result 82 states and 162 transitions. [2021-07-13 19:28:11,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:28:11,085 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-07-13 19:28:11,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:28:11,086 INFO L225 Difference]: With dead ends: 82 [2021-07-13 19:28:11,086 INFO L226 Difference]: Without dead ends: 80 [2021-07-13 19:28:11,086 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 271.0ms TimeCoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:28:11,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-07-13 19:28:11,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 54. [2021-07-13 19:28:11,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 2.1320754716981134) internal successors, (113), 53 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:28:11,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 113 transitions. [2021-07-13 19:28:11,088 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 113 transitions. Word has length 13 [2021-07-13 19:28:11,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:28:11,088 INFO L482 AbstractCegarLoop]: Abstraction has 54 states and 113 transitions. [2021-07-13 19:28:11,088 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:28:11,088 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 113 transitions. [2021-07-13 19:28:11,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-07-13 19:28:11,088 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:28:11,089 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:28:11,305 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable159 [2021-07-13 19:28:11,305 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:28:11,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:28:11,305 INFO L82 PathProgramCache]: Analyzing trace with hash -1405647622, now seen corresponding path program 26 times [2021-07-13 19:28:11,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:28:11,305 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941121865] [2021-07-13 19:28:11,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:28:11,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:28:11,354 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:28:11,355 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:28:11,355 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941121865] [2021-07-13 19:28:11,355 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1941121865] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:28:11,355 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [342523564] [2021-07-13 19:28:11,355 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:28:11,384 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:28:11,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:28:11,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-13 19:28:11,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:28:11,437 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:11,438 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:11,438 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:28:11,439 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:28:11,441 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:11,442 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:11,443 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:28:11,443 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:28:11,446 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:11,446 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:11,446 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:28:11,448 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:28:11,450 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:11,451 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:28:11,452 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:28:11,484 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-07-13 19:28:11,484 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:28:11,485 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:28:11,485 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-07-13 19:28:11,530 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:28:11,530 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [342523564] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:28:11,530 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:28:11,530 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-07-13 19:28:11,531 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282435290] [2021-07-13 19:28:11,531 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:28:11,531 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:28:11,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:28:11,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:28:11,531 INFO L87 Difference]: Start difference. First operand 54 states and 113 transitions. Second operand has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 11 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:28:11,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:28:11,840 INFO L93 Difference]: Finished difference Result 122 states and 227 transitions. [2021-07-13 19:28:11,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:28:11,841 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 11 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-07-13 19:28:11,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:28:11,841 INFO L225 Difference]: With dead ends: 122 [2021-07-13 19:28:11,841 INFO L226 Difference]: Without dead ends: 122 [2021-07-13 19:28:11,842 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 303.1ms TimeCoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:28:11,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-07-13 19:28:11,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 57. [2021-07-13 19:28:11,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 2.2142857142857144) internal successors, (124), 56 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:28:11,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 124 transitions. [2021-07-13 19:28:11,843 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 124 transitions. Word has length 13 [2021-07-13 19:28:11,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:28:11,844 INFO L482 AbstractCegarLoop]: Abstraction has 57 states and 124 transitions. [2021-07-13 19:28:11,844 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 11 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:28:11,844 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 124 transitions. [2021-07-13 19:28:11,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-07-13 19:28:11,844 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:28:11,844 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:28:12,044 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable166,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:28:12,045 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:28:12,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:28:12,045 INFO L82 PathProgramCache]: Analyzing trace with hash -604031394, now seen corresponding path program 27 times [2021-07-13 19:28:12,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:28:12,045 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392099482] [2021-07-13 19:28:12,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:28:12,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:28:12,096 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:28:12,097 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:28:12,097 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392099482] [2021-07-13 19:28:12,097 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1392099482] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:28:12,097 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1442728584] [2021-07-13 19:28:12,097 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:28:12,121 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-13 19:28:12,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:28:12,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-13 19:28:12,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:28:12,174 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:12,175 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:12,175 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:28:12,176 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:28:12,178 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:12,178 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:12,179 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:28:12,179 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:28:12,181 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:12,182 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:12,182 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:28:12,183 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:28:12,185 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:12,185 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:28:12,186 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:28:12,214 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-07-13 19:28:12,214 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:28:12,215 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:28:12,215 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-07-13 19:28:12,272 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:28:12,272 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1442728584] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:28:12,272 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:28:12,272 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-07-13 19:28:12,273 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065483798] [2021-07-13 19:28:12,273 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:28:12,273 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:28:12,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:28:12,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:28:12,273 INFO L87 Difference]: Start difference. First operand 57 states and 124 transitions. Second operand has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:28:12,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:28:12,776 INFO L93 Difference]: Finished difference Result 115 states and 215 transitions. [2021-07-13 19:28:12,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:28:12,776 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-07-13 19:28:12,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:28:12,777 INFO L225 Difference]: With dead ends: 115 [2021-07-13 19:28:12,777 INFO L226 Difference]: Without dead ends: 112 [2021-07-13 19:28:12,777 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 484.1ms TimeCoverageRelationStatistics Valid=112, Invalid=394, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:28:12,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-07-13 19:28:12,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 58. [2021-07-13 19:28:12,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 2.210526315789474) internal successors, (126), 57 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:28:12,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 126 transitions. [2021-07-13 19:28:12,779 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 126 transitions. Word has length 13 [2021-07-13 19:28:12,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:28:12,779 INFO L482 AbstractCegarLoop]: Abstraction has 58 states and 126 transitions. [2021-07-13 19:28:12,779 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:28:12,780 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 126 transitions. [2021-07-13 19:28:12,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-07-13 19:28:12,780 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:28:12,780 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:28:12,992 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:28:12,993 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:28:12,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:28:12,993 INFO L82 PathProgramCache]: Analyzing trace with hash 1114312312, now seen corresponding path program 28 times [2021-07-13 19:28:12,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:28:12,993 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003930235] [2021-07-13 19:28:12,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:28:12,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:28:13,042 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:28:13,042 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:28:13,042 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003930235] [2021-07-13 19:28:13,042 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2003930235] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:28:13,042 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [233510302] [2021-07-13 19:28:13,042 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:28:13,066 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:28:13,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:28:13,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-13 19:28:13,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:28:13,115 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:13,115 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:13,115 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:28:13,116 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:28:13,118 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:13,119 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:13,119 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:28:13,121 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:28:13,123 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:13,123 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:13,123 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:28:13,124 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:28:13,127 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:13,128 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:28:13,129 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:28:13,158 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-07-13 19:28:13,158 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:28:13,159 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:28:13,159 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-07-13 19:28:13,202 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:28:13,202 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [233510302] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:28:13,202 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:28:13,202 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-07-13 19:28:13,202 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555838907] [2021-07-13 19:28:13,202 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:28:13,202 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:28:13,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:28:13,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:28:13,203 INFO L87 Difference]: Start difference. First operand 58 states and 126 transitions. Second operand has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:28:13,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:28:13,476 INFO L93 Difference]: Finished difference Result 105 states and 200 transitions. [2021-07-13 19:28:13,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:28:13,477 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-07-13 19:28:13,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:28:13,477 INFO L225 Difference]: With dead ends: 105 [2021-07-13 19:28:13,477 INFO L226 Difference]: Without dead ends: 105 [2021-07-13 19:28:13,477 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 268.9ms TimeCoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:28:13,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-07-13 19:28:13,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 56. [2021-07-13 19:28:13,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 2.1454545454545455) internal successors, (118), 55 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:28:13,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 118 transitions. [2021-07-13 19:28:13,479 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 118 transitions. Word has length 13 [2021-07-13 19:28:13,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:28:13,480 INFO L482 AbstractCegarLoop]: Abstraction has 56 states and 118 transitions. [2021-07-13 19:28:13,480 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:28:13,480 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 118 transitions. [2021-07-13 19:28:13,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-07-13 19:28:13,480 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:28:13,480 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:28:13,688 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable176 [2021-07-13 19:28:13,689 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:28:13,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:28:13,689 INFO L82 PathProgramCache]: Analyzing trace with hash 732792740, now seen corresponding path program 29 times [2021-07-13 19:28:13,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:28:13,689 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247994580] [2021-07-13 19:28:13,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:28:13,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:28:13,735 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:28:13,735 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:28:13,735 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247994580] [2021-07-13 19:28:13,735 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [247994580] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:28:13,736 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [949158602] [2021-07-13 19:28:13,736 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:28:13,761 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:28:13,761 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:28:13,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-13 19:28:13,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:28:13,843 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:13,843 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:13,844 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:28:13,844 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:28:13,847 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:13,848 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:28:13,848 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:28:13,875 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-07-13 19:28:13,875 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:28:13,876 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:28:13,876 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-07-13 19:28:13,893 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:28:13,893 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [949158602] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:28:13,893 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:28:13,893 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-07-13 19:28:13,893 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791400149] [2021-07-13 19:28:13,893 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:28:13,893 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:28:13,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:28:13,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:28:13,894 INFO L87 Difference]: Start difference. First operand 56 states and 118 transitions. Second operand has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 11 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:28:13,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:28:13,991 INFO L93 Difference]: Finished difference Result 91 states and 181 transitions. [2021-07-13 19:28:13,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:28:13,991 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 11 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-07-13 19:28:13,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:28:13,992 INFO L225 Difference]: With dead ends: 91 [2021-07-13 19:28:13,992 INFO L226 Difference]: Without dead ends: 91 [2021-07-13 19:28:13,992 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 79.7ms TimeCoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:28:13,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-07-13 19:28:13,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 60. [2021-07-13 19:28:13,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 2.23728813559322) internal successors, (132), 59 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:28:13,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 132 transitions. [2021-07-13 19:28:13,994 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 132 transitions. Word has length 13 [2021-07-13 19:28:13,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:28:13,994 INFO L482 AbstractCegarLoop]: Abstraction has 60 states and 132 transitions. [2021-07-13 19:28:13,994 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 11 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:28:13,994 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 132 transitions. [2021-07-13 19:28:13,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-07-13 19:28:13,994 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:28:13,994 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:28:14,208 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:28:14,209 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:28:14,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:28:14,209 INFO L82 PathProgramCache]: Analyzing trace with hash -186907968, now seen corresponding path program 30 times [2021-07-13 19:28:14,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:28:14,209 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189957527] [2021-07-13 19:28:14,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:28:14,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:28:14,248 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:28:14,249 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:28:14,249 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189957527] [2021-07-13 19:28:14,249 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1189957527] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:28:14,249 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1173115346] [2021-07-13 19:28:14,249 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:28:14,274 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-13 19:28:14,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:28:14,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-13 19:28:14,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:28:14,371 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:28:14,372 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:28:14,374 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:28:14,375 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:28:14,377 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:28:14,378 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:28:14,380 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:14,381 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:14,381 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:28:14,382 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:28:14,385 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:14,385 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:14,386 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:28:14,386 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:28:14,389 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:28:14,389 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:28:14,419 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-07-13 19:28:14,419 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:28:14,420 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:28:14,420 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-07-13 19:28:14,442 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:28:14,443 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1173115346] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:28:14,443 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:28:14,443 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-07-13 19:28:14,443 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193973457] [2021-07-13 19:28:14,443 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:28:14,443 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:28:14,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:28:14,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:28:14,443 INFO L87 Difference]: Start difference. First operand 60 states and 132 transitions. Second operand has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:28:14,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:28:14,677 INFO L93 Difference]: Finished difference Result 80 states and 161 transitions. [2021-07-13 19:28:14,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:28:14,678 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-07-13 19:28:14,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:28:14,678 INFO L225 Difference]: With dead ends: 80 [2021-07-13 19:28:14,678 INFO L226 Difference]: Without dead ends: 78 [2021-07-13 19:28:14,678 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 223.0ms TimeCoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:28:14,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-07-13 19:28:14,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 61. [2021-07-13 19:28:14,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 2.216666666666667) internal successors, (133), 60 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:28:14,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 133 transitions. [2021-07-13 19:28:14,680 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 133 transitions. Word has length 13 [2021-07-13 19:28:14,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:28:14,680 INFO L482 AbstractCegarLoop]: Abstraction has 61 states and 133 transitions. [2021-07-13 19:28:14,680 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:28:14,680 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 133 transitions. [2021-07-13 19:28:14,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-07-13 19:28:14,681 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:28:14,681 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:28:14,881 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable183 [2021-07-13 19:28:14,881 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:28:14,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:28:14,882 INFO L82 PathProgramCache]: Analyzing trace with hash 740523138, now seen corresponding path program 31 times [2021-07-13 19:28:14,882 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:28:14,882 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405881023] [2021-07-13 19:28:14,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:28:14,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:28:14,925 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:28:14,925 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:28:14,925 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405881023] [2021-07-13 19:28:14,925 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [405881023] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:28:14,925 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1505071405] [2021-07-13 19:28:14,925 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:28:14,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:28:14,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-13 19:28:14,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:28:14,994 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:14,995 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:14,995 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:28:14,996 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:28:15,000 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:15,002 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:15,003 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:28:15,009 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:28:15,011 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:15,012 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:15,012 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:28:15,013 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:28:15,015 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:15,015 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:28:15,016 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:28:15,045 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-07-13 19:28:15,045 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:28:15,046 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:28:15,046 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-07-13 19:28:15,093 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:28:15,094 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1505071405] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:28:15,094 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:28:15,094 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-07-13 19:28:15,094 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695862579] [2021-07-13 19:28:15,094 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:28:15,094 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:28:15,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:28:15,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:28:15,094 INFO L87 Difference]: Start difference. First operand 61 states and 133 transitions. Second operand has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 11 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:28:15,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:28:15,302 INFO L93 Difference]: Finished difference Result 105 states and 196 transitions. [2021-07-13 19:28:15,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:28:15,303 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 11 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-07-13 19:28:15,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:28:15,303 INFO L225 Difference]: With dead ends: 105 [2021-07-13 19:28:15,303 INFO L226 Difference]: Without dead ends: 105 [2021-07-13 19:28:15,303 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 202.7ms TimeCoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:28:15,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-07-13 19:28:15,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 59. [2021-07-13 19:28:15,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 2.206896551724138) internal successors, (128), 58 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:28:15,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 128 transitions. [2021-07-13 19:28:15,305 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 128 transitions. Word has length 13 [2021-07-13 19:28:15,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:28:15,305 INFO L482 AbstractCegarLoop]: Abstraction has 59 states and 128 transitions. [2021-07-13 19:28:15,305 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 11 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:28:15,305 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 128 transitions. [2021-07-13 19:28:15,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-07-13 19:28:15,305 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:28:15,306 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:28:15,516 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable190,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:28:15,517 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:28:15,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:28:15,517 INFO L82 PathProgramCache]: Analyzing trace with hash 1542139366, now seen corresponding path program 32 times [2021-07-13 19:28:15,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:28:15,517 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292846178] [2021-07-13 19:28:15,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:28:15,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:28:15,565 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:28:15,565 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:28:15,565 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292846178] [2021-07-13 19:28:15,565 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1292846178] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:28:15,565 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1218853347] [2021-07-13 19:28:15,565 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:28:15,587 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:28:15,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:28:15,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-13 19:28:15,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:28:15,637 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:15,638 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:15,638 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:28:15,639 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:28:15,653 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:15,654 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:15,654 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:28:15,655 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:28:15,657 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:15,658 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:15,658 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:28:15,659 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:28:15,661 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:15,662 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:28:15,662 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:28:15,692 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-07-13 19:28:15,693 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:28:15,693 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:28:15,693 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-07-13 19:28:15,754 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:28:15,754 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1218853347] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:28:15,754 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:28:15,754 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-07-13 19:28:15,754 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695564176] [2021-07-13 19:28:15,755 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:28:15,755 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:28:15,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:28:15,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:28:15,755 INFO L87 Difference]: Start difference. First operand 59 states and 128 transitions. Second operand has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:28:15,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:28:15,984 INFO L93 Difference]: Finished difference Result 87 states and 167 transitions. [2021-07-13 19:28:15,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:28:15,985 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-07-13 19:28:15,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:28:15,985 INFO L225 Difference]: With dead ends: 87 [2021-07-13 19:28:15,985 INFO L226 Difference]: Without dead ends: 84 [2021-07-13 19:28:15,985 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 241.6ms TimeCoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:28:15,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-07-13 19:28:15,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 60. [2021-07-13 19:28:15,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 2.2033898305084745) internal successors, (130), 59 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:28:15,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 130 transitions. [2021-07-13 19:28:15,987 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 130 transitions. Word has length 13 [2021-07-13 19:28:15,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:28:15,987 INFO L482 AbstractCegarLoop]: Abstraction has 60 states and 130 transitions. [2021-07-13 19:28:15,987 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:28:15,988 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 130 transitions. [2021-07-13 19:28:15,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-07-13 19:28:15,988 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:28:15,988 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:28:16,204 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable194 [2021-07-13 19:28:16,204 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:28:16,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:28:16,205 INFO L82 PathProgramCache]: Analyzing trace with hash -1034484224, now seen corresponding path program 33 times [2021-07-13 19:28:16,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:28:16,205 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351781051] [2021-07-13 19:28:16,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:28:16,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:28:16,252 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:28:16,252 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:28:16,252 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351781051] [2021-07-13 19:28:16,252 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1351781051] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:28:16,253 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1714525196] [2021-07-13 19:28:16,253 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:28:16,277 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:28:16,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:28:16,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-13 19:28:16,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:28:16,335 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:16,335 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:16,336 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:28:16,336 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:28:16,338 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:16,339 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:16,339 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:28:16,340 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:28:16,342 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:16,342 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:16,343 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:28:16,344 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:28:16,346 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:16,346 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:28:16,347 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:28:16,378 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-07-13 19:28:16,378 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:28:16,378 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:28:16,379 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-07-13 19:28:16,418 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:28:16,418 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1714525196] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:28:16,418 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:28:16,418 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-07-13 19:28:16,418 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608543208] [2021-07-13 19:28:16,418 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:28:16,419 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:28:16,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:28:16,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:28:16,419 INFO L87 Difference]: Start difference. First operand 60 states and 130 transitions. Second operand has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:28:16,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:28:16,545 INFO L93 Difference]: Finished difference Result 80 states and 161 transitions. [2021-07-13 19:28:16,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:28:16,546 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-07-13 19:28:16,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:28:16,546 INFO L225 Difference]: With dead ends: 80 [2021-07-13 19:28:16,546 INFO L226 Difference]: Without dead ends: 80 [2021-07-13 19:28:16,546 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 151.4ms TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:28:16,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-07-13 19:28:16,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 55. [2021-07-13 19:28:16,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 2.1296296296296298) internal successors, (115), 54 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:28:16,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 115 transitions. [2021-07-13 19:28:16,548 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 115 transitions. Word has length 13 [2021-07-13 19:28:16,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:28:16,548 INFO L482 AbstractCegarLoop]: Abstraction has 55 states and 115 transitions. [2021-07-13 19:28:16,548 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:28:16,548 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 115 transitions. [2021-07-13 19:28:16,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-07-13 19:28:16,548 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:28:16,548 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:28:16,764 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable200 [2021-07-13 19:28:16,765 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:28:16,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:28:16,766 INFO L82 PathProgramCache]: Analyzing trace with hash -748881858, now seen corresponding path program 34 times [2021-07-13 19:28:16,766 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:28:16,766 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642763362] [2021-07-13 19:28:16,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:28:16,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:28:16,843 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:28:16,843 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:28:16,843 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642763362] [2021-07-13 19:28:16,843 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1642763362] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:28:16,844 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1629793235] [2021-07-13 19:28:16,844 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:28:16,866 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:28:16,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:28:16,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-13 19:28:16,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:28:16,928 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:16,928 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:16,929 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:28:16,930 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:28:16,932 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:16,932 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:16,932 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:28:16,933 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:28:16,935 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:16,936 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:16,936 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:28:16,937 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:28:16,940 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:16,940 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:28:16,941 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:28:16,973 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-07-13 19:28:16,973 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:28:16,973 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:28:16,974 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-07-13 19:28:17,013 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:28:17,014 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1629793235] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:28:17,014 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:28:17,014 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-07-13 19:28:17,014 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246583828] [2021-07-13 19:28:17,014 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:28:17,014 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:28:17,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:28:17,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:28:17,015 INFO L87 Difference]: Start difference. First operand 55 states and 115 transitions. Second operand has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 11 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:28:17,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:28:17,155 INFO L93 Difference]: Finished difference Result 105 states and 196 transitions. [2021-07-13 19:28:17,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:28:17,156 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 11 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-07-13 19:28:17,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:28:17,156 INFO L225 Difference]: With dead ends: 105 [2021-07-13 19:28:17,156 INFO L226 Difference]: Without dead ends: 105 [2021-07-13 19:28:17,156 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 168.8ms TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:28:17,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-07-13 19:28:17,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 57. [2021-07-13 19:28:17,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 2.1964285714285716) internal successors, (123), 56 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:28:17,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 123 transitions. [2021-07-13 19:28:17,158 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 123 transitions. Word has length 13 [2021-07-13 19:28:17,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:28:17,158 INFO L482 AbstractCegarLoop]: Abstraction has 57 states and 123 transitions. [2021-07-13 19:28:17,158 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 11 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:28:17,158 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 123 transitions. [2021-07-13 19:28:17,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-07-13 19:28:17,159 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:28:17,159 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:28:17,359 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable204,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:28:17,359 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:28:17,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:28:17,359 INFO L82 PathProgramCache]: Analyzing trace with hash 52734370, now seen corresponding path program 35 times [2021-07-13 19:28:17,360 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:28:17,360 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899435986] [2021-07-13 19:28:17,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:28:17,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:28:17,413 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:28:17,413 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:28:17,413 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899435986] [2021-07-13 19:28:17,413 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [899435986] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:28:17,413 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [712189986] [2021-07-13 19:28:17,413 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:28:17,435 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:28:17,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:28:17,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-13 19:28:17,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:28:17,481 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:17,482 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:17,482 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:28:17,483 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:28:17,485 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:17,486 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:17,486 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:28:17,488 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:28:17,490 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:17,490 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:17,490 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:28:17,491 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:28:17,495 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:17,495 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:28:17,497 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:28:17,534 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-07-13 19:28:17,534 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:28:17,535 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:28:17,535 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-07-13 19:28:17,596 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:28:17,597 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [712189986] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:28:17,597 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:28:17,597 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-07-13 19:28:17,597 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078716288] [2021-07-13 19:28:17,597 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:28:17,597 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:28:17,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:28:17,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:28:17,597 INFO L87 Difference]: Start difference. First operand 57 states and 123 transitions. Second operand has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:28:17,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:28:17,879 INFO L93 Difference]: Finished difference Result 93 states and 173 transitions. [2021-07-13 19:28:17,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 19:28:17,879 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-07-13 19:28:17,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:28:17,880 INFO L225 Difference]: With dead ends: 93 [2021-07-13 19:28:17,880 INFO L226 Difference]: Without dead ends: 88 [2021-07-13 19:28:17,880 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 306.1ms TimeCoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:28:17,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-07-13 19:28:17,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 58. [2021-07-13 19:28:17,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 2.175438596491228) internal successors, (124), 57 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:28:17,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 124 transitions. [2021-07-13 19:28:17,881 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 124 transitions. Word has length 13 [2021-07-13 19:28:17,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:28:17,882 INFO L482 AbstractCegarLoop]: Abstraction has 58 states and 124 transitions. [2021-07-13 19:28:17,882 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:28:17,882 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 124 transitions. [2021-07-13 19:28:17,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-07-13 19:28:17,882 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:28:17,882 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:28:18,098 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable208,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:28:18,098 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:28:18,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:28:18,099 INFO L82 PathProgramCache]: Analyzing trace with hash 1771078076, now seen corresponding path program 36 times [2021-07-13 19:28:18,099 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:28:18,099 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374537758] [2021-07-13 19:28:18,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:28:18,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:28:18,160 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:28:18,160 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:28:18,160 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374537758] [2021-07-13 19:28:18,160 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [374537758] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:28:18,160 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [947191760] [2021-07-13 19:28:18,160 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:28:18,190 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:28:18,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:28:18,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-13 19:28:18,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:28:18,247 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:18,247 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:18,248 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:28:18,249 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:28:18,251 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:18,252 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:18,252 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:28:18,253 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:28:18,255 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:18,255 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:18,256 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:28:18,256 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:28:18,259 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:18,259 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:28:18,260 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:28:18,295 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-07-13 19:28:18,296 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:28:18,296 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:28:18,297 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-07-13 19:28:18,342 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:28:18,342 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [947191760] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:28:18,342 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:28:18,342 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-07-13 19:28:18,342 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768323695] [2021-07-13 19:28:18,342 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:28:18,342 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:28:18,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:28:18,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:28:18,343 INFO L87 Difference]: Start difference. First operand 58 states and 124 transitions. Second operand has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:28:18,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:28:18,535 INFO L93 Difference]: Finished difference Result 82 states and 162 transitions. [2021-07-13 19:28:18,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:28:18,536 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-07-13 19:28:18,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:28:18,536 INFO L225 Difference]: With dead ends: 82 [2021-07-13 19:28:18,536 INFO L226 Difference]: Without dead ends: 82 [2021-07-13 19:28:18,537 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 214.8ms TimeCoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:28:18,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-07-13 19:28:18,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 57. [2021-07-13 19:28:18,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 2.125) internal successors, (119), 56 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:28:18,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 119 transitions. [2021-07-13 19:28:18,538 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 119 transitions. Word has length 13 [2021-07-13 19:28:18,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:28:18,538 INFO L482 AbstractCegarLoop]: Abstraction has 57 states and 119 transitions. [2021-07-13 19:28:18,538 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:28:18,538 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 119 transitions. [2021-07-13 19:28:18,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-07-13 19:28:18,538 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:28:18,539 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:28:18,753 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable214,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:28:18,753 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:28:18,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:28:18,753 INFO L82 PathProgramCache]: Analyzing trace with hash 60464768, now seen corresponding path program 37 times [2021-07-13 19:28:18,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:28:18,753 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987100646] [2021-07-13 19:28:18,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:28:18,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:28:18,805 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:28:18,806 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:28:18,806 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987100646] [2021-07-13 19:28:18,806 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1987100646] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:28:18,806 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1714893206] [2021-07-13 19:28:18,806 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:28:18,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:28:18,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-13 19:28:18,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:28:18,880 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:18,880 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:18,881 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:28:18,881 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:28:18,883 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:18,883 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:28:18,884 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:28:18,899 INFO L628 ElimStorePlain]: treesize reduction 30, result has 33.3 percent of original size [2021-07-13 19:28:18,899 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:28:18,900 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:28:18,900 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:59, output treesize:15 [2021-07-13 19:28:18,917 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:28:18,917 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1714893206] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:28:18,917 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:28:18,917 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-07-13 19:28:18,918 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225654717] [2021-07-13 19:28:18,918 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:28:18,918 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:28:18,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:28:18,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:28:18,918 INFO L87 Difference]: Start difference. First operand 57 states and 119 transitions. Second operand has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:28:18,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:28:18,991 INFO L93 Difference]: Finished difference Result 82 states and 162 transitions. [2021-07-13 19:28:18,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:28:18,991 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-07-13 19:28:18,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:28:18,992 INFO L225 Difference]: With dead ends: 82 [2021-07-13 19:28:18,992 INFO L226 Difference]: Without dead ends: 82 [2021-07-13 19:28:18,992 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 82.4ms TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:28:18,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-07-13 19:28:18,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 52. [2021-07-13 19:28:18,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 2.0784313725490198) internal successors, (106), 51 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:28:18,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 106 transitions. [2021-07-13 19:28:18,993 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 106 transitions. Word has length 13 [2021-07-13 19:28:18,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:28:18,993 INFO L482 AbstractCegarLoop]: Abstraction has 52 states and 106 transitions. [2021-07-13 19:28:18,993 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:28:18,994 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 106 transitions. [2021-07-13 19:28:18,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-07-13 19:28:18,994 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:28:18,994 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:28:19,194 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable218,42 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:28:19,195 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:28:19,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:28:19,195 INFO L82 PathProgramCache]: Analyzing trace with hash -127183706, now seen corresponding path program 38 times [2021-07-13 19:28:19,195 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:28:19,195 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697258847] [2021-07-13 19:28:19,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:28:19,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:28:19,650 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:28:19,650 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:28:19,650 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697258847] [2021-07-13 19:28:19,650 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1697258847] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:28:19,650 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1368661489] [2021-07-13 19:28:19,651 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:28:19,682 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:28:19,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:28:19,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 19:28:19,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:28:20,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:28:20,016 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:20,017 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 26 [2021-07-13 19:28:20,018 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:28:20,035 INFO L628 ElimStorePlain]: treesize reduction 111, result has 9.0 percent of original size [2021-07-13 19:28:20,035 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:28:20,035 INFO L518 ElimStorePlain]: Eliminatee v_prenex_23 vanished before elimination [2021-07-13 19:28:20,035 INFO L518 ElimStorePlain]: Eliminatee v_prenex_22 vanished before elimination [2021-07-13 19:28:20,035 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:28:20,035 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:140, output treesize:11 [2021-07-13 19:28:20,068 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:28:20,068 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1368661489] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:28:20,068 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:28:20,068 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 14 [2021-07-13 19:28:20,068 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315167134] [2021-07-13 19:28:20,068 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:28:20,068 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:28:20,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:28:20,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:28:20,069 INFO L87 Difference]: Start difference. First operand 52 states and 106 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:28:21,005 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 69 [2021-07-13 19:28:21,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:28:21,033 INFO L93 Difference]: Finished difference Result 111 states and 206 transitions. [2021-07-13 19:28:21,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:28:21,034 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-07-13 19:28:21,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:28:21,034 INFO L225 Difference]: With dead ends: 111 [2021-07-13 19:28:21,034 INFO L226 Difference]: Without dead ends: 108 [2021-07-13 19:28:21,034 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 8 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 1358.7ms TimeCoverageRelationStatistics Valid=98, Invalid=454, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:28:21,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-07-13 19:28:21,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 62. [2021-07-13 19:28:21,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 2.1147540983606556) internal successors, (129), 61 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:28:21,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 129 transitions. [2021-07-13 19:28:21,036 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 129 transitions. Word has length 14 [2021-07-13 19:28:21,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:28:21,036 INFO L482 AbstractCegarLoop]: Abstraction has 62 states and 129 transitions. [2021-07-13 19:28:21,036 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:28:21,036 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 129 transitions. [2021-07-13 19:28:21,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-07-13 19:28:21,036 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:28:21,036 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:28:21,237 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable220,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:28:21,237 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:28:21,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:28:21,237 INFO L82 PathProgramCache]: Analyzing trace with hash -1602893270, now seen corresponding path program 39 times [2021-07-13 19:28:21,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:28:21,238 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360946988] [2021-07-13 19:28:21,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:28:21,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:28:21,504 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:28:21,504 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:28:21,504 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360946988] [2021-07-13 19:28:21,504 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1360946988] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:28:21,504 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1200127177] [2021-07-13 19:28:21,504 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:28:21,531 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:28:21,532 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:28:21,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 19:28:21,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:28:21,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:28:21,901 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:21,903 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:21,906 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 24 [2021-07-13 19:28:21,907 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:28:21,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:28:21,911 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:21,912 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:21,913 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 32 [2021-07-13 19:28:21,914 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:28:21,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:28:21,917 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:21,919 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:21,919 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 24 [2021-07-13 19:28:21,920 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:28:21,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:28:21,923 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:21,924 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-07-13 19:28:21,925 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:28:21,941 INFO L628 ElimStorePlain]: treesize reduction 83, result has 15.3 percent of original size [2021-07-13 19:28:21,941 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:28:21,942 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:28:21,942 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:161, output treesize:11 [2021-07-13 19:28:21,950 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:28:21,950 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1200127177] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:28:21,950 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:28:21,950 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-07-13 19:28:21,950 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589507711] [2021-07-13 19:28:21,950 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:28:21,950 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:28:21,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:28:21,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:28:21,951 INFO L87 Difference]: Start difference. First operand 62 states and 129 transitions. Second operand has 13 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 13 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:28:22,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:28:22,631 INFO L93 Difference]: Finished difference Result 118 states and 238 transitions. [2021-07-13 19:28:22,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 19:28:22,632 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 13 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-07-13 19:28:22,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:28:22,633 INFO L225 Difference]: With dead ends: 118 [2021-07-13 19:28:22,633 INFO L226 Difference]: Without dead ends: 110 [2021-07-13 19:28:22,633 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 924.4ms TimeCoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:28:22,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-07-13 19:28:22,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 79. [2021-07-13 19:28:22,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 2.282051282051282) internal successors, (178), 78 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:28:22,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 178 transitions. [2021-07-13 19:28:22,635 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 178 transitions. Word has length 14 [2021-07-13 19:28:22,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:28:22,635 INFO L482 AbstractCegarLoop]: Abstraction has 79 states and 178 transitions. [2021-07-13 19:28:22,635 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 13 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:28:22,635 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 178 transitions. [2021-07-13 19:28:22,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-07-13 19:28:22,636 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:28:22,636 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:28:22,845 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable233 [2021-07-13 19:28:22,845 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:28:22,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:28:22,845 INFO L82 PathProgramCache]: Analyzing trace with hash -1595162872, now seen corresponding path program 40 times [2021-07-13 19:28:22,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:28:22,845 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436244007] [2021-07-13 19:28:22,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:28:22,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:28:22,986 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:28:22,986 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:28:22,986 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436244007] [2021-07-13 19:28:22,987 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1436244007] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:28:22,987 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1542961602] [2021-07-13 19:28:22,987 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:28:23,012 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:28:23,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:28:23,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 19:28:23,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:28:23,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:28:23,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:28:23,317 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:23,318 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:23,319 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 26 [2021-07-13 19:28:23,320 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:28:23,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:28:23,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:28:23,323 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:23,324 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2021-07-13 19:28:23,325 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:28:23,336 INFO L628 ElimStorePlain]: treesize reduction 90, result has 10.9 percent of original size [2021-07-13 19:28:23,336 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:28:23,336 INFO L518 ElimStorePlain]: Eliminatee v_prenex_25 vanished before elimination [2021-07-13 19:28:23,336 INFO L518 ElimStorePlain]: Eliminatee v_prenex_26 vanished before elimination [2021-07-13 19:28:23,336 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:28:23,336 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 6 variables, input treesize:140, output treesize:11 [2021-07-13 19:28:23,350 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:28:23,350 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1542961602] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:28:23,350 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:28:23,350 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-07-13 19:28:23,350 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789165474] [2021-07-13 19:28:23,351 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:28:23,351 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:28:23,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:28:23,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:28:23,351 INFO L87 Difference]: Start difference. First operand 79 states and 178 transitions. Second operand has 12 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:28:23,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:28:23,766 INFO L93 Difference]: Finished difference Result 108 states and 232 transitions. [2021-07-13 19:28:23,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:28:23,767 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-07-13 19:28:23,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:28:23,767 INFO L225 Difference]: With dead ends: 108 [2021-07-13 19:28:23,767 INFO L226 Difference]: Without dead ends: 104 [2021-07-13 19:28:23,767 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 591.2ms TimeCoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:28:23,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-07-13 19:28:23,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 86. [2021-07-13 19:28:23,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 2.3294117647058825) internal successors, (198), 85 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:28:23,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 198 transitions. [2021-07-13 19:28:23,769 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 198 transitions. Word has length 14 [2021-07-13 19:28:23,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:28:23,769 INFO L482 AbstractCegarLoop]: Abstraction has 86 states and 198 transitions. [2021-07-13 19:28:23,769 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:28:23,770 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 198 transitions. [2021-07-13 19:28:23,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-07-13 19:28:23,770 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:28:23,770 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:28:23,986 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable259 [2021-07-13 19:28:23,986 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:28:23,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:28:23,986 INFO L82 PathProgramCache]: Analyzing trace with hash 1210399428, now seen corresponding path program 41 times [2021-07-13 19:28:23,986 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:28:23,987 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727012057] [2021-07-13 19:28:23,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:28:23,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:28:24,126 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:28:24,126 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:28:24,126 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727012057] [2021-07-13 19:28:24,126 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1727012057] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:28:24,126 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1313111314] [2021-07-13 19:28:24,126 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:28:24,151 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:28:24,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:28:24,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 19:28:24,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:28:24,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:28:24,404 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:24,405 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:24,405 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 26 [2021-07-13 19:28:24,406 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:28:24,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:28:24,410 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:24,410 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2021-07-13 19:28:24,412 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:28:24,424 INFO L628 ElimStorePlain]: treesize reduction 88, result has 11.1 percent of original size [2021-07-13 19:28:24,424 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:28:24,424 INFO L518 ElimStorePlain]: Eliminatee v_prenex_31 vanished before elimination [2021-07-13 19:28:24,424 INFO L518 ElimStorePlain]: Eliminatee v_prenex_30 vanished before elimination [2021-07-13 19:28:24,424 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:28:24,425 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 6 variables, input treesize:140, output treesize:11 [2021-07-13 19:28:24,435 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:28:24,435 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1313111314] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:28:24,435 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:28:24,435 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-07-13 19:28:24,435 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502123400] [2021-07-13 19:28:24,435 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:28:24,435 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:28:24,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:28:24,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:28:24,436 INFO L87 Difference]: Start difference. First operand 86 states and 198 transitions. Second operand has 12 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:28:24,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:28:24,803 INFO L93 Difference]: Finished difference Result 104 states and 232 transitions. [2021-07-13 19:28:24,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:28:24,804 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-07-13 19:28:24,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:28:24,804 INFO L225 Difference]: With dead ends: 104 [2021-07-13 19:28:24,804 INFO L226 Difference]: Without dead ends: 101 [2021-07-13 19:28:24,804 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 501.4ms TimeCoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:28:24,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-07-13 19:28:24,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 86. [2021-07-13 19:28:24,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 2.3294117647058825) internal successors, (198), 85 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:28:24,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 198 transitions. [2021-07-13 19:28:24,806 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 198 transitions. Word has length 14 [2021-07-13 19:28:24,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:28:24,806 INFO L482 AbstractCegarLoop]: Abstraction has 86 states and 198 transitions. [2021-07-13 19:28:24,806 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:28:24,806 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 198 transitions. [2021-07-13 19:28:24,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-07-13 19:28:24,807 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:28:24,807 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:28:25,020 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable273,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:28:25,021 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:28:25,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:28:25,021 INFO L82 PathProgramCache]: Analyzing trace with hash -221091546, now seen corresponding path program 42 times [2021-07-13 19:28:25,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:28:25,021 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454012974] [2021-07-13 19:28:25,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:28:25,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:28:25,204 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:28:25,205 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:28:25,205 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454012974] [2021-07-13 19:28:25,205 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [454012974] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:28:25,205 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1569556644] [2021-07-13 19:28:25,205 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:28:25,229 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-13 19:28:25,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:28:25,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 19:28:25,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:28:25,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:28:25,452 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:25,454 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:25,455 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 24 [2021-07-13 19:28:25,456 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:28:25,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:28:25,459 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:25,460 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:25,461 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 26 [2021-07-13 19:28:25,462 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:28:25,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:28:25,465 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:25,465 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 24 [2021-07-13 19:28:25,467 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:28:25,477 INFO L628 ElimStorePlain]: treesize reduction 66, result has 14.3 percent of original size [2021-07-13 19:28:25,477 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:28:25,478 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:28:25,478 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:128, output treesize:11 [2021-07-13 19:28:25,499 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:28:25,499 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1569556644] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:28:25,499 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:28:25,499 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 14 [2021-07-13 19:28:25,499 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027813074] [2021-07-13 19:28:25,500 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:28:25,500 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:28:25,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:28:25,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:28:25,500 INFO L87 Difference]: Start difference. First operand 86 states and 198 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:28:25,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:28:25,749 INFO L93 Difference]: Finished difference Result 99 states and 223 transitions. [2021-07-13 19:28:25,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-13 19:28:25,749 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-07-13 19:28:25,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:28:25,750 INFO L225 Difference]: With dead ends: 99 [2021-07-13 19:28:25,750 INFO L226 Difference]: Without dead ends: 96 [2021-07-13 19:28:25,750 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 434.3ms TimeCoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:28:25,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-07-13 19:28:25,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 88. [2021-07-13 19:28:25,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 87 states have (on average 2.32183908045977) internal successors, (202), 87 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:28:25,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 202 transitions. [2021-07-13 19:28:25,751 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 202 transitions. Word has length 14 [2021-07-13 19:28:25,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:28:25,752 INFO L482 AbstractCegarLoop]: Abstraction has 88 states and 202 transitions. [2021-07-13 19:28:25,752 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:28:25,752 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 202 transitions. [2021-07-13 19:28:25,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-07-13 19:28:25,752 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:28:25,752 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:28:25,965 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable286 [2021-07-13 19:28:25,965 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:28:25,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:28:25,965 INFO L82 PathProgramCache]: Analyzing trace with hash 26281190, now seen corresponding path program 43 times [2021-07-13 19:28:25,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:28:25,965 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556463085] [2021-07-13 19:28:25,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:28:25,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:28:26,096 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:28:26,096 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:28:26,096 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556463085] [2021-07-13 19:28:26,096 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1556463085] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:28:26,096 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1349117544] [2021-07-13 19:28:26,096 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:28:26,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:28:26,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 19:28:26,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:28:26,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:28:26,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:28:26,435 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:26,435 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 26 [2021-07-13 19:28:26,436 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:28:26,452 INFO L628 ElimStorePlain]: treesize reduction 107, result has 9.3 percent of original size [2021-07-13 19:28:26,452 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:28:26,452 INFO L518 ElimStorePlain]: Eliminatee v_prenex_34 vanished before elimination [2021-07-13 19:28:26,452 INFO L518 ElimStorePlain]: Eliminatee v_prenex_33 vanished before elimination [2021-07-13 19:28:26,452 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:28:26,452 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:140, output treesize:11 [2021-07-13 19:28:26,461 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:28:26,462 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1349117544] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:28:26,462 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:28:26,462 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-07-13 19:28:26,462 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255775987] [2021-07-13 19:28:26,462 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:28:26,462 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:28:26,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:28:26,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:28:26,462 INFO L87 Difference]: Start difference. First operand 88 states and 202 transitions. Second operand has 12 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:28:26,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:28:26,673 INFO L93 Difference]: Finished difference Result 145 states and 308 transitions. [2021-07-13 19:28:26,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:28:26,674 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-07-13 19:28:26,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:28:26,674 INFO L225 Difference]: With dead ends: 145 [2021-07-13 19:28:26,674 INFO L226 Difference]: Without dead ends: 142 [2021-07-13 19:28:26,674 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 394.5ms TimeCoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:28:26,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-07-13 19:28:26,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 99. [2021-07-13 19:28:26,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 2.4693877551020407) internal successors, (242), 98 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:28:26,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 242 transitions. [2021-07-13 19:28:26,676 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 242 transitions. Word has length 14 [2021-07-13 19:28:26,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:28:26,677 INFO L482 AbstractCegarLoop]: Abstraction has 99 states and 242 transitions. [2021-07-13 19:28:26,677 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:28:26,677 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 242 transitions. [2021-07-13 19:28:26,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-07-13 19:28:26,677 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:28:26,677 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:28:26,892 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable305,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:28:26,892 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:28:26,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:28:26,892 INFO L82 PathProgramCache]: Analyzing trace with hash -390038426, now seen corresponding path program 44 times [2021-07-13 19:28:26,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:28:26,893 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668552416] [2021-07-13 19:28:26,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:28:26,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:28:27,037 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:28:27,037 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:28:27,037 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668552416] [2021-07-13 19:28:27,037 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [668552416] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:28:27,037 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [339621233] [2021-07-13 19:28:27,037 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:28:27,061 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:28:27,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:28:27,062 WARN L261 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:28:27,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:28:27,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:28:27,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:28:27,273 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:27,275 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:27,275 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 34 [2021-07-13 19:28:27,277 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:28:27,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:28:27,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:28:27,282 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:27,284 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:27,284 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 26 [2021-07-13 19:28:27,285 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:28:27,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:28:27,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:28:27,292 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:27,293 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:27,294 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 18 [2021-07-13 19:28:27,295 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:28:27,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:28:27,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:28:27,299 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:27,299 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 26 [2021-07-13 19:28:27,300 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:28:27,355 INFO L628 ElimStorePlain]: treesize reduction 99, result has 40.4 percent of original size [2021-07-13 19:28:27,357 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:27,358 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-13 19:28:27,365 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-13 19:28:27,389 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:28:27,391 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:28:27,391 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 2 variables, input treesize:245, output treesize:62 [2021-07-13 19:28:27,459 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:28:27,459 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [339621233] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:28:27,459 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:28:27,459 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-07-13 19:28:27,459 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582265021] [2021-07-13 19:28:27,459 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:28:27,459 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:28:27,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:28:27,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:28:27,460 INFO L87 Difference]: Start difference. First operand 99 states and 242 transitions. Second operand has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 13 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:28:27,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:28:27,696 INFO L93 Difference]: Finished difference Result 161 states and 353 transitions. [2021-07-13 19:28:27,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:28:27,696 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 13 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-07-13 19:28:27,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:28:27,697 INFO L225 Difference]: With dead ends: 161 [2021-07-13 19:28:27,697 INFO L226 Difference]: Without dead ends: 155 [2021-07-13 19:28:27,697 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 437.2ms TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:28:27,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2021-07-13 19:28:27,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 112. [2021-07-13 19:28:27,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 2.5315315315315314) internal successors, (281), 111 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:28:27,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 281 transitions. [2021-07-13 19:28:27,699 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 281 transitions. Word has length 14 [2021-07-13 19:28:27,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:28:27,699 INFO L482 AbstractCegarLoop]: Abstraction has 112 states and 281 transitions. [2021-07-13 19:28:27,699 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 13 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:28:27,699 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 281 transitions. [2021-07-13 19:28:27,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-07-13 19:28:27,700 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:28:27,700 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:28:27,910 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable320 [2021-07-13 19:28:27,910 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:28:27,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:28:27,911 INFO L82 PathProgramCache]: Analyzing trace with hash 732601002, now seen corresponding path program 45 times [2021-07-13 19:28:27,911 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:28:27,911 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856812861] [2021-07-13 19:28:27,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:28:27,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:28:28,323 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:28:28,324 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:28:28,324 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856812861] [2021-07-13 19:28:28,324 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [856812861] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:28:28,324 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1907826467] [2021-07-13 19:28:28,324 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:28:28,349 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-13 19:28:28,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:28:28,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 19:28:28,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:28:28,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:28:28,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:28:28,644 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:28,646 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:28,646 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 26 [2021-07-13 19:28:28,647 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:28:28,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:28:28,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:28:28,652 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:28,652 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2021-07-13 19:28:28,653 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:28:28,687 INFO L628 ElimStorePlain]: treesize reduction 69, result has 50.0 percent of original size [2021-07-13 19:28:28,690 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:28,690 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-13 19:28:28,691 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:28:28,704 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:28:28,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:28:28,707 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:28:28,708 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:28:28,718 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:28:28,719 INFO L518 ElimStorePlain]: Eliminatee v_prenex_39 vanished before elimination [2021-07-13 19:28:28,720 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:28:28,720 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:177, output treesize:22 [2021-07-13 19:28:28,750 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:28:28,751 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1907826467] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:28:28,751 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:28:28,751 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 15 [2021-07-13 19:28:28,751 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139592480] [2021-07-13 19:28:28,751 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:28:28,751 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:28:28,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:28:28,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:28:28,751 INFO L87 Difference]: Start difference. First operand 112 states and 281 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:28:29,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:28:29,386 INFO L93 Difference]: Finished difference Result 178 states and 428 transitions. [2021-07-13 19:28:29,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:28:29,386 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-07-13 19:28:29,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:28:29,387 INFO L225 Difference]: With dead ends: 178 [2021-07-13 19:28:29,387 INFO L226 Difference]: Without dead ends: 175 [2021-07-13 19:28:29,387 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 978.8ms TimeCoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:28:29,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2021-07-13 19:28:29,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 114. [2021-07-13 19:28:29,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 2.52212389380531) internal successors, (285), 113 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:28:29,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 285 transitions. [2021-07-13 19:28:29,390 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 285 transitions. Word has length 14 [2021-07-13 19:28:29,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:28:29,390 INFO L482 AbstractCegarLoop]: Abstraction has 114 states and 285 transitions. [2021-07-13 19:28:29,390 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:28:29,390 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 285 transitions. [2021-07-13 19:28:29,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-07-13 19:28:29,390 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:28:29,390 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:28:29,605 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable328,50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:28:29,605 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:28:29,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:28:29,605 INFO L82 PathProgramCache]: Analyzing trace with hash -844740728, now seen corresponding path program 46 times [2021-07-13 19:28:29,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:28:29,605 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266523803] [2021-07-13 19:28:29,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:28:29,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:28:29,720 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:28:29,721 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:28:29,721 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266523803] [2021-07-13 19:28:29,721 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [266523803] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:28:29,721 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [246383263] [2021-07-13 19:28:29,721 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:28:29,748 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:28:29,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:28:29,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 19:28:29,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:28:30,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:28:30,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:28:30,033 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:30,034 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 26 [2021-07-13 19:28:30,035 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:28:30,051 INFO L628 ElimStorePlain]: treesize reduction 107, result has 9.3 percent of original size [2021-07-13 19:28:30,051 INFO L518 ElimStorePlain]: Eliminatee v_prenex_43 vanished before elimination [2021-07-13 19:28:30,051 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:28:30,051 INFO L518 ElimStorePlain]: Eliminatee v_prenex_44 vanished before elimination [2021-07-13 19:28:30,052 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:28:30,052 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:140, output treesize:11 [2021-07-13 19:28:30,074 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:28:30,074 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [246383263] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:28:30,074 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:28:30,074 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 14 [2021-07-13 19:28:30,074 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536917653] [2021-07-13 19:28:30,074 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:28:30,074 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:28:30,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:28:30,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:28:30,075 INFO L87 Difference]: Start difference. First operand 114 states and 285 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:28:30,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:28:30,359 INFO L93 Difference]: Finished difference Result 140 states and 336 transitions. [2021-07-13 19:28:30,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:28:30,359 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-07-13 19:28:30,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:28:30,360 INFO L225 Difference]: With dead ends: 140 [2021-07-13 19:28:30,360 INFO L226 Difference]: Without dead ends: 137 [2021-07-13 19:28:30,360 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 418.4ms TimeCoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:28:30,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-07-13 19:28:30,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 114. [2021-07-13 19:28:30,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 2.52212389380531) internal successors, (285), 113 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:28:30,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 285 transitions. [2021-07-13 19:28:30,363 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 285 transitions. Word has length 14 [2021-07-13 19:28:30,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:28:30,363 INFO L482 AbstractCegarLoop]: Abstraction has 114 states and 285 transitions. [2021-07-13 19:28:30,363 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:28:30,363 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 285 transitions. [2021-07-13 19:28:30,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-07-13 19:28:30,363 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:28:30,363 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:28:30,564 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable339,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:28:30,564 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:28:30,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:28:30,564 INFO L82 PathProgramCache]: Analyzing trace with hash -605098390, now seen corresponding path program 47 times [2021-07-13 19:28:30,564 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:28:30,565 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239041893] [2021-07-13 19:28:30,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:28:30,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:28:30,712 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:28:30,712 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:28:30,712 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239041893] [2021-07-13 19:28:30,712 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [239041893] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:28:30,712 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [44790814] [2021-07-13 19:28:30,712 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:28:30,738 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:28:30,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:28:30,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 19:28:30,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:28:31,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:28:31,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:28:31,093 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:31,093 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 26 [2021-07-13 19:28:31,095 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:28:31,111 INFO L628 ElimStorePlain]: treesize reduction 107, result has 9.3 percent of original size [2021-07-13 19:28:31,111 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:28:31,111 INFO L518 ElimStorePlain]: Eliminatee v_prenex_47 vanished before elimination [2021-07-13 19:28:31,111 INFO L518 ElimStorePlain]: Eliminatee v_prenex_46 vanished before elimination [2021-07-13 19:28:31,111 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:28:31,111 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:140, output treesize:11 [2021-07-13 19:28:31,119 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:28:31,120 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [44790814] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:28:31,120 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:28:31,120 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-07-13 19:28:31,120 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202092302] [2021-07-13 19:28:31,120 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:28:31,120 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:28:31,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:28:31,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:28:31,120 INFO L87 Difference]: Start difference. First operand 114 states and 285 transitions. Second operand has 13 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 13 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:28:31,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:28:31,564 INFO L93 Difference]: Finished difference Result 149 states and 349 transitions. [2021-07-13 19:28:31,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:28:31,565 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 13 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-07-13 19:28:31,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:28:31,565 INFO L225 Difference]: With dead ends: 149 [2021-07-13 19:28:31,565 INFO L226 Difference]: Without dead ends: 144 [2021-07-13 19:28:31,565 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 693.7ms TimeCoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:28:31,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-07-13 19:28:31,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 116. [2021-07-13 19:28:31,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 115 states have (on average 2.5478260869565217) internal successors, (293), 115 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:28:31,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 293 transitions. [2021-07-13 19:28:31,567 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 293 transitions. Word has length 14 [2021-07-13 19:28:31,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:28:31,568 INFO L482 AbstractCegarLoop]: Abstraction has 116 states and 293 transitions. [2021-07-13 19:28:31,568 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 13 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:28:31,568 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 293 transitions. [2021-07-13 19:28:31,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-07-13 19:28:31,568 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:28:31,568 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:28:31,780 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable353 [2021-07-13 19:28:31,781 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:28:31,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:28:31,781 INFO L82 PathProgramCache]: Analyzing trace with hash -597367992, now seen corresponding path program 48 times [2021-07-13 19:28:31,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:28:31,781 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993104136] [2021-07-13 19:28:31,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:28:31,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:28:31,908 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:28:31,908 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:28:31,909 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993104136] [2021-07-13 19:28:31,909 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [993104136] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:28:31,909 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1605697739] [2021-07-13 19:28:31,909 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:28:31,940 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:28:31,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:28:31,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 19:28:31,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:28:32,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:28:32,222 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:32,223 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:32,223 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 24 [2021-07-13 19:28:32,224 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:28:32,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:28:32,227 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:32,229 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:32,230 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 26 [2021-07-13 19:28:32,231 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:28:32,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:28:32,234 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:32,235 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 24 [2021-07-13 19:28:32,236 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:28:32,247 INFO L628 ElimStorePlain]: treesize reduction 70, result has 13.6 percent of original size [2021-07-13 19:28:32,247 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:28:32,248 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:28:32,248 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:128, output treesize:11 [2021-07-13 19:28:32,269 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:28:32,269 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1605697739] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:28:32,269 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:28:32,269 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-07-13 19:28:32,269 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672618615] [2021-07-13 19:28:32,269 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:28:32,269 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:28:32,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:28:32,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:28:32,270 INFO L87 Difference]: Start difference. First operand 116 states and 293 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:28:32,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:28:32,777 INFO L93 Difference]: Finished difference Result 179 states and 405 transitions. [2021-07-13 19:28:32,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:28:32,778 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-07-13 19:28:32,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:28:32,778 INFO L225 Difference]: With dead ends: 179 [2021-07-13 19:28:32,778 INFO L226 Difference]: Without dead ends: 175 [2021-07-13 19:28:32,778 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 633.5ms TimeCoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:28:32,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2021-07-13 19:28:32,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 115. [2021-07-13 19:28:32,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 2.5526315789473686) internal successors, (291), 114 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:28:32,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 291 transitions. [2021-07-13 19:28:32,781 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 291 transitions. Word has length 14 [2021-07-13 19:28:32,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:28:32,781 INFO L482 AbstractCegarLoop]: Abstraction has 115 states and 291 transitions. [2021-07-13 19:28:32,781 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:28:32,781 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 291 transitions. [2021-07-13 19:28:32,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-07-13 19:28:32,781 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:28:32,781 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:28:32,992 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable367 [2021-07-13 19:28:32,993 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:28:32,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:28:32,993 INFO L82 PathProgramCache]: Analyzing trace with hash 1262043392, now seen corresponding path program 49 times [2021-07-13 19:28:32,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:28:32,993 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679017728] [2021-07-13 19:28:32,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:28:32,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:28:33,160 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:28:33,161 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:28:33,161 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679017728] [2021-07-13 19:28:33,161 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1679017728] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:28:33,161 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1125198769] [2021-07-13 19:28:33,161 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:28:33,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:28:33,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 19:28:33,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:28:33,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:28:33,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:28:33,489 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:33,491 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:33,492 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2021-07-13 19:28:33,493 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:28:33,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:28:33,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:28:33,498 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:33,498 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 26 [2021-07-13 19:28:33,499 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:28:33,511 INFO L628 ElimStorePlain]: treesize reduction 90, result has 10.9 percent of original size [2021-07-13 19:28:33,511 INFO L518 ElimStorePlain]: Eliminatee v_prenex_54 vanished before elimination [2021-07-13 19:28:33,511 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:28:33,511 INFO L518 ElimStorePlain]: Eliminatee v_prenex_53 vanished before elimination [2021-07-13 19:28:33,512 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:28:33,512 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 6 variables, input treesize:140, output treesize:11 [2021-07-13 19:28:33,536 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:28:33,536 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1125198769] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:28:33,536 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:28:33,536 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 14 [2021-07-13 19:28:33,536 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742800588] [2021-07-13 19:28:33,536 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:28:33,537 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:28:33,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:28:33,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:28:33,537 INFO L87 Difference]: Start difference. First operand 115 states and 291 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:28:33,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:28:33,781 INFO L93 Difference]: Finished difference Result 131 states and 321 transitions. [2021-07-13 19:28:33,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-13 19:28:33,781 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-07-13 19:28:33,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:28:33,782 INFO L225 Difference]: With dead ends: 131 [2021-07-13 19:28:33,782 INFO L226 Difference]: Without dead ends: 128 [2021-07-13 19:28:33,782 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 473.6ms TimeCoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:28:33,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-07-13 19:28:33,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 115. [2021-07-13 19:28:33,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 2.5526315789473686) internal successors, (291), 114 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:28:33,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 291 transitions. [2021-07-13 19:28:33,784 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 291 transitions. Word has length 14 [2021-07-13 19:28:33,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:28:33,784 INFO L482 AbstractCegarLoop]: Abstraction has 115 states and 291 transitions. [2021-07-13 19:28:33,784 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:28:33,784 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 291 transitions. [2021-07-13 19:28:33,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-07-13 19:28:33,784 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:28:33,784 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:28:33,988 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable386 [2021-07-13 19:28:33,989 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:28:33,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:28:33,989 INFO L82 PathProgramCache]: Analyzing trace with hash -1720196186, now seen corresponding path program 50 times [2021-07-13 19:28:33,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:28:33,989 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232526252] [2021-07-13 19:28:33,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:28:33,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:28:34,274 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:28:34,274 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:28:34,274 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232526252] [2021-07-13 19:28:34,274 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1232526252] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:28:34,274 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1291553122] [2021-07-13 19:28:34,274 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:28:34,298 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:28:34,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:28:34,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 19:28:34,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:28:34,480 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 43 [2021-07-13 19:28:34,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:28:34,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:28:34,667 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:34,669 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:34,669 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 18 [2021-07-13 19:28:34,670 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:28:34,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:28:34,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:28:34,674 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:34,675 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 26 [2021-07-13 19:28:34,676 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:28:34,712 INFO L628 ElimStorePlain]: treesize reduction 69, result has 46.5 percent of original size [2021-07-13 19:28:34,712 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:28:34,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:28:34,715 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:34,715 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2021-07-13 19:28:34,717 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:28:34,727 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:28:34,730 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:34,730 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-13 19:28:34,732 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-13 19:28:34,742 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:28:34,743 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:28:34,744 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:169, output treesize:22 [2021-07-13 19:28:34,776 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:28:34,776 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1291553122] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:28:34,777 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:28:34,777 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 15 [2021-07-13 19:28:34,777 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15527588] [2021-07-13 19:28:34,777 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:28:34,777 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:28:34,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:28:34,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:28:34,778 INFO L87 Difference]: Start difference. First operand 115 states and 291 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:28:35,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:28:35,390 INFO L93 Difference]: Finished difference Result 144 states and 342 transitions. [2021-07-13 19:28:35,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:28:35,390 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-07-13 19:28:35,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:28:35,391 INFO L225 Difference]: With dead ends: 144 [2021-07-13 19:28:35,391 INFO L226 Difference]: Without dead ends: 141 [2021-07-13 19:28:35,391 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 981.6ms TimeCoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:28:35,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-07-13 19:28:35,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 118. [2021-07-13 19:28:35,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 117 states have (on average 2.5641025641025643) internal successors, (300), 117 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:28:35,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 300 transitions. [2021-07-13 19:28:35,394 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 300 transitions. Word has length 14 [2021-07-13 19:28:35,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:28:35,394 INFO L482 AbstractCegarLoop]: Abstraction has 118 states and 300 transitions. [2021-07-13 19:28:35,394 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:28:35,394 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 300 transitions. [2021-07-13 19:28:35,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-07-13 19:28:35,394 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:28:35,394 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:28:35,598 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable399 [2021-07-13 19:28:35,598 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:28:35,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:28:35,599 INFO L82 PathProgramCache]: Analyzing trace with hash 1093096512, now seen corresponding path program 51 times [2021-07-13 19:28:35,599 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:28:35,599 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446983818] [2021-07-13 19:28:35,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:28:35,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:28:35,753 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:28:35,753 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:28:35,753 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446983818] [2021-07-13 19:28:35,753 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [446983818] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:28:35,753 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [722301676] [2021-07-13 19:28:35,753 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:28:35,782 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:28:35,783 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:28:35,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 19:28:35,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:28:35,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:28:35,988 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:35,989 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:35,989 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 24 [2021-07-13 19:28:35,990 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:28:35,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:28:35,993 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:35,994 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:35,994 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 26 [2021-07-13 19:28:35,995 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:28:35,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:28:35,998 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:35,999 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 24 [2021-07-13 19:28:36,000 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:28:36,011 INFO L628 ElimStorePlain]: treesize reduction 66, result has 14.3 percent of original size [2021-07-13 19:28:36,011 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:28:36,012 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:28:36,012 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:128, output treesize:11 [2021-07-13 19:28:36,021 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:28:36,021 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [722301676] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:28:36,021 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:28:36,021 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-07-13 19:28:36,021 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954058261] [2021-07-13 19:28:36,021 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:28:36,022 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:28:36,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:28:36,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:28:36,022 INFO L87 Difference]: Start difference. First operand 118 states and 300 transitions. Second operand has 12 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:28:36,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:28:36,358 INFO L93 Difference]: Finished difference Result 173 states and 397 transitions. [2021-07-13 19:28:36,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:28:36,359 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-07-13 19:28:36,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:28:36,359 INFO L225 Difference]: With dead ends: 173 [2021-07-13 19:28:36,359 INFO L226 Difference]: Without dead ends: 170 [2021-07-13 19:28:36,359 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 437.1ms TimeCoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:28:36,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2021-07-13 19:28:36,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 116. [2021-07-13 19:28:36,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 115 states have (on average 2.5565217391304347) internal successors, (294), 115 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:28:36,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 294 transitions. [2021-07-13 19:28:36,362 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 294 transitions. Word has length 14 [2021-07-13 19:28:36,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:28:36,362 INFO L482 AbstractCegarLoop]: Abstraction has 116 states and 294 transitions. [2021-07-13 19:28:36,362 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:28:36,362 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 294 transitions. [2021-07-13 19:28:36,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-13 19:28:36,362 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:28:36,362 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:28:36,569 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable414,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:28:36,569 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:28:36,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:28:36,569 INFO L82 PathProgramCache]: Analyzing trace with hash 351187404, now seen corresponding path program 52 times [2021-07-13 19:28:36,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:28:36,569 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553362984] [2021-07-13 19:28:36,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:28:36,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:28:36,631 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:28:36,631 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:28:36,631 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553362984] [2021-07-13 19:28:36,631 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1553362984] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:28:36,631 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1695522835] [2021-07-13 19:28:36,631 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:28:36,656 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:28:36,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:28:36,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-13 19:28:36,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:28:36,736 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:28:36,737 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:28:36,740 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:36,740 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:28:36,741 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:28:36,743 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:28:36,744 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:28:36,746 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:36,746 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:28:36,747 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:28:36,749 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:28:36,750 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:28:36,751 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:28:36,752 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:28:36,775 INFO L628 ElimStorePlain]: treesize reduction 26, result has 43.5 percent of original size [2021-07-13 19:28:36,775 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:28:36,775 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:28:36,776 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 2 variables, input treesize:107, output treesize:20 [2021-07-13 19:28:36,798 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:28:36,799 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1695522835] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:28:36,799 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:28:36,799 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:28:36,799 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284122105] [2021-07-13 19:28:36,799 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:28:36,799 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:28:36,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:28:36,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:28:36,799 INFO L87 Difference]: Start difference. First operand 116 states and 294 transitions. Second operand has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 13 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:28:37,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:28:37,030 INFO L93 Difference]: Finished difference Result 155 states and 375 transitions. [2021-07-13 19:28:37,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:28:37,031 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 13 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-13 19:28:37,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:28:37,031 INFO L225 Difference]: With dead ends: 155 [2021-07-13 19:28:37,031 INFO L226 Difference]: Without dead ends: 146 [2021-07-13 19:28:37,032 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 255.0ms TimeCoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:28:37,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-07-13 19:28:37,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 113. [2021-07-13 19:28:37,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 2.5714285714285716) internal successors, (288), 112 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:28:37,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 288 transitions. [2021-07-13 19:28:37,034 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 288 transitions. Word has length 15 [2021-07-13 19:28:37,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:28:37,034 INFO L482 AbstractCegarLoop]: Abstraction has 113 states and 288 transitions. [2021-07-13 19:28:37,034 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 13 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:28:37,034 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 288 transitions. [2021-07-13 19:28:37,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-13 19:28:37,034 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:28:37,034 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:28:37,240 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable432 [2021-07-13 19:28:37,240 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:28:37,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:28:37,241 INFO L82 PathProgramCache]: Analyzing trace with hash 1964128954, now seen corresponding path program 53 times [2021-07-13 19:28:37,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:28:37,241 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553280836] [2021-07-13 19:28:37,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:28:37,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:28:37,306 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:28:37,306 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:28:37,307 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553280836] [2021-07-13 19:28:37,307 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1553280836] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:28:37,307 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2142060006] [2021-07-13 19:28:37,307 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:28:37,335 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:28:37,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:28:37,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-13 19:28:37,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:28:37,423 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:37,424 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:28:37,425 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:28:37,426 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:28:37,427 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:28:37,441 INFO L628 ElimStorePlain]: treesize reduction 27, result has 30.8 percent of original size [2021-07-13 19:28:37,441 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:28:37,441 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:28:37,441 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:53, output treesize:12 [2021-07-13 19:28:37,458 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:28:37,458 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2142060006] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:28:37,458 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:28:37,458 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:28:37,458 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059390356] [2021-07-13 19:28:37,459 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:28:37,459 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:28:37,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:28:37,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:28:37,459 INFO L87 Difference]: Start difference. First operand 113 states and 288 transitions. Second operand has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 13 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:28:37,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:28:37,588 INFO L93 Difference]: Finished difference Result 155 states and 380 transitions. [2021-07-13 19:28:37,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:28:37,588 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 13 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-13 19:28:37,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:28:37,589 INFO L225 Difference]: With dead ends: 155 [2021-07-13 19:28:37,589 INFO L226 Difference]: Without dead ends: 155 [2021-07-13 19:28:37,589 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 147.1ms TimeCoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:28:37,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2021-07-13 19:28:37,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 114. [2021-07-13 19:28:37,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 2.575221238938053) internal successors, (291), 113 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:28:37,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 291 transitions. [2021-07-13 19:28:37,591 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 291 transitions. Word has length 15 [2021-07-13 19:28:37,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:28:37,591 INFO L482 AbstractCegarLoop]: Abstraction has 114 states and 291 transitions. [2021-07-13 19:28:37,591 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 13 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:28:37,591 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 291 transitions. [2021-07-13 19:28:37,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-13 19:28:37,592 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:28:37,592 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:28:37,808 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable438,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:28:37,808 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:28:37,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:28:37,809 INFO L82 PathProgramCache]: Analyzing trace with hash -313196838, now seen corresponding path program 54 times [2021-07-13 19:28:37,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:28:37,809 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272001209] [2021-07-13 19:28:37,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:28:37,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:28:37,895 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:28:37,896 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:28:37,896 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272001209] [2021-07-13 19:28:37,896 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1272001209] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:28:37,896 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [890621487] [2021-07-13 19:28:37,896 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:28:37,922 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:28:37,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:28:37,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-13 19:28:37,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:28:38,008 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:38,008 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:38,008 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:28:38,009 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:28:38,011 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:38,012 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:38,012 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:28:38,013 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:28:38,015 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:38,015 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:38,016 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:28:38,016 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:28:38,018 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:38,018 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:28:38,019 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:28:38,050 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-07-13 19:28:38,051 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:28:38,051 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:28:38,051 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-07-13 19:28:38,097 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:28:38,097 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [890621487] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:28:38,097 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:28:38,097 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:28:38,098 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362421688] [2021-07-13 19:28:38,098 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:28:38,098 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:28:38,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:28:38,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:28:38,098 INFO L87 Difference]: Start difference. First operand 114 states and 291 transitions. Second operand has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:28:38,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:28:38,410 INFO L93 Difference]: Finished difference Result 200 states and 455 transitions. [2021-07-13 19:28:38,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:28:38,410 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-13 19:28:38,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:28:38,411 INFO L225 Difference]: With dead ends: 200 [2021-07-13 19:28:38,411 INFO L226 Difference]: Without dead ends: 200 [2021-07-13 19:28:38,411 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 362.8ms TimeCoverageRelationStatistics Valid=80, Invalid=300, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:28:38,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2021-07-13 19:28:38,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 120. [2021-07-13 19:28:38,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 119 states have (on average 2.6218487394957983) internal successors, (312), 119 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:28:38,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 312 transitions. [2021-07-13 19:28:38,413 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 312 transitions. Word has length 15 [2021-07-13 19:28:38,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:28:38,414 INFO L482 AbstractCegarLoop]: Abstraction has 120 states and 312 transitions. [2021-07-13 19:28:38,414 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:28:38,414 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 312 transitions. [2021-07-13 19:28:38,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-13 19:28:38,414 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:28:38,414 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:28:38,624 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable440 [2021-07-13 19:28:38,625 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:28:38,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:28:38,625 INFO L82 PathProgramCache]: Analyzing trace with hash 488419390, now seen corresponding path program 55 times [2021-07-13 19:28:38,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:28:38,625 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255850019] [2021-07-13 19:28:38,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:28:38,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:28:38,700 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:28:38,700 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:28:38,701 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255850019] [2021-07-13 19:28:38,701 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1255850019] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:28:38,701 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1273255548] [2021-07-13 19:28:38,701 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:28:38,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:28:38,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-13 19:28:38,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:28:38,808 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:38,808 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:38,809 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:28:38,809 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:28:38,811 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:38,812 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:38,812 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:28:38,813 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:28:38,815 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:38,816 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:38,816 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:28:38,816 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:28:38,818 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:38,819 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:28:38,819 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:28:38,858 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-07-13 19:28:38,859 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:28:38,859 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:28:38,860 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-07-13 19:28:38,930 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:28:38,931 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1273255548] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:28:38,931 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:28:38,931 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:28:38,931 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520489544] [2021-07-13 19:28:38,931 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:28:38,931 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:28:38,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:28:38,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:28:38,931 INFO L87 Difference]: Start difference. First operand 120 states and 312 transitions. Second operand has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:28:39,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:28:39,645 INFO L93 Difference]: Finished difference Result 212 states and 477 transitions. [2021-07-13 19:28:39,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-13 19:28:39,645 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-13 19:28:39,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:28:39,646 INFO L225 Difference]: With dead ends: 212 [2021-07-13 19:28:39,646 INFO L226 Difference]: Without dead ends: 205 [2021-07-13 19:28:39,646 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 698.8ms TimeCoverageRelationStatistics Valid=155, Invalid=775, Unknown=0, NotChecked=0, Total=930 [2021-07-13 19:28:39,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2021-07-13 19:28:39,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 126. [2021-07-13 19:28:39,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 125 states have (on average 2.632) internal successors, (329), 125 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:28:39,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 329 transitions. [2021-07-13 19:28:39,649 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 329 transitions. Word has length 15 [2021-07-13 19:28:39,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:28:39,649 INFO L482 AbstractCegarLoop]: Abstraction has 126 states and 329 transitions. [2021-07-13 19:28:39,649 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:28:39,649 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 329 transitions. [2021-07-13 19:28:39,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-13 19:28:39,649 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:28:39,649 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:28:39,856 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable444 [2021-07-13 19:28:39,857 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:28:39,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:28:39,857 INFO L82 PathProgramCache]: Analyzing trace with hash -2088204200, now seen corresponding path program 56 times [2021-07-13 19:28:39,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:28:39,857 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275332157] [2021-07-13 19:28:39,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:28:39,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:28:39,931 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:28:39,931 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:28:39,931 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275332157] [2021-07-13 19:28:39,932 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [275332157] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:28:39,932 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1425600326] [2021-07-13 19:28:39,932 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:28:39,957 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:28:39,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:28:39,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-13 19:28:39,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:28:40,047 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:40,048 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:40,048 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:28:40,049 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:28:40,051 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:40,051 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:40,053 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:28:40,054 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:28:40,056 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:40,057 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:40,057 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:28:40,058 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:28:40,060 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:40,060 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:28:40,061 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:28:40,093 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-07-13 19:28:40,093 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:28:40,093 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:28:40,094 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-07-13 19:28:40,136 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:28:40,136 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1425600326] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:28:40,136 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:28:40,137 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:28:40,137 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536987022] [2021-07-13 19:28:40,137 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:28:40,137 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:28:40,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:28:40,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:28:40,137 INFO L87 Difference]: Start difference. First operand 126 states and 329 transitions. Second operand has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:28:40,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:28:40,506 INFO L93 Difference]: Finished difference Result 199 states and 462 transitions. [2021-07-13 19:28:40,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:28:40,506 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-13 19:28:40,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:28:40,507 INFO L225 Difference]: With dead ends: 199 [2021-07-13 19:28:40,507 INFO L226 Difference]: Without dead ends: 199 [2021-07-13 19:28:40,507 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 393.4ms TimeCoverageRelationStatistics Valid=95, Invalid=457, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:28:40,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2021-07-13 19:28:40,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 126. [2021-07-13 19:28:40,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 125 states have (on average 2.616) internal successors, (327), 125 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:28:40,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 327 transitions. [2021-07-13 19:28:40,510 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 327 transitions. Word has length 15 [2021-07-13 19:28:40,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:28:40,510 INFO L482 AbstractCegarLoop]: Abstraction has 126 states and 327 transitions. [2021-07-13 19:28:40,510 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:28:40,510 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 327 transitions. [2021-07-13 19:28:40,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-13 19:28:40,511 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:28:40,511 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:28:40,716 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable449 [2021-07-13 19:28:40,716 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:28:40,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:28:40,723 INFO L82 PathProgramCache]: Analyzing trace with hash 496149788, now seen corresponding path program 57 times [2021-07-13 19:28:40,723 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:28:40,723 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315804180] [2021-07-13 19:28:40,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:28:40,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:28:40,786 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:28:40,786 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:28:40,787 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315804180] [2021-07-13 19:28:40,787 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1315804180] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:28:40,787 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2125519296] [2021-07-13 19:28:40,787 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:28:40,811 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:28:40,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:28:40,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-13 19:28:40,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:28:40,930 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:40,930 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:40,931 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:28:40,931 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:28:40,933 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:40,934 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:28:40,934 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:28:40,956 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-07-13 19:28:40,957 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:28:40,959 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:28:40,959 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-07-13 19:28:40,978 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:28:40,978 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2125519296] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:28:40,978 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:28:40,978 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:28:40,978 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965695336] [2021-07-13 19:28:40,978 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:28:40,979 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:28:40,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:28:40,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:28:40,979 INFO L87 Difference]: Start difference. First operand 126 states and 327 transitions. Second operand has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:28:41,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:28:41,230 INFO L93 Difference]: Finished difference Result 187 states and 454 transitions. [2021-07-13 19:28:41,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:28:41,230 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-13 19:28:41,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:28:41,231 INFO L225 Difference]: With dead ends: 187 [2021-07-13 19:28:41,231 INFO L226 Difference]: Without dead ends: 187 [2021-07-13 19:28:41,231 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 261.5ms TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:28:41,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2021-07-13 19:28:41,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 128. [2021-07-13 19:28:41,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 127 states have (on average 2.6141732283464565) internal successors, (332), 127 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:28:41,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 332 transitions. [2021-07-13 19:28:41,234 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 332 transitions. Word has length 15 [2021-07-13 19:28:41,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:28:41,234 INFO L482 AbstractCegarLoop]: Abstraction has 128 states and 332 transitions. [2021-07-13 19:28:41,234 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:28:41,234 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 332 transitions. [2021-07-13 19:28:41,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-13 19:28:41,235 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:28:41,235 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:28:41,451 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable453 [2021-07-13 19:28:41,451 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:28:41,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:28:41,451 INFO L82 PathProgramCache]: Analyzing trace with hash -993255208, now seen corresponding path program 58 times [2021-07-13 19:28:41,451 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:28:41,451 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418574907] [2021-07-13 19:28:41,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:28:41,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:28:41,511 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:28:41,512 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:28:41,512 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418574907] [2021-07-13 19:28:41,512 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [418574907] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:28:41,512 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1291772183] [2021-07-13 19:28:41,512 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:28:41,537 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:28:41,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:28:41,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-13 19:28:41,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:28:41,635 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:41,639 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:41,639 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:28:41,640 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:28:41,642 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:41,642 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:28:41,643 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:28:41,664 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-07-13 19:28:41,664 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:28:41,665 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:28:41,665 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-07-13 19:28:41,683 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:28:41,684 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1291772183] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:28:41,684 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:28:41,684 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:28:41,684 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675340869] [2021-07-13 19:28:41,684 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:28:41,684 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:28:41,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:28:41,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:28:41,684 INFO L87 Difference]: Start difference. First operand 128 states and 332 transitions. Second operand has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:28:41,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:28:41,771 INFO L93 Difference]: Finished difference Result 170 states and 424 transitions. [2021-07-13 19:28:41,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:28:41,771 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-13 19:28:41,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:28:41,772 INFO L225 Difference]: With dead ends: 170 [2021-07-13 19:28:41,772 INFO L226 Difference]: Without dead ends: 170 [2021-07-13 19:28:41,772 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 121.6ms TimeCoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:28:41,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2021-07-13 19:28:41,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 128. [2021-07-13 19:28:41,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 127 states have (on average 2.6141732283464565) internal successors, (332), 127 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:28:41,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 332 transitions. [2021-07-13 19:28:41,775 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 332 transitions. Word has length 15 [2021-07-13 19:28:41,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:28:41,775 INFO L482 AbstractCegarLoop]: Abstraction has 128 states and 332 transitions. [2021-07-13 19:28:41,775 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:28:41,775 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 332 transitions. [2021-07-13 19:28:41,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-13 19:28:41,775 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:28:41,775 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:28:41,992 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable456 [2021-07-13 19:28:41,992 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:28:41,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:28:41,992 INFO L82 PathProgramCache]: Analyzing trace with hash -1505045474, now seen corresponding path program 59 times [2021-07-13 19:28:41,992 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:28:41,993 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152731855] [2021-07-13 19:28:41,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:28:41,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:28:42,044 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:28:42,044 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:28:42,044 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152731855] [2021-07-13 19:28:42,044 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1152731855] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:28:42,044 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1116808836] [2021-07-13 19:28:42,044 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:28:42,072 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:28:42,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:28:42,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-13 19:28:42,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:28:42,147 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:42,147 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:42,148 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:28:42,148 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:28:42,150 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:42,150 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:28:42,151 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:28:42,166 INFO L628 ElimStorePlain]: treesize reduction 30, result has 33.3 percent of original size [2021-07-13 19:28:42,166 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:28:42,167 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:28:42,167 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:59, output treesize:15 [2021-07-13 19:28:42,185 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:28:42,185 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1116808836] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:28:42,185 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:28:42,185 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:28:42,186 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584779241] [2021-07-13 19:28:42,186 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:28:42,186 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:28:42,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:28:42,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:28:42,187 INFO L87 Difference]: Start difference. First operand 128 states and 332 transitions. Second operand has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:28:42,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:28:42,370 INFO L93 Difference]: Finished difference Result 205 states and 480 transitions. [2021-07-13 19:28:42,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 19:28:42,370 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-13 19:28:42,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:28:42,371 INFO L225 Difference]: With dead ends: 205 [2021-07-13 19:28:42,371 INFO L226 Difference]: Without dead ends: 205 [2021-07-13 19:28:42,371 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 136.5ms TimeCoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:28:42,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2021-07-13 19:28:42,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 140. [2021-07-13 19:28:42,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 139 states have (on average 2.697841726618705) internal successors, (375), 139 states have internal predecessors, (375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:28:42,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 375 transitions. [2021-07-13 19:28:42,374 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 375 transitions. Word has length 15 [2021-07-13 19:28:42,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:28:42,374 INFO L482 AbstractCegarLoop]: Abstraction has 140 states and 375 transitions. [2021-07-13 19:28:42,374 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:28:42,374 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 375 transitions. [2021-07-13 19:28:42,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-13 19:28:42,374 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:28:42,374 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:28:42,584 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable459,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:28:42,585 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:28:42,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:28:42,585 INFO L82 PathProgramCache]: Analyzing trace with hash 1870221114, now seen corresponding path program 60 times [2021-07-13 19:28:42,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:28:42,585 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267246911] [2021-07-13 19:28:42,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:28:42,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:28:42,641 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:28:42,642 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:28:42,642 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267246911] [2021-07-13 19:28:42,642 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1267246911] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:28:42,643 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [166610524] [2021-07-13 19:28:42,643 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:28:42,668 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:28:42,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:28:42,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-13 19:28:42,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:28:42,755 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:28:42,756 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:28:42,758 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:28:42,759 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:28:42,761 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:28:42,762 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:28:42,764 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:28:42,765 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:28:42,767 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:42,767 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:42,768 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:28:42,769 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:28:42,771 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:42,771 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:28:42,771 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:28:42,801 INFO L628 ElimStorePlain]: treesize reduction 43, result has 40.3 percent of original size [2021-07-13 19:28:42,802 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:28:42,802 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:28:42,802 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 2 variables, input treesize:125, output treesize:29 [2021-07-13 19:28:42,830 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:28:42,831 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [166610524] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:28:42,831 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:28:42,831 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:28:42,831 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136443697] [2021-07-13 19:28:42,831 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:28:42,831 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:28:42,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:28:42,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:28:42,832 INFO L87 Difference]: Start difference. First operand 140 states and 375 transitions. Second operand has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:28:43,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:28:43,089 INFO L93 Difference]: Finished difference Result 187 states and 444 transitions. [2021-07-13 19:28:43,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 19:28:43,089 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-13 19:28:43,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:28:43,090 INFO L225 Difference]: With dead ends: 187 [2021-07-13 19:28:43,090 INFO L226 Difference]: Without dead ends: 183 [2021-07-13 19:28:43,090 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 268.3ms TimeCoverageRelationStatistics Valid=87, Invalid=465, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:28:43,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2021-07-13 19:28:43,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 142. [2021-07-13 19:28:43,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 2.652482269503546) internal successors, (374), 141 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:28:43,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 374 transitions. [2021-07-13 19:28:43,093 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 374 transitions. Word has length 15 [2021-07-13 19:28:43,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:28:43,093 INFO L482 AbstractCegarLoop]: Abstraction has 142 states and 374 transitions. [2021-07-13 19:28:43,093 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:28:43,093 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 374 transitions. [2021-07-13 19:28:43,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-13 19:28:43,093 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:28:43,093 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:28:43,307 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable461,65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:28:43,307 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:28:43,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:28:43,308 INFO L82 PathProgramCache]: Analyzing trace with hash -1497315076, now seen corresponding path program 61 times [2021-07-13 19:28:43,308 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:28:43,308 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250708650] [2021-07-13 19:28:43,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:28:43,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:28:43,368 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:28:43,368 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:28:43,368 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250708650] [2021-07-13 19:28:43,368 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1250708650] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:28:43,368 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [551739302] [2021-07-13 19:28:43,368 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:28:43,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:28:43,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-13 19:28:43,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:28:43,473 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:43,474 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:43,474 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:28:43,475 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:28:43,477 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:43,478 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:43,478 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:28:43,479 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:28:43,481 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:43,482 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:43,482 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:28:43,483 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:28:43,485 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:43,485 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:28:43,486 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:28:43,519 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-07-13 19:28:43,519 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:28:43,519 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:28:43,520 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-07-13 19:28:43,565 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:28:43,566 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [551739302] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:28:43,566 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:28:43,566 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:28:43,566 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452959989] [2021-07-13 19:28:43,566 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:28:43,566 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:28:43,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:28:43,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:28:43,567 INFO L87 Difference]: Start difference. First operand 142 states and 374 transitions. Second operand has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:28:43,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:28:43,856 INFO L93 Difference]: Finished difference Result 226 states and 506 transitions. [2021-07-13 19:28:43,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:28:43,856 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-13 19:28:43,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:28:43,857 INFO L225 Difference]: With dead ends: 226 [2021-07-13 19:28:43,857 INFO L226 Difference]: Without dead ends: 225 [2021-07-13 19:28:43,857 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 245.1ms TimeCoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:28:43,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2021-07-13 19:28:43,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 145. [2021-07-13 19:28:43,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 2.6805555555555554) internal successors, (386), 144 states have internal predecessors, (386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:28:43,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 386 transitions. [2021-07-13 19:28:43,859 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 386 transitions. Word has length 15 [2021-07-13 19:28:43,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:28:43,860 INFO L482 AbstractCegarLoop]: Abstraction has 145 states and 386 transitions. [2021-07-13 19:28:43,860 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:28:43,860 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 386 transitions. [2021-07-13 19:28:43,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-13 19:28:43,860 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:28:43,860 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:28:44,074 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable466 [2021-07-13 19:28:44,074 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:28:44,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:28:44,075 INFO L82 PathProgramCache]: Analyzing trace with hash -695698848, now seen corresponding path program 62 times [2021-07-13 19:28:44,075 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:28:44,075 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473566692] [2021-07-13 19:28:44,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:28:44,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:28:44,139 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:28:44,139 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:28:44,140 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473566692] [2021-07-13 19:28:44,140 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [473566692] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:28:44,141 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [854502539] [2021-07-13 19:28:44,141 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:28:44,176 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:28:44,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:28:44,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-13 19:28:44,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:28:44,230 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:44,231 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:44,231 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:28:44,232 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:28:44,233 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:44,234 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:44,234 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:28:44,235 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:28:44,237 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:44,237 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:44,237 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:28:44,238 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:28:44,240 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:44,240 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:28:44,241 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:28:44,269 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-07-13 19:28:44,269 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:28:44,270 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:28:44,270 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-07-13 19:28:44,328 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:28:44,328 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [854502539] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:28:44,328 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:28:44,328 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:28:44,328 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869315049] [2021-07-13 19:28:44,328 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:28:44,328 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:28:44,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:28:44,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:28:44,329 INFO L87 Difference]: Start difference. First operand 145 states and 386 transitions. Second operand has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:28:44,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:28:44,717 INFO L93 Difference]: Finished difference Result 229 states and 520 transitions. [2021-07-13 19:28:44,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-13 19:28:44,717 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-13 19:28:44,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:28:44,718 INFO L225 Difference]: With dead ends: 229 [2021-07-13 19:28:44,718 INFO L226 Difference]: Without dead ends: 225 [2021-07-13 19:28:44,718 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 378.7ms TimeCoverageRelationStatistics Valid=115, Invalid=587, Unknown=0, NotChecked=0, Total=702 [2021-07-13 19:28:44,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2021-07-13 19:28:44,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 149. [2021-07-13 19:28:44,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 2.675675675675676) internal successors, (396), 148 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:28:44,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 396 transitions. [2021-07-13 19:28:44,721 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 396 transitions. Word has length 15 [2021-07-13 19:28:44,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:28:44,721 INFO L482 AbstractCegarLoop]: Abstraction has 149 states and 396 transitions. [2021-07-13 19:28:44,721 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:28:44,721 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 396 transitions. [2021-07-13 19:28:44,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-13 19:28:44,722 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:28:44,722 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:28:44,940 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable470,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:28:44,941 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:28:44,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:28:44,941 INFO L82 PathProgramCache]: Analyzing trace with hash 1022644858, now seen corresponding path program 63 times [2021-07-13 19:28:44,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:28:44,941 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242574039] [2021-07-13 19:28:44,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:28:44,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:28:44,998 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:28:44,998 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:28:44,998 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242574039] [2021-07-13 19:28:44,998 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [242574039] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:28:44,998 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1498560309] [2021-07-13 19:28:44,998 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:28:45,030 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 19:28:45,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:28:45,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-13 19:28:45,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:28:45,089 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:45,090 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:45,090 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:28:45,091 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:28:45,093 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:45,093 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:45,096 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:28:45,097 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:28:45,099 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:45,100 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:45,100 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:28:45,101 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:28:45,103 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:45,103 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:28:45,103 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:28:45,135 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-07-13 19:28:45,135 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:28:45,135 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:28:45,136 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-07-13 19:28:45,190 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:28:45,190 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1498560309] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:28:45,191 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:28:45,191 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:28:45,191 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041719865] [2021-07-13 19:28:45,191 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:28:45,191 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:28:45,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:28:45,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:28:45,191 INFO L87 Difference]: Start difference. First operand 149 states and 396 transitions. Second operand has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:28:45,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:28:45,468 INFO L93 Difference]: Finished difference Result 215 states and 496 transitions. [2021-07-13 19:28:45,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:28:45,468 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-13 19:28:45,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:28:45,469 INFO L225 Difference]: With dead ends: 215 [2021-07-13 19:28:45,469 INFO L226 Difference]: Without dead ends: 215 [2021-07-13 19:28:45,469 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 252.2ms TimeCoverageRelationStatistics Valid=89, Invalid=373, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:28:45,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2021-07-13 19:28:45,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 146. [2021-07-13 19:28:45,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 145 states have (on average 2.6344827586206896) internal successors, (382), 145 states have internal predecessors, (382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:28:45,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 382 transitions. [2021-07-13 19:28:45,471 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 382 transitions. Word has length 15 [2021-07-13 19:28:45,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:28:45,472 INFO L482 AbstractCegarLoop]: Abstraction has 146 states and 382 transitions. [2021-07-13 19:28:45,472 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:28:45,472 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 382 transitions. [2021-07-13 19:28:45,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-13 19:28:45,472 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:28:45,472 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:28:45,677 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable475,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:28:45,677 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:28:45,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:28:45,677 INFO L82 PathProgramCache]: Analyzing trace with hash -1379198886, now seen corresponding path program 64 times [2021-07-13 19:28:45,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:28:45,677 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606387966] [2021-07-13 19:28:45,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:28:45,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:28:45,750 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:28:45,751 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:28:45,751 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606387966] [2021-07-13 19:28:45,751 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [606387966] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:28:45,751 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1442039616] [2021-07-13 19:28:45,751 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:28:45,776 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:28:45,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:28:45,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-13 19:28:45,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:28:45,840 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:45,840 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:45,841 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:28:45,842 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:28:45,844 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:45,844 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:45,844 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:28:45,845 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:28:45,847 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:45,848 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:45,848 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:28:45,849 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:28:45,850 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:45,851 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:28:45,851 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:28:45,883 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-07-13 19:28:45,883 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:28:45,883 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:28:45,883 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-07-13 19:28:45,939 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:28:45,940 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1442039616] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:28:45,940 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:28:45,940 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:28:45,940 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152349825] [2021-07-13 19:28:45,940 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:28:45,940 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:28:45,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:28:45,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:28:45,941 INFO L87 Difference]: Start difference. First operand 146 states and 382 transitions. Second operand has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:28:46,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:28:46,285 INFO L93 Difference]: Finished difference Result 199 states and 465 transitions. [2021-07-13 19:28:46,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 19:28:46,285 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-13 19:28:46,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:28:46,286 INFO L225 Difference]: With dead ends: 199 [2021-07-13 19:28:46,286 INFO L226 Difference]: Without dead ends: 195 [2021-07-13 19:28:46,286 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 343.1ms TimeCoverageRelationStatistics Valid=112, Invalid=590, Unknown=0, NotChecked=0, Total=702 [2021-07-13 19:28:46,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2021-07-13 19:28:46,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 150. [2021-07-13 19:28:46,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 149 states have (on average 2.610738255033557) internal successors, (389), 149 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:28:46,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 389 transitions. [2021-07-13 19:28:46,289 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 389 transitions. Word has length 15 [2021-07-13 19:28:46,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:28:46,289 INFO L482 AbstractCegarLoop]: Abstraction has 150 states and 389 transitions. [2021-07-13 19:28:46,289 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:28:46,289 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 389 transitions. [2021-07-13 19:28:46,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-13 19:28:46,289 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:28:46,289 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:28:46,503 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable479 [2021-07-13 19:28:46,504 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:28:46,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:28:46,504 INFO L82 PathProgramCache]: Analyzing trace with hash 349848448, now seen corresponding path program 65 times [2021-07-13 19:28:46,504 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:28:46,504 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274616144] [2021-07-13 19:28:46,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:28:46,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:28:46,565 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:28:46,565 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:28:46,565 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274616144] [2021-07-13 19:28:46,565 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1274616144] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:28:46,565 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1125937131] [2021-07-13 19:28:46,565 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:28:46,591 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:28:46,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:28:46,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-13 19:28:46,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:28:46,690 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:28:46,691 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:28:46,694 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:46,694 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:46,695 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:28:46,695 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:28:46,698 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:28:46,698 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:28:46,701 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:46,701 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:46,701 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:28:46,702 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:28:46,704 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:28:46,705 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:28:46,708 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:28:46,709 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:28:46,749 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-07-13 19:28:46,749 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:28:46,750 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:28:46,750 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-07-13 19:28:46,781 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:28:46,781 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1125937131] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:28:46,781 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:28:46,781 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:28:46,781 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243098331] [2021-07-13 19:28:46,781 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:28:46,781 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:28:46,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:28:46,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:28:46,782 INFO L87 Difference]: Start difference. First operand 150 states and 389 transitions. Second operand has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:28:47,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:28:47,063 INFO L93 Difference]: Finished difference Result 174 states and 424 transitions. [2021-07-13 19:28:47,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 19:28:47,064 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-13 19:28:47,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:28:47,065 INFO L225 Difference]: With dead ends: 174 [2021-07-13 19:28:47,065 INFO L226 Difference]: Without dead ends: 166 [2021-07-13 19:28:47,065 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 279.8ms TimeCoverageRelationStatistics Valid=88, Invalid=464, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:28:47,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-07-13 19:28:47,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 150. [2021-07-13 19:28:47,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 149 states have (on average 2.5838926174496644) internal successors, (385), 149 states have internal predecessors, (385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:28:47,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 385 transitions. [2021-07-13 19:28:47,067 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 385 transitions. Word has length 15 [2021-07-13 19:28:47,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:28:47,067 INFO L482 AbstractCegarLoop]: Abstraction has 150 states and 385 transitions. [2021-07-13 19:28:47,067 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:28:47,068 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 385 transitions. [2021-07-13 19:28:47,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-13 19:28:47,068 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:28:47,068 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:28:47,280 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable485 [2021-07-13 19:28:47,281 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:28:47,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:28:47,281 INFO L82 PathProgramCache]: Analyzing trace with hash 2117593850, now seen corresponding path program 66 times [2021-07-13 19:28:47,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:28:47,281 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534072175] [2021-07-13 19:28:47,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:28:47,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:28:47,339 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:28:47,340 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:28:47,340 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534072175] [2021-07-13 19:28:47,340 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1534072175] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:28:47,340 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [376064385] [2021-07-13 19:28:47,340 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:28:47,364 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:28:47,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:28:47,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-13 19:28:47,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:28:47,448 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:47,448 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:47,449 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:28:47,450 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:28:47,452 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:47,452 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:28:47,453 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:28:47,474 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-07-13 19:28:47,474 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:28:47,475 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:28:47,475 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-07-13 19:28:47,493 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:28:47,493 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [376064385] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:28:47,493 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:28:47,493 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:28:47,493 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270706695] [2021-07-13 19:28:47,493 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:28:47,493 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:28:47,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:28:47,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:28:47,494 INFO L87 Difference]: Start difference. First operand 150 states and 385 transitions. Second operand has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:28:47,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:28:47,651 INFO L93 Difference]: Finished difference Result 211 states and 497 transitions. [2021-07-13 19:28:47,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:28:47,651 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-13 19:28:47,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:28:47,652 INFO L225 Difference]: With dead ends: 211 [2021-07-13 19:28:47,652 INFO L226 Difference]: Without dead ends: 211 [2021-07-13 19:28:47,652 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 135.4ms TimeCoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:28:47,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2021-07-13 19:28:47,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 151. [2021-07-13 19:28:47,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 2.5933333333333333) internal successors, (389), 150 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:28:47,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 389 transitions. [2021-07-13 19:28:47,655 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 389 transitions. Word has length 15 [2021-07-13 19:28:47,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:28:47,655 INFO L482 AbstractCegarLoop]: Abstraction has 151 states and 389 transitions. [2021-07-13 19:28:47,655 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:28:47,655 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 389 transitions. [2021-07-13 19:28:47,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-13 19:28:47,655 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:28:47,655 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:28:47,871 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable492,71 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:28:47,871 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:28:47,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:28:47,872 INFO L82 PathProgramCache]: Analyzing trace with hash -1913634692, now seen corresponding path program 67 times [2021-07-13 19:28:47,872 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:28:47,872 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606093457] [2021-07-13 19:28:47,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:28:47,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:28:47,938 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:28:47,939 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:28:47,939 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606093457] [2021-07-13 19:28:47,939 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [606093457] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:28:47,939 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1026225968] [2021-07-13 19:28:47,939 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-07-13 19:28:47,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:28:47,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-13 19:28:47,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:28:48,045 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:48,046 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:48,047 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:28:48,047 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:28:48,050 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:48,050 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:48,051 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:28:48,052 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:28:48,054 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:48,054 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:48,054 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:28:48,055 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:28:48,057 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:48,057 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:28:48,058 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:28:48,088 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-07-13 19:28:48,088 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:28:48,089 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:28:48,089 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-07-13 19:28:48,138 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:28:48,138 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1026225968] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:28:48,138 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:28:48,138 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:28:48,138 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317464808] [2021-07-13 19:28:48,139 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:28:48,139 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:28:48,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:28:48,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:28:48,139 INFO L87 Difference]: Start difference. First operand 151 states and 389 transitions. Second operand has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:28:48,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:28:48,282 INFO L93 Difference]: Finished difference Result 214 states and 495 transitions. [2021-07-13 19:28:48,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:28:48,282 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-13 19:28:48,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:28:48,283 INFO L225 Difference]: With dead ends: 214 [2021-07-13 19:28:48,283 INFO L226 Difference]: Without dead ends: 214 [2021-07-13 19:28:48,283 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 177.6ms TimeCoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:28:48,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2021-07-13 19:28:48,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 156. [2021-07-13 19:28:48,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 2.632258064516129) internal successors, (408), 155 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:28:48,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 408 transitions. [2021-07-13 19:28:48,286 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 408 transitions. Word has length 15 [2021-07-13 19:28:48,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:28:48,286 INFO L482 AbstractCegarLoop]: Abstraction has 156 states and 408 transitions. [2021-07-13 19:28:48,286 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:28:48,286 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 408 transitions. [2021-07-13 19:28:48,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-13 19:28:48,286 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:28:48,287 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:28:48,493 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable495,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:28:48,493 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:28:48,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:28:48,493 INFO L82 PathProgramCache]: Analyzing trace with hash -1112018464, now seen corresponding path program 68 times [2021-07-13 19:28:48,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:28:48,493 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57045588] [2021-07-13 19:28:48,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:28:48,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:28:48,581 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:28:48,581 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:28:48,581 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57045588] [2021-07-13 19:28:48,581 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [57045588] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:28:48,581 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2085888638] [2021-07-13 19:28:48,581 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:28:48,606 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:28:48,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:28:48,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-13 19:28:48,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:28:48,690 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:48,690 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:48,691 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:28:48,692 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:28:48,694 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:48,694 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:48,695 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:28:48,696 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:28:48,698 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:48,699 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:48,699 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:28:48,700 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:28:48,702 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:48,703 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:28:48,703 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:28:48,740 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-07-13 19:28:48,741 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:28:48,741 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:28:48,742 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-07-13 19:28:48,810 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:28:48,811 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2085888638] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:28:48,811 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:28:48,811 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:28:48,811 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477252665] [2021-07-13 19:28:48,811 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:28:48,811 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:28:48,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:28:48,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:28:48,812 INFO L87 Difference]: Start difference. First operand 156 states and 408 transitions. Second operand has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:28:49,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:28:49,303 INFO L93 Difference]: Finished difference Result 220 states and 506 transitions. [2021-07-13 19:28:49,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 19:28:49,304 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-13 19:28:49,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:28:49,304 INFO L225 Difference]: With dead ends: 220 [2021-07-13 19:28:49,305 INFO L226 Difference]: Without dead ends: 213 [2021-07-13 19:28:49,305 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 509.8ms TimeCoverageRelationStatistics Valid=120, Invalid=636, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:28:49,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2021-07-13 19:28:49,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 159. [2021-07-13 19:28:49,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 158 states have (on average 2.632911392405063) internal successors, (416), 158 states have internal predecessors, (416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:28:49,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 416 transitions. [2021-07-13 19:28:49,307 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 416 transitions. Word has length 15 [2021-07-13 19:28:49,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:28:49,307 INFO L482 AbstractCegarLoop]: Abstraction has 159 states and 416 transitions. [2021-07-13 19:28:49,307 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:28:49,307 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 416 transitions. [2021-07-13 19:28:49,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-13 19:28:49,308 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:28:49,308 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:28:49,508 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable499 [2021-07-13 19:28:49,509 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:28:49,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:28:49,509 INFO L82 PathProgramCache]: Analyzing trace with hash 606325242, now seen corresponding path program 69 times [2021-07-13 19:28:49,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:28:49,509 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875012647] [2021-07-13 19:28:49,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:28:49,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:28:49,594 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:28:49,594 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:28:49,594 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875012647] [2021-07-13 19:28:49,594 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [875012647] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:28:49,594 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1627246981] [2021-07-13 19:28:49,595 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:28:49,629 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 19:28:49,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:28:49,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-13 19:28:49,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:28:49,697 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:49,697 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:49,698 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:28:49,698 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:28:49,700 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:49,701 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:49,701 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:28:49,702 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:28:49,706 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:49,706 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:49,707 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:28:49,708 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:28:49,710 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:49,710 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:28:49,711 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:28:49,740 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-07-13 19:28:49,741 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:28:49,741 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:28:49,741 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-07-13 19:28:49,783 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:28:49,784 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1627246981] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:28:49,784 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:28:49,784 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:28:49,784 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789314997] [2021-07-13 19:28:49,784 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:28:49,784 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:28:49,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:28:49,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:28:49,785 INFO L87 Difference]: Start difference. First operand 159 states and 416 transitions. Second operand has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:28:50,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:28:50,091 INFO L93 Difference]: Finished difference Result 206 states and 487 transitions. [2021-07-13 19:28:50,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:28:50,091 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-13 19:28:50,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:28:50,092 INFO L225 Difference]: With dead ends: 206 [2021-07-13 19:28:50,092 INFO L226 Difference]: Without dead ends: 206 [2021-07-13 19:28:50,092 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 314.2ms TimeCoverageRelationStatistics Valid=83, Invalid=379, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:28:50,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2021-07-13 19:28:50,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 156. [2021-07-13 19:28:50,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 2.6) internal successors, (403), 155 states have internal predecessors, (403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:28:50,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 403 transitions. [2021-07-13 19:28:50,094 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 403 transitions. Word has length 15 [2021-07-13 19:28:50,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:28:50,095 INFO L482 AbstractCegarLoop]: Abstraction has 156 states and 403 transitions. [2021-07-13 19:28:50,095 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:28:50,095 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 403 transitions. [2021-07-13 19:28:50,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-13 19:28:50,095 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:28:50,095 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:28:50,307 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable504,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:28:50,308 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:28:50,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:28:50,308 INFO L82 PathProgramCache]: Analyzing trace with hash -1104288066, now seen corresponding path program 70 times [2021-07-13 19:28:50,308 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:28:50,308 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043597264] [2021-07-13 19:28:50,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:28:50,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:28:50,376 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:28:50,376 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:28:50,376 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043597264] [2021-07-13 19:28:50,376 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1043597264] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:28:50,376 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1996304425] [2021-07-13 19:28:50,376 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:28:50,402 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:28:50,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:28:50,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-13 19:28:50,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:28:50,503 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:50,503 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:50,504 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:28:50,504 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:28:50,507 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:50,507 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:28:50,507 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:28:50,529 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-07-13 19:28:50,529 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:28:50,530 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:28:50,530 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-07-13 19:28:50,548 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:28:50,548 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1996304425] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:28:50,548 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:28:50,548 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:28:50,548 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389942739] [2021-07-13 19:28:50,548 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:28:50,548 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:28:50,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:28:50,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:28:50,549 INFO L87 Difference]: Start difference. First operand 156 states and 403 transitions. Second operand has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:28:50,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:28:50,772 INFO L93 Difference]: Finished difference Result 193 states and 478 transitions. [2021-07-13 19:28:50,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:28:50,772 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-13 19:28:50,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:28:50,773 INFO L225 Difference]: With dead ends: 193 [2021-07-13 19:28:50,773 INFO L226 Difference]: Without dead ends: 193 [2021-07-13 19:28:50,773 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 258.0ms TimeCoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:28:50,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2021-07-13 19:28:50,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 158. [2021-07-13 19:28:50,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 2.605095541401274) internal successors, (409), 157 states have internal predecessors, (409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:28:50,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 409 transitions. [2021-07-13 19:28:50,775 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 409 transitions. Word has length 15 [2021-07-13 19:28:50,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:28:50,775 INFO L482 AbstractCegarLoop]: Abstraction has 158 states and 409 transitions. [2021-07-13 19:28:50,775 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:28:50,775 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 409 transitions. [2021-07-13 19:28:50,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-13 19:28:50,776 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:28:50,776 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:28:50,976 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable508,75 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:28:50,976 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:28:50,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:28:50,977 INFO L82 PathProgramCache]: Analyzing trace with hash 1701274234, now seen corresponding path program 71 times [2021-07-13 19:28:50,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:28:50,977 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429315230] [2021-07-13 19:28:50,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:28:50,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:28:51,034 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:28:51,034 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:28:51,035 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429315230] [2021-07-13 19:28:51,035 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1429315230] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:28:51,035 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [822638344] [2021-07-13 19:28:51,035 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:28:51,060 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:28:51,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:28:51,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-13 19:28:51,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:28:51,167 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:51,167 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:51,168 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:28:51,168 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:28:51,170 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:51,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:28:51,171 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:28:51,194 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-07-13 19:28:51,194 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:28:51,195 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:28:51,195 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-07-13 19:28:51,214 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:28:51,214 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [822638344] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:28:51,214 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:28:51,214 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:28:51,214 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480889376] [2021-07-13 19:28:51,214 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:28:51,214 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:28:51,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:28:51,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:28:51,215 INFO L87 Difference]: Start difference. First operand 158 states and 409 transitions. Second operand has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:28:51,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:28:51,328 INFO L93 Difference]: Finished difference Result 187 states and 466 transitions. [2021-07-13 19:28:51,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:28:51,329 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-13 19:28:51,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:28:51,329 INFO L225 Difference]: With dead ends: 187 [2021-07-13 19:28:51,329 INFO L226 Difference]: Without dead ends: 187 [2021-07-13 19:28:51,329 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 131.8ms TimeCoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:28:51,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2021-07-13 19:28:51,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 158. [2021-07-13 19:28:51,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 2.605095541401274) internal successors, (409), 157 states have internal predecessors, (409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:28:51,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 409 transitions. [2021-07-13 19:28:51,335 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 409 transitions. Word has length 15 [2021-07-13 19:28:51,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:28:51,335 INFO L482 AbstractCegarLoop]: Abstraction has 158 states and 409 transitions. [2021-07-13 19:28:51,335 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:28:51,335 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 409 transitions. [2021-07-13 19:28:51,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-13 19:28:51,336 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:28:51,336 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:28:51,544 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable511,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:28:51,545 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:28:51,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:28:51,545 INFO L82 PathProgramCache]: Analyzing trace with hash 202352474, now seen corresponding path program 72 times [2021-07-13 19:28:51,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:28:51,545 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576413807] [2021-07-13 19:28:51,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:28:51,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:28:51,597 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:28:51,597 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:28:51,598 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576413807] [2021-07-13 19:28:51,598 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [576413807] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:28:51,598 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [622760527] [2021-07-13 19:28:51,598 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:28:51,624 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:28:51,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:28:51,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-13 19:28:51,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:28:51,710 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:51,710 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:51,711 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:28:51,711 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:28:51,715 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:51,716 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:28:51,716 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:28:51,733 INFO L628 ElimStorePlain]: treesize reduction 30, result has 33.3 percent of original size [2021-07-13 19:28:51,734 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:28:51,734 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:28:51,734 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:59, output treesize:15 [2021-07-13 19:28:51,754 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:28:51,754 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [622760527] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:28:51,754 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:28:51,754 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 19:28:51,755 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443279343] [2021-07-13 19:28:51,755 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:28:51,755 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:28:51,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:28:51,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:28:51,755 INFO L87 Difference]: Start difference. First operand 158 states and 409 transitions. Second operand has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:28:51,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:28:51,897 INFO L93 Difference]: Finished difference Result 231 states and 540 transitions. [2021-07-13 19:28:51,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:28:51,898 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-13 19:28:51,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:28:51,899 INFO L225 Difference]: With dead ends: 231 [2021-07-13 19:28:51,899 INFO L226 Difference]: Without dead ends: 231 [2021-07-13 19:28:51,899 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 122.2ms TimeCoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:28:51,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2021-07-13 19:28:51,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 171. [2021-07-13 19:28:51,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 170 states have (on average 2.6470588235294117) internal successors, (450), 170 states have internal predecessors, (450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:28:51,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 450 transitions. [2021-07-13 19:28:51,902 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 450 transitions. Word has length 15 [2021-07-13 19:28:51,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:28:51,902 INFO L482 AbstractCegarLoop]: Abstraction has 171 states and 450 transitions. [2021-07-13 19:28:51,902 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:28:51,902 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 450 transitions. [2021-07-13 19:28:51,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-13 19:28:51,902 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:28:51,902 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:28:52,119 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable514 [2021-07-13 19:28:52,119 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:28:52,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:28:52,120 INFO L82 PathProgramCache]: Analyzing trace with hash 1756401598, now seen corresponding path program 73 times [2021-07-13 19:28:52,120 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:28:52,120 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36655208] [2021-07-13 19:28:52,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:28:52,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:28:52,176 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:28:52,177 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:28:52,177 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36655208] [2021-07-13 19:28:52,177 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [36655208] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:28:52,177 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [483918095] [2021-07-13 19:28:52,177 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:28:52,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:28:52,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-13 19:28:52,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:28:52,321 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:28:52,322 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:28:52,324 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:28:52,325 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:28:52,327 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:28:52,328 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:28:52,330 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:28:52,331 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:28:52,333 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:52,333 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:52,334 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:28:52,334 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:28:52,336 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:52,337 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:28:52,337 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:28:52,367 INFO L628 ElimStorePlain]: treesize reduction 43, result has 40.3 percent of original size [2021-07-13 19:28:52,367 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:28:52,368 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:28:52,368 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 2 variables, input treesize:125, output treesize:29 [2021-07-13 19:28:52,397 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:28:52,397 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [483918095] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:28:52,397 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:28:52,397 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 19:28:52,397 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595404561] [2021-07-13 19:28:52,397 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:28:52,397 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:28:52,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:28:52,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:28:52,398 INFO L87 Difference]: Start difference. First operand 171 states and 450 transitions. Second operand has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:28:52,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:28:52,700 INFO L93 Difference]: Finished difference Result 216 states and 508 transitions. [2021-07-13 19:28:52,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 19:28:52,700 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-13 19:28:52,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:28:52,701 INFO L225 Difference]: With dead ends: 216 [2021-07-13 19:28:52,701 INFO L226 Difference]: Without dead ends: 213 [2021-07-13 19:28:52,701 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 299.9ms TimeCoverageRelationStatistics Valid=89, Invalid=511, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:28:52,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2021-07-13 19:28:52,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 174. [2021-07-13 19:28:52,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 173 states have (on average 2.6184971098265897) internal successors, (453), 173 states have internal predecessors, (453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:28:52,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 453 transitions. [2021-07-13 19:28:52,704 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 453 transitions. Word has length 15 [2021-07-13 19:28:52,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:28:52,704 INFO L482 AbstractCegarLoop]: Abstraction has 174 states and 453 transitions. [2021-07-13 19:28:52,704 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:28:52,704 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 453 transitions. [2021-07-13 19:28:52,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-13 19:28:52,704 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:28:52,704 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:28:52,920 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable516 [2021-07-13 19:28:52,921 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:28:52,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:28:52,921 INFO L82 PathProgramCache]: Analyzing trace with hash 441994812, now seen corresponding path program 74 times [2021-07-13 19:28:52,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:28:52,921 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635060915] [2021-07-13 19:28:52,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:28:52,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:28:52,982 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:28:52,982 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:28:52,982 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635060915] [2021-07-13 19:28:52,982 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [635060915] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:28:52,982 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [219512710] [2021-07-13 19:28:52,983 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:28:53,012 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:28:53,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:28:53,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-13 19:28:53,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:28:53,103 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:53,104 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:53,104 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:28:53,105 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:28:53,106 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:53,107 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:28:53,107 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:28:53,123 INFO L628 ElimStorePlain]: treesize reduction 30, result has 33.3 percent of original size [2021-07-13 19:28:53,123 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:28:53,123 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:28:53,123 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:59, output treesize:15 [2021-07-13 19:28:53,142 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:28:53,142 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [219512710] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:28:53,142 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:28:53,142 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 19:28:53,142 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049334347] [2021-07-13 19:28:53,143 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:28:53,143 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:28:53,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:28:53,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:28:53,143 INFO L87 Difference]: Start difference. First operand 174 states and 453 transitions. Second operand has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:28:53,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:28:53,566 INFO L93 Difference]: Finished difference Result 248 states and 574 transitions. [2021-07-13 19:28:53,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 19:28:53,567 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-13 19:28:53,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:28:53,567 INFO L225 Difference]: With dead ends: 248 [2021-07-13 19:28:53,567 INFO L226 Difference]: Without dead ends: 248 [2021-07-13 19:28:53,568 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 394.6ms TimeCoverageRelationStatistics Valid=126, Invalid=686, Unknown=0, NotChecked=0, Total=812 [2021-07-13 19:28:53,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2021-07-13 19:28:53,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 172. [2021-07-13 19:28:53,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 171 states have (on average 2.6374269005847952) internal successors, (451), 171 states have internal predecessors, (451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:28:53,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 451 transitions. [2021-07-13 19:28:53,570 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 451 transitions. Word has length 15 [2021-07-13 19:28:53,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:28:53,570 INFO L482 AbstractCegarLoop]: Abstraction has 172 states and 451 transitions. [2021-07-13 19:28:53,570 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:28:53,571 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 451 transitions. [2021-07-13 19:28:53,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-13 19:28:53,571 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:28:53,571 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:28:53,777 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable521 [2021-07-13 19:28:53,777 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:28:53,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:28:53,777 INFO L82 PathProgramCache]: Analyzing trace with hash -477705896, now seen corresponding path program 75 times [2021-07-13 19:28:53,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:28:53,777 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740780168] [2021-07-13 19:28:53,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:28:53,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:28:53,839 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:28:53,839 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:28:53,839 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740780168] [2021-07-13 19:28:53,839 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740780168] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:28:53,839 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1570499200] [2021-07-13 19:28:53,839 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:28:53,864 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-13 19:28:53,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:28:53,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-13 19:28:53,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:28:53,974 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:28:53,975 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:28:53,978 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:28:53,978 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:28:53,982 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:28:53,982 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:28:53,985 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:28:53,985 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:28:53,988 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:53,988 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:53,990 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:28:53,992 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:28:53,994 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:53,995 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:28:53,995 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:28:54,029 INFO L628 ElimStorePlain]: treesize reduction 43, result has 40.3 percent of original size [2021-07-13 19:28:54,029 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:28:54,030 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:28:54,030 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 2 variables, input treesize:125, output treesize:29 [2021-07-13 19:28:54,058 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:28:54,059 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1570499200] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:28:54,059 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:28:54,059 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 19:28:54,059 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187081828] [2021-07-13 19:28:54,059 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:28:54,059 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:28:54,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:28:54,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:28:54,059 INFO L87 Difference]: Start difference. First operand 172 states and 451 transitions. Second operand has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:28:54,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:28:54,492 INFO L93 Difference]: Finished difference Result 217 states and 515 transitions. [2021-07-13 19:28:54,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 19:28:54,492 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-13 19:28:54,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:28:54,493 INFO L225 Difference]: With dead ends: 217 [2021-07-13 19:28:54,493 INFO L226 Difference]: Without dead ends: 213 [2021-07-13 19:28:54,493 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 409.3ms TimeCoverageRelationStatistics Valid=119, Invalid=637, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:28:54,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2021-07-13 19:28:54,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 173. [2021-07-13 19:28:54,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 172 states have (on average 2.633720930232558) internal successors, (453), 172 states have internal predecessors, (453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:28:54,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 453 transitions. [2021-07-13 19:28:54,495 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 453 transitions. Word has length 15 [2021-07-13 19:28:54,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:28:54,495 INFO L482 AbstractCegarLoop]: Abstraction has 173 states and 453 transitions. [2021-07-13 19:28:54,496 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:28:54,496 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 453 transitions. [2021-07-13 19:28:54,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-13 19:28:54,496 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:28:54,496 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:28:54,696 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable523,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:28:54,697 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:28:54,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:28:54,697 INFO L82 PathProgramCache]: Analyzing trace with hash 449725210, now seen corresponding path program 76 times [2021-07-13 19:28:54,697 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:28:54,697 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987978194] [2021-07-13 19:28:54,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:28:54,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:28:54,766 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:28:54,766 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:28:54,766 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987978194] [2021-07-13 19:28:54,766 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [987978194] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:28:54,766 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1751374625] [2021-07-13 19:28:54,766 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:28:54,805 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:28:54,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:28:54,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-13 19:28:54,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:28:54,879 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:54,880 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:54,881 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:28:54,882 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:28:54,884 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:54,885 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:54,885 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:28:54,886 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:28:54,888 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:54,888 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:54,889 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:28:54,889 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:28:54,891 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:54,891 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:28:54,892 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:28:54,924 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-07-13 19:28:54,924 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:28:54,925 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:28:54,925 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-07-13 19:28:54,970 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:28:54,971 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1751374625] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:28:54,971 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:28:54,971 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 19:28:54,971 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057221571] [2021-07-13 19:28:54,971 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:28:54,971 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:28:54,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:28:54,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:28:54,971 INFO L87 Difference]: Start difference. First operand 173 states and 453 transitions. Second operand has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:28:55,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:28:55,294 INFO L93 Difference]: Finished difference Result 262 states and 580 transitions. [2021-07-13 19:28:55,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 19:28:55,296 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-13 19:28:55,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:28:55,297 INFO L225 Difference]: With dead ends: 262 [2021-07-13 19:28:55,297 INFO L226 Difference]: Without dead ends: 262 [2021-07-13 19:28:55,297 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 312.7ms TimeCoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:28:55,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2021-07-13 19:28:55,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 170. [2021-07-13 19:28:55,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 169 states have (on average 2.6272189349112427) internal successors, (444), 169 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:28:55,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 444 transitions. [2021-07-13 19:28:55,299 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 444 transitions. Word has length 15 [2021-07-13 19:28:55,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:28:55,299 INFO L482 AbstractCegarLoop]: Abstraction has 170 states and 444 transitions. [2021-07-13 19:28:55,300 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:28:55,300 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 444 transitions. [2021-07-13 19:28:55,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-13 19:28:55,300 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:28:55,300 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:28:55,509 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable528,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:28:55,509 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:28:55,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:28:55,509 INFO L82 PathProgramCache]: Analyzing trace with hash 1251341438, now seen corresponding path program 77 times [2021-07-13 19:28:55,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:28:55,509 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081979691] [2021-07-13 19:28:55,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:28:55,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:28:55,584 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:28:55,584 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:28:55,585 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081979691] [2021-07-13 19:28:55,585 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2081979691] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:28:55,585 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [345907571] [2021-07-13 19:28:55,585 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:28:55,610 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:28:55,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:28:55,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-13 19:28:55,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:28:55,692 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:55,692 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:55,693 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:28:55,693 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:28:55,696 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:55,696 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:55,696 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:28:55,697 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:28:55,699 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:55,700 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:55,700 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:28:55,701 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:28:55,702 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:55,703 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:28:55,703 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:28:55,735 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-07-13 19:28:55,735 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:28:55,736 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:28:55,736 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-07-13 19:28:55,802 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:28:55,802 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [345907571] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:28:55,802 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:28:55,802 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 19:28:55,802 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411464120] [2021-07-13 19:28:55,802 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:28:55,802 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:28:55,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:28:55,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:28:55,803 INFO L87 Difference]: Start difference. First operand 170 states and 444 transitions. Second operand has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:28:56,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:28:56,219 INFO L93 Difference]: Finished difference Result 235 states and 540 transitions. [2021-07-13 19:28:56,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 19:28:56,220 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-13 19:28:56,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:28:56,221 INFO L225 Difference]: With dead ends: 235 [2021-07-13 19:28:56,221 INFO L226 Difference]: Without dead ends: 231 [2021-07-13 19:28:56,221 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 441.5ms TimeCoverageRelationStatistics Valid=114, Invalid=536, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:28:56,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2021-07-13 19:28:56,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 174. [2021-07-13 19:28:56,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 173 states have (on average 2.6300578034682083) internal successors, (455), 173 states have internal predecessors, (455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:28:56,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 455 transitions. [2021-07-13 19:28:56,223 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 455 transitions. Word has length 15 [2021-07-13 19:28:56,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:28:56,224 INFO L482 AbstractCegarLoop]: Abstraction has 174 states and 455 transitions. [2021-07-13 19:28:56,224 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:28:56,224 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 455 transitions. [2021-07-13 19:28:56,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-13 19:28:56,224 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:28:56,224 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:28:56,440 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 82 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable532 [2021-07-13 19:28:56,440 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:28:56,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:28:56,440 INFO L82 PathProgramCache]: Analyzing trace with hash -1325282152, now seen corresponding path program 78 times [2021-07-13 19:28:56,440 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:28:56,441 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985790301] [2021-07-13 19:28:56,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:28:56,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:28:56,508 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:28:56,508 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:28:56,508 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985790301] [2021-07-13 19:28:56,508 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [985790301] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:28:56,508 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [429748374] [2021-07-13 19:28:56,508 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:28:56,533 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:28:56,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:28:56,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-13 19:28:56,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:28:56,611 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:56,612 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:56,612 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:28:56,613 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:28:56,615 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:56,615 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:56,615 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:28:56,616 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:28:56,619 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:56,619 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:56,619 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:28:56,620 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:28:56,622 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:56,622 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:28:56,623 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:28:56,654 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-07-13 19:28:56,654 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:28:56,655 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:28:56,655 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-07-13 19:28:56,699 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:28:56,699 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [429748374] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:28:56,699 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:28:56,699 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 19:28:56,699 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053786574] [2021-07-13 19:28:56,699 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:28:56,699 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:28:56,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:28:56,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:28:56,700 INFO L87 Difference]: Start difference. First operand 174 states and 455 transitions. Second operand has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:28:56,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:28:56,946 INFO L93 Difference]: Finished difference Result 226 states and 532 transitions. [2021-07-13 19:28:56,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:28:56,946 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-13 19:28:56,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:28:56,947 INFO L225 Difference]: With dead ends: 226 [2021-07-13 19:28:56,947 INFO L226 Difference]: Without dead ends: 226 [2021-07-13 19:28:56,947 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 262.2ms TimeCoverageRelationStatistics Valid=78, Invalid=342, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:28:56,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2021-07-13 19:28:56,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 172. [2021-07-13 19:28:56,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 171 states have (on average 2.6140350877192984) internal successors, (447), 171 states have internal predecessors, (447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:28:56,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 447 transitions. [2021-07-13 19:28:56,950 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 447 transitions. Word has length 15 [2021-07-13 19:28:56,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:28:56,950 INFO L482 AbstractCegarLoop]: Abstraction has 172 states and 447 transitions. [2021-07-13 19:28:56,950 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:28:56,950 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 447 transitions. [2021-07-13 19:28:56,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-13 19:28:56,950 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:28:56,950 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:28:57,155 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable537,83 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:28:57,155 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:28:57,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:28:57,155 INFO L82 PathProgramCache]: Analyzing trace with hash -1164635520, now seen corresponding path program 79 times [2021-07-13 19:28:57,155 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:28:57,155 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789621575] [2021-07-13 19:28:57,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:28:57,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:28:57,210 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:28:57,210 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:28:57,210 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789621575] [2021-07-13 19:28:57,211 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1789621575] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:28:57,211 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1081853782] [2021-07-13 19:28:57,211 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:28:57,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:28:57,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-13 19:28:57,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:28:57,308 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:57,308 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:57,309 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:28:57,309 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:28:57,311 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:57,312 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:57,312 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:28:57,313 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:28:57,315 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:57,315 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:57,316 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:28:57,316 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:28:57,318 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:57,318 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:28:57,319 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:28:57,352 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-07-13 19:28:57,352 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:28:57,353 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:28:57,353 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-07-13 19:28:57,411 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:28:57,411 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1081853782] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:28:57,411 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:28:57,411 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-07-13 19:28:57,411 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46544154] [2021-07-13 19:28:57,411 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:28:57,411 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:28:57,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:28:57,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:28:57,412 INFO L87 Difference]: Start difference. First operand 172 states and 447 transitions. Second operand has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:28:57,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:28:57,711 INFO L93 Difference]: Finished difference Result 195 states and 481 transitions. [2021-07-13 19:28:57,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:28:57,712 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-13 19:28:57,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:28:57,713 INFO L225 Difference]: With dead ends: 195 [2021-07-13 19:28:57,713 INFO L226 Difference]: Without dead ends: 191 [2021-07-13 19:28:57,713 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 358.8ms TimeCoverageRelationStatistics Valid=97, Invalid=455, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:28:57,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2021-07-13 19:28:57,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 174. [2021-07-13 19:28:57,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 173 states have (on average 2.61271676300578) internal successors, (452), 173 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:28:57,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 452 transitions. [2021-07-13 19:28:57,715 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 452 transitions. Word has length 15 [2021-07-13 19:28:57,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:28:57,715 INFO L482 AbstractCegarLoop]: Abstraction has 174 states and 452 transitions. [2021-07-13 19:28:57,715 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:28:57,715 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 452 transitions. [2021-07-13 19:28:57,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-13 19:28:57,716 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:28:57,716 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:28:57,916 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable541 [2021-07-13 19:28:57,916 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:28:57,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:28:57,916 INFO L82 PathProgramCache]: Analyzing trace with hash 33405594, now seen corresponding path program 80 times [2021-07-13 19:28:57,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:28:57,917 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760640979] [2021-07-13 19:28:57,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:28:57,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:28:57,980 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:28:57,980 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:28:57,980 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760640979] [2021-07-13 19:28:57,981 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [760640979] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:28:57,981 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1551752809] [2021-07-13 19:28:57,981 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:28:58,005 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:28:58,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:28:58,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-13 19:28:58,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:28:58,083 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:58,083 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:58,084 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:28:58,084 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:28:58,087 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:58,087 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:58,087 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:28:58,088 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:28:58,091 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:58,091 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:58,091 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:28:58,092 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:28:58,094 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:58,095 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:28:58,095 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:28:58,127 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-07-13 19:28:58,127 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:28:58,128 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:28:58,128 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-07-13 19:28:58,173 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:28:58,173 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1551752809] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:28:58,173 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:28:58,173 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-07-13 19:28:58,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946759620] [2021-07-13 19:28:58,174 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:28:58,174 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:28:58,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:28:58,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:28:58,174 INFO L87 Difference]: Start difference. First operand 174 states and 452 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:28:58,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:28:58,374 INFO L93 Difference]: Finished difference Result 269 states and 611 transitions. [2021-07-13 19:28:58,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:28:58,374 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-13 19:28:58,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:28:58,375 INFO L225 Difference]: With dead ends: 269 [2021-07-13 19:28:58,375 INFO L226 Difference]: Without dead ends: 269 [2021-07-13 19:28:58,375 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 206.3ms TimeCoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:28:58,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2021-07-13 19:28:58,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 182. [2021-07-13 19:28:58,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 181 states have (on average 2.657458563535912) internal successors, (481), 181 states have internal predecessors, (481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:28:58,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 481 transitions. [2021-07-13 19:28:58,378 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 481 transitions. Word has length 15 [2021-07-13 19:28:58,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:28:58,378 INFO L482 AbstractCegarLoop]: Abstraction has 182 states and 481 transitions. [2021-07-13 19:28:58,378 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:28:58,378 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 481 transitions. [2021-07-13 19:28:58,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-13 19:28:58,378 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:28:58,379 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:28:58,579 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable547 [2021-07-13 19:28:58,579 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:28:58,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:28:58,579 INFO L82 PathProgramCache]: Analyzing trace with hash 835021822, now seen corresponding path program 81 times [2021-07-13 19:28:58,580 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:28:58,580 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048187431] [2021-07-13 19:28:58,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:28:58,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:28:58,636 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:28:58,636 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:28:58,637 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048187431] [2021-07-13 19:28:58,637 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2048187431] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:28:58,637 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1940132099] [2021-07-13 19:28:58,637 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:28:58,664 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:28:58,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:28:58,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-13 19:28:58,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:28:58,730 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:58,730 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:58,731 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:28:58,731 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:28:58,734 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:58,734 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:58,734 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:28:58,735 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:28:58,737 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:58,738 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:58,738 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:28:58,739 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:28:58,740 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:58,741 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:28:58,741 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:28:58,773 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-07-13 19:28:58,773 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:28:58,773 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:28:58,773 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-07-13 19:28:58,835 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:28:58,835 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1940132099] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:28:58,835 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:28:58,835 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-07-13 19:28:58,835 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819568287] [2021-07-13 19:28:58,835 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:28:58,835 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:28:58,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:28:58,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:28:58,836 INFO L87 Difference]: Start difference. First operand 182 states and 481 transitions. Second operand has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:28:59,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:28:59,260 INFO L93 Difference]: Finished difference Result 292 states and 678 transitions. [2021-07-13 19:28:59,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 19:28:59,261 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-13 19:28:59,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:28:59,262 INFO L225 Difference]: With dead ends: 292 [2021-07-13 19:28:59,262 INFO L226 Difference]: Without dead ends: 286 [2021-07-13 19:28:59,262 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 401.5ms TimeCoverageRelationStatistics Valid=107, Invalid=543, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:28:59,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2021-07-13 19:28:59,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 201. [2021-07-13 19:28:59,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 200 states have (on average 2.72) internal successors, (544), 200 states have internal predecessors, (544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:28:59,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 544 transitions. [2021-07-13 19:28:59,267 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 544 transitions. Word has length 15 [2021-07-13 19:28:59,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:28:59,267 INFO L482 AbstractCegarLoop]: Abstraction has 201 states and 544 transitions. [2021-07-13 19:28:59,267 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:28:59,267 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 544 transitions. [2021-07-13 19:28:59,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-13 19:28:59,267 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:28:59,268 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:28:59,476 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable551 [2021-07-13 19:28:59,477 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:28:59,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:28:59,477 INFO L82 PathProgramCache]: Analyzing trace with hash -1741601768, now seen corresponding path program 82 times [2021-07-13 19:28:59,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:28:59,477 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438898195] [2021-07-13 19:28:59,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:28:59,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:28:59,534 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:28:59,535 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:28:59,535 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438898195] [2021-07-13 19:28:59,535 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [438898195] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:28:59,535 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [56420920] [2021-07-13 19:28:59,535 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:28:59,559 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:28:59,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:28:59,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-13 19:28:59,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:28:59,626 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:59,627 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:59,627 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:28:59,628 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:28:59,630 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:59,631 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:59,631 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:28:59,632 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:28:59,634 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:59,635 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:59,635 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:28:59,636 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:28:59,638 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:28:59,638 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:28:59,639 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:28:59,674 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-07-13 19:28:59,675 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:28:59,675 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:28:59,675 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-07-13 19:28:59,723 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:28:59,724 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [56420920] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:28:59,724 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:28:59,724 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-07-13 19:28:59,724 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445049460] [2021-07-13 19:28:59,724 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:28:59,724 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:28:59,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:28:59,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:28:59,725 INFO L87 Difference]: Start difference. First operand 201 states and 544 transitions. Second operand has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:28:59,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:28:59,961 INFO L93 Difference]: Finished difference Result 272 states and 647 transitions. [2021-07-13 19:28:59,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 19:28:59,961 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-13 19:28:59,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:28:59,962 INFO L225 Difference]: With dead ends: 272 [2021-07-13 19:28:59,962 INFO L226 Difference]: Without dead ends: 272 [2021-07-13 19:28:59,962 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 246.9ms TimeCoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:28:59,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2021-07-13 19:28:59,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 196. [2021-07-13 19:28:59,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 195 states have (on average 2.687179487179487) internal successors, (524), 195 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:28:59,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 524 transitions. [2021-07-13 19:28:59,965 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 524 transitions. Word has length 15 [2021-07-13 19:28:59,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:28:59,965 INFO L482 AbstractCegarLoop]: Abstraction has 196 states and 524 transitions. [2021-07-13 19:28:59,965 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:28:59,965 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 524 transitions. [2021-07-13 19:28:59,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-13 19:28:59,966 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:28:59,966 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:29:00,181 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable556 [2021-07-13 19:29:00,181 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:29:00,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:29:00,181 INFO L82 PathProgramCache]: Analyzing trace with hash 842752220, now seen corresponding path program 83 times [2021-07-13 19:29:00,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:29:00,182 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534940869] [2021-07-13 19:29:00,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:29:00,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:29:00,234 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:29:00,234 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:29:00,234 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534940869] [2021-07-13 19:29:00,234 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1534940869] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:29:00,234 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2045343400] [2021-07-13 19:29:00,234 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:29:00,259 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:29:00,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:29:00,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-13 19:29:00,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:29:00,353 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:29:00,353 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:29:00,353 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:29:00,354 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:29:00,356 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:29:00,356 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:29:00,357 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:29:00,378 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-07-13 19:29:00,378 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:29:00,379 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:29:00,379 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-07-13 19:29:00,396 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:29:00,396 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2045343400] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:29:00,396 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:29:00,396 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-07-13 19:29:00,396 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402703192] [2021-07-13 19:29:00,396 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:29:00,397 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:29:00,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:29:00,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:29:00,397 INFO L87 Difference]: Start difference. First operand 196 states and 524 transitions. Second operand has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:29:00,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:29:00,566 INFO L93 Difference]: Finished difference Result 273 states and 652 transitions. [2021-07-13 19:29:00,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:29:00,566 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-13 19:29:00,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:29:00,567 INFO L225 Difference]: With dead ends: 273 [2021-07-13 19:29:00,567 INFO L226 Difference]: Without dead ends: 273 [2021-07-13 19:29:00,567 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 113.9ms TimeCoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:29:00,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2021-07-13 19:29:00,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 196. [2021-07-13 19:29:00,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 195 states have (on average 2.687179487179487) internal successors, (524), 195 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:29:00,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 524 transitions. [2021-07-13 19:29:00,570 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 524 transitions. Word has length 15 [2021-07-13 19:29:00,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:29:00,570 INFO L482 AbstractCegarLoop]: Abstraction has 196 states and 524 transitions. [2021-07-13 19:29:00,570 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:29:00,570 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 524 transitions. [2021-07-13 19:29:00,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-13 19:29:00,571 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:29:00,571 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:29:00,784 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable560,88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:29:00,785 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:29:00,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:29:00,785 INFO L82 PathProgramCache]: Analyzing trace with hash 12399386, now seen corresponding path program 84 times [2021-07-13 19:29:00,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:29:00,785 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755247279] [2021-07-13 19:29:00,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:29:00,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:29:00,853 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:29:00,853 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:29:00,853 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755247279] [2021-07-13 19:29:00,853 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1755247279] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:29:00,853 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1589553707] [2021-07-13 19:29:00,853 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:29:00,877 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:29:00,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:29:00,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-13 19:29:00,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:29:00,954 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:29:00,955 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:29:00,955 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:29:00,956 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:29:00,959 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:29:00,959 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:29:00,959 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:29:00,960 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:29:00,963 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:29:00,963 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:29:00,963 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:29:00,964 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:29:00,967 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:29:00,967 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:29:00,968 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:29:01,001 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-07-13 19:29:01,001 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:29:01,002 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:29:01,002 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-07-13 19:29:01,046 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:29:01,046 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1589553707] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:29:01,047 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:29:01,047 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 19:29:01,047 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125533561] [2021-07-13 19:29:01,047 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:29:01,047 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:29:01,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:29:01,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:29:01,047 INFO L87 Difference]: Start difference. First operand 196 states and 524 transitions. Second operand has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:29:01,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:29:01,222 INFO L93 Difference]: Finished difference Result 276 states and 670 transitions. [2021-07-13 19:29:01,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:29:01,223 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-13 19:29:01,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:29:01,224 INFO L225 Difference]: With dead ends: 276 [2021-07-13 19:29:01,224 INFO L226 Difference]: Without dead ends: 276 [2021-07-13 19:29:01,224 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 216.0ms TimeCoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:29:01,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2021-07-13 19:29:01,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 206. [2021-07-13 19:29:01,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 205 states have (on average 2.7365853658536587) internal successors, (561), 205 states have internal predecessors, (561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:29:01,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 561 transitions. [2021-07-13 19:29:01,227 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 561 transitions. Word has length 15 [2021-07-13 19:29:01,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:29:01,227 INFO L482 AbstractCegarLoop]: Abstraction has 206 states and 561 transitions. [2021-07-13 19:29:01,227 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:29:01,227 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 561 transitions. [2021-07-13 19:29:01,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-13 19:29:01,228 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:29:01,228 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:29:01,428 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable563,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:29:01,428 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:29:01,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:29:01,428 INFO L82 PathProgramCache]: Analyzing trace with hash 814015614, now seen corresponding path program 85 times [2021-07-13 19:29:01,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:29:01,429 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109535968] [2021-07-13 19:29:01,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:29:01,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:29:01,505 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:29:01,506 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:29:01,506 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109535968] [2021-07-13 19:29:01,506 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [109535968] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:29:01,506 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1845793208] [2021-07-13 19:29:01,506 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:29:01,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:29:01,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-13 19:29:01,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:29:01,608 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:29:01,609 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:29:01,609 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:29:01,610 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:29:01,612 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:29:01,613 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:29:01,613 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:29:01,614 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:29:01,616 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:29:01,616 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:29:01,616 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:29:01,617 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:29:01,619 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:29:01,619 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:29:01,620 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:29:01,652 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-07-13 19:29:01,652 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:29:01,652 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:29:01,652 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-07-13 19:29:01,714 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:29:01,715 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1845793208] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:29:01,715 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:29:01,715 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 19:29:01,715 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16685080] [2021-07-13 19:29:01,715 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:29:01,715 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:29:01,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:29:01,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:29:01,716 INFO L87 Difference]: Start difference. First operand 206 states and 561 transitions. Second operand has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:29:02,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:29:02,259 INFO L93 Difference]: Finished difference Result 287 states and 687 transitions. [2021-07-13 19:29:02,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 19:29:02,260 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-13 19:29:02,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:29:02,261 INFO L225 Difference]: With dead ends: 287 [2021-07-13 19:29:02,261 INFO L226 Difference]: Without dead ends: 279 [2021-07-13 19:29:02,261 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 540.8ms TimeCoverageRelationStatistics Valid=138, Invalid=732, Unknown=0, NotChecked=0, Total=870 [2021-07-13 19:29:02,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2021-07-13 19:29:02,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 210. [2021-07-13 19:29:02,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 209 states have (on average 2.736842105263158) internal successors, (572), 209 states have internal predecessors, (572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:29:02,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 572 transitions. [2021-07-13 19:29:02,264 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 572 transitions. Word has length 15 [2021-07-13 19:29:02,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:29:02,264 INFO L482 AbstractCegarLoop]: Abstraction has 210 states and 572 transitions. [2021-07-13 19:29:02,264 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:29:02,264 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 572 transitions. [2021-07-13 19:29:02,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-13 19:29:02,264 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:29:02,265 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:29:02,465 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable567,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:29:02,466 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:29:02,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:29:02,466 INFO L82 PathProgramCache]: Analyzing trace with hash -1762607976, now seen corresponding path program 86 times [2021-07-13 19:29:02,466 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:29:02,466 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872730482] [2021-07-13 19:29:02,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:29:02,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:29:02,537 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:29:02,537 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:29:02,537 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872730482] [2021-07-13 19:29:02,537 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1872730482] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:29:02,537 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [801573315] [2021-07-13 19:29:02,537 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:29:02,562 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:29:02,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:29:02,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-13 19:29:02,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:29:02,641 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:29:02,642 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:29:02,642 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:29:02,643 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:29:02,645 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:29:02,645 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:29:02,645 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:29:02,646 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:29:02,648 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:29:02,649 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:29:02,649 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:29:02,650 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:29:02,652 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:29:02,652 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:29:02,653 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:29:02,684 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-07-13 19:29:02,685 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:29:02,685 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:29:02,685 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-07-13 19:29:02,730 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:29:02,730 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [801573315] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:29:02,730 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:29:02,730 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 19:29:02,730 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932616205] [2021-07-13 19:29:02,731 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:29:02,731 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:29:02,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:29:02,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:29:02,731 INFO L87 Difference]: Start difference. First operand 210 states and 572 transitions. Second operand has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:29:03,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:29:03,093 INFO L93 Difference]: Finished difference Result 285 states and 714 transitions. [2021-07-13 19:29:03,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 19:29:03,093 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-13 19:29:03,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:29:03,094 INFO L225 Difference]: With dead ends: 285 [2021-07-13 19:29:03,094 INFO L226 Difference]: Without dead ends: 285 [2021-07-13 19:29:03,094 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 389.3ms TimeCoverageRelationStatistics Valid=107, Invalid=493, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:29:03,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2021-07-13 19:29:03,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 221. [2021-07-13 19:29:03,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 220 states have (on average 2.768181818181818) internal successors, (609), 220 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:29:03,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 609 transitions. [2021-07-13 19:29:03,097 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 609 transitions. Word has length 15 [2021-07-13 19:29:03,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:29:03,097 INFO L482 AbstractCegarLoop]: Abstraction has 221 states and 609 transitions. [2021-07-13 19:29:03,097 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:29:03,098 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 609 transitions. [2021-07-13 19:29:03,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-13 19:29:03,098 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:29:03,098 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:29:03,305 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable572,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:29:03,305 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:29:03,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:29:03,305 INFO L82 PathProgramCache]: Analyzing trace with hash 821746012, now seen corresponding path program 87 times [2021-07-13 19:29:03,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:29:03,305 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598674648] [2021-07-13 19:29:03,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:29:03,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:29:03,393 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:29:03,393 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:29:03,393 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598674648] [2021-07-13 19:29:03,393 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [598674648] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:29:03,394 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1069314879] [2021-07-13 19:29:03,394 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:29:03,423 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:29:03,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:29:03,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-13 19:29:03,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:29:03,537 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:29:03,537 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:29:03,538 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:29:03,538 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:29:03,540 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:29:03,541 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:29:03,541 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:29:03,562 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-07-13 19:29:03,562 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:29:03,563 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:29:03,563 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-07-13 19:29:03,581 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:29:03,581 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1069314879] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:29:03,581 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:29:03,581 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 19:29:03,581 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508447473] [2021-07-13 19:29:03,581 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:29:03,581 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:29:03,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:29:03,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:29:03,582 INFO L87 Difference]: Start difference. First operand 221 states and 609 transitions. Second operand has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:29:03,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:29:03,954 INFO L93 Difference]: Finished difference Result 317 states and 763 transitions. [2021-07-13 19:29:03,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 19:29:03,955 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-13 19:29:03,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:29:03,956 INFO L225 Difference]: With dead ends: 317 [2021-07-13 19:29:03,956 INFO L226 Difference]: Without dead ends: 317 [2021-07-13 19:29:03,956 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 389.9ms TimeCoverageRelationStatistics Valid=113, Invalid=589, Unknown=0, NotChecked=0, Total=702 [2021-07-13 19:29:03,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2021-07-13 19:29:03,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 216. [2021-07-13 19:29:03,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 215 states have (on average 2.744186046511628) internal successors, (590), 215 states have internal predecessors, (590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:29:03,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 590 transitions. [2021-07-13 19:29:03,959 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 590 transitions. Word has length 15 [2021-07-13 19:29:03,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:29:03,960 INFO L482 AbstractCegarLoop]: Abstraction has 216 states and 590 transitions. [2021-07-13 19:29:03,960 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:29:03,960 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 590 transitions. [2021-07-13 19:29:03,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-13 19:29:03,960 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:29:03,960 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:29:04,176 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable576 [2021-07-13 19:29:04,176 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:29:04,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:29:04,177 INFO L82 PathProgramCache]: Analyzing trace with hash -667658984, now seen corresponding path program 88 times [2021-07-13 19:29:04,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:29:04,177 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586068738] [2021-07-13 19:29:04,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:29:04,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:29:04,228 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:29:04,229 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:29:04,229 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586068738] [2021-07-13 19:29:04,229 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586068738] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:29:04,229 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1004898462] [2021-07-13 19:29:04,229 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:29:04,256 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:29:04,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:29:04,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-13 19:29:04,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:29:04,359 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:29:04,360 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:29:04,360 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:29:04,361 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:29:04,363 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:29:04,363 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:29:04,364 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:29:04,384 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-07-13 19:29:04,384 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:29:04,388 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:29:04,388 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-07-13 19:29:04,406 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:29:04,406 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1004898462] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:29:04,406 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:29:04,406 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 19:29:04,406 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12627997] [2021-07-13 19:29:04,406 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:29:04,407 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:29:04,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:29:04,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:29:04,407 INFO L87 Difference]: Start difference. First operand 216 states and 590 transitions. Second operand has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:29:04,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:29:04,543 INFO L93 Difference]: Finished difference Result 282 states and 694 transitions. [2021-07-13 19:29:04,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:29:04,543 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-13 19:29:04,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:29:04,544 INFO L225 Difference]: With dead ends: 282 [2021-07-13 19:29:04,544 INFO L226 Difference]: Without dead ends: 282 [2021-07-13 19:29:04,544 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 122.1ms TimeCoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:29:04,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2021-07-13 19:29:04,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 216. [2021-07-13 19:29:04,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 215 states have (on average 2.744186046511628) internal successors, (590), 215 states have internal predecessors, (590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:29:04,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 590 transitions. [2021-07-13 19:29:04,547 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 590 transitions. Word has length 15 [2021-07-13 19:29:04,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:29:04,547 INFO L482 AbstractCegarLoop]: Abstraction has 216 states and 590 transitions. [2021-07-13 19:29:04,547 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:29:04,547 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 590 transitions. [2021-07-13 19:29:04,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-13 19:29:04,548 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:29:04,548 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:29:04,748 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable579,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:29:04,748 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:29:04,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:29:04,749 INFO L82 PathProgramCache]: Analyzing trace with hash 1814621922, now seen corresponding path program 89 times [2021-07-13 19:29:04,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:29:04,749 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721768280] [2021-07-13 19:29:04,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:29:04,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:29:04,804 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:29:04,804 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:29:04,804 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721768280] [2021-07-13 19:29:04,804 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721768280] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:29:04,804 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1911813133] [2021-07-13 19:29:04,804 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:29:04,829 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:29:04,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:29:04,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-13 19:29:04,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:29:04,896 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:29:04,896 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:29:04,897 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:29:04,898 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:29:04,899 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:29:04,913 INFO L628 ElimStorePlain]: treesize reduction 27, result has 30.8 percent of original size [2021-07-13 19:29:04,913 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:29:04,913 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:29:04,914 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:53, output treesize:12 [2021-07-13 19:29:04,930 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:29:04,930 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1911813133] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:29:04,930 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:29:04,930 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:29:04,930 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305536315] [2021-07-13 19:29:04,930 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:29:04,930 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:29:04,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:29:04,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:29:04,931 INFO L87 Difference]: Start difference. First operand 216 states and 590 transitions. Second operand has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 13 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:29:05,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:29:05,046 INFO L93 Difference]: Finished difference Result 285 states and 751 transitions. [2021-07-13 19:29:05,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:29:05,046 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 13 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-13 19:29:05,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:29:05,047 INFO L225 Difference]: With dead ends: 285 [2021-07-13 19:29:05,047 INFO L226 Difference]: Without dead ends: 285 [2021-07-13 19:29:05,047 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 125.5ms TimeCoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:29:05,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2021-07-13 19:29:05,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 215. [2021-07-13 19:29:05,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 214 states have (on average 2.7523364485981308) internal successors, (589), 214 states have internal predecessors, (589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:29:05,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 589 transitions. [2021-07-13 19:29:05,050 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 589 transitions. Word has length 15 [2021-07-13 19:29:05,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:29:05,050 INFO L482 AbstractCegarLoop]: Abstraction has 215 states and 589 transitions. [2021-07-13 19:29:05,050 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 13 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:29:05,050 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 589 transitions. [2021-07-13 19:29:05,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-13 19:29:05,050 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:29:05,050 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:29:05,251 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable582,94 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:29:05,251 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:29:05,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:29:05,251 INFO L82 PathProgramCache]: Analyzing trace with hash 1256099514, now seen corresponding path program 90 times [2021-07-13 19:29:05,251 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:29:05,251 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728154073] [2021-07-13 19:29:05,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:29:05,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:29:05,308 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:29:05,308 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:29:05,308 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728154073] [2021-07-13 19:29:05,308 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1728154073] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:29:05,308 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1043160987] [2021-07-13 19:29:05,308 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:29:05,333 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:29:05,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:29:05,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-13 19:29:05,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:29:05,438 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:29:05,438 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:29:05,439 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:29:05,442 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:29:05,443 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:29:05,445 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:29:05,445 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:29:05,446 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:29:05,448 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:29:05,449 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:29:05,450 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:29:05,451 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:29:05,453 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:29:05,454 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:29:05,481 INFO L628 ElimStorePlain]: treesize reduction 26, result has 43.5 percent of original size [2021-07-13 19:29:05,481 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:29:05,482 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:29:05,482 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 2 variables, input treesize:107, output treesize:20 [2021-07-13 19:29:05,509 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:29:05,509 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1043160987] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:29:05,509 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:29:05,510 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:29:05,510 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778793053] [2021-07-13 19:29:05,510 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:29:05,510 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:29:05,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:29:05,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:29:05,510 INFO L87 Difference]: Start difference. First operand 215 states and 589 transitions. Second operand has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 13 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:29:05,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:29:05,763 INFO L93 Difference]: Finished difference Result 282 states and 741 transitions. [2021-07-13 19:29:05,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:29:05,764 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 13 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-13 19:29:05,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:29:05,764 INFO L225 Difference]: With dead ends: 282 [2021-07-13 19:29:05,765 INFO L226 Difference]: Without dead ends: 278 [2021-07-13 19:29:05,765 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 284.0ms TimeCoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:29:05,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2021-07-13 19:29:05,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 215. [2021-07-13 19:29:05,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 214 states have (on average 2.7476635514018692) internal successors, (588), 214 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:29:05,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 588 transitions. [2021-07-13 19:29:05,767 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 588 transitions. Word has length 15 [2021-07-13 19:29:05,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:29:05,767 INFO L482 AbstractCegarLoop]: Abstraction has 215 states and 588 transitions. [2021-07-13 19:29:05,768 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 13 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:29:05,768 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 588 transitions. [2021-07-13 19:29:05,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-13 19:29:05,768 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:29:05,768 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:29:05,968 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable584,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:29:05,968 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:29:05,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:29:05,969 INFO L82 PathProgramCache]: Analyzing trace with hash 237280192, now seen corresponding path program 91 times [2021-07-13 19:29:05,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:29:05,969 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200988498] [2021-07-13 19:29:05,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:29:05,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:29:06,027 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:29:06,027 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:29:06,027 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200988498] [2021-07-13 19:29:06,028 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [200988498] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:29:06,028 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1110558285] [2021-07-13 19:29:06,028 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-07-13 19:29:06,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:29:06,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-13 19:29:06,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:29:06,156 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:29:06,157 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:29:06,157 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:29:06,158 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:29:06,160 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:29:06,160 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:29:06,161 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:29:06,181 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-07-13 19:29:06,182 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:29:06,182 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:29:06,182 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-07-13 19:29:06,199 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:29:06,200 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1110558285] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:29:06,200 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:29:06,200 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:29:06,200 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180544304] [2021-07-13 19:29:06,200 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:29:06,200 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:29:06,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:29:06,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:29:06,200 INFO L87 Difference]: Start difference. First operand 215 states and 588 transitions. Second operand has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:29:06,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:29:06,307 INFO L93 Difference]: Finished difference Result 286 states and 753 transitions. [2021-07-13 19:29:06,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:29:06,307 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-13 19:29:06,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:29:06,308 INFO L225 Difference]: With dead ends: 286 [2021-07-13 19:29:06,308 INFO L226 Difference]: Without dead ends: 286 [2021-07-13 19:29:06,308 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 123.8ms TimeCoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:29:06,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2021-07-13 19:29:06,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 216. [2021-07-13 19:29:06,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 215 states have (on average 2.7488372093023257) internal successors, (591), 215 states have internal predecessors, (591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:29:06,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 591 transitions. [2021-07-13 19:29:06,311 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 591 transitions. Word has length 15 [2021-07-13 19:29:06,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:29:06,311 INFO L482 AbstractCegarLoop]: Abstraction has 216 states and 591 transitions. [2021-07-13 19:29:06,311 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:29:06,311 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 591 transitions. [2021-07-13 19:29:06,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-13 19:29:06,311 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:29:06,311 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:29:06,512 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable591,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:29:06,512 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:29:06,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:29:06,512 INFO L82 PathProgramCache]: Analyzing trace with hash 1791329316, now seen corresponding path program 92 times [2021-07-13 19:29:06,512 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:29:06,512 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439796633] [2021-07-13 19:29:06,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:29:06,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:29:06,578 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:29:06,579 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:29:06,579 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439796633] [2021-07-13 19:29:06,579 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1439796633] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:29:06,579 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2002273185] [2021-07-13 19:29:06,579 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:29:06,603 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:29:06,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:29:06,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-13 19:29:06,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:29:06,729 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:29:06,730 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:29:06,733 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:29:06,733 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:29:06,733 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:29:06,734 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:29:06,736 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:29:06,737 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:29:06,739 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:29:06,740 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:29:06,742 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:29:06,743 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:29:06,743 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:29:06,744 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:29:06,746 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:29:06,746 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:29:06,778 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-07-13 19:29:06,778 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:29:06,779 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:29:06,779 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-07-13 19:29:06,803 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:29:06,803 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2002273185] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:29:06,803 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:29:06,803 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:29:06,803 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918717055] [2021-07-13 19:29:06,803 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:29:06,803 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:29:06,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:29:06,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:29:06,804 INFO L87 Difference]: Start difference. First operand 216 states and 591 transitions. Second operand has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:29:07,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:29:07,103 INFO L93 Difference]: Finished difference Result 284 states and 745 transitions. [2021-07-13 19:29:07,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:29:07,104 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-13 19:29:07,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:29:07,105 INFO L225 Difference]: With dead ends: 284 [2021-07-13 19:29:07,105 INFO L226 Difference]: Without dead ends: 281 [2021-07-13 19:29:07,105 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 352.6ms TimeCoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:29:07,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2021-07-13 19:29:07,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 216. [2021-07-13 19:29:07,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 215 states have (on average 2.744186046511628) internal successors, (590), 215 states have internal predecessors, (590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:29:07,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 590 transitions. [2021-07-13 19:29:07,108 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 590 transitions. Word has length 15 [2021-07-13 19:29:07,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:29:07,108 INFO L482 AbstractCegarLoop]: Abstraction has 216 states and 590 transitions. [2021-07-13 19:29:07,108 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:29:07,108 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 590 transitions. [2021-07-13 19:29:07,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-13 19:29:07,108 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:29:07,108 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:29:07,308 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable594 [2021-07-13 19:29:07,309 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:29:07,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:29:07,309 INFO L82 PathProgramCache]: Analyzing trace with hash 476922530, now seen corresponding path program 93 times [2021-07-13 19:29:07,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:29:07,309 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603352005] [2021-07-13 19:29:07,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:29:07,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:29:07,368 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:29:07,368 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:29:07,368 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603352005] [2021-07-13 19:29:07,368 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1603352005] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:29:07,368 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [750618257] [2021-07-13 19:29:07,368 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:29:07,395 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:29:07,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:29:07,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-13 19:29:07,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:29:07,500 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:29:07,501 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:29:07,501 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:29:07,501 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:29:07,504 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:29:07,504 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:29:07,504 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:29:07,525 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-07-13 19:29:07,525 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:29:07,526 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:29:07,526 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-07-13 19:29:07,543 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:29:07,543 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [750618257] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:29:07,543 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:29:07,543 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:29:07,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763277646] [2021-07-13 19:29:07,543 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:29:07,543 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:29:07,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:29:07,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:29:07,544 INFO L87 Difference]: Start difference. First operand 216 states and 590 transitions. Second operand has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:29:07,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:29:07,776 INFO L93 Difference]: Finished difference Result 301 states and 783 transitions. [2021-07-13 19:29:07,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:29:07,776 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-13 19:29:07,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:29:07,777 INFO L225 Difference]: With dead ends: 301 [2021-07-13 19:29:07,777 INFO L226 Difference]: Without dead ends: 301 [2021-07-13 19:29:07,777 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 248.1ms TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:29:07,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2021-07-13 19:29:07,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 219. [2021-07-13 19:29:07,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 218 states have (on average 2.7477064220183487) internal successors, (599), 218 states have internal predecessors, (599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:29:07,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 599 transitions. [2021-07-13 19:29:07,780 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 599 transitions. Word has length 15 [2021-07-13 19:29:07,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:29:07,780 INFO L482 AbstractCegarLoop]: Abstraction has 219 states and 599 transitions. [2021-07-13 19:29:07,780 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:29:07,780 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 599 transitions. [2021-07-13 19:29:07,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-13 19:29:07,780 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:29:07,781 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:29:07,984 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable601 [2021-07-13 19:29:07,985 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:29:07,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:29:07,985 INFO L82 PathProgramCache]: Analyzing trace with hash -442778178, now seen corresponding path program 94 times [2021-07-13 19:29:07,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:29:07,985 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962758696] [2021-07-13 19:29:07,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:29:07,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:29:08,049 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:29:08,049 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:29:08,049 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962758696] [2021-07-13 19:29:08,049 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1962758696] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:29:08,049 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1999902905] [2021-07-13 19:29:08,049 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:29:08,074 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:29:08,074 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:29:08,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-13 19:29:08,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:29:08,198 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:29:08,199 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:29:08,201 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:29:08,201 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:29:08,202 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:29:08,202 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:29:08,205 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:29:08,205 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:29:08,207 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:29:08,208 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:29:08,211 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:29:08,211 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:29:08,211 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:29:08,212 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:29:08,214 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:29:08,215 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:29:08,243 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-07-13 19:29:08,243 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:29:08,244 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:29:08,244 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-07-13 19:29:08,268 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:29:08,268 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1999902905] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:29:08,268 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:29:08,268 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:29:08,268 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826803514] [2021-07-13 19:29:08,268 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:29:08,268 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:29:08,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:29:08,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:29:08,269 INFO L87 Difference]: Start difference. First operand 219 states and 599 transitions. Second operand has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:29:08,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:29:08,585 INFO L93 Difference]: Finished difference Result 292 states and 762 transitions. [2021-07-13 19:29:08,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 19:29:08,585 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-13 19:29:08,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:29:08,586 INFO L225 Difference]: With dead ends: 292 [2021-07-13 19:29:08,586 INFO L226 Difference]: Without dead ends: 290 [2021-07-13 19:29:08,586 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 335.9ms TimeCoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:29:08,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2021-07-13 19:29:08,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 221. [2021-07-13 19:29:08,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 220 states have (on average 2.7454545454545456) internal successors, (604), 220 states have internal predecessors, (604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:29:08,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 604 transitions. [2021-07-13 19:29:08,589 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 604 transitions. Word has length 15 [2021-07-13 19:29:08,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:29:08,589 INFO L482 AbstractCegarLoop]: Abstraction has 221 states and 604 transitions. [2021-07-13 19:29:08,589 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:29:08,589 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 604 transitions. [2021-07-13 19:29:08,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-13 19:29:08,589 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:29:08,589 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:29:08,790 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable604,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:29:08,790 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:29:08,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:29:08,790 INFO L82 PathProgramCache]: Analyzing trace with hash 484652928, now seen corresponding path program 95 times [2021-07-13 19:29:08,790 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:29:08,790 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377786766] [2021-07-13 19:29:08,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:29:08,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:29:08,856 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:29:08,856 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:29:08,856 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377786766] [2021-07-13 19:29:08,856 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1377786766] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:29:08,856 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1027970178] [2021-07-13 19:29:08,856 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:29:08,882 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:29:08,882 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:29:08,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-13 19:29:08,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:29:08,963 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:29:08,963 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:29:08,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:29:08,964 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:29:08,967 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:29:08,967 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:29:08,967 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:29:08,971 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:29:08,974 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:29:08,974 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:29:08,975 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:29:08,976 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:29:08,978 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:29:08,978 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:29:08,979 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:29:09,014 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-07-13 19:29:09,014 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:29:09,014 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:29:09,014 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-07-13 19:29:09,058 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:29:09,059 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1027970178] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:29:09,059 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:29:09,059 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:29:09,059 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162908385] [2021-07-13 19:29:09,059 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:29:09,059 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:29:09,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:29:09,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:29:09,059 INFO L87 Difference]: Start difference. First operand 221 states and 604 transitions. Second operand has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:29:09,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:29:09,477 INFO L93 Difference]: Finished difference Result 359 states and 870 transitions. [2021-07-13 19:29:09,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:29:09,477 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-13 19:29:09,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:29:09,478 INFO L225 Difference]: With dead ends: 359 [2021-07-13 19:29:09,478 INFO L226 Difference]: Without dead ends: 359 [2021-07-13 19:29:09,478 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 385.4ms TimeCoverageRelationStatistics Valid=95, Invalid=457, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:29:09,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2021-07-13 19:29:09,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 224. [2021-07-13 19:29:09,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 223 states have (on average 2.7623318385650224) internal successors, (616), 223 states have internal predecessors, (616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:29:09,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 616 transitions. [2021-07-13 19:29:09,481 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 616 transitions. Word has length 15 [2021-07-13 19:29:09,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:29:09,482 INFO L482 AbstractCegarLoop]: Abstraction has 224 states and 616 transitions. [2021-07-13 19:29:09,482 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:29:09,482 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 616 transitions. [2021-07-13 19:29:09,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-13 19:29:09,482 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:29:09,482 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:29:09,682 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable611 [2021-07-13 19:29:09,683 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:29:09,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:29:09,683 INFO L82 PathProgramCache]: Analyzing trace with hash 1286269156, now seen corresponding path program 96 times [2021-07-13 19:29:09,683 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:29:09,683 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793754757] [2021-07-13 19:29:09,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:29:09,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:29:09,749 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:29:09,750 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:29:09,750 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793754757] [2021-07-13 19:29:09,750 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [793754757] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:29:09,750 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1093781434] [2021-07-13 19:29:09,750 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:29:09,774 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:29:09,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:29:09,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-13 19:29:09,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:29:09,853 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:29:09,854 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:29:09,854 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:29:09,855 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:29:09,857 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:29:09,858 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:29:09,858 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:29:09,859 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:29:09,861 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:29:09,861 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:29:09,861 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:29:09,862 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:29:09,864 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:29:09,864 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:29:09,865 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:29:09,896 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-07-13 19:29:09,897 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:29:09,897 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:29:09,897 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-07-13 19:29:09,954 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:29:09,955 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1093781434] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:29:09,955 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:29:09,955 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:29:09,955 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541349550] [2021-07-13 19:29:09,955 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:29:09,955 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:29:09,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:29:09,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:29:09,955 INFO L87 Difference]: Start difference. First operand 224 states and 616 transitions. Second operand has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:29:10,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:29:10,520 INFO L93 Difference]: Finished difference Result 325 states and 819 transitions. [2021-07-13 19:29:10,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 19:29:10,521 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-13 19:29:10,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:29:10,521 INFO L225 Difference]: With dead ends: 325 [2021-07-13 19:29:10,521 INFO L226 Difference]: Without dead ends: 322 [2021-07-13 19:29:10,522 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 550.4ms TimeCoverageRelationStatistics Valid=131, Invalid=571, Unknown=0, NotChecked=0, Total=702 [2021-07-13 19:29:10,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2021-07-13 19:29:10,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 226. [2021-07-13 19:29:10,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 225 states have (on average 2.7644444444444445) internal successors, (622), 225 states have internal predecessors, (622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:29:10,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 622 transitions. [2021-07-13 19:29:10,524 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 622 transitions. Word has length 15 [2021-07-13 19:29:10,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:29:10,525 INFO L482 AbstractCegarLoop]: Abstraction has 226 states and 622 transitions. [2021-07-13 19:29:10,525 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:29:10,525 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 622 transitions. [2021-07-13 19:29:10,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-13 19:29:10,525 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:29:10,525 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:29:10,740 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable615,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:29:10,741 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:29:10,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:29:10,741 INFO L82 PathProgramCache]: Analyzing trace with hash -1290354434, now seen corresponding path program 97 times [2021-07-13 19:29:10,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:29:10,741 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251134591] [2021-07-13 19:29:10,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:29:10,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:29:10,809 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:29:10,809 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:29:10,809 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251134591] [2021-07-13 19:29:10,809 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [251134591] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:29:10,809 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [146398357] [2021-07-13 19:29:10,809 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:29:10,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:29:10,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-13 19:29:10,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:29:10,906 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:29:10,906 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:29:10,907 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:29:10,907 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:29:10,910 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:29:10,910 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:29:10,910 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:29:10,911 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:29:10,913 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:29:10,913 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:29:10,913 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:29:10,914 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:29:10,917 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:29:10,917 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:29:10,918 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:29:10,949 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-07-13 19:29:10,949 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:29:10,950 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:29:10,950 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-07-13 19:29:10,994 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:29:10,994 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [146398357] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:29:10,994 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:29:10,994 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:29:10,994 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748618073] [2021-07-13 19:29:10,994 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:29:10,994 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:29:10,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:29:10,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:29:10,995 INFO L87 Difference]: Start difference. First operand 226 states and 622 transitions. Second operand has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:29:11,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:29:11,287 INFO L93 Difference]: Finished difference Result 314 states and 803 transitions. [2021-07-13 19:29:11,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:29:11,288 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-13 19:29:11,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:29:11,288 INFO L225 Difference]: With dead ends: 314 [2021-07-13 19:29:11,288 INFO L226 Difference]: Without dead ends: 314 [2021-07-13 19:29:11,288 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 295.6ms TimeCoverageRelationStatistics Valid=80, Invalid=300, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:29:11,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2021-07-13 19:29:11,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 223. [2021-07-13 19:29:11,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 222 states have (on average 2.7522522522522523) internal successors, (611), 222 states have internal predecessors, (611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:29:11,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 611 transitions. [2021-07-13 19:29:11,291 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 611 transitions. Word has length 15 [2021-07-13 19:29:11,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:29:11,291 INFO L482 AbstractCegarLoop]: Abstraction has 223 states and 611 transitions. [2021-07-13 19:29:11,291 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:29:11,291 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 611 transitions. [2021-07-13 19:29:11,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-13 19:29:11,292 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:29:11,292 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:29:11,493 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable621 [2021-07-13 19:29:11,493 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:29:11,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:29:11,493 INFO L82 PathProgramCache]: Analyzing trace with hash -1950902984, now seen corresponding path program 98 times [2021-07-13 19:29:11,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:29:11,494 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185168926] [2021-07-13 19:29:11,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:29:11,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:29:11,557 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:29:11,557 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:29:11,558 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185168926] [2021-07-13 19:29:11,558 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1185168926] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:29:11,558 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [37020489] [2021-07-13 19:29:11,558 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-07-13 19:29:11,583 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:29:11,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:29:11,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-13 19:29:11,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:29:11,674 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:29:11,674 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:29:11,675 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:29:11,675 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:29:11,677 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:29:11,678 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:29:11,678 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:29:11,700 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-07-13 19:29:11,700 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:29:11,700 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:29:11,700 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-07-13 19:29:11,718 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:29:11,718 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [37020489] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:29:11,718 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:29:11,718 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:29:11,718 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906275206] [2021-07-13 19:29:11,718 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:29:11,719 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:29:11,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:29:11,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:29:11,719 INFO L87 Difference]: Start difference. First operand 223 states and 611 transitions. Second operand has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:29:11,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:29:11,835 INFO L93 Difference]: Finished difference Result 269 states and 706 transitions. [2021-07-13 19:29:11,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:29:11,835 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-13 19:29:11,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:29:11,836 INFO L225 Difference]: With dead ends: 269 [2021-07-13 19:29:11,836 INFO L226 Difference]: Without dead ends: 269 [2021-07-13 19:29:11,836 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 116.3ms TimeCoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:29:11,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2021-07-13 19:29:11,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 228. [2021-07-13 19:29:11,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 227 states have (on average 2.748898678414097) internal successors, (624), 227 states have internal predecessors, (624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:29:11,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 624 transitions. [2021-07-13 19:29:11,839 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 624 transitions. Word has length 15 [2021-07-13 19:29:11,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:29:11,839 INFO L482 AbstractCegarLoop]: Abstraction has 228 states and 624 transitions. [2021-07-13 19:29:11,839 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:29:11,839 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 624 transitions. [2021-07-13 19:29:11,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-13 19:29:11,840 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:29:11,840 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:29:12,040 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable625,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:29:12,040 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:29:12,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:29:12,041 INFO L82 PathProgramCache]: Analyzing trace with hash -396853860, now seen corresponding path program 99 times [2021-07-13 19:29:12,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:29:12,041 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812612110] [2021-07-13 19:29:12,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:29:12,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:29:12,097 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:29:12,097 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:29:12,098 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812612110] [2021-07-13 19:29:12,098 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1812612110] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:29:12,098 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1164402500] [2021-07-13 19:29:12,098 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:29:12,123 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:29:12,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:29:12,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-13 19:29:12,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:29:12,244 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:29:12,245 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:29:12,248 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:29:12,248 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:29:12,251 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:29:12,252 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:29:12,254 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:29:12,255 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:29:12,257 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:29:12,258 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:29:12,260 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:29:12,261 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:29:12,261 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:29:12,262 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:29:12,264 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:29:12,265 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:29:12,297 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-07-13 19:29:12,297 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:29:12,298 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:29:12,298 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-07-13 19:29:12,323 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:29:12,323 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1164402500] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:29:12,323 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:29:12,323 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:29:12,323 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056357559] [2021-07-13 19:29:12,323 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:29:12,323 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:29:12,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:29:12,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:29:12,324 INFO L87 Difference]: Start difference. First operand 228 states and 624 transitions. Second operand has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:29:12,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:29:12,553 INFO L93 Difference]: Finished difference Result 261 states and 683 transitions. [2021-07-13 19:29:12,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:29:12,554 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-13 19:29:12,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:29:12,554 INFO L225 Difference]: With dead ends: 261 [2021-07-13 19:29:12,554 INFO L226 Difference]: Without dead ends: 258 [2021-07-13 19:29:12,554 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 247.7ms TimeCoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:29:12,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2021-07-13 19:29:12,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 229. [2021-07-13 19:29:12,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 228 states have (on average 2.736842105263158) internal successors, (624), 228 states have internal predecessors, (624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:29:12,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 624 transitions. [2021-07-13 19:29:12,557 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 624 transitions. Word has length 15 [2021-07-13 19:29:12,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:29:12,557 INFO L482 AbstractCegarLoop]: Abstraction has 229 states and 624 transitions. [2021-07-13 19:29:12,557 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:29:12,557 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 624 transitions. [2021-07-13 19:29:12,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-13 19:29:12,558 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:29:12,558 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:29:12,758 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable628 [2021-07-13 19:29:12,758 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:29:12,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:29:12,759 INFO L82 PathProgramCache]: Analyzing trace with hash -1711260646, now seen corresponding path program 100 times [2021-07-13 19:29:12,759 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:29:12,759 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677664945] [2021-07-13 19:29:12,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:29:12,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:29:12,814 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:29:12,814 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:29:12,815 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677664945] [2021-07-13 19:29:12,815 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677664945] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:29:12,815 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1877077134] [2021-07-13 19:29:12,815 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:29:12,839 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:29:12,840 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:29:12,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-13 19:29:12,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:29:12,938 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:29:12,939 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:29:12,939 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:29:12,940 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:29:12,942 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:29:12,942 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:29:12,943 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:29:12,963 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-07-13 19:29:12,964 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:29:12,964 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:29:12,964 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-07-13 19:29:12,981 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:29:12,981 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1877077134] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:29:12,981 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:29:12,982 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:29:12,982 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442607314] [2021-07-13 19:29:12,982 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:29:12,982 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:29:12,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:29:12,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:29:12,982 INFO L87 Difference]: Start difference. First operand 229 states and 624 transitions. Second operand has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:29:13,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:29:13,248 INFO L93 Difference]: Finished difference Result 268 states and 706 transitions. [2021-07-13 19:29:13,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:29:13,249 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-13 19:29:13,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:29:13,249 INFO L225 Difference]: With dead ends: 268 [2021-07-13 19:29:13,249 INFO L226 Difference]: Without dead ends: 268 [2021-07-13 19:29:13,249 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 262.7ms TimeCoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:29:13,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2021-07-13 19:29:13,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 228. [2021-07-13 19:29:13,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 227 states have (on average 2.753303964757709) internal successors, (625), 227 states have internal predecessors, (625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:29:13,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 625 transitions. [2021-07-13 19:29:13,258 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 625 transitions. Word has length 15 [2021-07-13 19:29:13,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:29:13,258 INFO L482 AbstractCegarLoop]: Abstraction has 228 states and 625 transitions. [2021-07-13 19:29:13,258 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:29:13,258 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 625 transitions. [2021-07-13 19:29:13,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-13 19:29:13,258 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:29:13,258 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:29:13,468 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable635 [2021-07-13 19:29:13,469 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:29:13,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:29:13,469 INFO L82 PathProgramCache]: Analyzing trace with hash 1664005942, now seen corresponding path program 101 times [2021-07-13 19:29:13,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:29:13,469 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2847824] [2021-07-13 19:29:13,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:29:13,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:29:13,527 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:29:13,528 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:29:13,528 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2847824] [2021-07-13 19:29:13,528 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2847824] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:29:13,528 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [509676866] [2021-07-13 19:29:13,528 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:29:13,553 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:29:13,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:29:13,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-13 19:29:13,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:29:13,663 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:29:13,664 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:29:13,666 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:29:13,667 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:29:13,667 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:29:13,668 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:29:13,670 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:29:13,671 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:29:13,673 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:29:13,674 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:29:13,676 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:29:13,676 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:29:13,676 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:29:13,677 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:29:13,679 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:29:13,680 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:29:13,709 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-07-13 19:29:13,709 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:29:13,710 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:29:13,710 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-07-13 19:29:13,734 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:29:13,734 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [509676866] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:29:13,734 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:29:13,734 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:29:13,734 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582279213] [2021-07-13 19:29:13,734 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:29:13,734 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:29:13,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:29:13,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:29:13,735 INFO L87 Difference]: Start difference. First operand 228 states and 625 transitions. Second operand has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:29:13,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:29:13,926 INFO L93 Difference]: Finished difference Result 256 states and 681 transitions. [2021-07-13 19:29:13,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:29:13,926 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-13 19:29:13,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:29:13,927 INFO L225 Difference]: With dead ends: 256 [2021-07-13 19:29:13,927 INFO L226 Difference]: Without dead ends: 254 [2021-07-13 19:29:13,927 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 208.1ms TimeCoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:29:13,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2021-07-13 19:29:13,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 229. [2021-07-13 19:29:13,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 228 states have (on average 2.75) internal successors, (627), 228 states have internal predecessors, (627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:29:13,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 627 transitions. [2021-07-13 19:29:13,930 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 627 transitions. Word has length 15 [2021-07-13 19:29:13,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:29:13,930 INFO L482 AbstractCegarLoop]: Abstraction has 229 states and 627 transitions. [2021-07-13 19:29:13,930 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:29:13,930 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 627 transitions. [2021-07-13 19:29:13,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-13 19:29:13,930 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:29:13,930 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:29:14,131 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable638,106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:29:14,131 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:29:14,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:29:14,131 INFO L82 PathProgramCache]: Analyzing trace with hash -1703530248, now seen corresponding path program 102 times [2021-07-13 19:29:14,131 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:29:14,131 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100991347] [2021-07-13 19:29:14,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:29:14,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:29:14,199 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:29:14,199 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:29:14,199 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100991347] [2021-07-13 19:29:14,199 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [100991347] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:29:14,199 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1295093576] [2021-07-13 19:29:14,199 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:29:14,226 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:29:14,227 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:29:14,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-13 19:29:14,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:29:14,300 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:29:14,300 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:29:14,300 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:29:14,301 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:29:14,303 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:29:14,304 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:29:14,304 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:29:14,305 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:29:14,307 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:29:14,307 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:29:14,307 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:29:14,308 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:29:14,310 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:29:14,310 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:29:14,311 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:29:14,342 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-07-13 19:29:14,343 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:29:14,343 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:29:14,343 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-07-13 19:29:14,395 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:29:14,396 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1295093576] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:29:14,396 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:29:14,396 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:29:14,396 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113045234] [2021-07-13 19:29:14,396 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:29:14,396 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:29:14,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:29:14,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:29:14,397 INFO L87 Difference]: Start difference. First operand 229 states and 627 transitions. Second operand has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:29:14,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:29:14,733 INFO L93 Difference]: Finished difference Result 326 states and 793 transitions. [2021-07-13 19:29:14,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:29:14,733 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-13 19:29:14,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:29:14,734 INFO L225 Difference]: With dead ends: 326 [2021-07-13 19:29:14,734 INFO L226 Difference]: Without dead ends: 326 [2021-07-13 19:29:14,734 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 326.0ms TimeCoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:29:14,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2021-07-13 19:29:14,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 229. [2021-07-13 19:29:14,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 228 states have (on average 2.754385964912281) internal successors, (628), 228 states have internal predecessors, (628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:29:14,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 628 transitions. [2021-07-13 19:29:14,737 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 628 transitions. Word has length 15 [2021-07-13 19:29:14,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:29:14,737 INFO L482 AbstractCegarLoop]: Abstraction has 229 states and 628 transitions. [2021-07-13 19:29:14,737 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:29:14,738 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 628 transitions. [2021-07-13 19:29:14,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-13 19:29:14,738 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:29:14,738 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:29:14,938 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable645,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:29:14,938 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:29:14,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:29:14,939 INFO L82 PathProgramCache]: Analyzing trace with hash -901914020, now seen corresponding path program 103 times [2021-07-13 19:29:14,939 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:29:14,939 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695637917] [2021-07-13 19:29:14,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:29:14,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:29:14,999 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:29:15,000 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:29:15,000 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695637917] [2021-07-13 19:29:15,000 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1695637917] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:29:15,000 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1280560964] [2021-07-13 19:29:15,000 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:29:15,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:29:15,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-13 19:29:15,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:29:15,091 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:29:15,092 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:29:15,092 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:29:15,093 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:29:15,095 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:29:15,095 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:29:15,095 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:29:15,096 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:29:15,098 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:29:15,098 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:29:15,099 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:29:15,099 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:29:15,101 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:29:15,101 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:29:15,102 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:29:15,134 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-07-13 19:29:15,134 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:29:15,134 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:29:15,134 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-07-13 19:29:15,191 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:29:15,191 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1280560964] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:29:15,191 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:29:15,191 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:29:15,191 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366476066] [2021-07-13 19:29:15,191 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:29:15,191 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:29:15,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:29:15,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:29:15,192 INFO L87 Difference]: Start difference. First operand 229 states and 628 transitions. Second operand has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:29:15,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:29:15,501 INFO L93 Difference]: Finished difference Result 288 states and 732 transitions. [2021-07-13 19:29:15,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 19:29:15,502 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-13 19:29:15,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:29:15,502 INFO L225 Difference]: With dead ends: 288 [2021-07-13 19:29:15,502 INFO L226 Difference]: Without dead ends: 285 [2021-07-13 19:29:15,502 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 310.7ms TimeCoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:29:15,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2021-07-13 19:29:15,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 233. [2021-07-13 19:29:15,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 232 states have (on average 2.7629310344827585) internal successors, (641), 232 states have internal predecessors, (641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:29:15,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 641 transitions. [2021-07-13 19:29:15,505 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 641 transitions. Word has length 15 [2021-07-13 19:29:15,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:29:15,505 INFO L482 AbstractCegarLoop]: Abstraction has 233 states and 641 transitions. [2021-07-13 19:29:15,505 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:29:15,506 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 641 transitions. [2021-07-13 19:29:15,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-13 19:29:15,506 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:29:15,506 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:29:15,706 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable649,108 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:29:15,706 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:29:15,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:29:15,707 INFO L82 PathProgramCache]: Analyzing trace with hash 816429686, now seen corresponding path program 104 times [2021-07-13 19:29:15,707 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:29:15,707 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285595792] [2021-07-13 19:29:15,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:29:15,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:29:15,771 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:29:15,771 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:29:15,771 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285595792] [2021-07-13 19:29:15,771 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1285595792] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:29:15,771 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1896960744] [2021-07-13 19:29:15,772 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:29:15,795 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:29:15,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:29:15,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-13 19:29:15,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:29:15,869 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:29:15,869 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:29:15,870 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:29:15,870 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:29:15,872 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:29:15,873 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:29:15,873 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:29:15,874 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:29:15,876 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:29:15,876 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:29:15,876 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:29:15,877 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:29:15,879 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:29:15,879 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:29:15,880 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:29:15,912 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-07-13 19:29:15,912 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:29:15,912 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:29:15,912 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-07-13 19:29:15,956 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:29:15,956 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1896960744] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:29:15,956 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:29:15,956 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:29:15,957 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98890202] [2021-07-13 19:29:15,957 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:29:15,957 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:29:15,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:29:15,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:29:15,957 INFO L87 Difference]: Start difference. First operand 233 states and 641 transitions. Second operand has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:29:16,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:29:16,137 INFO L93 Difference]: Finished difference Result 286 states and 730 transitions. [2021-07-13 19:29:16,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:29:16,137 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-13 19:29:16,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:29:16,138 INFO L225 Difference]: With dead ends: 286 [2021-07-13 19:29:16,138 INFO L226 Difference]: Without dead ends: 286 [2021-07-13 19:29:16,138 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 210.6ms TimeCoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:29:16,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2021-07-13 19:29:16,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 229. [2021-07-13 19:29:16,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 228 states have (on average 2.75) internal successors, (627), 228 states have internal predecessors, (627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:29:16,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 627 transitions. [2021-07-13 19:29:16,141 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 627 transitions. Word has length 15 [2021-07-13 19:29:16,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:29:16,141 INFO L482 AbstractCegarLoop]: Abstraction has 229 states and 627 transitions. [2021-07-13 19:29:16,141 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:29:16,141 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 627 transitions. [2021-07-13 19:29:16,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-13 19:29:16,142 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:29:16,142 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:29:16,342 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable655,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:29:16,342 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:29:16,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:29:16,343 INFO L82 PathProgramCache]: Analyzing trace with hash -638175266, now seen corresponding path program 105 times [2021-07-13 19:29:16,343 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:29:16,343 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971036246] [2021-07-13 19:29:16,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:29:16,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:29:16,397 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:29:16,397 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:29:16,397 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971036246] [2021-07-13 19:29:16,397 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [971036246] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:29:16,398 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1093779449] [2021-07-13 19:29:16,398 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:29:16,422 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:29:16,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:29:16,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-13 19:29:16,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:29:16,513 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:29:16,514 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:29:16,520 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:29:16,521 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:29:16,524 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:29:16,524 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:29:16,525 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:29:16,546 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-07-13 19:29:16,547 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:29:16,547 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:29:16,547 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-07-13 19:29:16,564 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:29:16,564 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1093779449] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:29:16,565 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:29:16,565 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:29:16,565 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360695558] [2021-07-13 19:29:16,565 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:29:16,565 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:29:16,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:29:16,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:29:16,565 INFO L87 Difference]: Start difference. First operand 229 states and 627 transitions. Second operand has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:29:16,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:29:16,750 INFO L93 Difference]: Finished difference Result 290 states and 741 transitions. [2021-07-13 19:29:16,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:29:16,751 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-13 19:29:16,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:29:16,751 INFO L225 Difference]: With dead ends: 290 [2021-07-13 19:29:16,751 INFO L226 Difference]: Without dead ends: 290 [2021-07-13 19:29:16,751 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 148.7ms TimeCoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:29:16,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2021-07-13 19:29:16,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 229. [2021-07-13 19:29:16,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 228 states have (on average 2.75) internal successors, (627), 228 states have internal predecessors, (627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:29:16,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 627 transitions. [2021-07-13 19:29:16,764 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 627 transitions. Word has length 15 [2021-07-13 19:29:16,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:29:16,764 INFO L482 AbstractCegarLoop]: Abstraction has 229 states and 627 transitions. [2021-07-13 19:29:16,764 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:29:16,764 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 627 transitions. [2021-07-13 19:29:16,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-13 19:29:16,764 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:29:16,764 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:29:16,964 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable659 [2021-07-13 19:29:16,965 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:29:16,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:29:16,965 INFO L82 PathProgramCache]: Analyzing trace with hash -1557875974, now seen corresponding path program 106 times [2021-07-13 19:29:16,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:29:16,965 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678772783] [2021-07-13 19:29:16,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:29:16,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:29:17,018 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:29:17,018 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:29:17,019 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678772783] [2021-07-13 19:29:17,019 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [678772783] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:29:17,019 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [846214910] [2021-07-13 19:29:17,019 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:29:17,042 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:29:17,043 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:29:17,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-13 19:29:17,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:29:17,142 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:29:17,143 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:29:17,146 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:29:17,146 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:29:17,146 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:29:17,147 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:29:17,149 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:29:17,150 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:29:17,152 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:29:17,153 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:29:17,155 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:29:17,156 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:29:17,156 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:29:17,157 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:29:17,159 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:29:17,160 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:29:17,191 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-07-13 19:29:17,191 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:29:17,193 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:29:17,193 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-07-13 19:29:17,218 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:29:17,218 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [846214910] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:29:17,218 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:29:17,218 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:29:17,219 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754633345] [2021-07-13 19:29:17,219 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:29:17,219 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:29:17,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:29:17,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:29:17,219 INFO L87 Difference]: Start difference. First operand 229 states and 627 transitions. Second operand has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:29:17,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:29:17,584 INFO L93 Difference]: Finished difference Result 265 states and 692 transitions. [2021-07-13 19:29:17,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 19:29:17,584 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-13 19:29:17,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:29:17,585 INFO L225 Difference]: With dead ends: 265 [2021-07-13 19:29:17,585 INFO L226 Difference]: Without dead ends: 261 [2021-07-13 19:29:17,585 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 349.2ms TimeCoverageRelationStatistics Valid=97, Invalid=503, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:29:17,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2021-07-13 19:29:17,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 227. [2021-07-13 19:29:17,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 226 states have (on average 2.747787610619469) internal successors, (621), 226 states have internal predecessors, (621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:29:17,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 621 transitions. [2021-07-13 19:29:17,601 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 621 transitions. Word has length 15 [2021-07-13 19:29:17,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:29:17,601 INFO L482 AbstractCegarLoop]: Abstraction has 227 states and 621 transitions. [2021-07-13 19:29:17,601 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:29:17,601 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 621 transitions. [2021-07-13 19:29:17,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-13 19:29:17,601 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:29:17,602 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:29:17,802 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable662 [2021-07-13 19:29:17,802 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:29:17,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:29:17,802 INFO L82 PathProgramCache]: Analyzing trace with hash 977076318, now seen corresponding path program 107 times [2021-07-13 19:29:17,803 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:29:17,803 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123974059] [2021-07-13 19:29:17,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:29:17,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:29:17,860 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:29:17,860 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:29:17,860 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123974059] [2021-07-13 19:29:17,860 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [123974059] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:29:17,860 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1558981973] [2021-07-13 19:29:17,860 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:29:17,884 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:29:17,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:29:17,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-13 19:29:17,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:29:17,945 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:29:17,945 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:29:17,945 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:29:17,946 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:29:17,948 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:29:17,949 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:29:17,949 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:29:17,950 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:29:17,952 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:29:17,952 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:29:17,952 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:29:17,953 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:29:17,965 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:29:17,966 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:29:17,967 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:29:17,999 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-07-13 19:29:18,000 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:29:18,000 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:29:18,000 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-07-13 19:29:18,063 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:29:18,063 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1558981973] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:29:18,063 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:29:18,063 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:29:18,063 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102635566] [2021-07-13 19:29:18,063 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:29:18,063 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:29:18,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:29:18,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:29:18,064 INFO L87 Difference]: Start difference. First operand 227 states and 621 transitions. Second operand has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:29:18,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:29:18,567 INFO L93 Difference]: Finished difference Result 283 states and 713 transitions. [2021-07-13 19:29:18,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 19:29:18,567 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-13 19:29:18,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:29:18,568 INFO L225 Difference]: With dead ends: 283 [2021-07-13 19:29:18,568 INFO L226 Difference]: Without dead ends: 279 [2021-07-13 19:29:18,568 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 461.2ms TimeCoverageRelationStatistics Valid=115, Invalid=535, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:29:18,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2021-07-13 19:29:18,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 227. [2021-07-13 19:29:18,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 226 states have (on average 2.7389380530973453) internal successors, (619), 226 states have internal predecessors, (619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:29:18,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 619 transitions. [2021-07-13 19:29:18,571 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 619 transitions. Word has length 15 [2021-07-13 19:29:18,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:29:18,571 INFO L482 AbstractCegarLoop]: Abstraction has 227 states and 619 transitions. [2021-07-13 19:29:18,572 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:29:18,572 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 619 transitions. [2021-07-13 19:29:18,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-13 19:29:18,572 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:29:18,572 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:29:18,772 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable669 [2021-07-13 19:29:18,773 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:29:18,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:29:18,773 INFO L82 PathProgramCache]: Analyzing trace with hash -2119849864, now seen corresponding path program 108 times [2021-07-13 19:29:18,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:29:18,773 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756967848] [2021-07-13 19:29:18,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:29:18,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:29:18,834 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:29:18,835 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:29:18,835 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756967848] [2021-07-13 19:29:18,835 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1756967848] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:29:18,835 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [117033435] [2021-07-13 19:29:18,835 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:29:18,860 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:29:18,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:29:18,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-13 19:29:18,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:29:18,916 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:29:18,916 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:29:18,917 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:29:18,917 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:29:18,919 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:29:18,920 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:29:18,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:29:18,921 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:29:18,923 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:29:18,924 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:29:18,924 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:29:18,925 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:29:18,926 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:29:18,927 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:29:18,927 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:29:18,956 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-07-13 19:29:18,956 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:29:18,957 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:29:18,957 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-07-13 19:29:18,996 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:29:18,996 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [117033435] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:29:18,996 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:29:18,997 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:29:18,997 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365165677] [2021-07-13 19:29:18,997 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:29:18,997 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:29:18,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:29:18,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:29:18,997 INFO L87 Difference]: Start difference. First operand 227 states and 619 transitions. Second operand has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:29:19,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:29:19,359 INFO L93 Difference]: Finished difference Result 350 states and 828 transitions. [2021-07-13 19:29:19,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 19:29:19,360 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-13 19:29:19,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:29:19,360 INFO L225 Difference]: With dead ends: 350 [2021-07-13 19:29:19,361 INFO L226 Difference]: Without dead ends: 350 [2021-07-13 19:29:19,361 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 284.0ms TimeCoverageRelationStatistics Valid=97, Invalid=455, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:29:19,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2021-07-13 19:29:19,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 231. [2021-07-13 19:29:19,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 230 states have (on average 2.756521739130435) internal successors, (634), 230 states have internal predecessors, (634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:29:19,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 634 transitions. [2021-07-13 19:29:19,364 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 634 transitions. Word has length 15 [2021-07-13 19:29:19,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:29:19,364 INFO L482 AbstractCegarLoop]: Abstraction has 231 states and 634 transitions. [2021-07-13 19:29:19,364 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:29:19,364 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 634 transitions. [2021-07-13 19:29:19,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-13 19:29:19,364 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:29:19,365 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:29:19,580 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable674 [2021-07-13 19:29:19,581 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:29:19,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:29:19,581 INFO L82 PathProgramCache]: Analyzing trace with hash -1318233636, now seen corresponding path program 109 times [2021-07-13 19:29:19,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:29:19,581 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839424574] [2021-07-13 19:29:19,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:29:19,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:29:19,644 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:29:19,644 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:29:19,644 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839424574] [2021-07-13 19:29:19,644 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [839424574] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:29:19,644 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [647852961] [2021-07-13 19:29:19,644 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:29:19,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:29:19,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-13 19:29:19,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:29:19,742 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:29:19,743 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:29:19,743 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:29:19,744 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:29:19,746 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:29:19,746 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:29:19,748 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:29:19,749 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:29:19,751 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:29:19,751 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:29:19,751 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:29:19,752 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:29:19,754 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:29:19,754 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:29:19,755 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:29:19,785 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-07-13 19:29:19,785 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:29:19,786 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:29:19,786 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-07-13 19:29:19,841 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:29:19,841 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [647852961] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:29:19,841 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:29:19,841 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:29:19,841 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804638992] [2021-07-13 19:29:19,841 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:29:19,841 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:29:19,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:29:19,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:29:19,842 INFO L87 Difference]: Start difference. First operand 231 states and 634 transitions. Second operand has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:29:20,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:29:20,389 INFO L93 Difference]: Finished difference Result 340 states and 815 transitions. [2021-07-13 19:29:20,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-13 19:29:20,390 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-13 19:29:20,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:29:20,390 INFO L225 Difference]: With dead ends: 340 [2021-07-13 19:29:20,390 INFO L226 Difference]: Without dead ends: 332 [2021-07-13 19:29:20,391 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 480.5ms TimeCoverageRelationStatistics Valid=156, Invalid=900, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 19:29:20,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2021-07-13 19:29:20,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 236. [2021-07-13 19:29:20,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 235 states have (on average 2.753191489361702) internal successors, (647), 235 states have internal predecessors, (647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:29:20,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 647 transitions. [2021-07-13 19:29:20,394 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 647 transitions. Word has length 15 [2021-07-13 19:29:20,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:29:20,394 INFO L482 AbstractCegarLoop]: Abstraction has 236 states and 647 transitions. [2021-07-13 19:29:20,394 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:29:20,394 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 647 transitions. [2021-07-13 19:29:20,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-13 19:29:20,394 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:29:20,394 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:29:20,595 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable678 [2021-07-13 19:29:20,595 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:29:20,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:29:20,595 INFO L82 PathProgramCache]: Analyzing trace with hash 400110070, now seen corresponding path program 110 times [2021-07-13 19:29:20,596 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:29:20,596 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663978975] [2021-07-13 19:29:20,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:29:20,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:29:20,666 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:29:20,666 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:29:20,666 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663978975] [2021-07-13 19:29:20,666 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1663978975] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:29:20,666 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1601605966] [2021-07-13 19:29:20,666 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:29:20,691 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:29:20,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:29:20,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-13 19:29:20,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:29:20,749 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:29:20,749 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:29:20,750 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:29:20,750 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:29:20,753 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:29:20,753 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:29:20,753 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:29:20,754 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:29:20,756 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:29:20,756 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:29:20,756 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:29:20,757 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:29:20,759 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:29:20,759 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:29:20,760 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:29:20,792 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-07-13 19:29:20,792 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:29:20,792 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:29:20,793 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-07-13 19:29:20,836 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:29:20,836 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1601605966] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:29:20,836 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:29:20,836 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:29:20,837 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111021200] [2021-07-13 19:29:20,837 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:29:20,837 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:29:20,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:29:20,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:29:20,837 INFO L87 Difference]: Start difference. First operand 236 states and 647 transitions. Second operand has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:29:21,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:29:21,181 INFO L93 Difference]: Finished difference Result 335 states and 813 transitions. [2021-07-13 19:29:21,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 19:29:21,182 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-13 19:29:21,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:29:21,182 INFO L225 Difference]: With dead ends: 335 [2021-07-13 19:29:21,182 INFO L226 Difference]: Without dead ends: 335 [2021-07-13 19:29:21,183 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 314.9ms TimeCoverageRelationStatistics Valid=95, Invalid=457, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:29:21,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2021-07-13 19:29:21,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 234. [2021-07-13 19:29:21,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 233 states have (on average 2.7381974248927037) internal successors, (638), 233 states have internal predecessors, (638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:29:21,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 638 transitions. [2021-07-13 19:29:21,185 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 638 transitions. Word has length 15 [2021-07-13 19:29:21,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:29:21,186 INFO L482 AbstractCegarLoop]: Abstraction has 234 states and 638 transitions. [2021-07-13 19:29:21,186 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:29:21,186 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 638 transitions. [2021-07-13 19:29:21,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-13 19:29:21,186 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:29:21,186 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:29:21,386 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable684,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:29:21,387 INFO L430 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:29:21,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:29:21,387 INFO L82 PathProgramCache]: Analyzing trace with hash -1310503238, now seen corresponding path program 111 times [2021-07-13 19:29:21,387 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:29:21,387 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650769613] [2021-07-13 19:29:21,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:29:21,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:29:21,450 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:29:21,450 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:29:21,450 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650769613] [2021-07-13 19:29:21,450 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1650769613] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:29:21,450 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [809221595] [2021-07-13 19:29:21,450 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:29:21,475 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:29:21,476 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:29:21,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-13 19:29:21,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:29:21,558 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:29:21,559 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:29:21,559 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:29:21,560 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:29:21,562 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:29:21,562 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:29:21,563 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:29:21,579 INFO L628 ElimStorePlain]: treesize reduction 30, result has 33.3 percent of original size [2021-07-13 19:29:21,579 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:29:21,580 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:29:21,580 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:59, output treesize:15 [2021-07-13 19:29:21,599 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:29:21,600 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [809221595] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:29:21,600 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:29:21,600 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:29:21,600 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524041921] [2021-07-13 19:29:21,600 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:29:21,600 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:29:21,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:29:21,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:29:21,600 INFO L87 Difference]: Start difference. First operand 234 states and 638 transitions. Second operand has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:29:21,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:29:21,763 INFO L93 Difference]: Finished difference Result 339 states and 822 transitions. [2021-07-13 19:29:21,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 19:29:21,764 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-13 19:29:21,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:29:21,764 INFO L225 Difference]: With dead ends: 339 [2021-07-13 19:29:21,764 INFO L226 Difference]: Without dead ends: 339 [2021-07-13 19:29:21,765 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 149.4ms TimeCoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:29:21,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2021-07-13 19:29:21,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 234. [2021-07-13 19:29:21,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 233 states have (on average 2.7381974248927037) internal successors, (638), 233 states have internal predecessors, (638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:29:21,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 638 transitions. [2021-07-13 19:29:21,768 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 638 transitions. Word has length 15 [2021-07-13 19:29:21,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:29:21,768 INFO L482 AbstractCegarLoop]: Abstraction has 234 states and 638 transitions. [2021-07-13 19:29:21,768 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:29:21,768 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 638 transitions. [2021-07-13 19:29:21,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-13 19:29:21,768 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:29:21,768 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:29:21,969 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable688 [2021-07-13 19:29:21,969 INFO L430 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:29:21,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:29:21,969 INFO L82 PathProgramCache]: Analyzing trace with hash -1065104704, now seen corresponding path program 112 times [2021-07-13 19:29:21,970 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:29:21,970 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593735599] [2021-07-13 19:29:21,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:29:21,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:29:22,032 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:29:22,032 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:29:22,032 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593735599] [2021-07-13 19:29:22,032 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1593735599] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:29:22,033 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1617063365] [2021-07-13 19:29:22,033 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:29:22,061 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:29:22,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:29:22,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-13 19:29:22,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:29:22,166 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:29:22,167 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:29:22,167 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:29:22,168 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:29:22,170 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:29:22,170 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:29:22,171 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:29:22,192 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-07-13 19:29:22,192 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:29:22,192 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:29:22,193 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-07-13 19:29:22,210 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:29:22,210 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1617063365] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:29:22,210 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:29:22,210 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 19:29:22,210 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027938278] [2021-07-13 19:29:22,210 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:29:22,211 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:29:22,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:29:22,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:29:22,211 INFO L87 Difference]: Start difference. First operand 234 states and 638 transitions. Second operand has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:29:22,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:29:22,362 INFO L93 Difference]: Finished difference Result 326 states and 807 transitions. [2021-07-13 19:29:22,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:29:22,362 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-13 19:29:22,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:29:22,363 INFO L225 Difference]: With dead ends: 326 [2021-07-13 19:29:22,363 INFO L226 Difference]: Without dead ends: 326 [2021-07-13 19:29:22,363 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 124.5ms TimeCoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:29:22,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2021-07-13 19:29:22,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 252. [2021-07-13 19:29:22,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 251 states have (on average 2.752988047808765) internal successors, (691), 251 states have internal predecessors, (691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:29:22,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 691 transitions. [2021-07-13 19:29:22,366 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 691 transitions. Word has length 15 [2021-07-13 19:29:22,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:29:22,366 INFO L482 AbstractCegarLoop]: Abstraction has 252 states and 691 transitions. [2021-07-13 19:29:22,366 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:29:22,366 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 691 transitions. [2021-07-13 19:29:22,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-13 19:29:22,367 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:29:22,367 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:29:22,582 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable690,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:29:22,582 INFO L430 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:29:22,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:29:22,582 INFO L82 PathProgramCache]: Analyzing trace with hash 488944420, now seen corresponding path program 113 times [2021-07-13 19:29:22,582 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:29:22,582 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271468411] [2021-07-13 19:29:22,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:29:22,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:29:22,640 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:29:22,640 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:29:22,640 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271468411] [2021-07-13 19:29:22,640 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1271468411] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:29:22,640 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1491443065] [2021-07-13 19:29:22,640 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:29:22,667 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:29:22,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:29:22,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-13 19:29:22,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:29:22,784 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:29:22,785 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:29:22,788 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:29:22,788 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:29:22,788 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:29:22,789 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:29:22,791 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:29:22,792 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:29:22,793 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:29:22,794 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:29:22,796 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:29:22,797 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:29:22,797 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:29:22,798 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:29:22,800 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:29:22,800 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:29:22,828 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-07-13 19:29:22,828 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:29:22,829 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:29:22,829 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-07-13 19:29:22,852 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:29:22,852 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1491443065] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:29:22,852 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:29:22,852 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 19:29:22,853 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285034728] [2021-07-13 19:29:22,853 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:29:22,853 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:29:22,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:29:22,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:29:22,853 INFO L87 Difference]: Start difference. First operand 252 states and 691 transitions. Second operand has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:29:23,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:29:23,224 INFO L93 Difference]: Finished difference Result 306 states and 765 transitions. [2021-07-13 19:29:23,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 19:29:23,224 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-13 19:29:23,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:29:23,225 INFO L225 Difference]: With dead ends: 306 [2021-07-13 19:29:23,225 INFO L226 Difference]: Without dead ends: 303 [2021-07-13 19:29:23,225 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 322.1ms TimeCoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:29:23,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2021-07-13 19:29:23,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 255. [2021-07-13 19:29:23,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 254 states have (on average 2.736220472440945) internal successors, (695), 254 states have internal predecessors, (695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:29:23,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 695 transitions. [2021-07-13 19:29:23,229 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 695 transitions. Word has length 15 [2021-07-13 19:29:23,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:29:23,229 INFO L482 AbstractCegarLoop]: Abstraction has 255 states and 695 transitions. [2021-07-13 19:29:23,229 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:29:23,229 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 695 transitions. [2021-07-13 19:29:23,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-13 19:29:23,229 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:29:23,229 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:29:23,433 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable693,118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:29:23,433 INFO L430 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:29:23,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:29:23,433 INFO L82 PathProgramCache]: Analyzing trace with hash -825462366, now seen corresponding path program 114 times [2021-07-13 19:29:23,433 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:29:23,433 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120172200] [2021-07-13 19:29:23,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:29:23,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:29:23,494 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:29:23,494 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:29:23,494 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120172200] [2021-07-13 19:29:23,494 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1120172200] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:29:23,494 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [890830019] [2021-07-13 19:29:23,494 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:29:23,519 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:29:23,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:29:23,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-13 19:29:23,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:29:23,626 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:29:23,627 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:29:23,627 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:29:23,628 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:29:23,630 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:29:23,630 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:29:23,631 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:29:23,655 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-07-13 19:29:23,655 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:29:23,656 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:29:23,656 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-07-13 19:29:23,674 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:29:23,674 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [890830019] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:29:23,674 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:29:23,674 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 19:29:23,674 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350417249] [2021-07-13 19:29:23,675 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:29:23,675 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:29:23,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:29:23,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:29:23,675 INFO L87 Difference]: Start difference. First operand 255 states and 695 transitions. Second operand has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:29:24,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:29:24,065 INFO L93 Difference]: Finished difference Result 335 states and 825 transitions. [2021-07-13 19:29:24,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 19:29:24,075 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-13 19:29:24,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:29:24,075 INFO L225 Difference]: With dead ends: 335 [2021-07-13 19:29:24,075 INFO L226 Difference]: Without dead ends: 335 [2021-07-13 19:29:24,076 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 376.6ms TimeCoverageRelationStatistics Valid=117, Invalid=639, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:29:24,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2021-07-13 19:29:24,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 251. [2021-07-13 19:29:24,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 251 states, 250 states have (on average 2.756) internal successors, (689), 250 states have internal predecessors, (689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:29:24,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 689 transitions. [2021-07-13 19:29:24,079 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 689 transitions. Word has length 15 [2021-07-13 19:29:24,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:29:24,079 INFO L482 AbstractCegarLoop]: Abstraction has 251 states and 689 transitions. [2021-07-13 19:29:24,079 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:29:24,079 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 689 transitions. [2021-07-13 19:29:24,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-13 19:29:24,080 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:29:24,080 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:29:24,288 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable700 [2021-07-13 19:29:24,289 INFO L430 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:29:24,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:29:24,289 INFO L82 PathProgramCache]: Analyzing trace with hash -1745163074, now seen corresponding path program 115 times [2021-07-13 19:29:24,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:29:24,289 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069545473] [2021-07-13 19:29:24,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:29:24,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:29:24,343 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:29:24,343 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:29:24,343 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069545473] [2021-07-13 19:29:24,343 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1069545473] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:29:24,343 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1217957927] [2021-07-13 19:29:24,344 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:29:24,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:29:24,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-13 19:29:24,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:29:24,499 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:29:24,500 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:29:24,502 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:29:24,503 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:29:24,503 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:29:24,503 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:29:24,505 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:29:24,506 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:29:24,508 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:29:24,509 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:29:24,511 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:29:24,511 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:29:24,512 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:29:24,513 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:29:24,514 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:29:24,515 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:29:24,541 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-07-13 19:29:24,541 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:29:24,542 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:29:24,542 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-07-13 19:29:24,565 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:29:24,565 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1217957927] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:29:24,565 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:29:24,565 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 19:29:24,565 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341306990] [2021-07-13 19:29:24,566 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:29:24,566 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:29:24,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:29:24,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:29:24,566 INFO L87 Difference]: Start difference. First operand 251 states and 689 transitions. Second operand has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:29:24,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:29:24,990 INFO L93 Difference]: Finished difference Result 297 states and 755 transitions. [2021-07-13 19:29:24,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 19:29:24,991 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-13 19:29:24,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:29:24,991 INFO L225 Difference]: With dead ends: 297 [2021-07-13 19:29:24,991 INFO L226 Difference]: Without dead ends: 295 [2021-07-13 19:29:24,991 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 390.6ms TimeCoverageRelationStatistics Valid=101, Invalid=549, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:29:24,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2021-07-13 19:29:24,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 252. [2021-07-13 19:29:24,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 251 states have (on average 2.752988047808765) internal successors, (691), 251 states have internal predecessors, (691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:29:24,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 691 transitions. [2021-07-13 19:29:24,995 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 691 transitions. Word has length 15 [2021-07-13 19:29:24,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:29:24,995 INFO L482 AbstractCegarLoop]: Abstraction has 252 states and 691 transitions. [2021-07-13 19:29:24,995 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:29:24,995 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 691 transitions. [2021-07-13 19:29:24,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-13 19:29:24,995 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:29:24,995 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:29:25,209 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable703,120 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:29:25,210 INFO L430 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:29:25,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:29:25,210 INFO L82 PathProgramCache]: Analyzing trace with hash -817731968, now seen corresponding path program 116 times [2021-07-13 19:29:25,210 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:29:25,210 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862294436] [2021-07-13 19:29:25,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:29:25,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:29:25,272 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:29:25,273 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:29:25,273 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862294436] [2021-07-13 19:29:25,273 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1862294436] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:29:25,273 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [402942236] [2021-07-13 19:29:25,273 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:29:25,297 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:29:25,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:29:25,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-13 19:29:25,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:29:25,379 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:29:25,380 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:29:25,383 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:29:25,384 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:29:25,386 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:29:25,386 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:29:25,387 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:29:25,387 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:29:25,389 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:29:25,390 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:29:25,390 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:29:25,391 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:29:25,393 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:29:25,393 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:29:25,394 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:29:25,425 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-07-13 19:29:25,426 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:29:25,426 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:29:25,426 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-07-13 19:29:25,470 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:29:25,470 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [402942236] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:29:25,470 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:29:25,470 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 19:29:25,470 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075832279] [2021-07-13 19:29:25,470 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:29:25,471 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:29:25,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:29:25,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:29:25,471 INFO L87 Difference]: Start difference. First operand 252 states and 691 transitions. Second operand has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:29:25,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:29:25,831 INFO L93 Difference]: Finished difference Result 342 states and 814 transitions. [2021-07-13 19:29:25,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 19:29:25,832 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-13 19:29:25,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:29:25,832 INFO L225 Difference]: With dead ends: 342 [2021-07-13 19:29:25,832 INFO L226 Difference]: Without dead ends: 341 [2021-07-13 19:29:25,833 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 366.7ms TimeCoverageRelationStatistics Valid=107, Invalid=493, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:29:25,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 341 states. [2021-07-13 19:29:25,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 341 to 243. [2021-07-13 19:29:25,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 242 states have (on average 2.727272727272727) internal successors, (660), 242 states have internal predecessors, (660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:29:25,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 660 transitions. [2021-07-13 19:29:25,835 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 660 transitions. Word has length 15 [2021-07-13 19:29:25,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:29:25,836 INFO L482 AbstractCegarLoop]: Abstraction has 243 states and 660 transitions. [2021-07-13 19:29:25,836 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:29:25,836 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 660 transitions. [2021-07-13 19:29:25,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-13 19:29:25,836 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:29:25,836 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:29:26,040 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable710,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:29:26,041 INFO L430 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:29:26,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:29:26,041 INFO L82 PathProgramCache]: Analyzing trace with hash -16115740, now seen corresponding path program 117 times [2021-07-13 19:29:26,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:29:26,041 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181710615] [2021-07-13 19:29:26,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:29:26,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:29:26,105 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:29:26,105 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:29:26,105 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181710615] [2021-07-13 19:29:26,105 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [181710615] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:29:26,105 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [300155284] [2021-07-13 19:29:26,106 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:29:26,132 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:29:26,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:29:26,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-13 19:29:26,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:29:26,210 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:29:26,211 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:29:26,211 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:29:26,212 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:29:26,214 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:29:26,214 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:29:26,214 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:29:26,215 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:29:26,217 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:29:26,218 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:29:26,218 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:29:26,218 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:29:26,220 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:29:26,221 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:29:26,222 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:29:26,253 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-07-13 19:29:26,253 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:29:26,253 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:29:26,254 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-07-13 19:29:26,318 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:29:26,318 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [300155284] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:29:26,318 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:29:26,318 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 19:29:26,318 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60639884] [2021-07-13 19:29:26,318 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:29:26,318 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:29:26,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:29:26,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:29:26,319 INFO L87 Difference]: Start difference. First operand 243 states and 660 transitions. Second operand has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:29:26,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:29:26,760 INFO L93 Difference]: Finished difference Result 308 states and 761 transitions. [2021-07-13 19:29:26,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 19:29:26,761 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-13 19:29:26,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:29:26,761 INFO L225 Difference]: With dead ends: 308 [2021-07-13 19:29:26,761 INFO L226 Difference]: Without dead ends: 304 [2021-07-13 19:29:26,762 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 420.2ms TimeCoverageRelationStatistics Valid=105, Invalid=545, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:29:26,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2021-07-13 19:29:26,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 247. [2021-07-13 19:29:26,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 246 states have (on average 2.7357723577235773) internal successors, (673), 246 states have internal predecessors, (673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:29:26,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 673 transitions. [2021-07-13 19:29:26,765 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 673 transitions. Word has length 15 [2021-07-13 19:29:26,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:29:26,765 INFO L482 AbstractCegarLoop]: Abstraction has 247 states and 673 transitions. [2021-07-13 19:29:26,765 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:29:26,765 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 673 transitions. [2021-07-13 19:29:26,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-13 19:29:26,765 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:29:26,765 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:29:26,965 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable714 [2021-07-13 19:29:26,966 INFO L430 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:29:26,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:29:26,966 INFO L82 PathProgramCache]: Analyzing trace with hash 1702227966, now seen corresponding path program 118 times [2021-07-13 19:29:26,966 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:29:26,966 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669930897] [2021-07-13 19:29:26,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:29:26,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:29:27,032 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:29:27,032 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:29:27,032 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669930897] [2021-07-13 19:29:27,032 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1669930897] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:29:27,032 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1600434329] [2021-07-13 19:29:27,032 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:29:27,058 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:29:27,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:29:27,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-13 19:29:27,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:29:27,136 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:29:27,137 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:29:27,137 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:29:27,137 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:29:27,140 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:29:27,140 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:29:27,140 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:29:27,141 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:29:27,143 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:29:27,143 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:29:27,144 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:29:27,144 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:29:27,146 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:29:27,146 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:29:27,147 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:29:27,179 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-07-13 19:29:27,179 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:29:27,180 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:29:27,180 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-07-13 19:29:27,226 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:29:27,227 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1600434329] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:29:27,227 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:29:27,227 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 19:29:27,227 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362734920] [2021-07-13 19:29:27,227 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:29:27,227 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:29:27,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:29:27,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:29:27,228 INFO L87 Difference]: Start difference. First operand 247 states and 673 transitions. Second operand has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:29:27,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:29:27,463 INFO L93 Difference]: Finished difference Result 299 states and 749 transitions. [2021-07-13 19:29:27,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:29:27,464 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-13 19:29:27,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:29:27,464 INFO L225 Difference]: With dead ends: 299 [2021-07-13 19:29:27,465 INFO L226 Difference]: Without dead ends: 299 [2021-07-13 19:29:27,465 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 252.6ms TimeCoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:29:27,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2021-07-13 19:29:27,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 236. [2021-07-13 19:29:27,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 235 states have (on average 2.7148936170212767) internal successors, (638), 235 states have internal predecessors, (638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:29:27,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 638 transitions. [2021-07-13 19:29:27,468 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 638 transitions. Word has length 15 [2021-07-13 19:29:27,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:29:27,468 INFO L482 AbstractCegarLoop]: Abstraction has 236 states and 638 transitions. [2021-07-13 19:29:27,468 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:29:27,468 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 638 transitions. [2021-07-13 19:29:27,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-13 19:29:27,468 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:29:27,468 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:29:27,668 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable720,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:29:27,669 INFO L430 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:29:27,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:29:27,669 INFO L82 PathProgramCache]: Analyzing trace with hash -846468574, now seen corresponding path program 119 times [2021-07-13 19:29:27,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:29:27,669 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543178320] [2021-07-13 19:29:27,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:29:27,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:29:27,717 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:29:27,717 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:29:27,717 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543178320] [2021-07-13 19:29:27,717 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1543178320] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:29:27,717 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [60545442] [2021-07-13 19:29:27,717 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:29:27,744 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:29:27,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:29:27,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-13 19:29:27,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:29:27,835 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:29:27,835 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:29:27,836 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:29:27,836 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:29:27,838 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:29:27,839 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:29:27,839 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:29:27,860 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-07-13 19:29:27,860 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:29:27,861 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:29:27,861 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-07-13 19:29:27,878 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:29:27,878 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [60545442] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:29:27,878 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:29:27,878 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-07-13 19:29:27,878 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925491897] [2021-07-13 19:29:27,879 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:29:27,879 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:29:27,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:29:27,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:29:27,879 INFO L87 Difference]: Start difference. First operand 236 states and 638 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:29:28,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:29:28,001 INFO L93 Difference]: Finished difference Result 299 states and 753 transitions. [2021-07-13 19:29:28,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:29:28,001 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-13 19:29:28,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:29:28,002 INFO L225 Difference]: With dead ends: 299 [2021-07-13 19:29:28,002 INFO L226 Difference]: Without dead ends: 299 [2021-07-13 19:29:28,002 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 108.1ms TimeCoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:29:28,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2021-07-13 19:29:28,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 241. [2021-07-13 19:29:28,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 240 states have (on average 2.7291666666666665) internal successors, (655), 240 states have internal predecessors, (655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:29:28,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 655 transitions. [2021-07-13 19:29:28,005 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 655 transitions. Word has length 15 [2021-07-13 19:29:28,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:29:28,005 INFO L482 AbstractCegarLoop]: Abstraction has 241 states and 655 transitions. [2021-07-13 19:29:28,005 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:29:28,005 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 655 transitions. [2021-07-13 19:29:28,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-13 19:29:28,006 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:29:28,006 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:29:28,206 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable724,124 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:29:28,206 INFO L430 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:29:28,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:29:28,206 INFO L82 PathProgramCache]: Analyzing trace with hash -1766169282, now seen corresponding path program 120 times [2021-07-13 19:29:28,207 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:29:28,207 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406697515] [2021-07-13 19:29:28,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:29:28,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:29:28,257 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:29:28,257 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:29:28,258 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406697515] [2021-07-13 19:29:28,258 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406697515] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:29:28,258 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [576621755] [2021-07-13 19:29:28,258 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:29:28,284 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:29:28,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:29:28,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-13 19:29:28,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:29:28,393 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:29:28,394 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:29:28,396 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:29:28,396 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:29:28,397 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:29:28,397 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:29:28,400 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:29:28,400 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:29:28,402 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:29:28,403 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:29:28,406 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:29:28,406 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:29:28,408 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:29:28,409 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:29:28,411 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:29:28,412 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:29:28,442 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-07-13 19:29:28,442 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:29:28,443 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:29:28,443 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-07-13 19:29:28,467 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:29:28,468 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [576621755] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:29:28,468 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:29:28,468 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-07-13 19:29:28,468 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256130923] [2021-07-13 19:29:28,468 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:29:28,468 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:29:28,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:29:28,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:29:28,468 INFO L87 Difference]: Start difference. First operand 241 states and 655 transitions. Second operand has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:29:28,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:29:28,726 INFO L93 Difference]: Finished difference Result 275 states and 703 transitions. [2021-07-13 19:29:28,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:29:28,726 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-13 19:29:28,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:29:28,726 INFO L225 Difference]: With dead ends: 275 [2021-07-13 19:29:28,727 INFO L226 Difference]: Without dead ends: 271 [2021-07-13 19:29:28,727 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 256.4ms TimeCoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:29:28,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2021-07-13 19:29:28,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 241. [2021-07-13 19:29:28,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 240 states have (on average 2.720833333333333) internal successors, (653), 240 states have internal predecessors, (653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:29:28,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 653 transitions. [2021-07-13 19:29:28,730 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 653 transitions. Word has length 15 [2021-07-13 19:29:28,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:29:28,730 INFO L482 AbstractCegarLoop]: Abstraction has 241 states and 653 transitions. [2021-07-13 19:29:28,730 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:29:28,730 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 653 transitions. [2021-07-13 19:29:28,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-13 19:29:28,730 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:29:28,730 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:29:28,930 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable727,125 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:29:28,931 INFO L430 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:29:28,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:29:28,931 INFO L82 PathProgramCache]: Analyzing trace with hash -838738176, now seen corresponding path program 121 times [2021-07-13 19:29:28,931 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:29:28,931 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520924896] [2021-07-13 19:29:28,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:29:28,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:29:28,980 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:29:28,980 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:29:28,980 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520924896] [2021-07-13 19:29:28,980 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1520924896] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:29:28,980 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [315930331] [2021-07-13 19:29:28,980 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:29:29,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:29:29,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-13 19:29:29,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:29:29,071 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:29:29,071 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:29:29,072 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:29:29,072 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:29:29,075 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:29:29,075 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:29:29,075 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:29:29,076 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:29:29,078 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:29:29,078 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:29:29,079 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:29:29,079 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:29:29,081 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:29:29,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:29:29,082 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:29:29,114 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-07-13 19:29:29,114 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:29:29,114 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:29:29,114 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-07-13 19:29:29,157 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:29:29,157 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [315930331] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:29:29,157 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:29:29,157 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-07-13 19:29:29,158 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604547209] [2021-07-13 19:29:29,158 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:29:29,158 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:29:29,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:29:29,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:29:29,158 INFO L87 Difference]: Start difference. First operand 241 states and 653 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:29:29,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:29:29,380 INFO L93 Difference]: Finished difference Result 314 states and 767 transitions. [2021-07-13 19:29:29,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 19:29:29,380 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-13 19:29:29,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:29:29,381 INFO L225 Difference]: With dead ends: 314 [2021-07-13 19:29:29,381 INFO L226 Difference]: Without dead ends: 314 [2021-07-13 19:29:29,381 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 212.3ms TimeCoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:29:29,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2021-07-13 19:29:29,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 243. [2021-07-13 19:29:29,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 242 states have (on average 2.727272727272727) internal successors, (660), 242 states have internal predecessors, (660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:29:29,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 660 transitions. [2021-07-13 19:29:29,384 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 660 transitions. Word has length 15 [2021-07-13 19:29:29,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:29:29,384 INFO L482 AbstractCegarLoop]: Abstraction has 243 states and 660 transitions. [2021-07-13 19:29:29,384 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:29:29,384 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 660 transitions. [2021-07-13 19:29:29,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-13 19:29:29,384 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:29:29,384 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:29:29,585 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable734 [2021-07-13 19:29:29,585 INFO L430 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:29:29,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:29:29,585 INFO L82 PathProgramCache]: Analyzing trace with hash -37121948, now seen corresponding path program 122 times [2021-07-13 19:29:29,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:29:29,585 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166550939] [2021-07-13 19:29:29,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:29:29,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:29:29,636 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:29:29,636 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:29:29,636 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166550939] [2021-07-13 19:29:29,636 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1166550939] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:29:29,636 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1659316585] [2021-07-13 19:29:29,636 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:29:29,660 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:29:29,661 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:29:29,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-13 19:29:29,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:29:29,725 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:29:29,725 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:29:29,725 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:29:29,726 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:29:29,728 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:29:29,729 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:29:29,729 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:29:29,729 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:29:29,731 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:29:29,732 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:29:29,732 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:29:29,733 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:29:29,735 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:29:29,735 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:29:29,736 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:29:29,767 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-07-13 19:29:29,767 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:29:29,768 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:29:29,768 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-07-13 19:29:29,824 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:29:29,825 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1659316585] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:29:29,825 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:29:29,825 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-07-13 19:29:29,825 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737516912] [2021-07-13 19:29:29,825 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:29:29,825 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:29:29,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:29:29,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:29:29,825 INFO L87 Difference]: Start difference. First operand 243 states and 660 transitions. Second operand has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:29:30,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:29:30,186 INFO L93 Difference]: Finished difference Result 292 states and 739 transitions. [2021-07-13 19:29:30,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 19:29:30,187 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-13 19:29:30,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:29:30,187 INFO L225 Difference]: With dead ends: 292 [2021-07-13 19:29:30,187 INFO L226 Difference]: Without dead ends: 289 [2021-07-13 19:29:30,188 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 321.2ms TimeCoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:29:30,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2021-07-13 19:29:30,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 246. [2021-07-13 19:29:30,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 245 states have (on average 2.7346938775510203) internal successors, (670), 245 states have internal predecessors, (670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:29:30,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 670 transitions. [2021-07-13 19:29:30,191 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 670 transitions. Word has length 15 [2021-07-13 19:29:30,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:29:30,191 INFO L482 AbstractCegarLoop]: Abstraction has 246 states and 670 transitions. [2021-07-13 19:29:30,191 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:29:30,191 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 670 transitions. [2021-07-13 19:29:30,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-13 19:29:30,191 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:29:30,191 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:29:30,392 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable738,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:29:30,395 INFO L430 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:29:30,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:29:30,395 INFO L82 PathProgramCache]: Analyzing trace with hash 1681221758, now seen corresponding path program 123 times [2021-07-13 19:29:30,395 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:29:30,395 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626154495] [2021-07-13 19:29:30,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:29:30,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:29:30,450 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:29:30,450 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:29:30,450 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626154495] [2021-07-13 19:29:30,450 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1626154495] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:29:30,450 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [348077162] [2021-07-13 19:29:30,450 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:29:30,480 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 19:29:30,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:29:30,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-13 19:29:30,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:29:30,542 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:29:30,543 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:29:30,543 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:29:30,544 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:29:30,546 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:29:30,546 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:29:30,546 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:29:30,547 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:29:30,549 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:29:30,549 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:29:30,550 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:29:30,550 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:29:30,552 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:29:30,553 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:29:30,554 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:29:30,585 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-07-13 19:29:30,585 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:29:30,586 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:29:30,586 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-07-13 19:29:30,630 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:29:30,630 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [348077162] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:29:30,630 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:29:30,630 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-07-13 19:29:30,630 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593180897] [2021-07-13 19:29:30,630 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:29:30,630 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:29:30,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:29:30,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:29:30,631 INFO L87 Difference]: Start difference. First operand 246 states and 670 transitions. Second operand has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:29:30,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:29:30,856 INFO L93 Difference]: Finished difference Result 286 states and 730 transitions. [2021-07-13 19:29:30,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:29:30,856 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-13 19:29:30,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:29:30,857 INFO L225 Difference]: With dead ends: 286 [2021-07-13 19:29:30,857 INFO L226 Difference]: Without dead ends: 286 [2021-07-13 19:29:30,857 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 199.4ms TimeCoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:29:30,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2021-07-13 19:29:30,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 241. [2021-07-13 19:29:30,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 240 states have (on average 2.7083333333333335) internal successors, (650), 240 states have internal predecessors, (650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:29:30,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 650 transitions. [2021-07-13 19:29:30,860 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 650 transitions. Word has length 15 [2021-07-13 19:29:30,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:29:30,860 INFO L482 AbstractCegarLoop]: Abstraction has 241 states and 650 transitions. [2021-07-13 19:29:30,860 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:29:30,860 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 650 transitions. [2021-07-13 19:29:30,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-13 19:29:30,861 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:29:30,861 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:29:31,061 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable744 [2021-07-13 19:29:31,061 INFO L430 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:29:31,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:29:31,062 INFO L82 PathProgramCache]: Analyzing trace with hash -1255057792, now seen corresponding path program 124 times [2021-07-13 19:29:31,062 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:29:31,062 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214281966] [2021-07-13 19:29:31,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:29:31,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:29:31,129 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:29:31,129 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:29:31,129 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214281966] [2021-07-13 19:29:31,129 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1214281966] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:29:31,129 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1896344514] [2021-07-13 19:29:31,130 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:29:31,158 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:29:31,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:29:31,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-13 19:29:31,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:29:31,235 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:29:31,235 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:29:31,235 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:29:31,236 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:29:31,238 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:29:31,239 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:29:31,239 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:29:31,240 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:29:31,242 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:29:31,242 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:29:31,242 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:29:31,243 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:29:31,245 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:29:31,245 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:29:31,246 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:29:31,278 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-07-13 19:29:31,278 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:29:31,279 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:29:31,279 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-07-13 19:29:31,329 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:29:31,330 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1896344514] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:29:31,330 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:29:31,330 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 19:29:31,330 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001544523] [2021-07-13 19:29:31,330 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:29:31,330 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:29:31,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:29:31,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:29:31,331 INFO L87 Difference]: Start difference. First operand 241 states and 650 transitions. Second operand has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:29:31,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:29:31,538 INFO L93 Difference]: Finished difference Result 321 states and 788 transitions. [2021-07-13 19:29:31,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:29:31,538 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-13 19:29:31,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:29:31,539 INFO L225 Difference]: With dead ends: 321 [2021-07-13 19:29:31,539 INFO L226 Difference]: Without dead ends: 321 [2021-07-13 19:29:31,539 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 232.4ms TimeCoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:29:31,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2021-07-13 19:29:31,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 245. [2021-07-13 19:29:31,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 244 states have (on average 2.7254098360655736) internal successors, (665), 244 states have internal predecessors, (665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:29:31,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 665 transitions. [2021-07-13 19:29:31,542 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 665 transitions. Word has length 15 [2021-07-13 19:29:31,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:29:31,542 INFO L482 AbstractCegarLoop]: Abstraction has 245 states and 665 transitions. [2021-07-13 19:29:31,542 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:29:31,542 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 665 transitions. [2021-07-13 19:29:31,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-13 19:29:31,543 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:29:31,543 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:29:31,743 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable748 [2021-07-13 19:29:31,743 INFO L430 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:29:31,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:29:31,744 INFO L82 PathProgramCache]: Analyzing trace with hash -453441564, now seen corresponding path program 125 times [2021-07-13 19:29:31,744 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:29:31,744 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016620982] [2021-07-13 19:29:31,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:29:31,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:29:31,812 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:29:31,813 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:29:31,813 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016620982] [2021-07-13 19:29:31,813 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2016620982] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:29:31,813 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [554471368] [2021-07-13 19:29:31,813 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:29:31,840 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:29:31,840 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:29:31,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-13 19:29:31,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:29:31,916 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:29:31,917 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:29:31,917 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:29:31,918 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:29:31,920 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:29:31,920 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:29:31,924 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:29:31,925 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:29:31,927 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:29:31,928 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:29:31,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:29:31,928 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:29:31,930 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:29:31,931 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:29:31,931 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:29:31,963 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-07-13 19:29:31,963 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:29:31,964 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:29:31,964 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-07-13 19:29:32,021 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:29:32,021 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [554471368] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:29:32,021 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:29:32,021 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 19:29:32,021 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517214653] [2021-07-13 19:29:32,021 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:29:32,021 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:29:32,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:29:32,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:29:32,022 INFO L87 Difference]: Start difference. First operand 245 states and 665 transitions. Second operand has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:29:32,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:29:32,534 INFO L93 Difference]: Finished difference Result 330 states and 799 transitions. [2021-07-13 19:29:32,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-13 19:29:32,535 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-13 19:29:32,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:29:32,535 INFO L225 Difference]: With dead ends: 330 [2021-07-13 19:29:32,536 INFO L226 Difference]: Without dead ends: 322 [2021-07-13 19:29:32,536 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 487.7ms TimeCoverageRelationStatistics Valid=127, Invalid=685, Unknown=0, NotChecked=0, Total=812 [2021-07-13 19:29:32,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2021-07-13 19:29:32,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 251. [2021-07-13 19:29:32,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 251 states, 250 states have (on average 2.728) internal successors, (682), 250 states have internal predecessors, (682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:29:32,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 682 transitions. [2021-07-13 19:29:32,539 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 682 transitions. Word has length 15 [2021-07-13 19:29:32,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:29:32,539 INFO L482 AbstractCegarLoop]: Abstraction has 251 states and 682 transitions. [2021-07-13 19:29:32,539 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:29:32,539 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 682 transitions. [2021-07-13 19:29:32,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-13 19:29:32,540 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:29:32,540 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:29:32,756 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable752 [2021-07-13 19:29:32,756 INFO L430 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:29:32,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:29:32,757 INFO L82 PathProgramCache]: Analyzing trace with hash 1264902142, now seen corresponding path program 126 times [2021-07-13 19:29:32,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:29:32,757 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600363927] [2021-07-13 19:29:32,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:29:32,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:29:32,831 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:29:32,831 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:29:32,831 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600363927] [2021-07-13 19:29:32,831 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1600363927] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:29:32,832 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [778842993] [2021-07-13 19:29:32,832 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:29:32,857 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:29:32,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:29:32,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-13 19:29:32,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:29:32,952 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:29:32,953 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:29:32,953 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:29:32,954 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:29:32,956 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:29:32,956 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:29:32,956 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:29:32,957 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:29:32,959 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:29:32,959 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:29:32,960 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:29:32,960 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:29:32,962 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:29:32,963 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:29:32,963 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:29:32,996 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-07-13 19:29:32,996 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:29:32,997 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:29:32,997 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-07-13 19:29:33,042 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:29:33,043 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [778842993] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:29:33,043 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:29:33,043 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 19:29:33,043 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126084961] [2021-07-13 19:29:33,043 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:29:33,043 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:29:33,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:29:33,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:29:33,043 INFO L87 Difference]: Start difference. First operand 251 states and 682 transitions. Second operand has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:29:33,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:29:33,380 INFO L93 Difference]: Finished difference Result 330 states and 831 transitions. [2021-07-13 19:29:33,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 19:29:33,381 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-13 19:29:33,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:29:33,381 INFO L225 Difference]: With dead ends: 330 [2021-07-13 19:29:33,381 INFO L226 Difference]: Without dead ends: 330 [2021-07-13 19:29:33,382 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 360.1ms TimeCoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:29:33,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2021-07-13 19:29:33,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 265. [2021-07-13 19:29:33,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 264 states have (on average 2.746212121212121) internal successors, (725), 264 states have internal predecessors, (725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:29:33,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 725 transitions. [2021-07-13 19:29:33,385 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 725 transitions. Word has length 15 [2021-07-13 19:29:33,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:29:33,385 INFO L482 AbstractCegarLoop]: Abstraction has 265 states and 725 transitions. [2021-07-13 19:29:33,385 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:29:33,385 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 725 transitions. [2021-07-13 19:29:33,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-13 19:29:33,385 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:29:33,385 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:29:33,586 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable758,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:29:33,586 INFO L430 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:29:33,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:29:33,586 INFO L82 PathProgramCache]: Analyzing trace with hash -445711166, now seen corresponding path program 127 times [2021-07-13 19:29:33,586 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:29:33,586 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470798626] [2021-07-13 19:29:33,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:29:33,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:29:33,655 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:29:33,656 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:29:33,656 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470798626] [2021-07-13 19:29:33,656 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1470798626] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:29:33,656 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [299147728] [2021-07-13 19:29:33,656 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:29:33,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:29:33,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-13 19:29:33,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:29:33,778 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:29:33,779 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:29:33,779 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:29:33,780 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:29:33,782 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:29:33,782 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:29:33,783 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:29:33,800 INFO L628 ElimStorePlain]: treesize reduction 30, result has 33.3 percent of original size [2021-07-13 19:29:33,801 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:29:33,801 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:29:33,801 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:59, output treesize:15 [2021-07-13 19:29:33,822 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:29:33,822 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [299147728] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:29:33,822 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:29:33,822 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 19:29:33,822 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787121494] [2021-07-13 19:29:33,822 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:29:33,822 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:29:33,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:29:33,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:29:33,822 INFO L87 Difference]: Start difference. First operand 265 states and 725 transitions. Second operand has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:29:34,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:29:34,237 INFO L93 Difference]: Finished difference Result 361 states and 878 transitions. [2021-07-13 19:29:34,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 19:29:34,238 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-13 19:29:34,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:29:34,239 INFO L225 Difference]: With dead ends: 361 [2021-07-13 19:29:34,239 INFO L226 Difference]: Without dead ends: 361 [2021-07-13 19:29:34,239 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 389.6ms TimeCoverageRelationStatistics Valid=122, Invalid=634, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:29:34,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361 states. [2021-07-13 19:29:34,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361 to 256. [2021-07-13 19:29:34,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 255 states have (on average 2.7294117647058824) internal successors, (696), 255 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:29:34,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 696 transitions. [2021-07-13 19:29:34,242 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 696 transitions. Word has length 15 [2021-07-13 19:29:34,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:29:34,242 INFO L482 AbstractCegarLoop]: Abstraction has 256 states and 696 transitions. [2021-07-13 19:29:34,242 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:29:34,242 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 696 transitions. [2021-07-13 19:29:34,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-13 19:29:34,243 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:29:34,243 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:29:34,443 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable762 [2021-07-13 19:29:34,443 INFO L430 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:29:34,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:29:34,443 INFO L82 PathProgramCache]: Analyzing trace with hash -1935116162, now seen corresponding path program 128 times [2021-07-13 19:29:34,443 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:29:34,444 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513934348] [2021-07-13 19:29:34,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:29:34,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:29:34,505 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:29:34,505 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:29:34,505 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513934348] [2021-07-13 19:29:34,505 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1513934348] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:29:34,505 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [614186878] [2021-07-13 19:29:34,505 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:29:34,531 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:29:34,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:29:34,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-13 19:29:34,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:29:34,635 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:29:34,636 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:29:34,636 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:29:34,637 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:29:34,639 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:29:34,639 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:29:34,640 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:29:34,660 INFO L628 ElimStorePlain]: treesize reduction 30, result has 33.3 percent of original size [2021-07-13 19:29:34,660 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:29:34,661 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:29:34,661 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:59, output treesize:15 [2021-07-13 19:29:34,685 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:29:34,685 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [614186878] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:29:34,685 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:29:34,685 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 19:29:34,685 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424162787] [2021-07-13 19:29:34,686 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:29:34,686 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:29:34,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:29:34,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:29:34,686 INFO L87 Difference]: Start difference. First operand 256 states and 696 transitions. Second operand has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:29:34,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:29:34,838 INFO L93 Difference]: Finished difference Result 323 states and 803 transitions. [2021-07-13 19:29:34,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:29:34,838 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-13 19:29:34,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:29:34,839 INFO L225 Difference]: With dead ends: 323 [2021-07-13 19:29:34,839 INFO L226 Difference]: Without dead ends: 323 [2021-07-13 19:29:34,839 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 148.0ms TimeCoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:29:34,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2021-07-13 19:29:34,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 235. [2021-07-13 19:29:34,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 234 states have (on average 2.6794871794871793) internal successors, (627), 234 states have internal predecessors, (627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:29:34,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 627 transitions. [2021-07-13 19:29:34,842 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 627 transitions. Word has length 15 [2021-07-13 19:29:34,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:29:34,842 INFO L482 AbstractCegarLoop]: Abstraction has 235 states and 627 transitions. [2021-07-13 19:29:34,842 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:29:34,842 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 627 transitions. [2021-07-13 19:29:34,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-13 19:29:34,842 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:29:34,842 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:29:35,043 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable764 [2021-07-13 19:29:35,043 INFO L430 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:29:35,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:29:35,043 INFO L82 PathProgramCache]: Analyzing trace with hash 757370424, now seen corresponding path program 129 times [2021-07-13 19:29:35,043 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:29:35,043 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696584706] [2021-07-13 19:29:35,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:29:35,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:29:35,552 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:29:35,553 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:29:35,553 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696584706] [2021-07-13 19:29:35,553 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1696584706] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:29:35,553 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [629697661] [2021-07-13 19:29:35,553 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:29:35,580 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:29:35,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:29:35,583 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 19:29:35,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:29:36,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:29:36,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:29:36,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:29:36,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:29:36,097 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:29:36,100 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:29:36,100 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 35 [2021-07-13 19:29:36,102 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:29:36,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:29:36,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:29:36,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:29:36,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:29:36,107 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:29:36,107 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 33 [2021-07-13 19:29:36,109 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:29:36,120 INFO L628 ElimStorePlain]: treesize reduction 99, result has 10.0 percent of original size [2021-07-13 19:29:36,120 INFO L518 ElimStorePlain]: Eliminatee v_prenex_65 vanished before elimination [2021-07-13 19:29:36,120 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:29:36,120 INFO L518 ElimStorePlain]: Eliminatee v_prenex_64 vanished before elimination [2021-07-13 19:29:36,121 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:29:36,121 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 6 variables, input treesize:173, output treesize:11 [2021-07-13 19:29:36,148 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:29:36,148 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [629697661] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:29:36,148 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:29:36,148 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-07-13 19:29:36,148 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402510535] [2021-07-13 19:29:36,148 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:29:36,148 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:29:36,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:29:36,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=269, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:29:36,149 INFO L87 Difference]: Start difference. First operand 235 states and 627 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:29:36,729 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 73 [2021-07-13 19:29:36,974 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 83 [2021-07-13 19:29:37,120 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 77 [2021-07-13 19:29:37,345 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 165 DAG size of output: 87 [2021-07-13 19:29:37,663 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 87 [2021-07-13 19:29:37,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:29:37,984 INFO L93 Difference]: Finished difference Result 362 states and 942 transitions. [2021-07-13 19:29:37,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 19:29:37,985 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-13 19:29:37,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:29:37,985 INFO L225 Difference]: With dead ends: 362 [2021-07-13 19:29:37,985 INFO L226 Difference]: Without dead ends: 359 [2021-07-13 19:29:37,986 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 9 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 2256.6ms TimeCoverageRelationStatistics Valid=128, Invalid=802, Unknown=0, NotChecked=0, Total=930 [2021-07-13 19:29:37,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2021-07-13 19:29:37,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 246. [2021-07-13 19:29:37,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 245 states have (on average 2.6653061224489796) internal successors, (653), 245 states have internal predecessors, (653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:29:37,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 653 transitions. [2021-07-13 19:29:37,989 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 653 transitions. Word has length 16 [2021-07-13 19:29:37,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:29:37,989 INFO L482 AbstractCegarLoop]: Abstraction has 246 states and 653 transitions. [2021-07-13 19:29:37,989 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:29:37,989 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 653 transitions. [2021-07-13 19:29:37,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-13 19:29:37,990 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:29:37,990 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:29:38,190 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable766 [2021-07-13 19:29:38,190 INFO L430 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:29:38,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:29:38,191 INFO L82 PathProgramCache]: Analyzing trace with hash -1098862454, now seen corresponding path program 130 times [2021-07-13 19:29:38,191 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:29:38,191 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111300508] [2021-07-13 19:29:38,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:29:38,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:29:38,371 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:29:38,371 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:29:38,371 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111300508] [2021-07-13 19:29:38,371 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2111300508] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:29:38,371 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [496284809] [2021-07-13 19:29:38,372 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:29:38,397 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:29:38,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:29:38,398 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 19:29:38,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:29:38,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:29:38,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:29:38,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:29:38,819 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:29:38,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:29:38,822 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:29:38,823 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 31 [2021-07-13 19:29:38,825 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:29:38,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:29:38,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:29:38,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:29:38,829 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:29:38,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:29:38,832 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:29:38,833 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 33 [2021-07-13 19:29:38,834 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:29:38,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:29:38,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:29:38,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:29:38,838 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:29:38,839 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 31 [2021-07-13 19:29:38,840 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:29:38,852 INFO L628 ElimStorePlain]: treesize reduction 66, result has 14.3 percent of original size [2021-07-13 19:29:38,852 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:29:38,852 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:29:38,852 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:161, output treesize:11 [2021-07-13 19:29:38,874 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:29:38,874 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [496284809] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:29:38,875 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:29:38,875 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-07-13 19:29:38,875 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964083220] [2021-07-13 19:29:38,875 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:29:38,875 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:29:38,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:29:38,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:29:38,875 INFO L87 Difference]: Start difference. First operand 246 states and 653 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:29:39,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:29:39,729 INFO L93 Difference]: Finished difference Result 334 states and 814 transitions. [2021-07-13 19:29:39,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 19:29:39,729 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-13 19:29:39,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:29:39,730 INFO L225 Difference]: With dead ends: 334 [2021-07-13 19:29:39,730 INFO L226 Difference]: Without dead ends: 327 [2021-07-13 19:29:39,730 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 1072.2ms TimeCoverageRelationStatistics Valid=130, Invalid=800, Unknown=0, NotChecked=0, Total=930 [2021-07-13 19:29:39,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2021-07-13 19:29:39,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 246. [2021-07-13 19:29:39,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 245 states have (on average 2.6897959183673468) internal successors, (659), 245 states have internal predecessors, (659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:29:39,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 659 transitions. [2021-07-13 19:29:39,733 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 659 transitions. Word has length 16 [2021-07-13 19:29:39,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:29:39,734 INFO L482 AbstractCegarLoop]: Abstraction has 246 states and 659 transitions. [2021-07-13 19:29:39,734 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:29:39,734 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 659 transitions. [2021-07-13 19:29:39,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-13 19:29:39,734 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:29:39,734 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:29:39,934 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 135 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable782 [2021-07-13 19:29:39,935 INFO L430 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:29:39,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:29:39,935 INFO L82 PathProgramCache]: Analyzing trace with hash -1091132056, now seen corresponding path program 131 times [2021-07-13 19:29:39,935 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:29:39,935 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378064400] [2021-07-13 19:29:39,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:29:39,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:29:40,245 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:29:40,245 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:29:40,245 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378064400] [2021-07-13 19:29:40,245 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1378064400] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:29:40,245 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [769774507] [2021-07-13 19:29:40,245 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:29:40,272 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:29:40,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:29:40,273 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 45 conjunts are in the unsatisfiable core [2021-07-13 19:29:40,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:29:40,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:29:40,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:29:40,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:29:40,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:29:40,694 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:29:40,696 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:29:40,697 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 33 [2021-07-13 19:29:40,698 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:29:40,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:29:40,702 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:29:40,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:29:40,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:29:40,704 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:29:40,705 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 33 [2021-07-13 19:29:40,707 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:29:40,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:29:40,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:29:40,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:29:40,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:29:40,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:29:40,713 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:29:40,716 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:29:40,717 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 25 [2021-07-13 19:29:40,718 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:29:40,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:29:40,721 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:29:40,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:29:40,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:29:40,723 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 41 [2021-07-13 19:29:40,724 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:29:40,785 INFO L628 ElimStorePlain]: treesize reduction 95, result has 45.4 percent of original size [2021-07-13 19:29:40,787 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:29:40,788 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-13 19:29:40,788 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:29:40,811 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:29:40,813 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:29:40,813 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 4 variables, input treesize:301, output treesize:56 [2021-07-13 19:29:40,887 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:29:40,888 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [769774507] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:29:40,888 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:29:40,888 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-13 19:29:40,888 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70192851] [2021-07-13 19:29:40,888 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:29:40,888 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:29:40,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:29:40,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:29:40,888 INFO L87 Difference]: Start difference. First operand 246 states and 659 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:29:41,268 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 51 [2021-07-13 19:29:41,611 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 68 [2021-07-13 19:29:41,779 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 67 [2021-07-13 19:29:42,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:29:42,102 INFO L93 Difference]: Finished difference Result 358 states and 879 transitions. [2021-07-13 19:29:42,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 19:29:42,113 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-13 19:29:42,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:29:42,113 INFO L225 Difference]: With dead ends: 358 [2021-07-13 19:29:42,113 INFO L226 Difference]: Without dead ends: 351 [2021-07-13 19:29:42,114 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 1529.9ms TimeCoverageRelationStatistics Valid=121, Invalid=691, Unknown=0, NotChecked=0, Total=812 [2021-07-13 19:29:42,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2021-07-13 19:29:42,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 258. [2021-07-13 19:29:42,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 258 states, 257 states have (on average 2.7315175097276265) internal successors, (702), 257 states have internal predecessors, (702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:29:42,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 702 transitions. [2021-07-13 19:29:42,117 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 702 transitions. Word has length 16 [2021-07-13 19:29:42,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:29:42,117 INFO L482 AbstractCegarLoop]: Abstraction has 258 states and 702 transitions. [2021-07-13 19:29:42,117 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:29:42,117 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 702 transitions. [2021-07-13 19:29:42,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-13 19:29:42,117 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:29:42,117 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:29:42,324 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable811 [2021-07-13 19:29:42,325 INFO L430 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:29:42,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:29:42,325 INFO L82 PathProgramCache]: Analyzing trace with hash 1714430244, now seen corresponding path program 132 times [2021-07-13 19:29:42,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:29:42,325 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511002990] [2021-07-13 19:29:42,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:29:42,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:29:42,577 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:29:42,577 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:29:42,577 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511002990] [2021-07-13 19:29:42,577 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1511002990] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:29:42,578 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1745014046] [2021-07-13 19:29:42,578 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:29:42,605 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:29:42,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:29:42,606 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 45 conjunts are in the unsatisfiable core [2021-07-13 19:29:42,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:29:42,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:29:42,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:29:42,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:29:42,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:29:42,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:29:42,952 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:29:42,957 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:29:42,957 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 33 [2021-07-13 19:29:42,959 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:29:42,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:29:42,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:29:42,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:29:42,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:29:42,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:29:42,965 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:29:42,969 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:29:42,969 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 33 [2021-07-13 19:29:42,970 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:29:42,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:29:42,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:29:42,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:29:42,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:29:42,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:29:42,976 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:29:42,980 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:29:42,980 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 25 [2021-07-13 19:29:42,981 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:29:42,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:29:42,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:29:42,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:29:42,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:29:42,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:29:42,990 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:29:42,991 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 41 [2021-07-13 19:29:42,992 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:29:43,051 INFO L628 ElimStorePlain]: treesize reduction 85, result has 43.3 percent of original size [2021-07-13 19:29:43,053 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:29:43,053 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-13 19:29:43,054 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:29:43,076 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:29:43,077 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:29:43,077 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 2 variables, input treesize:273, output treesize:54 [2021-07-13 19:29:43,143 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:29:43,144 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1745014046] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:29:43,144 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:29:43,144 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-07-13 19:29:43,144 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207313662] [2021-07-13 19:29:43,144 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:29:43,144 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:29:43,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:29:43,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:29:43,144 INFO L87 Difference]: Start difference. First operand 258 states and 702 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:29:43,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:29:43,954 INFO L93 Difference]: Finished difference Result 317 states and 820 transitions. [2021-07-13 19:29:43,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 19:29:43,954 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-13 19:29:43,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:29:43,955 INFO L225 Difference]: With dead ends: 317 [2021-07-13 19:29:43,955 INFO L226 Difference]: Without dead ends: 309 [2021-07-13 19:29:43,956 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 8 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 1059.9ms TimeCoverageRelationStatistics Valid=93, Invalid=609, Unknown=0, NotChecked=0, Total=702 [2021-07-13 19:29:43,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2021-07-13 19:29:43,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 264. [2021-07-13 19:29:43,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 263 states have (on average 2.7338403041825097) internal successors, (719), 263 states have internal predecessors, (719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:29:43,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 719 transitions. [2021-07-13 19:29:43,959 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 719 transitions. Word has length 16 [2021-07-13 19:29:43,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:29:43,959 INFO L482 AbstractCegarLoop]: Abstraction has 264 states and 719 transitions. [2021-07-13 19:29:43,959 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:29:43,959 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 719 transitions. [2021-07-13 19:29:43,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-13 19:29:43,959 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:29:43,959 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:29:44,172 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable824,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:29:44,173 INFO L430 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:29:44,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:29:44,173 INFO L82 PathProgramCache]: Analyzing trace with hash -1507451672, now seen corresponding path program 133 times [2021-07-13 19:29:44,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:29:44,173 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809009237] [2021-07-13 19:29:44,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:29:44,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:29:44,422 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:29:44,422 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:29:44,422 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809009237] [2021-07-13 19:29:44,423 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1809009237] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:29:44,423 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1685734621] [2021-07-13 19:29:44,423 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:29:44,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:29:44,449 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 19:29:44,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:29:44,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:29:44,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:29:44,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:29:44,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:29:44,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:29:44,864 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:29:44,865 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 33 [2021-07-13 19:29:44,866 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:29:44,883 INFO L628 ElimStorePlain]: treesize reduction 133, result has 7.6 percent of original size [2021-07-13 19:29:44,883 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:29:44,883 INFO L518 ElimStorePlain]: Eliminatee v_prenex_69 vanished before elimination [2021-07-13 19:29:44,883 INFO L518 ElimStorePlain]: Eliminatee v_prenex_68 vanished before elimination [2021-07-13 19:29:44,884 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:29:44,884 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:173, output treesize:11 [2021-07-13 19:29:44,892 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:29:44,893 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1685734621] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:29:44,893 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:29:44,893 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 17 [2021-07-13 19:29:44,893 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203530319] [2021-07-13 19:29:44,893 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:29:44,893 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:29:44,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:29:44,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=238, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:29:44,893 INFO L87 Difference]: Start difference. First operand 264 states and 719 transitions. Second operand has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:29:45,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:29:45,913 INFO L93 Difference]: Finished difference Result 331 states and 859 transitions. [2021-07-13 19:29:45,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 19:29:45,913 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-13 19:29:45,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:29:45,914 INFO L225 Difference]: With dead ends: 331 [2021-07-13 19:29:45,914 INFO L226 Difference]: Without dead ends: 327 [2021-07-13 19:29:45,914 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 1173.8ms TimeCoverageRelationStatistics Valid=86, Invalid=616, Unknown=0, NotChecked=0, Total=702 [2021-07-13 19:29:45,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2021-07-13 19:29:45,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 264. [2021-07-13 19:29:45,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 263 states have (on average 2.7338403041825097) internal successors, (719), 263 states have internal predecessors, (719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:29:45,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 719 transitions. [2021-07-13 19:29:45,917 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 719 transitions. Word has length 16 [2021-07-13 19:29:45,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:29:45,917 INFO L482 AbstractCegarLoop]: Abstraction has 264 states and 719 transitions. [2021-07-13 19:29:45,917 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:29:45,917 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 719 transitions. [2021-07-13 19:29:45,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-13 19:29:45,918 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:29:45,918 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:29:46,118 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable834 [2021-07-13 19:29:46,118 INFO L430 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:29:46,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:29:46,119 INFO L82 PathProgramCache]: Analyzing trace with hash 608535494, now seen corresponding path program 134 times [2021-07-13 19:29:46,119 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:29:46,119 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929411964] [2021-07-13 19:29:46,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:29:46,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:29:46,646 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:29:46,646 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:29:46,646 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929411964] [2021-07-13 19:29:46,646 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [929411964] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:29:46,646 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1792030891] [2021-07-13 19:29:46,646 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:29:46,673 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:29:46,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:29:46,674 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 45 conjunts are in the unsatisfiable core [2021-07-13 19:29:46,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:29:47,179 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:29:47,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:29:47,181 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:29:47,183 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 31 [2021-07-13 19:29:47,184 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:29:47,187 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:29:47,189 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:29:47,190 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 29 [2021-07-13 19:29:47,191 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:29:47,194 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:29:47,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:29:47,195 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:29:47,197 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 29 [2021-07-13 19:29:47,199 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:29:47,201 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:29:47,201 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-07-13 19:29:47,203 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:29:47,218 INFO L628 ElimStorePlain]: treesize reduction 73, result has 17.0 percent of original size [2021-07-13 19:29:47,218 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:29:47,219 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:29:47,219 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:181, output treesize:11 [2021-07-13 19:29:47,251 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:29:47,251 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1792030891] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:29:47,251 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:29:47,251 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 20 [2021-07-13 19:29:47,251 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662062786] [2021-07-13 19:29:47,251 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 19:29:47,252 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:29:47,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 19:29:47,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:29:47,252 INFO L87 Difference]: Start difference. First operand 264 states and 719 transitions. Second operand has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:29:48,011 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 64 [2021-07-13 19:29:48,252 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 67 [2021-07-13 19:29:48,641 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 66 [2021-07-13 19:29:48,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:29:48,757 INFO L93 Difference]: Finished difference Result 355 states and 883 transitions. [2021-07-13 19:29:48,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-13 19:29:48,758 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-13 19:29:48,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:29:48,758 INFO L225 Difference]: With dead ends: 355 [2021-07-13 19:29:48,758 INFO L226 Difference]: Without dead ends: 342 [2021-07-13 19:29:48,758 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 2000.2ms TimeCoverageRelationStatistics Valid=134, Invalid=922, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 19:29:48,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2021-07-13 19:29:48,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 286. [2021-07-13 19:29:48,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 285 states have (on average 2.7578947368421054) internal successors, (786), 285 states have internal predecessors, (786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:29:48,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 786 transitions. [2021-07-13 19:29:48,762 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 786 transitions. Word has length 16 [2021-07-13 19:29:48,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:29:48,762 INFO L482 AbstractCegarLoop]: Abstraction has 286 states and 786 transitions. [2021-07-13 19:29:48,762 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:29:48,762 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 786 transitions. [2021-07-13 19:29:48,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-13 19:29:48,762 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:29:48,762 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:29:48,963 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable851 [2021-07-13 19:29:48,963 INFO L430 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:29:48,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:29:48,963 INFO L82 PathProgramCache]: Analyzing trace with hash 855908230, now seen corresponding path program 135 times [2021-07-13 19:29:48,963 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:29:48,963 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180951776] [2021-07-13 19:29:48,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:29:48,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:29:49,077 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:29:49,078 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:29:49,078 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180951776] [2021-07-13 19:29:49,078 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1180951776] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:29:49,078 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1234264278] [2021-07-13 19:29:49,078 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:29:49,104 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-13 19:29:49,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:29:49,105 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 19:29:49,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:29:49,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:29:49,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:29:49,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:29:49,608 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:29:49,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:29:49,611 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:29:49,612 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 33 [2021-07-13 19:29:49,613 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:29:49,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:29:49,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:29:49,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:29:49,618 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:29:49,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:29:49,619 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 31 [2021-07-13 19:29:49,620 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:29:49,632 INFO L628 ElimStorePlain]: treesize reduction 91, result has 10.8 percent of original size [2021-07-13 19:29:49,632 INFO L518 ElimStorePlain]: Eliminatee v_prenex_71 vanished before elimination [2021-07-13 19:29:49,632 INFO L518 ElimStorePlain]: Eliminatee array_0 vanished before elimination [2021-07-13 19:29:49,632 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:29:49,633 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:29:49,633 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 6 variables, input treesize:161, output treesize:11 [2021-07-13 19:29:49,641 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:29:49,642 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1234264278] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:29:49,642 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:29:49,642 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-07-13 19:29:49,642 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904994781] [2021-07-13 19:29:49,642 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:29:49,642 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:29:49,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:29:49,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:29:49,642 INFO L87 Difference]: Start difference. First operand 286 states and 786 transitions. Second operand has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:29:50,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:29:50,422 INFO L93 Difference]: Finished difference Result 346 states and 891 transitions. [2021-07-13 19:29:50,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:29:50,423 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-13 19:29:50,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:29:50,423 INFO L225 Difference]: With dead ends: 346 [2021-07-13 19:29:50,423 INFO L226 Difference]: Without dead ends: 342 [2021-07-13 19:29:50,424 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 1022.7ms TimeCoverageRelationStatistics Valid=102, Invalid=548, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:29:50,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2021-07-13 19:29:50,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 275. [2021-07-13 19:29:50,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 274 states have (on average 2.7445255474452557) internal successors, (752), 274 states have internal predecessors, (752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:29:50,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 752 transitions. [2021-07-13 19:29:50,427 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 752 transitions. Word has length 16 [2021-07-13 19:29:50,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:29:50,427 INFO L482 AbstractCegarLoop]: Abstraction has 275 states and 752 transitions. [2021-07-13 19:29:50,427 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:29:50,427 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 752 transitions. [2021-07-13 19:29:50,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-13 19:29:50,428 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:29:50,428 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:29:50,628 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable881 [2021-07-13 19:29:50,628 INFO L430 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:29:50,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:29:50,629 INFO L82 PathProgramCache]: Analyzing trace with hash 827171624, now seen corresponding path program 136 times [2021-07-13 19:29:50,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:29:50,629 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546419136] [2021-07-13 19:29:50,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:29:50,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:29:50,812 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:29:50,813 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:29:50,813 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546419136] [2021-07-13 19:29:50,813 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [546419136] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:29:50,813 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [762160133] [2021-07-13 19:29:50,813 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:29:50,839 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:29:50,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:29:50,840 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 19:29:50,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:29:51,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:29:51,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:29:51,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:29:51,249 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:29:51,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:29:51,252 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:29:51,253 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 31 [2021-07-13 19:29:51,254 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:29:51,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:29:51,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:29:51,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:29:51,259 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:29:51,261 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:29:51,262 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 31 [2021-07-13 19:29:51,263 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:29:51,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:29:51,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:29:51,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:29:51,267 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:29:51,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:29:51,268 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 33 [2021-07-13 19:29:51,270 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:29:51,281 INFO L628 ElimStorePlain]: treesize reduction 72, result has 13.3 percent of original size [2021-07-13 19:29:51,281 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:29:51,282 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:29:51,282 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:161, output treesize:11 [2021-07-13 19:29:51,304 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:29:51,304 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [762160133] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:29:51,304 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:29:51,304 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-07-13 19:29:51,304 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212625835] [2021-07-13 19:29:51,304 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:29:51,304 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:29:51,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:29:51,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:29:51,304 INFO L87 Difference]: Start difference. First operand 275 states and 752 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:29:51,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:29:51,899 INFO L93 Difference]: Finished difference Result 399 states and 1002 transitions. [2021-07-13 19:29:51,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:29:51,899 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-13 19:29:51,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:29:51,900 INFO L225 Difference]: With dead ends: 399 [2021-07-13 19:29:51,900 INFO L226 Difference]: Without dead ends: 396 [2021-07-13 19:29:51,900 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 760.4ms TimeCoverageRelationStatistics Valid=90, Invalid=510, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:29:51,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 396 states. [2021-07-13 19:29:51,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 396 to 307. [2021-07-13 19:29:51,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 306 states have (on average 2.810457516339869) internal successors, (860), 306 states have internal predecessors, (860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:29:51,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 860 transitions. [2021-07-13 19:29:51,904 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 860 transitions. Word has length 16 [2021-07-13 19:29:51,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:29:51,904 INFO L482 AbstractCegarLoop]: Abstraction has 307 states and 860 transitions. [2021-07-13 19:29:51,904 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:29:51,904 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 860 transitions. [2021-07-13 19:29:51,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-13 19:29:51,905 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:29:51,905 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:29:52,105 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable902,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:29:52,106 INFO L430 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:29:52,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:29:52,106 INFO L82 PathProgramCache]: Analyzing trace with hash 418582406, now seen corresponding path program 137 times [2021-07-13 19:29:52,106 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:29:52,106 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371002105] [2021-07-13 19:29:52,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:29:52,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:29:52,284 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:29:52,285 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:29:52,285 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371002105] [2021-07-13 19:29:52,285 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1371002105] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:29:52,285 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1929806198] [2021-07-13 19:29:52,285 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:29:52,314 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:29:52,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:29:52,314 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 19:29:52,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:29:52,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:29:52,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:29:52,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:29:52,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:29:52,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:29:52,719 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:29:52,720 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 33 [2021-07-13 19:29:52,721 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:29:52,738 INFO L628 ElimStorePlain]: treesize reduction 129, result has 7.9 percent of original size [2021-07-13 19:29:52,738 INFO L518 ElimStorePlain]: Eliminatee v_prenex_75 vanished before elimination [2021-07-13 19:29:52,738 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:29:52,738 INFO L518 ElimStorePlain]: Eliminatee v_prenex_74 vanished before elimination [2021-07-13 19:29:52,738 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:29:52,738 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:173, output treesize:11 [2021-07-13 19:29:52,747 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:29:52,747 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1929806198] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:29:52,747 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:29:52,747 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-13 19:29:52,748 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619582400] [2021-07-13 19:29:52,748 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:29:52,748 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:29:52,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:29:52,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:29:52,748 INFO L87 Difference]: Start difference. First operand 307 states and 860 transitions. Second operand has 16 states, 16 states have (on average 1.4375) internal successors, (23), 16 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:29:53,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:29:53,354 INFO L93 Difference]: Finished difference Result 349 states and 941 transitions. [2021-07-13 19:29:53,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:29:53,354 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.4375) internal successors, (23), 16 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-13 19:29:53,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:29:53,355 INFO L225 Difference]: With dead ends: 349 [2021-07-13 19:29:53,355 INFO L226 Difference]: Without dead ends: 346 [2021-07-13 19:29:53,355 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 791.4ms TimeCoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:29:53,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2021-07-13 19:29:53,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 307. [2021-07-13 19:29:53,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 306 states have (on average 2.810457516339869) internal successors, (860), 306 states have internal predecessors, (860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:29:53,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 860 transitions. [2021-07-13 19:29:53,359 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 860 transitions. Word has length 16 [2021-07-13 19:29:53,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:29:53,359 INFO L482 AbstractCegarLoop]: Abstraction has 307 states and 860 transitions. [2021-07-13 19:29:53,359 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.4375) internal successors, (23), 16 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:29:53,359 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 860 transitions. [2021-07-13 19:29:53,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-13 19:29:53,360 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:29:53,360 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:29:53,572 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable924 [2021-07-13 19:29:53,573 INFO L430 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:29:53,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:29:53,573 INFO L82 PathProgramCache]: Analyzing trace with hash 1998264330, now seen corresponding path program 138 times [2021-07-13 19:29:53,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:29:53,573 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13785120] [2021-07-13 19:29:53,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:29:53,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:29:53,927 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:29:53,927 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:29:53,927 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13785120] [2021-07-13 19:29:53,927 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [13785120] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:29:53,927 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1173037925] [2021-07-13 19:29:53,927 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:29:53,955 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:29:53,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:29:53,956 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 45 conjunts are in the unsatisfiable core [2021-07-13 19:29:53,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:29:54,404 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:29:54,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:29:54,406 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:29:54,407 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 37 [2021-07-13 19:29:54,409 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:29:54,412 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:29:54,413 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:29:54,415 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 29 [2021-07-13 19:29:54,416 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:29:54,419 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:29:54,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:29:54,420 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:29:54,423 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 29 [2021-07-13 19:29:54,424 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:29:54,427 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:29:54,427 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-07-13 19:29:54,428 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:29:54,445 INFO L628 ElimStorePlain]: treesize reduction 83, result has 15.3 percent of original size [2021-07-13 19:29:54,446 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:29:54,446 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:29:54,446 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:189, output treesize:11 [2021-07-13 19:29:54,472 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:29:54,472 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1173037925] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:29:54,473 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:29:54,473 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 20 [2021-07-13 19:29:54,473 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787159739] [2021-07-13 19:29:54,473 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 19:29:54,473 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:29:54,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 19:29:54,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:29:54,473 INFO L87 Difference]: Start difference. First operand 307 states and 860 transitions. Second operand has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:29:54,869 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 57 [2021-07-13 19:29:55,075 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 57 [2021-07-13 19:29:55,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:29:55,237 INFO L93 Difference]: Finished difference Result 351 states and 930 transitions. [2021-07-13 19:29:55,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:29:55,238 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-13 19:29:55,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:29:55,238 INFO L225 Difference]: With dead ends: 351 [2021-07-13 19:29:55,239 INFO L226 Difference]: Without dead ends: 348 [2021-07-13 19:29:55,239 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 1171.8ms TimeCoverageRelationStatistics Valid=87, Invalid=563, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:29:55,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2021-07-13 19:29:55,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 320. [2021-07-13 19:29:55,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 320 states, 319 states have (on average 2.793103448275862) internal successors, (891), 319 states have internal predecessors, (891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:29:55,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 891 transitions. [2021-07-13 19:29:55,242 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 891 transitions. Word has length 16 [2021-07-13 19:29:55,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:29:55,242 INFO L482 AbstractCegarLoop]: Abstraction has 320 states and 891 transitions. [2021-07-13 19:29:55,242 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:29:55,243 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 891 transitions. [2021-07-13 19:29:55,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-13 19:29:55,243 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:29:55,243 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:29:55,456 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable941 [2021-07-13 19:29:55,457 INFO L430 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:29:55,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:29:55,457 INFO L82 PathProgramCache]: Analyzing trace with hash 837242216, now seen corresponding path program 139 times [2021-07-13 19:29:55,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:29:55,457 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635341569] [2021-07-13 19:29:55,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:29:55,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:29:55,643 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:29:55,643 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:29:55,643 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635341569] [2021-07-13 19:29:55,644 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1635341569] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:29:55,644 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [434917975] [2021-07-13 19:29:55,644 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:29:55,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:29:55,669 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 19:29:55,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:29:55,985 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:29:55,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:29:55,987 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:29:55,988 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 31 [2021-07-13 19:29:55,990 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:29:55,992 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:29:55,994 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:29:55,995 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 29 [2021-07-13 19:29:55,996 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:29:55,998 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:29:55,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:29:55,999 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 29 [2021-07-13 19:29:56,007 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:29:56,019 INFO L628 ElimStorePlain]: treesize reduction 72, result has 13.3 percent of original size [2021-07-13 19:29:56,019 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:29:56,020 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:29:56,020 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:149, output treesize:11 [2021-07-13 19:29:56,028 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:29:56,028 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [434917975] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:29:56,028 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:29:56,028 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 17 [2021-07-13 19:29:56,028 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031939213] [2021-07-13 19:29:56,028 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:29:56,028 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:29:56,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:29:56,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:29:56,028 INFO L87 Difference]: Start difference. First operand 320 states and 891 transitions. Second operand has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:29:56,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:29:56,511 INFO L93 Difference]: Finished difference Result 409 states and 1057 transitions. [2021-07-13 19:29:56,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 19:29:56,511 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-13 19:29:56,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:29:56,512 INFO L225 Difference]: With dead ends: 409 [2021-07-13 19:29:56,512 INFO L226 Difference]: Without dead ends: 397 [2021-07-13 19:29:56,512 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 664.2ms TimeCoverageRelationStatistics Valid=105, Invalid=495, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:29:56,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2021-07-13 19:29:56,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 340. [2021-07-13 19:29:56,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 340 states, 339 states have (on average 2.814159292035398) internal successors, (954), 339 states have internal predecessors, (954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:29:56,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 954 transitions. [2021-07-13 19:29:56,516 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 954 transitions. Word has length 16 [2021-07-13 19:29:56,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:29:56,516 INFO L482 AbstractCegarLoop]: Abstraction has 340 states and 954 transitions. [2021-07-13 19:29:56,516 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:29:56,516 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 954 transitions. [2021-07-13 19:29:56,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-13 19:29:56,517 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:29:56,517 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:29:56,718 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable972 [2021-07-13 19:29:56,718 INFO L430 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:29:56,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:29:56,718 INFO L82 PathProgramCache]: Analyzing trace with hash 1084614952, now seen corresponding path program 140 times [2021-07-13 19:29:56,718 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:29:56,718 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656190603] [2021-07-13 19:29:56,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:29:56,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:29:57,083 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:29:57,084 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:29:57,084 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656190603] [2021-07-13 19:29:57,084 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656190603] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:29:57,084 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2131513911] [2021-07-13 19:29:57,084 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:29:57,109 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:29:57,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:29:57,110 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 19:29:57,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:29:57,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:29:57,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:29:57,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:29:57,575 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:29:57,575 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 31 [2021-07-13 19:29:57,577 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:29:57,600 INFO L628 ElimStorePlain]: treesize reduction 121, result has 8.3 percent of original size [2021-07-13 19:29:57,600 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:29:57,600 INFO L518 ElimStorePlain]: Eliminatee v_prenex_78 vanished before elimination [2021-07-13 19:29:57,600 INFO L518 ElimStorePlain]: Eliminatee v_prenex_77 vanished before elimination [2021-07-13 19:29:57,600 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:29:57,601 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:161, output treesize:11 [2021-07-13 19:29:57,631 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:29:57,631 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2131513911] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:29:57,631 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:29:57,631 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2021-07-13 19:29:57,631 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750549513] [2021-07-13 19:29:57,631 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:29:57,631 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:29:57,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:29:57,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:29:57,632 INFO L87 Difference]: Start difference. First operand 340 states and 954 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:29:58,215 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 58 [2021-07-13 19:29:58,369 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 58 [2021-07-13 19:29:58,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:29:58,689 INFO L93 Difference]: Finished difference Result 396 states and 1057 transitions. [2021-07-13 19:29:58,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:29:58,690 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-13 19:29:58,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:29:58,692 INFO L225 Difference]: With dead ends: 396 [2021-07-13 19:29:58,692 INFO L226 Difference]: Without dead ends: 390 [2021-07-13 19:29:58,692 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 1452.5ms TimeCoverageRelationStatistics Valid=108, Invalid=704, Unknown=0, NotChecked=0, Total=812 [2021-07-13 19:29:58,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2021-07-13 19:29:58,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 348. [2021-07-13 19:29:58,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 348 states, 347 states have (on average 2.8184438040345823) internal successors, (978), 347 states have internal predecessors, (978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:29:58,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 978 transitions. [2021-07-13 19:29:58,696 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 978 transitions. Word has length 16 [2021-07-13 19:29:58,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:29:58,696 INFO L482 AbstractCegarLoop]: Abstraction has 348 states and 978 transitions. [2021-07-13 19:29:58,696 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:29:58,696 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 978 transitions. [2021-07-13 19:29:58,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-13 19:29:58,696 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:29:58,697 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:29:58,897 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable993 [2021-07-13 19:29:58,897 INFO L430 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:29:58,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:29:58,897 INFO L82 PathProgramCache]: Analyzing trace with hash -425796252, now seen corresponding path program 141 times [2021-07-13 19:29:58,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:29:58,897 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673305241] [2021-07-13 19:29:58,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:29:58,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:29:59,183 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:29:59,183 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:29:59,183 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673305241] [2021-07-13 19:29:59,183 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [673305241] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:29:59,183 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1055908742] [2021-07-13 19:29:59,183 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:29:59,212 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:29:59,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:29:59,213 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 19:29:59,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:29:59,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:29:59,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:29:59,643 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:29:59,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:29:59,645 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:29:59,646 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 33 [2021-07-13 19:29:59,647 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:29:59,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:29:59,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:29:59,651 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:29:59,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:29:59,652 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 35 [2021-07-13 19:29:59,655 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:29:59,666 INFO L628 ElimStorePlain]: treesize reduction 101, result has 9.8 percent of original size [2021-07-13 19:29:59,666 INFO L518 ElimStorePlain]: Eliminatee v_prenex_80 vanished before elimination [2021-07-13 19:29:59,667 INFO L518 ElimStorePlain]: Eliminatee array_0 vanished before elimination [2021-07-13 19:29:59,667 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:29:59,667 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:29:59,667 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 6 variables, input treesize:173, output treesize:11 [2021-07-13 19:29:59,696 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:29:59,696 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1055908742] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:29:59,696 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:29:59,696 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-07-13 19:29:59,696 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531482824] [2021-07-13 19:29:59,697 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:29:59,697 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:29:59,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:29:59,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:29:59,697 INFO L87 Difference]: Start difference. First operand 348 states and 978 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:30:00,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:30:00,505 INFO L93 Difference]: Finished difference Result 395 states and 1079 transitions. [2021-07-13 19:30:00,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 19:30:00,506 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-13 19:30:00,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:30:00,506 INFO L225 Difference]: With dead ends: 395 [2021-07-13 19:30:00,506 INFO L226 Difference]: Without dead ends: 392 [2021-07-13 19:30:00,506 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 1162.8ms TimeCoverageRelationStatistics Valid=93, Invalid=557, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:30:00,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 392 states. [2021-07-13 19:30:00,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 392 to 354. [2021-07-13 19:30:00,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 354 states, 353 states have (on average 2.8158640226628897) internal successors, (994), 353 states have internal predecessors, (994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:30:00,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 994 transitions. [2021-07-13 19:30:00,510 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 994 transitions. Word has length 16 [2021-07-13 19:30:00,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:30:00,510 INFO L482 AbstractCegarLoop]: Abstraction has 354 states and 994 transitions. [2021-07-13 19:30:00,511 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:30:00,511 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 994 transitions. [2021-07-13 19:30:00,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-13 19:30:00,511 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:30:00,511 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:30:00,727 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1009,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:30:00,727 INFO L430 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:30:00,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:30:00,727 INFO L82 PathProgramCache]: Analyzing trace with hash -3903320, now seen corresponding path program 142 times [2021-07-13 19:30:00,727 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:30:00,727 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133210077] [2021-07-13 19:30:00,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:30:00,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:30:00,855 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:30:00,855 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:30:00,855 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133210077] [2021-07-13 19:30:00,855 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [133210077] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:30:00,855 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1128502016] [2021-07-13 19:30:00,855 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:30:00,880 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:30:00,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:30:00,881 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 19:30:00,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:30:01,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:30:01,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:30:01,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:30:01,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:30:01,271 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:30:01,271 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 33 [2021-07-13 19:30:01,273 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:30:01,291 INFO L628 ElimStorePlain]: treesize reduction 129, result has 7.9 percent of original size [2021-07-13 19:30:01,291 INFO L518 ElimStorePlain]: Eliminatee v_prenex_86 vanished before elimination [2021-07-13 19:30:01,291 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:30:01,291 INFO L518 ElimStorePlain]: Eliminatee v_prenex_85 vanished before elimination [2021-07-13 19:30:01,292 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:30:01,292 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:173, output treesize:11 [2021-07-13 19:30:01,302 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:30:01,302 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1128502016] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:30:01,302 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:30:01,302 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-13 19:30:01,302 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547345293] [2021-07-13 19:30:01,302 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:30:01,303 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:30:01,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:30:01,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:30:01,303 INFO L87 Difference]: Start difference. First operand 354 states and 994 transitions. Second operand has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:30:01,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:30:01,841 INFO L93 Difference]: Finished difference Result 454 states and 1186 transitions. [2021-07-13 19:30:01,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:30:01,842 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-13 19:30:01,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:30:01,842 INFO L225 Difference]: With dead ends: 454 [2021-07-13 19:30:01,842 INFO L226 Difference]: Without dead ends: 451 [2021-07-13 19:30:01,843 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 642.3ms TimeCoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:30:01,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451 states. [2021-07-13 19:30:01,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451 to 379. [2021-07-13 19:30:01,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 379 states, 378 states have (on average 2.8439153439153437) internal successors, (1075), 378 states have internal predecessors, (1075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:30:01,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 379 states to 379 states and 1075 transitions. [2021-07-13 19:30:01,847 INFO L78 Accepts]: Start accepts. Automaton has 379 states and 1075 transitions. Word has length 16 [2021-07-13 19:30:01,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:30:01,847 INFO L482 AbstractCegarLoop]: Abstraction has 379 states and 1075 transitions. [2021-07-13 19:30:01,847 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:30:01,847 INFO L276 IsEmpty]: Start isEmpty. Operand 379 states and 1075 transitions. [2021-07-13 19:30:01,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-13 19:30:01,848 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:30:01,848 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:30:02,048 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1026 [2021-07-13 19:30:02,048 INFO L430 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:30:02,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:30:02,049 INFO L82 PathProgramCache]: Analyzing trace with hash 439009666, now seen corresponding path program 143 times [2021-07-13 19:30:02,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:30:02,049 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015573518] [2021-07-13 19:30:02,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:30:02,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:30:02,478 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:30:02,479 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:30:02,479 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015573518] [2021-07-13 19:30:02,479 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1015573518] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:30:02,479 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [891068593] [2021-07-13 19:30:02,479 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:30:02,507 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:30:02,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:30:02,508 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 19:30:02,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:30:03,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:30:03,031 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:30:03,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:30:03,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:30:03,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 33 [2021-07-13 19:30:03,034 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:30:03,061 INFO L628 ElimStorePlain]: treesize reduction 129, result has 7.9 percent of original size [2021-07-13 19:30:03,061 INFO L518 ElimStorePlain]: Eliminatee array_0 vanished before elimination [2021-07-13 19:30:03,062 INFO L518 ElimStorePlain]: Eliminatee v_prenex_91 vanished before elimination [2021-07-13 19:30:03,062 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:30:03,062 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:30:03,062 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:173, output treesize:11 [2021-07-13 19:30:03,088 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:30:03,088 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [891068593] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:30:03,088 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:30:03,088 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-07-13 19:30:03,088 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797450134] [2021-07-13 19:30:03,088 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:30:03,088 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:30:03,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:30:03,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:30:03,089 INFO L87 Difference]: Start difference. First operand 379 states and 1075 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:30:03,869 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 68 [2021-07-13 19:30:04,077 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 54 [2021-07-13 19:30:04,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:30:04,241 INFO L93 Difference]: Finished difference Result 574 states and 1593 transitions. [2021-07-13 19:30:04,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 19:30:04,241 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-13 19:30:04,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:30:04,242 INFO L225 Difference]: With dead ends: 574 [2021-07-13 19:30:04,242 INFO L226 Difference]: Without dead ends: 571 [2021-07-13 19:30:04,242 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 1557.6ms TimeCoverageRelationStatistics Valid=108, Invalid=704, Unknown=0, NotChecked=0, Total=812 [2021-07-13 19:30:04,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 571 states. [2021-07-13 19:30:04,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 571 to 384. [2021-07-13 19:30:04,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 384 states, 383 states have (on average 2.8407310704960835) internal successors, (1088), 383 states have internal predecessors, (1088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:30:04,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 1088 transitions. [2021-07-13 19:30:04,261 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 1088 transitions. Word has length 16 [2021-07-13 19:30:04,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:30:04,261 INFO L482 AbstractCegarLoop]: Abstraction has 384 states and 1088 transitions. [2021-07-13 19:30:04,261 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:30:04,261 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 1088 transitions. [2021-07-13 19:30:04,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-13 19:30:04,262 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:30:04,262 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:30:04,471 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1042,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:30:04,471 INFO L430 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:30:04,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:30:04,471 INFO L82 PathProgramCache]: Analyzing trace with hash -1213943708, now seen corresponding path program 144 times [2021-07-13 19:30:04,471 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:30:04,471 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481827100] [2021-07-13 19:30:04,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:30:04,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:30:04,911 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:30:04,911 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:30:04,911 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481827100] [2021-07-13 19:30:04,911 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1481827100] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:30:04,911 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [111358792] [2021-07-13 19:30:04,911 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:30:04,938 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:30:04,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:30:04,939 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 19:30:04,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:30:05,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:30:05,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:30:05,413 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:30:05,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:30:05,415 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:30:05,416 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 33 [2021-07-13 19:30:05,418 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:30:05,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:30:05,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:30:05,425 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:30:05,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:30:05,427 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 25 [2021-07-13 19:30:05,428 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:30:05,469 INFO L628 ElimStorePlain]: treesize reduction 80, result has 47.0 percent of original size [2021-07-13 19:30:05,469 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:30:05,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:30:05,472 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:30:05,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:30:05,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:30:05,473 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 35 [2021-07-13 19:30:05,475 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:30:05,486 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:30:05,488 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:30:05,488 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-13 19:30:05,489 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:30:05,499 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:30:05,500 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:30:05,500 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:213, output treesize:22 [2021-07-13 19:30:05,538 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:30:05,538 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [111358792] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:30:05,538 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:30:05,538 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2021-07-13 19:30:05,538 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632013264] [2021-07-13 19:30:05,538 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:30:05,538 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:30:05,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:30:05,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:30:05,539 INFO L87 Difference]: Start difference. First operand 384 states and 1088 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:30:06,073 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 66 [2021-07-13 19:30:06,411 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 78 [2021-07-13 19:30:06,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:30:06,544 INFO L93 Difference]: Finished difference Result 456 states and 1250 transitions. [2021-07-13 19:30:06,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:30:06,544 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-13 19:30:06,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:30:06,545 INFO L225 Difference]: With dead ends: 456 [2021-07-13 19:30:06,545 INFO L226 Difference]: Without dead ends: 450 [2021-07-13 19:30:06,545 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 1383.3ms TimeCoverageRelationStatistics Valid=73, Invalid=577, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:30:06,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2021-07-13 19:30:06,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 384. [2021-07-13 19:30:06,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 384 states, 383 states have (on average 2.8407310704960835) internal successors, (1088), 383 states have internal predecessors, (1088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:30:06,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 1088 transitions. [2021-07-13 19:30:06,550 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 1088 transitions. Word has length 16 [2021-07-13 19:30:06,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:30:06,550 INFO L482 AbstractCegarLoop]: Abstraction has 384 states and 1088 transitions. [2021-07-13 19:30:06,550 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:30:06,550 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 1088 transitions. [2021-07-13 19:30:06,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-13 19:30:06,550 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:30:06,551 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:30:06,751 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 149 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1058 [2021-07-13 19:30:06,751 INFO L430 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:30:06,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:30:06,751 INFO L82 PathProgramCache]: Analyzing trace with hash 1920001474, now seen corresponding path program 145 times [2021-07-13 19:30:06,752 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:30:06,752 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129571555] [2021-07-13 19:30:06,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:30:06,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:30:07,082 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:30:07,083 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:30:07,083 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129571555] [2021-07-13 19:30:07,083 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [129571555] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:30:07,083 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2061933398] [2021-07-13 19:30:07,083 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:30:07,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:30:07,198 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 19:30:07,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:30:07,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:30:07,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:30:07,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:30:07,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:30:07,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:30:07,701 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:30:07,705 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:30:07,706 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 33 [2021-07-13 19:30:07,707 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:30:07,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:30:07,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:30:07,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:30:07,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:30:07,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:30:07,713 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:30:07,714 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 35 [2021-07-13 19:30:07,715 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:30:07,727 INFO L628 ElimStorePlain]: treesize reduction 105, result has 9.5 percent of original size [2021-07-13 19:30:07,727 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:30:07,727 INFO L518 ElimStorePlain]: Eliminatee v_prenex_105 vanished before elimination [2021-07-13 19:30:07,727 INFO L518 ElimStorePlain]: Eliminatee v_prenex_106 vanished before elimination [2021-07-13 19:30:07,727 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:30:07,728 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 6 variables, input treesize:173, output treesize:11 [2021-07-13 19:30:07,752 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:30:07,752 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2061933398] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:30:07,752 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:30:07,752 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-07-13 19:30:07,752 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22744352] [2021-07-13 19:30:07,753 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:30:07,753 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:30:07,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:30:07,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:30:07,753 INFO L87 Difference]: Start difference. First operand 384 states and 1088 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:30:08,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:30:08,786 INFO L93 Difference]: Finished difference Result 466 states and 1272 transitions. [2021-07-13 19:30:08,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 19:30:08,787 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-13 19:30:08,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:30:08,788 INFO L225 Difference]: With dead ends: 466 [2021-07-13 19:30:08,788 INFO L226 Difference]: Without dead ends: 457 [2021-07-13 19:30:08,788 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 1324.0ms TimeCoverageRelationStatistics Valid=108, Invalid=704, Unknown=0, NotChecked=0, Total=812 [2021-07-13 19:30:08,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 457 states. [2021-07-13 19:30:08,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 457 to 389. [2021-07-13 19:30:08,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 389 states, 388 states have (on average 2.8376288659793816) internal successors, (1101), 388 states have internal predecessors, (1101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:30:08,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 389 states to 389 states and 1101 transitions. [2021-07-13 19:30:08,793 INFO L78 Accepts]: Start accepts. Automaton has 389 states and 1101 transitions. Word has length 16 [2021-07-13 19:30:08,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:30:08,793 INFO L482 AbstractCegarLoop]: Abstraction has 389 states and 1101 transitions. [2021-07-13 19:30:08,793 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:30:08,793 INFO L276 IsEmpty]: Start isEmpty. Operand 389 states and 1101 transitions. [2021-07-13 19:30:08,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-13 19:30:08,793 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:30:08,793 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:30:09,008 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1073 [2021-07-13 19:30:09,009 INFO L430 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:30:09,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:30:09,009 INFO L82 PathProgramCache]: Analyzing trace with hash -2135323484, now seen corresponding path program 146 times [2021-07-13 19:30:09,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:30:09,009 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047851221] [2021-07-13 19:30:09,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:30:09,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:30:09,265 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:30:09,265 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:30:09,265 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047851221] [2021-07-13 19:30:09,265 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2047851221] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:30:09,265 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1168389114] [2021-07-13 19:30:09,265 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:30:09,291 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:30:09,292 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:30:09,292 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 19:30:09,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:30:09,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:30:09,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:30:09,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:30:09,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:30:09,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:30:09,823 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:30:09,823 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 33 [2021-07-13 19:30:09,824 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:30:09,841 INFO L628 ElimStorePlain]: treesize reduction 133, result has 7.6 percent of original size [2021-07-13 19:30:09,841 INFO L518 ElimStorePlain]: Eliminatee v_prenex_109 vanished before elimination [2021-07-13 19:30:09,841 INFO L518 ElimStorePlain]: Eliminatee array_0 vanished before elimination [2021-07-13 19:30:09,841 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:30:09,842 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:30:09,842 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:173, output treesize:11 [2021-07-13 19:30:09,865 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:30:09,865 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1168389114] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:30:09,865 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:30:09,866 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-07-13 19:30:09,866 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118663594] [2021-07-13 19:30:09,866 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:30:09,866 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:30:09,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:30:09,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:30:09,866 INFO L87 Difference]: Start difference. First operand 389 states and 1101 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:30:10,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:30:10,783 INFO L93 Difference]: Finished difference Result 505 states and 1344 transitions. [2021-07-13 19:30:10,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 19:30:10,783 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-13 19:30:10,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:30:10,784 INFO L225 Difference]: With dead ends: 505 [2021-07-13 19:30:10,784 INFO L226 Difference]: Without dead ends: 501 [2021-07-13 19:30:10,784 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 1316.0ms TimeCoverageRelationStatistics Valid=120, Invalid=636, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:30:10,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 501 states. [2021-07-13 19:30:10,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 501 to 403. [2021-07-13 19:30:10,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 403 states, 402 states have (on average 2.853233830845771) internal successors, (1147), 402 states have internal predecessors, (1147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:30:10,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 1147 transitions. [2021-07-13 19:30:10,789 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 1147 transitions. Word has length 16 [2021-07-13 19:30:10,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:30:10,789 INFO L482 AbstractCegarLoop]: Abstraction has 403 states and 1147 transitions. [2021-07-13 19:30:10,789 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:30:10,789 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 1147 transitions. [2021-07-13 19:30:10,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-13 19:30:10,790 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:30:10,790 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:30:10,990 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 151 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1088 [2021-07-13 19:30:10,991 INFO L430 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:30:10,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:30:10,991 INFO L82 PathProgramCache]: Analyzing trace with hash -2127593086, now seen corresponding path program 147 times [2021-07-13 19:30:10,991 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:30:10,991 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831502470] [2021-07-13 19:30:10,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:30:10,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:30:11,251 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:30:11,251 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:30:11,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831502470] [2021-07-13 19:30:11,251 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [831502470] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:30:11,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [891229216] [2021-07-13 19:30:11,251 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:30:11,278 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 19:30:11,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:30:11,279 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 45 conjunts are in the unsatisfiable core [2021-07-13 19:30:11,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:30:11,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:30:11,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:30:11,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:30:11,651 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:30:11,654 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:30:11,655 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 39 [2021-07-13 19:30:11,656 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:30:11,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:30:11,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:30:11,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:30:11,661 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:30:11,663 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:30:11,664 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 31 [2021-07-13 19:30:11,665 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:30:11,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:30:11,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:30:11,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:30:11,670 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:30:11,673 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:30:11,674 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 23 [2021-07-13 19:30:11,675 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:30:11,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:30:11,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:30:11,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:30:11,680 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:30:11,680 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 31 [2021-07-13 19:30:11,682 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:30:11,736 INFO L628 ElimStorePlain]: treesize reduction 95, result has 39.9 percent of original size [2021-07-13 19:30:11,739 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:30:11,739 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-13 19:30:11,740 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-13 19:30:11,761 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:30:11,761 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:30:11,762 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 2 variables, input treesize:265, output treesize:58 [2021-07-13 19:30:11,843 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:30:11,843 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [891229216] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:30:11,843 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:30:11,843 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-13 19:30:11,844 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475036881] [2021-07-13 19:30:11,844 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:30:11,844 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:30:11,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:30:11,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:30:11,844 INFO L87 Difference]: Start difference. First operand 403 states and 1147 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:30:12,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:30:12,797 INFO L93 Difference]: Finished difference Result 553 states and 1482 transitions. [2021-07-13 19:30:12,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 19:30:12,797 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-13 19:30:12,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:30:12,798 INFO L225 Difference]: With dead ends: 553 [2021-07-13 19:30:12,798 INFO L226 Difference]: Without dead ends: 546 [2021-07-13 19:30:12,798 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 1216.9ms TimeCoverageRelationStatistics Valid=130, Invalid=740, Unknown=0, NotChecked=0, Total=870 [2021-07-13 19:30:12,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 546 states. [2021-07-13 19:30:12,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 546 to 427. [2021-07-13 19:30:12,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 427 states, 426 states have (on average 2.887323943661972) internal successors, (1230), 426 states have internal predecessors, (1230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:30:12,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 427 states to 427 states and 1230 transitions. [2021-07-13 19:30:12,804 INFO L78 Accepts]: Start accepts. Automaton has 427 states and 1230 transitions. Word has length 16 [2021-07-13 19:30:12,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:30:12,804 INFO L482 AbstractCegarLoop]: Abstraction has 427 states and 1230 transitions. [2021-07-13 19:30:12,804 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:30:12,804 INFO L276 IsEmpty]: Start isEmpty. Operand 427 states and 1230 transitions. [2021-07-13 19:30:12,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-13 19:30:12,805 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:30:12,805 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:30:13,008 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1107 [2021-07-13 19:30:13,009 INFO L430 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:30:13,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:30:13,009 INFO L82 PathProgramCache]: Analyzing trace with hash -328145428, now seen corresponding path program 148 times [2021-07-13 19:30:13,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:30:13,009 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452558378] [2021-07-13 19:30:13,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:30:13,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:30:13,388 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:30:13,389 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:30:13,389 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452558378] [2021-07-13 19:30:13,389 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1452558378] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:30:13,389 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1753435509] [2021-07-13 19:30:13,389 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:30:13,415 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:30:13,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:30:13,416 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 19:30:13,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:30:13,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:30:13,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:30:13,922 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:30:13,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:30:13,924 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:30:13,925 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 33 [2021-07-13 19:30:13,927 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:30:13,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:30:13,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:30:13,931 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:30:13,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:30:13,932 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 35 [2021-07-13 19:30:13,933 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:30:13,971 INFO L628 ElimStorePlain]: treesize reduction 84, result has 46.2 percent of original size [2021-07-13 19:30:13,973 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:30:13,974 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-13 19:30:13,974 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:30:13,988 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:30:13,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:30:13,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:30:13,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:30:13,992 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 20 [2021-07-13 19:30:13,993 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:30:14,003 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:30:14,003 INFO L518 ElimStorePlain]: Eliminatee v_prenex_116 vanished before elimination [2021-07-13 19:30:14,004 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:30:14,004 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:213, output treesize:22 [2021-07-13 19:30:14,040 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:30:14,040 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1753435509] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:30:14,040 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:30:14,040 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2021-07-13 19:30:14,041 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432299672] [2021-07-13 19:30:14,041 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:30:14,041 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:30:14,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:30:14,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:30:14,041 INFO L87 Difference]: Start difference. First operand 427 states and 1230 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:30:15,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:30:15,182 INFO L93 Difference]: Finished difference Result 468 states and 1314 transitions. [2021-07-13 19:30:15,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 19:30:15,182 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-13 19:30:15,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:30:15,183 INFO L225 Difference]: With dead ends: 468 [2021-07-13 19:30:15,183 INFO L226 Difference]: Without dead ends: 465 [2021-07-13 19:30:15,184 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 1452.2ms TimeCoverageRelationStatistics Valid=85, Invalid=671, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:30:15,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 465 states. [2021-07-13 19:30:15,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 465 to 427. [2021-07-13 19:30:15,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 427 states, 426 states have (on average 2.887323943661972) internal successors, (1230), 426 states have internal predecessors, (1230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:30:15,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 427 states to 427 states and 1230 transitions. [2021-07-13 19:30:15,209 INFO L78 Accepts]: Start accepts. Automaton has 427 states and 1230 transitions. Word has length 16 [2021-07-13 19:30:15,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:30:15,209 INFO L482 AbstractCegarLoop]: Abstraction has 427 states and 1230 transitions. [2021-07-13 19:30:15,209 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:30:15,209 INFO L276 IsEmpty]: Start isEmpty. Operand 427 states and 1230 transitions. [2021-07-13 19:30:15,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-13 19:30:15,210 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:30:15,210 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:30:15,410 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1117,153 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:30:15,410 INFO L430 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:30:15,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:30:15,410 INFO L82 PathProgramCache]: Analyzing trace with hash -1249525204, now seen corresponding path program 149 times [2021-07-13 19:30:15,411 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:30:15,411 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425717735] [2021-07-13 19:30:15,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:30:15,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:30:15,812 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 42 [2021-07-13 19:30:15,968 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:30:15,968 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:30:15,969 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425717735] [2021-07-13 19:30:15,969 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1425717735] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:30:15,969 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [617295010] [2021-07-13 19:30:15,969 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:30:15,996 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:30:15,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:30:15,996 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 19:30:15,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:30:16,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:30:16,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:30:16,549 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:30:16,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:30:16,550 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 33 [2021-07-13 19:30:16,552 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:30:16,578 INFO L628 ElimStorePlain]: treesize reduction 133, result has 7.6 percent of original size [2021-07-13 19:30:16,578 INFO L518 ElimStorePlain]: Eliminatee v_prenex_119 vanished before elimination [2021-07-13 19:30:16,578 INFO L518 ElimStorePlain]: Eliminatee array_0 vanished before elimination [2021-07-13 19:30:16,578 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:30:16,579 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:30:16,579 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:173, output treesize:11 [2021-07-13 19:30:16,606 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:30:16,606 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [617295010] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:30:16,606 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:30:16,606 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2021-07-13 19:30:16,606 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751846905] [2021-07-13 19:30:16,606 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:30:16,606 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:30:16,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:30:16,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:30:16,607 INFO L87 Difference]: Start difference. First operand 427 states and 1230 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:30:17,313 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-07-13 19:30:17,629 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2021-07-13 19:30:17,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:30:17,887 INFO L93 Difference]: Finished difference Result 507 states and 1380 transitions. [2021-07-13 19:30:17,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 19:30:17,888 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-13 19:30:17,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:30:17,889 INFO L225 Difference]: With dead ends: 507 [2021-07-13 19:30:17,889 INFO L226 Difference]: Without dead ends: 501 [2021-07-13 19:30:17,889 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 1848.1ms TimeCoverageRelationStatistics Valid=129, Invalid=741, Unknown=0, NotChecked=0, Total=870 [2021-07-13 19:30:17,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 501 states. [2021-07-13 19:30:17,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 501 to 428. [2021-07-13 19:30:17,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 428 states, 427 states have (on average 2.88056206088993) internal successors, (1230), 427 states have internal predecessors, (1230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:30:17,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 428 states to 428 states and 1230 transitions. [2021-07-13 19:30:17,894 INFO L78 Accepts]: Start accepts. Automaton has 428 states and 1230 transitions. Word has length 16 [2021-07-13 19:30:17,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:30:17,894 INFO L482 AbstractCegarLoop]: Abstraction has 428 states and 1230 transitions. [2021-07-13 19:30:17,894 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:30:17,894 INFO L276 IsEmpty]: Start isEmpty. Operand 428 states and 1230 transitions. [2021-07-13 19:30:17,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-13 19:30:17,895 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:30:17,895 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:30:18,095 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1135,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:30:18,095 INFO L430 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:30:18,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:30:18,096 INFO L82 PathProgramCache]: Analyzing trace with hash -1241794806, now seen corresponding path program 150 times [2021-07-13 19:30:18,096 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:30:18,096 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433860134] [2021-07-13 19:30:18,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:30:18,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:30:18,281 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:30:18,282 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:30:18,282 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433860134] [2021-07-13 19:30:18,282 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [433860134] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:30:18,282 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [172896636] [2021-07-13 19:30:18,282 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:30:18,311 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:30:18,311 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:30:18,312 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 19:30:18,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:30:18,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:30:18,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:30:18,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:30:18,768 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:30:18,770 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:30:18,771 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 33 [2021-07-13 19:30:18,772 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:30:18,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:30:18,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:30:18,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:30:18,777 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:30:18,779 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:30:18,780 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 31 [2021-07-13 19:30:18,781 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:30:18,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:30:18,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:30:18,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:30:18,786 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:30:18,786 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 31 [2021-07-13 19:30:18,791 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:30:18,803 INFO L628 ElimStorePlain]: treesize reduction 66, result has 14.3 percent of original size [2021-07-13 19:30:18,804 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:30:18,804 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:30:18,804 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:161, output treesize:11 [2021-07-13 19:30:18,828 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:30:18,829 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [172896636] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:30:18,829 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:30:18,829 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-13 19:30:18,829 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323403658] [2021-07-13 19:30:18,829 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:30:18,829 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:30:18,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:30:18,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:30:18,829 INFO L87 Difference]: Start difference. First operand 428 states and 1230 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:30:19,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:30:19,392 INFO L93 Difference]: Finished difference Result 545 states and 1456 transitions. [2021-07-13 19:30:19,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:30:19,392 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-13 19:30:19,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:30:19,393 INFO L225 Difference]: With dead ends: 545 [2021-07-13 19:30:19,393 INFO L226 Difference]: Without dead ends: 541 [2021-07-13 19:30:19,393 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 808.0ms TimeCoverageRelationStatistics Valid=83, Invalid=469, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:30:19,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 541 states. [2021-07-13 19:30:19,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 541 to 426. [2021-07-13 19:30:19,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 426 states, 425 states have (on average 2.8823529411764706) internal successors, (1225), 425 states have internal predecessors, (1225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:30:19,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 426 states to 426 states and 1225 transitions. [2021-07-13 19:30:19,399 INFO L78 Accepts]: Start accepts. Automaton has 426 states and 1225 transitions. Word has length 16 [2021-07-13 19:30:19,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:30:19,399 INFO L482 AbstractCegarLoop]: Abstraction has 426 states and 1225 transitions. [2021-07-13 19:30:19,399 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:30:19,399 INFO L276 IsEmpty]: Start isEmpty. Operand 426 states and 1225 transitions. [2021-07-13 19:30:19,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-13 19:30:19,399 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:30:19,399 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:30:19,600 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1153,155 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:30:19,600 INFO L430 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:30:19,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:30:19,601 INFO L82 PathProgramCache]: Analyzing trace with hash 1711708166, now seen corresponding path program 151 times [2021-07-13 19:30:19,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:30:19,601 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813828607] [2021-07-13 19:30:19,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:30:19,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:30:19,816 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:30:19,817 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:30:19,817 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813828607] [2021-07-13 19:30:19,817 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1813828607] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:30:19,817 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1958032752] [2021-07-13 19:30:19,817 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:30:19,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:30:19,843 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 19:30:19,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:30:20,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:30:20,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:30:20,337 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:30:20,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:30:20,339 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:30:20,340 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 35 [2021-07-13 19:30:20,342 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:30:20,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:30:20,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:30:20,346 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:30:20,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:30:20,346 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 33 [2021-07-13 19:30:20,348 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:30:20,359 INFO L628 ElimStorePlain]: treesize reduction 99, result has 10.0 percent of original size [2021-07-13 19:30:20,359 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:30:20,359 INFO L518 ElimStorePlain]: Eliminatee v_prenex_123 vanished before elimination [2021-07-13 19:30:20,359 INFO L518 ElimStorePlain]: Eliminatee v_prenex_124 vanished before elimination [2021-07-13 19:30:20,360 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:30:20,360 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 6 variables, input treesize:173, output treesize:11 [2021-07-13 19:30:20,369 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:30:20,369 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1958032752] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:30:20,369 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:30:20,369 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 17 [2021-07-13 19:30:20,369 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526107095] [2021-07-13 19:30:20,370 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:30:20,370 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:30:20,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:30:20,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:30:20,370 INFO L87 Difference]: Start difference. First operand 426 states and 1225 transitions. Second operand has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:30:20,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:30:20,952 INFO L93 Difference]: Finished difference Result 489 states and 1343 transitions. [2021-07-13 19:30:20,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:30:20,953 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-13 19:30:20,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:30:20,953 INFO L225 Difference]: With dead ends: 489 [2021-07-13 19:30:20,953 INFO L226 Difference]: Without dead ends: 481 [2021-07-13 19:30:20,954 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 927.8ms TimeCoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:30:20,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 481 states. [2021-07-13 19:30:20,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 481 to 429. [2021-07-13 19:30:20,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 429 states, 428 states have (on average 2.8621495327102804) internal successors, (1225), 428 states have internal predecessors, (1225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:30:20,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 429 states to 429 states and 1225 transitions. [2021-07-13 19:30:20,959 INFO L78 Accepts]: Start accepts. Automaton has 429 states and 1225 transitions. Word has length 16 [2021-07-13 19:30:20,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:30:20,959 INFO L482 AbstractCegarLoop]: Abstraction has 429 states and 1225 transitions. [2021-07-13 19:30:20,959 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:30:20,959 INFO L276 IsEmpty]: Start isEmpty. Operand 429 states and 1225 transitions. [2021-07-13 19:30:20,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-13 19:30:20,960 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:30:20,960 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:30:21,160 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1175,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:30:21,160 INFO L430 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:30:21,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:30:21,161 INFO L82 PathProgramCache]: Analyzing trace with hash -1270531412, now seen corresponding path program 152 times [2021-07-13 19:30:21,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:30:21,161 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572322688] [2021-07-13 19:30:21,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:30:21,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:30:21,371 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:30:21,371 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:30:21,371 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572322688] [2021-07-13 19:30:21,371 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [572322688] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:30:21,371 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [737790832] [2021-07-13 19:30:21,371 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:30:21,397 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:30:21,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:30:21,398 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 19:30:21,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:30:22,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:30:22,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:30:22,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:30:22,012 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:30:22,014 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:30:22,015 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 31 [2021-07-13 19:30:22,017 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:30:22,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:30:22,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:30:22,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:30:22,022 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:30:22,022 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 33 [2021-07-13 19:30:22,023 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:30:22,036 INFO L628 ElimStorePlain]: treesize reduction 91, result has 10.8 percent of original size [2021-07-13 19:30:22,036 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:30:22,036 INFO L518 ElimStorePlain]: Eliminatee v_prenex_126 vanished before elimination [2021-07-13 19:30:22,036 INFO L518 ElimStorePlain]: Eliminatee v_prenex_127 vanished before elimination [2021-07-13 19:30:22,037 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:30:22,037 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 6 variables, input treesize:161, output treesize:11 [2021-07-13 19:30:22,059 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:30:22,059 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [737790832] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:30:22,059 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:30:22,059 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-13 19:30:22,059 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273645416] [2021-07-13 19:30:22,059 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:30:22,059 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:30:22,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:30:22,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:30:22,060 INFO L87 Difference]: Start difference. First operand 429 states and 1225 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:30:22,692 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 51 [2021-07-13 19:30:22,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:30:22,769 INFO L93 Difference]: Finished difference Result 495 states and 1336 transitions. [2021-07-13 19:30:22,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 19:30:22,770 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-13 19:30:22,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:30:22,770 INFO L225 Difference]: With dead ends: 495 [2021-07-13 19:30:22,770 INFO L226 Difference]: Without dead ends: 489 [2021-07-13 19:30:22,770 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 1185.5ms TimeCoverageRelationStatistics Valid=112, Invalid=590, Unknown=0, NotChecked=0, Total=702 [2021-07-13 19:30:22,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 489 states. [2021-07-13 19:30:22,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 489 to 428. [2021-07-13 19:30:22,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 428 states, 427 states have (on average 2.857142857142857) internal successors, (1220), 427 states have internal predecessors, (1220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:30:22,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 428 states to 428 states and 1220 transitions. [2021-07-13 19:30:22,775 INFO L78 Accepts]: Start accepts. Automaton has 428 states and 1220 transitions. Word has length 16 [2021-07-13 19:30:22,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:30:22,776 INFO L482 AbstractCegarLoop]: Abstraction has 428 states and 1220 transitions. [2021-07-13 19:30:22,776 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:30:22,776 INFO L276 IsEmpty]: Start isEmpty. Operand 428 states and 1220 transitions. [2021-07-13 19:30:22,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-13 19:30:22,776 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:30:22,776 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:30:22,977 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1191,157 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:30:22,977 INFO L430 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:30:22,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:30:22,977 INFO L82 PathProgramCache]: Analyzing trace with hash 1542761286, now seen corresponding path program 153 times [2021-07-13 19:30:22,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:30:22,977 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264368338] [2021-07-13 19:30:22,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:30:22,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:30:23,479 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:30:23,479 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:30:23,479 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264368338] [2021-07-13 19:30:23,479 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264368338] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:30:23,479 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1116574203] [2021-07-13 19:30:23,479 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:30:23,506 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:30:23,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:30:23,507 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 19:30:23,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:30:24,009 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:30:24,010 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:30:24,012 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-07-13 19:30:24,013 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:30:24,016 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:30:24,016 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:30:24,018 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 29 [2021-07-13 19:30:24,020 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:30:24,022 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:30:24,023 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:30:24,025 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 31 [2021-07-13 19:30:24,026 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:30:24,029 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:30:24,029 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 29 [2021-07-13 19:30:24,030 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:30:24,057 INFO L628 ElimStorePlain]: treesize reduction 51, result has 50.0 percent of original size [2021-07-13 19:30:24,059 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:30:24,059 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-13 19:30:24,060 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:30:24,070 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:30:24,071 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:30:24,071 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 5 variables, input treesize:189, output treesize:22 [2021-07-13 19:30:24,106 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:30:24,106 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1116574203] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:30:24,106 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:30:24,106 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2021-07-13 19:30:24,106 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867717763] [2021-07-13 19:30:24,106 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:30:24,106 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:30:24,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:30:24,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=300, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:30:24,107 INFO L87 Difference]: Start difference. First operand 428 states and 1220 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:30:24,551 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 58 [2021-07-13 19:30:25,039 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 64 [2021-07-13 19:30:26,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:30:26,017 INFO L93 Difference]: Finished difference Result 492 states and 1349 transitions. [2021-07-13 19:30:26,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 19:30:26,017 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-13 19:30:26,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:30:26,018 INFO L225 Difference]: With dead ends: 492 [2021-07-13 19:30:26,018 INFO L226 Difference]: Without dead ends: 486 [2021-07-13 19:30:26,018 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 2426.7ms TimeCoverageRelationStatistics Valid=162, Invalid=1098, Unknown=0, NotChecked=0, Total=1260 [2021-07-13 19:30:26,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 486 states. [2021-07-13 19:30:26,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 486 to 432. [2021-07-13 19:30:26,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 432 states, 431 states have (on average 2.8538283062645013) internal successors, (1230), 431 states have internal predecessors, (1230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:30:26,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 432 states to 432 states and 1230 transitions. [2021-07-13 19:30:26,023 INFO L78 Accepts]: Start accepts. Automaton has 432 states and 1230 transitions. Word has length 16 [2021-07-13 19:30:26,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:30:26,023 INFO L482 AbstractCegarLoop]: Abstraction has 432 states and 1230 transitions. [2021-07-13 19:30:26,024 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:30:26,024 INFO L276 IsEmpty]: Start isEmpty. Operand 432 states and 1230 transitions. [2021-07-13 19:30:26,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-13 19:30:26,024 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:30:26,024 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:30:26,226 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 158 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1210 [2021-07-13 19:30:26,226 INFO L430 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:30:26,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:30:26,226 INFO L82 PathProgramCache]: Analyzing trace with hash 1361797476, now seen corresponding path program 154 times [2021-07-13 19:30:26,226 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:30:26,227 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398531280] [2021-07-13 19:30:26,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:30:26,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:30:26,581 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:30:26,581 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:30:26,581 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398531280] [2021-07-13 19:30:26,581 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [398531280] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:30:26,581 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1376472312] [2021-07-13 19:30:26,581 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:30:26,607 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:30:26,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:30:26,608 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 19:30:26,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:30:27,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:30:27,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:30:27,052 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:30:27,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:30:27,054 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:30:27,055 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 33 [2021-07-13 19:30:27,056 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:30:27,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:30:27,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:30:27,060 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:30:27,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:30:27,061 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 25 [2021-07-13 19:30:27,062 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:30:27,102 INFO L628 ElimStorePlain]: treesize reduction 84, result has 45.8 percent of original size [2021-07-13 19:30:27,102 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:30:27,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:30:27,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:30:27,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:30:27,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:30:27,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:30:27,107 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:30:27,107 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 35 [2021-07-13 19:30:27,109 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:30:27,118 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:30:27,120 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:30:27,120 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-13 19:30:27,122 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-13 19:30:27,131 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:30:27,132 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:30:27,132 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:213, output treesize:22 [2021-07-13 19:30:27,166 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:30:27,167 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1376472312] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:30:27,167 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:30:27,167 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2021-07-13 19:30:27,167 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674785083] [2021-07-13 19:30:27,167 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:30:27,167 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:30:27,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:30:27,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:30:27,167 INFO L87 Difference]: Start difference. First operand 432 states and 1230 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:30:28,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:30:28,120 INFO L93 Difference]: Finished difference Result 460 states and 1282 transitions. [2021-07-13 19:30:28,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:30:28,121 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-13 19:30:28,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:30:28,121 INFO L225 Difference]: With dead ends: 460 [2021-07-13 19:30:28,121 INFO L226 Difference]: Without dead ends: 457 [2021-07-13 19:30:28,122 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 1291.3ms TimeCoverageRelationStatistics Valid=83, Invalid=619, Unknown=0, NotChecked=0, Total=702 [2021-07-13 19:30:28,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 457 states. [2021-07-13 19:30:28,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 457 to 433. [2021-07-13 19:30:28,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 433 states, 432 states have (on average 2.8541666666666665) internal successors, (1233), 432 states have internal predecessors, (1233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:30:28,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 433 states to 433 states and 1233 transitions. [2021-07-13 19:30:28,127 INFO L78 Accepts]: Start accepts. Automaton has 433 states and 1233 transitions. Word has length 16 [2021-07-13 19:30:28,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:30:28,127 INFO L482 AbstractCegarLoop]: Abstraction has 433 states and 1233 transitions. [2021-07-13 19:30:28,127 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:30:28,127 INFO L276 IsEmpty]: Start isEmpty. Operand 433 states and 1233 transitions. [2021-07-13 19:30:28,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-13 19:30:28,127 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:30:28,128 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:30:28,340 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1230,159 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:30:28,341 INFO L430 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:30:28,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:30:28,341 INFO L82 PathProgramCache]: Analyzing trace with hash 200775362, now seen corresponding path program 155 times [2021-07-13 19:30:28,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:30:28,341 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282046245] [2021-07-13 19:30:28,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:30:28,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:30:28,537 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:30:28,537 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:30:28,537 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282046245] [2021-07-13 19:30:28,538 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1282046245] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:30:28,538 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [144268957] [2021-07-13 19:30:28,538 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:30:28,565 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:30:28,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:30:28,566 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 19:30:28,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:30:28,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:30:28,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:30:28,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:30:28,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:30:28,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:30:28,966 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:30:28,966 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 33 [2021-07-13 19:30:28,968 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:30:28,984 INFO L628 ElimStorePlain]: treesize reduction 133, result has 7.6 percent of original size [2021-07-13 19:30:28,984 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:30:28,984 INFO L518 ElimStorePlain]: Eliminatee v_prenex_137 vanished before elimination [2021-07-13 19:30:28,984 INFO L518 ElimStorePlain]: Eliminatee v_prenex_138 vanished before elimination [2021-07-13 19:30:28,985 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:30:28,985 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:173, output treesize:11 [2021-07-13 19:30:28,994 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:30:28,994 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [144268957] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:30:28,994 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:30:28,994 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 17 [2021-07-13 19:30:28,994 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324888823] [2021-07-13 19:30:28,994 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:30:28,995 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:30:28,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:30:28,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:30:28,995 INFO L87 Difference]: Start difference. First operand 433 states and 1233 transitions. Second operand has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:30:29,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:30:29,460 INFO L93 Difference]: Finished difference Result 531 states and 1427 transitions. [2021-07-13 19:30:29,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 19:30:29,460 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-13 19:30:29,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:30:29,461 INFO L225 Difference]: With dead ends: 531 [2021-07-13 19:30:29,461 INFO L226 Difference]: Without dead ends: 520 [2021-07-13 19:30:29,462 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 715.7ms TimeCoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:30:29,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 520 states. [2021-07-13 19:30:29,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 520 to 424. [2021-07-13 19:30:29,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 424 states, 423 states have (on average 2.8747044917257685) internal successors, (1216), 423 states have internal predecessors, (1216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:30:29,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 424 states to 424 states and 1216 transitions. [2021-07-13 19:30:29,467 INFO L78 Accepts]: Start accepts. Automaton has 424 states and 1216 transitions. Word has length 16 [2021-07-13 19:30:29,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:30:29,467 INFO L482 AbstractCegarLoop]: Abstraction has 424 states and 1216 transitions. [2021-07-13 19:30:29,467 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:30:29,467 INFO L276 IsEmpty]: Start isEmpty. Operand 424 states and 1216 transitions. [2021-07-13 19:30:29,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-13 19:30:29,468 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:30:29,468 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:30:29,668 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1251,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:30:29,668 INFO L430 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:30:29,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:30:29,669 INFO L82 PathProgramCache]: Analyzing trace with hash -1062263106, now seen corresponding path program 156 times [2021-07-13 19:30:29,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:30:29,669 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301201217] [2021-07-13 19:30:29,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:30:29,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:30:29,962 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:30:29,962 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:30:29,962 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301201217] [2021-07-13 19:30:29,962 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1301201217] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:30:29,962 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1756966524] [2021-07-13 19:30:29,962 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:30:29,988 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:30:29,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:30:29,989 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 19:30:30,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:30:30,201 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 43 [2021-07-13 19:30:30,478 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:30:30,478 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:30:30,480 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 29 [2021-07-13 19:30:30,482 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:30:30,484 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:30:30,485 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:30:30,487 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 37 [2021-07-13 19:30:30,488 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:30:30,491 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:30:30,491 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:30:30,493 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 29 [2021-07-13 19:30:30,495 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:30:30,497 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:30:30,498 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-07-13 19:30:30,499 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:30:30,515 INFO L628 ElimStorePlain]: treesize reduction 83, result has 15.3 percent of original size [2021-07-13 19:30:30,515 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:30:30,516 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:30:30,516 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:189, output treesize:11 [2021-07-13 19:30:30,543 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:30:30,543 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1756966524] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:30:30,544 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:30:30,544 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-07-13 19:30:30,544 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077260418] [2021-07-13 19:30:30,544 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:30:30,544 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:30:30,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:30:30,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:30:30,544 INFO L87 Difference]: Start difference. First operand 424 states and 1216 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:30:31,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:30:31,480 INFO L93 Difference]: Finished difference Result 466 states and 1300 transitions. [2021-07-13 19:30:31,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 19:30:31,480 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-13 19:30:31,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:30:31,481 INFO L225 Difference]: With dead ends: 466 [2021-07-13 19:30:31,481 INFO L226 Difference]: Without dead ends: 463 [2021-07-13 19:30:31,481 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 1323.3ms TimeCoverageRelationStatistics Valid=102, Invalid=654, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:30:31,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 463 states. [2021-07-13 19:30:31,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 463 to 423. [2021-07-13 19:30:31,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 423 states, 422 states have (on average 2.876777251184834) internal successors, (1214), 422 states have internal predecessors, (1214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:30:31,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 423 states to 423 states and 1214 transitions. [2021-07-13 19:30:31,486 INFO L78 Accepts]: Start accepts. Automaton has 423 states and 1214 transitions. Word has length 16 [2021-07-13 19:30:31,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:30:31,486 INFO L482 AbstractCegarLoop]: Abstraction has 423 states and 1214 transitions. [2021-07-13 19:30:31,486 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:30:31,486 INFO L276 IsEmpty]: Start isEmpty. Operand 423 states and 1214 transitions. [2021-07-13 19:30:31,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-13 19:30:31,487 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:30:31,487 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:30:31,687 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1267 [2021-07-13 19:30:31,687 INFO L430 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:30:31,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:30:31,688 INFO L82 PathProgramCache]: Analyzing trace with hash -450417086, now seen corresponding path program 157 times [2021-07-13 19:30:31,688 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:30:31,688 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026902557] [2021-07-13 19:30:31,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:30:31,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:30:31,923 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:30:31,923 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:30:31,923 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026902557] [2021-07-13 19:30:31,923 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1026902557] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:30:31,923 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1900246690] [2021-07-13 19:30:31,923 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:30:31,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:30:31,950 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 19:30:31,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:30:32,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:30:32,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:30:32,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:30:32,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:30:32,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:30:32,442 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:30:32,443 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 33 [2021-07-13 19:30:32,444 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:30:32,459 INFO L628 ElimStorePlain]: treesize reduction 133, result has 7.6 percent of original size [2021-07-13 19:30:32,460 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:30:32,460 INFO L518 ElimStorePlain]: Eliminatee v_prenex_141 vanished before elimination [2021-07-13 19:30:32,460 INFO L518 ElimStorePlain]: Eliminatee v_prenex_142 vanished before elimination [2021-07-13 19:30:32,460 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:30:32,460 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:173, output treesize:11 [2021-07-13 19:30:32,482 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:30:32,482 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1900246690] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:30:32,482 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:30:32,482 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-07-13 19:30:32,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126887290] [2021-07-13 19:30:32,482 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:30:32,482 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:30:32,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:30:32,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:30:32,483 INFO L87 Difference]: Start difference. First operand 423 states and 1214 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:30:33,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:30:33,004 INFO L93 Difference]: Finished difference Result 506 states and 1376 transitions. [2021-07-13 19:30:33,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 19:30:33,004 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-13 19:30:33,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:30:33,005 INFO L225 Difference]: With dead ends: 506 [2021-07-13 19:30:33,005 INFO L226 Difference]: Without dead ends: 500 [2021-07-13 19:30:33,005 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 787.5ms TimeCoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:30:33,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 500 states. [2021-07-13 19:30:33,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 500 to 434. [2021-07-13 19:30:33,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 434 states, 433 states have (on average 2.884526558891455) internal successors, (1249), 433 states have internal predecessors, (1249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:30:33,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 434 states to 434 states and 1249 transitions. [2021-07-13 19:30:33,010 INFO L78 Accepts]: Start accepts. Automaton has 434 states and 1249 transitions. Word has length 16 [2021-07-13 19:30:33,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:30:33,010 INFO L482 AbstractCegarLoop]: Abstraction has 434 states and 1249 transitions. [2021-07-13 19:30:33,010 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:30:33,010 INFO L276 IsEmpty]: Start isEmpty. Operand 434 states and 1249 transitions. [2021-07-13 19:30:33,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-13 19:30:33,011 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:30:33,011 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:30:33,211 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1295,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:30:33,211 INFO L430 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:30:33,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:30:33,212 INFO L82 PathProgramCache]: Analyzing trace with hash -231780956, now seen corresponding path program 158 times [2021-07-13 19:30:33,212 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:30:33,212 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884007666] [2021-07-13 19:30:33,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:30:33,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:30:33,372 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:30:33,372 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:30:33,372 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884007666] [2021-07-13 19:30:33,372 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [884007666] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:30:33,372 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [791975182] [2021-07-13 19:30:33,372 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:30:33,410 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:30:33,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:30:33,411 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 45 conjunts are in the unsatisfiable core [2021-07-13 19:30:33,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:30:33,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:30:33,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:30:33,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:30:33,889 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:30:33,891 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:30:33,892 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 31 [2021-07-13 19:30:33,894 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:30:33,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:30:33,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:30:33,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:30:33,898 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:30:33,899 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 33 [2021-07-13 19:30:33,900 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:30:33,911 INFO L628 ElimStorePlain]: treesize reduction 101, result has 9.8 percent of original size [2021-07-13 19:30:33,912 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:30:33,912 INFO L518 ElimStorePlain]: Eliminatee v_prenex_143 vanished before elimination [2021-07-13 19:30:33,912 INFO L518 ElimStorePlain]: Eliminatee v_prenex_144 vanished before elimination [2021-07-13 19:30:33,912 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:30:33,912 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 6 variables, input treesize:161, output treesize:11 [2021-07-13 19:30:33,933 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:30:33,933 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [791975182] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:30:33,933 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:30:33,933 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-13 19:30:33,933 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290942424] [2021-07-13 19:30:33,933 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:30:33,933 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:30:33,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:30:33,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:30:33,934 INFO L87 Difference]: Start difference. First operand 434 states and 1249 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:30:34,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:30:34,230 INFO L93 Difference]: Finished difference Result 554 states and 1503 transitions. [2021-07-13 19:30:34,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:30:34,230 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-13 19:30:34,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:30:34,231 INFO L225 Difference]: With dead ends: 554 [2021-07-13 19:30:34,231 INFO L226 Difference]: Without dead ends: 551 [2021-07-13 19:30:34,231 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 577.4ms TimeCoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:30:34,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 551 states. [2021-07-13 19:30:34,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 551 to 459. [2021-07-13 19:30:34,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 459 states, 458 states have (on average 2.9017467248908297) internal successors, (1329), 458 states have internal predecessors, (1329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:30:34,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 459 states to 459 states and 1329 transitions. [2021-07-13 19:30:34,237 INFO L78 Accepts]: Start accepts. Automaton has 459 states and 1329 transitions. Word has length 16 [2021-07-13 19:30:34,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:30:34,237 INFO L482 AbstractCegarLoop]: Abstraction has 459 states and 1329 transitions. [2021-07-13 19:30:34,237 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:30:34,237 INFO L276 IsEmpty]: Start isEmpty. Operand 459 states and 1329 transitions. [2021-07-13 19:30:34,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-13 19:30:34,237 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:30:34,238 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:30:34,438 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 163 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1313 [2021-07-13 19:30:34,438 INFO L430 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:30:34,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:30:34,438 INFO L82 PathProgramCache]: Analyzing trace with hash -1713455554, now seen corresponding path program 159 times [2021-07-13 19:30:34,439 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:30:34,439 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227292403] [2021-07-13 19:30:34,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:30:34,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:30:34,740 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:30:34,740 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:30:34,740 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227292403] [2021-07-13 19:30:34,740 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [227292403] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:30:34,740 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [458997965] [2021-07-13 19:30:34,741 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:30:34,773 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:30:34,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:30:34,774 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 45 conjunts are in the unsatisfiable core [2021-07-13 19:30:34,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:30:35,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:30:35,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:30:35,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:30:35,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:30:35,161 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:30:35,164 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:30:35,172 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 23 [2021-07-13 19:30:35,173 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:30:35,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:30:35,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:30:35,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:30:35,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:30:35,179 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:30:35,182 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:30:35,182 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 31 [2021-07-13 19:30:35,183 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:30:35,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:30:35,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:30:35,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:30:35,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:30:35,189 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:30:35,192 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:30:35,196 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 39 [2021-07-13 19:30:35,197 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:30:35,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:30:35,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:30:35,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:30:35,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:30:35,203 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:30:35,203 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 31 [2021-07-13 19:30:35,205 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:30:35,268 INFO L628 ElimStorePlain]: treesize reduction 105, result has 41.0 percent of original size [2021-07-13 19:30:35,271 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:30:35,271 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-13 19:30:35,272 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-13 19:30:35,296 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:30:35,298 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:30:35,298 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:285, output treesize:56 [2021-07-13 19:30:35,373 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:30:35,374 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [458997965] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:30:35,374 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:30:35,374 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-13 19:30:35,374 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515931998] [2021-07-13 19:30:35,374 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:30:35,374 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:30:35,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:30:35,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:30:35,375 INFO L87 Difference]: Start difference. First operand 459 states and 1329 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:30:35,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:30:35,932 INFO L93 Difference]: Finished difference Result 495 states and 1394 transitions. [2021-07-13 19:30:35,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:30:35,932 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-13 19:30:35,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:30:35,933 INFO L225 Difference]: With dead ends: 495 [2021-07-13 19:30:35,933 INFO L226 Difference]: Without dead ends: 487 [2021-07-13 19:30:35,933 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 1008.3ms TimeCoverageRelationStatistics Valid=97, Invalid=503, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:30:35,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 487 states. [2021-07-13 19:30:35,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 487 to 464. [2021-07-13 19:30:35,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 464 states, 463 states have (on average 2.900647948164147) internal successors, (1343), 463 states have internal predecessors, (1343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:30:35,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 464 states to 464 states and 1343 transitions. [2021-07-13 19:30:35,939 INFO L78 Accepts]: Start accepts. Automaton has 464 states and 1343 transitions. Word has length 16 [2021-07-13 19:30:35,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:30:35,939 INFO L482 AbstractCegarLoop]: Abstraction has 464 states and 1343 transitions. [2021-07-13 19:30:35,939 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:30:35,939 INFO L276 IsEmpty]: Start isEmpty. Operand 464 states and 1343 transitions. [2021-07-13 19:30:35,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-13 19:30:35,940 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:30:35,940 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:30:36,140 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1329 [2021-07-13 19:30:36,140 INFO L430 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:30:36,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:30:36,141 INFO L82 PathProgramCache]: Analyzing trace with hash -640370174, now seen corresponding path program 160 times [2021-07-13 19:30:36,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:30:36,141 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552285943] [2021-07-13 19:30:36,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:30:36,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:30:36,265 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:30:36,266 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:30:36,266 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552285943] [2021-07-13 19:30:36,266 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [552285943] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:30:36,266 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1484261497] [2021-07-13 19:30:36,266 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:30:36,291 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:30:36,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:30:36,292 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 19:30:36,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:30:36,612 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:30:36,613 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:30:36,615 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 29 [2021-07-13 19:30:36,616 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:30:36,619 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:30:36,619 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:30:36,621 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 29 [2021-07-13 19:30:36,622 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:30:36,624 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:30:36,625 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 31 [2021-07-13 19:30:36,626 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:30:36,639 INFO L628 ElimStorePlain]: treesize reduction 76, result has 12.6 percent of original size [2021-07-13 19:30:36,639 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:30:36,639 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:30:36,639 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:149, output treesize:11 [2021-07-13 19:30:36,648 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:30:36,649 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1484261497] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:30:36,649 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:30:36,649 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-13 19:30:36,649 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687807273] [2021-07-13 19:30:36,649 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:30:36,649 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:30:36,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:30:36,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:30:36,649 INFO L87 Difference]: Start difference. First operand 464 states and 1343 transitions. Second operand has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:30:37,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:30:37,154 INFO L93 Difference]: Finished difference Result 571 states and 1546 transitions. [2021-07-13 19:30:37,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:30:37,154 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-13 19:30:37,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:30:37,155 INFO L225 Difference]: With dead ends: 571 [2021-07-13 19:30:37,155 INFO L226 Difference]: Without dead ends: 567 [2021-07-13 19:30:37,155 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 603.6ms TimeCoverageRelationStatistics Valid=79, Invalid=473, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:30:37,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 567 states. [2021-07-13 19:30:37,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 567 to 441. [2021-07-13 19:30:37,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 441 states, 440 states have (on average 2.8863636363636362) internal successors, (1270), 440 states have internal predecessors, (1270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:30:37,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 441 states to 441 states and 1270 transitions. [2021-07-13 19:30:37,161 INFO L78 Accepts]: Start accepts. Automaton has 441 states and 1270 transitions. Word has length 16 [2021-07-13 19:30:37,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:30:37,161 INFO L482 AbstractCegarLoop]: Abstraction has 441 states and 1270 transitions. [2021-07-13 19:30:37,161 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:30:37,161 INFO L276 IsEmpty]: Start isEmpty. Operand 441 states and 1270 transitions. [2021-07-13 19:30:37,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:30:37,162 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:30:37,162 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:30:37,362 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1350,165 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:30:37,362 INFO L430 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:30:37,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:30:37,363 INFO L82 PathProgramCache]: Analyzing trace with hash 2002561658, now seen corresponding path program 161 times [2021-07-13 19:30:37,363 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:30:37,363 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802518319] [2021-07-13 19:30:37,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:30:37,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:30:37,441 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:30:37,441 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:30:37,441 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802518319] [2021-07-13 19:30:37,441 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1802518319] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:30:37,441 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [669904379] [2021-07-13 19:30:37,441 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:30:37,468 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:30:37,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:30:37,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 19:30:37,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:30:37,574 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:30:37,575 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:30:37,577 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:30:37,578 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:30:37,579 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:30:37,581 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:30:37,581 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:30:37,583 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:30:37,584 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:30:37,586 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:30:37,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:30:37,587 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:30:37,588 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:30:37,589 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:30:37,609 INFO L628 ElimStorePlain]: treesize reduction 18, result has 52.6 percent of original size [2021-07-13 19:30:37,609 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:30:37,609 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:30:37,609 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 2 variables, input treesize:107, output treesize:20 [2021-07-13 19:30:37,635 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:30:37,635 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [669904379] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:30:37,635 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:30:37,635 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-07-13 19:30:37,635 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608979856] [2021-07-13 19:30:37,635 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:30:37,635 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:30:37,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:30:37,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:30:37,636 INFO L87 Difference]: Start difference. First operand 441 states and 1270 transitions. Second operand has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:30:37,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:30:37,966 INFO L93 Difference]: Finished difference Result 605 states and 1704 transitions. [2021-07-13 19:30:37,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:30:37,966 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:30:37,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:30:37,967 INFO L225 Difference]: With dead ends: 605 [2021-07-13 19:30:37,967 INFO L226 Difference]: Without dead ends: 594 [2021-07-13 19:30:37,967 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 339.3ms TimeCoverageRelationStatistics Valid=101, Invalid=549, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:30:37,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 594 states. [2021-07-13 19:30:37,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 594 to 438. [2021-07-13 19:30:37,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 438 states, 437 states have (on average 2.8924485125858124) internal successors, (1264), 437 states have internal predecessors, (1264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:30:37,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 438 states to 438 states and 1264 transitions. [2021-07-13 19:30:37,973 INFO L78 Accepts]: Start accepts. Automaton has 438 states and 1264 transitions. Word has length 17 [2021-07-13 19:30:37,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:30:37,973 INFO L482 AbstractCegarLoop]: Abstraction has 438 states and 1264 transitions. [2021-07-13 19:30:37,973 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:30:37,973 INFO L276 IsEmpty]: Start isEmpty. Operand 438 states and 1264 transitions. [2021-07-13 19:30:37,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:30:37,974 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:30:37,974 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:30:38,174 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1378,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:30:38,174 INFO L430 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:30:38,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:30:38,174 INFO L82 PathProgramCache]: Analyzing trace with hash 464142156, now seen corresponding path program 162 times [2021-07-13 19:30:38,175 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:30:38,175 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021922933] [2021-07-13 19:30:38,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:30:38,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:30:38,250 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:30:38,250 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:30:38,250 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021922933] [2021-07-13 19:30:38,250 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2021922933] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:30:38,250 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1099837450] [2021-07-13 19:30:38,251 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:30:38,277 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:30:38,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:30:38,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 19:30:38,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:30:38,370 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:30:38,371 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:30:38,371 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:30:38,373 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:30:38,374 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:30:38,388 INFO L628 ElimStorePlain]: treesize reduction 27, result has 30.8 percent of original size [2021-07-13 19:30:38,388 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:30:38,389 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:30:38,389 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:53, output treesize:12 [2021-07-13 19:30:38,407 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:30:38,407 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1099837450] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:30:38,407 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:30:38,407 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-07-13 19:30:38,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830516914] [2021-07-13 19:30:38,407 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:30:38,407 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:30:38,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:30:38,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:30:38,408 INFO L87 Difference]: Start difference. First operand 438 states and 1264 transitions. Second operand has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:30:38,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:30:38,593 INFO L93 Difference]: Finished difference Result 606 states and 1712 transitions. [2021-07-13 19:30:38,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:30:38,593 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:30:38,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:30:38,594 INFO L225 Difference]: With dead ends: 606 [2021-07-13 19:30:38,594 INFO L226 Difference]: Without dead ends: 606 [2021-07-13 19:30:38,594 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 171.4ms TimeCoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:30:38,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 606 states. [2021-07-13 19:30:38,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 606 to 439. [2021-07-13 19:30:38,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 439 states, 438 states have (on average 2.8926940639269407) internal successors, (1267), 438 states have internal predecessors, (1267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:30:38,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 439 states to 439 states and 1267 transitions. [2021-07-13 19:30:38,600 INFO L78 Accepts]: Start accepts. Automaton has 439 states and 1267 transitions. Word has length 17 [2021-07-13 19:30:38,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:30:38,600 INFO L482 AbstractCegarLoop]: Abstraction has 439 states and 1267 transitions. [2021-07-13 19:30:38,600 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:30:38,600 INFO L276 IsEmpty]: Start isEmpty. Operand 439 states and 1267 transitions. [2021-07-13 19:30:38,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:30:38,601 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:30:38,601 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:30:38,801 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1384,167 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:30:38,802 INFO L430 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:30:38,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:30:38,802 INFO L82 PathProgramCache]: Analyzing trace with hash 2101260346, now seen corresponding path program 163 times [2021-07-13 19:30:38,802 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:30:38,802 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624189558] [2021-07-13 19:30:38,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:30:38,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:30:38,900 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:30:38,900 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:30:38,900 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624189558] [2021-07-13 19:30:38,900 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1624189558] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:30:38,900 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [556061082] [2021-07-13 19:30:38,901 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:30:38,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:30:38,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 19:30:38,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:30:39,044 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:30:39,045 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:30:39,045 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:30:39,046 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:30:39,048 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:30:39,048 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:30:39,049 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:30:39,049 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:30:39,051 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:30:39,052 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:30:39,052 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:30:39,053 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:30:39,055 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:30:39,055 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:30:39,056 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:30:39,087 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-07-13 19:30:39,087 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:30:39,088 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:30:39,088 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-07-13 19:30:39,138 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:30:39,138 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [556061082] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:30:39,138 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:30:39,138 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-13 19:30:39,138 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380399320] [2021-07-13 19:30:39,138 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:30:39,139 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:30:39,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:30:39,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:30:39,139 INFO L87 Difference]: Start difference. First operand 439 states and 1267 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:30:39,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:30:39,412 INFO L93 Difference]: Finished difference Result 671 states and 1821 transitions. [2021-07-13 19:30:39,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 19:30:39,412 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:30:39,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:30:39,413 INFO L225 Difference]: With dead ends: 671 [2021-07-13 19:30:39,413 INFO L226 Difference]: Without dead ends: 671 [2021-07-13 19:30:39,413 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 309.1ms TimeCoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:30:39,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 671 states. [2021-07-13 19:30:39,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 671 to 449. [2021-07-13 19:30:39,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 449 states, 448 states have (on average 2.904017857142857) internal successors, (1301), 448 states have internal predecessors, (1301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:30:39,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 449 states to 449 states and 1301 transitions. [2021-07-13 19:30:39,419 INFO L78 Accepts]: Start accepts. Automaton has 449 states and 1301 transitions. Word has length 17 [2021-07-13 19:30:39,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:30:39,420 INFO L482 AbstractCegarLoop]: Abstraction has 449 states and 1301 transitions. [2021-07-13 19:30:39,420 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:30:39,420 INFO L276 IsEmpty]: Start isEmpty. Operand 449 states and 1301 transitions. [2021-07-13 19:30:39,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:30:39,420 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:30:39,420 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:30:39,621 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 168 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1386 [2021-07-13 19:30:39,621 INFO L430 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:30:39,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:30:39,621 INFO L82 PathProgramCache]: Analyzing trace with hash -1392090722, now seen corresponding path program 164 times [2021-07-13 19:30:39,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:30:39,621 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444304818] [2021-07-13 19:30:39,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:30:39,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:30:39,720 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:30:39,720 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:30:39,720 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444304818] [2021-07-13 19:30:39,720 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [444304818] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:30:39,720 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1133731047] [2021-07-13 19:30:39,720 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:30:39,747 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:30:39,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:30:39,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 19:30:39,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:30:39,858 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:30:39,858 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:30:39,859 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:30:39,859 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:30:39,861 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:30:39,862 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:30:39,862 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:30:39,863 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:30:39,865 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:30:39,865 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:30:39,865 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:30:39,866 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:30:39,868 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:30:39,868 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:30:39,869 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:30:39,901 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-07-13 19:30:39,901 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:30:39,902 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:30:39,902 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-07-13 19:30:39,974 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:30:39,975 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1133731047] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:30:39,975 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:30:39,975 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-13 19:30:39,975 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463263721] [2021-07-13 19:30:39,975 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:30:39,975 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:30:39,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:30:39,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:30:39,975 INFO L87 Difference]: Start difference. First operand 449 states and 1301 transitions. Second operand has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:30:40,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:30:40,935 INFO L93 Difference]: Finished difference Result 687 states and 1849 transitions. [2021-07-13 19:30:40,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-13 19:30:40,935 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:30:40,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:30:40,936 INFO L225 Difference]: With dead ends: 687 [2021-07-13 19:30:40,936 INFO L226 Difference]: Without dead ends: 678 [2021-07-13 19:30:40,937 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 318 ImplicationChecksByTransitivity, 872.2ms TimeCoverageRelationStatistics Valid=194, Invalid=1288, Unknown=0, NotChecked=0, Total=1482 [2021-07-13 19:30:40,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 678 states. [2021-07-13 19:30:40,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 678 to 454. [2021-07-13 19:30:40,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 454 states, 453 states have (on average 2.905077262693157) internal successors, (1316), 453 states have internal predecessors, (1316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:30:40,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 454 states to 454 states and 1316 transitions. [2021-07-13 19:30:40,943 INFO L78 Accepts]: Start accepts. Automaton has 454 states and 1316 transitions. Word has length 17 [2021-07-13 19:30:40,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:30:40,943 INFO L482 AbstractCegarLoop]: Abstraction has 454 states and 1316 transitions. [2021-07-13 19:30:40,943 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:30:40,943 INFO L276 IsEmpty]: Start isEmpty. Operand 454 states and 1316 transitions. [2021-07-13 19:30:40,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:30:40,944 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:30:40,944 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:30:41,144 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1390 [2021-07-13 19:30:41,144 INFO L430 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:30:41,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:30:41,144 INFO L82 PathProgramCache]: Analyzing trace with hash 326252984, now seen corresponding path program 165 times [2021-07-13 19:30:41,144 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:30:41,145 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124854603] [2021-07-13 19:30:41,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:30:41,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:30:41,238 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:30:41,238 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:30:41,238 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124854603] [2021-07-13 19:30:41,238 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124854603] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:30:41,238 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [894425783] [2021-07-13 19:30:41,238 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:30:41,266 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 19:30:41,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:30:41,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 19:30:41,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:30:41,381 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:30:41,382 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:30:41,382 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:30:41,383 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:30:41,385 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:30:41,386 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:30:41,387 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:30:41,388 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:30:41,390 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:30:41,391 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:30:41,391 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:30:41,392 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:30:41,394 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:30:41,394 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:30:41,395 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:30:41,438 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-07-13 19:30:41,438 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:30:41,439 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:30:41,439 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-07-13 19:30:41,489 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:30:41,489 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [894425783] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:30:41,489 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:30:41,489 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-13 19:30:41,489 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237761307] [2021-07-13 19:30:41,489 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:30:41,489 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:30:41,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:30:41,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:30:41,490 INFO L87 Difference]: Start difference. First operand 454 states and 1316 transitions. Second operand has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:30:42,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:30:42,077 INFO L93 Difference]: Finished difference Result 665 states and 1818 transitions. [2021-07-13 19:30:42,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-13 19:30:42,077 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:30:42,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:30:42,078 INFO L225 Difference]: With dead ends: 665 [2021-07-13 19:30:42,078 INFO L226 Difference]: Without dead ends: 665 [2021-07-13 19:30:42,078 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 533.1ms TimeCoverageRelationStatistics Valid=123, Invalid=747, Unknown=0, NotChecked=0, Total=870 [2021-07-13 19:30:42,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 665 states. [2021-07-13 19:30:42,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 665 to 450. [2021-07-13 19:30:42,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 450 states, 449 states have (on average 2.893095768374165) internal successors, (1299), 449 states have internal predecessors, (1299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:30:42,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 450 states to 450 states and 1299 transitions. [2021-07-13 19:30:42,084 INFO L78 Accepts]: Start accepts. Automaton has 450 states and 1299 transitions. Word has length 17 [2021-07-13 19:30:42,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:30:42,084 INFO L482 AbstractCegarLoop]: Abstraction has 450 states and 1299 transitions. [2021-07-13 19:30:42,084 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:30:42,084 INFO L276 IsEmpty]: Start isEmpty. Operand 450 states and 1299 transitions. [2021-07-13 19:30:42,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:30:42,085 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:30:42,085 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:30:42,285 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1395,170 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:30:42,285 INFO L430 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:30:42,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:30:42,286 INFO L82 PathProgramCache]: Analyzing trace with hash -1384360324, now seen corresponding path program 166 times [2021-07-13 19:30:42,286 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:30:42,286 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348382024] [2021-07-13 19:30:42,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:30:42,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:30:42,378 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:30:42,378 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:30:42,378 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348382024] [2021-07-13 19:30:42,378 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [348382024] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:30:42,378 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [474145711] [2021-07-13 19:30:42,379 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:30:42,406 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:30:42,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:30:42,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 19:30:42,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:30:42,544 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:30:42,545 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:30:42,545 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:30:42,546 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:30:42,555 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:30:42,555 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:30:42,556 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:30:42,577 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-07-13 19:30:42,577 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:30:42,579 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:30:42,579 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-07-13 19:30:42,610 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:30:42,610 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [474145711] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:30:42,610 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:30:42,610 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-13 19:30:42,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029880462] [2021-07-13 19:30:42,610 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:30:42,610 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:30:42,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:30:42,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:30:42,611 INFO L87 Difference]: Start difference. First operand 450 states and 1299 transitions. Second operand has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:30:43,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:30:43,141 INFO L93 Difference]: Finished difference Result 719 states and 1930 transitions. [2021-07-13 19:30:43,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-13 19:30:43,141 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:30:43,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:30:43,142 INFO L225 Difference]: With dead ends: 719 [2021-07-13 19:30:43,142 INFO L226 Difference]: Without dead ends: 719 [2021-07-13 19:30:43,142 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 505.5ms TimeCoverageRelationStatistics Valid=143, Invalid=913, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 19:30:43,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 719 states. [2021-07-13 19:30:43,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 719 to 459. [2021-07-13 19:30:43,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 459 states, 458 states have (on average 2.906113537117904) internal successors, (1331), 458 states have internal predecessors, (1331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:30:43,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 459 states to 459 states and 1331 transitions. [2021-07-13 19:30:43,149 INFO L78 Accepts]: Start accepts. Automaton has 459 states and 1331 transitions. Word has length 17 [2021-07-13 19:30:43,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:30:43,149 INFO L482 AbstractCegarLoop]: Abstraction has 459 states and 1331 transitions. [2021-07-13 19:30:43,149 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:30:43,149 INFO L276 IsEmpty]: Start isEmpty. Operand 459 states and 1331 transitions. [2021-07-13 19:30:43,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:30:43,150 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:30:43,150 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:30:43,350 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1399 [2021-07-13 19:30:43,350 INFO L430 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:30:43,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:30:43,351 INFO L82 PathProgramCache]: Analyzing trace with hash 1421201976, now seen corresponding path program 167 times [2021-07-13 19:30:43,351 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:30:43,351 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272932298] [2021-07-13 19:30:43,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:30:43,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:30:43,452 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:30:43,453 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:30:43,453 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272932298] [2021-07-13 19:30:43,453 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [272932298] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:30:43,453 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [847775260] [2021-07-13 19:30:43,453 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:30:43,480 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:30:43,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:30:43,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 19:30:43,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:30:43,611 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:30:43,612 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:30:43,612 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:30:43,613 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:30:43,615 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:30:43,615 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:30:43,616 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:30:43,637 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-07-13 19:30:43,637 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:30:43,638 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:30:43,638 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-07-13 19:30:43,659 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:30:43,659 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [847775260] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:30:43,660 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:30:43,660 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-13 19:30:43,660 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400049470] [2021-07-13 19:30:43,660 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:30:43,660 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:30:43,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:30:43,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:30:43,660 INFO L87 Difference]: Start difference. First operand 459 states and 1331 transitions. Second operand has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:30:44,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:30:44,139 INFO L93 Difference]: Finished difference Result 675 states and 1881 transitions. [2021-07-13 19:30:44,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 19:30:44,140 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:30:44,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:30:44,141 INFO L225 Difference]: With dead ends: 675 [2021-07-13 19:30:44,141 INFO L226 Difference]: Without dead ends: 675 [2021-07-13 19:30:44,141 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 483.8ms TimeCoverageRelationStatistics Valid=123, Invalid=689, Unknown=0, NotChecked=0, Total=812 [2021-07-13 19:30:44,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 675 states. [2021-07-13 19:30:44,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 675 to 461. [2021-07-13 19:30:44,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 461 states, 460 states have (on average 2.9065217391304348) internal successors, (1337), 460 states have internal predecessors, (1337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:30:44,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 461 states to 461 states and 1337 transitions. [2021-07-13 19:30:44,148 INFO L78 Accepts]: Start accepts. Automaton has 461 states and 1337 transitions. Word has length 17 [2021-07-13 19:30:44,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:30:44,148 INFO L482 AbstractCegarLoop]: Abstraction has 461 states and 1337 transitions. [2021-07-13 19:30:44,148 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:30:44,148 INFO L276 IsEmpty]: Start isEmpty. Operand 461 states and 1337 transitions. [2021-07-13 19:30:44,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:30:44,149 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:30:44,149 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:30:44,349 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1402,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:30:44,349 INFO L430 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:30:44,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:30:44,349 INFO L82 PathProgramCache]: Analyzing trace with hash -1800679940, now seen corresponding path program 168 times [2021-07-13 19:30:44,350 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:30:44,350 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166836796] [2021-07-13 19:30:44,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:30:44,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:30:44,437 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:30:44,437 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:30:44,437 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166836796] [2021-07-13 19:30:44,437 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1166836796] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:30:44,437 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1991827542] [2021-07-13 19:30:44,437 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:30:44,464 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:30:44,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:30:44,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 19:30:44,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:30:44,604 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:30:44,605 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:30:44,605 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:30:44,606 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:30:44,609 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:30:44,609 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:30:44,610 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:30:44,631 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-07-13 19:30:44,631 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:30:44,632 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:30:44,632 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-07-13 19:30:44,652 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:30:44,652 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1991827542] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:30:44,652 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:30:44,652 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-13 19:30:44,652 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169224233] [2021-07-13 19:30:44,653 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:30:44,653 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:30:44,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:30:44,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:30:44,653 INFO L87 Difference]: Start difference. First operand 461 states and 1337 transitions. Second operand has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:30:44,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:30:44,841 INFO L93 Difference]: Finished difference Result 629 states and 1785 transitions. [2021-07-13 19:30:44,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:30:44,842 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:30:44,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:30:44,843 INFO L225 Difference]: With dead ends: 629 [2021-07-13 19:30:44,843 INFO L226 Difference]: Without dead ends: 629 [2021-07-13 19:30:44,843 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 183.4ms TimeCoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:30:44,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 629 states. [2021-07-13 19:30:44,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 629 to 461. [2021-07-13 19:30:44,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 461 states, 460 states have (on average 2.9065217391304348) internal successors, (1337), 460 states have internal predecessors, (1337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:30:44,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 461 states to 461 states and 1337 transitions. [2021-07-13 19:30:44,849 INFO L78 Accepts]: Start accepts. Automaton has 461 states and 1337 transitions. Word has length 17 [2021-07-13 19:30:44,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:30:44,849 INFO L482 AbstractCegarLoop]: Abstraction has 461 states and 1337 transitions. [2021-07-13 19:30:44,849 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:30:44,849 INFO L276 IsEmpty]: Start isEmpty. Operand 461 states and 1337 transitions. [2021-07-13 19:30:44,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:30:44,850 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:30:44,850 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:30:45,050 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1405,173 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:30:45,050 INFO L430 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:30:45,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:30:45,051 INFO L82 PathProgramCache]: Analyzing trace with hash 1235007934, now seen corresponding path program 169 times [2021-07-13 19:30:45,051 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:30:45,051 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633529864] [2021-07-13 19:30:45,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:30:45,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:30:45,129 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:30:45,129 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:30:45,129 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633529864] [2021-07-13 19:30:45,129 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [633529864] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:30:45,129 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [990980878] [2021-07-13 19:30:45,130 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:30:45,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:30:45,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 19:30:45,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:30:45,247 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:30:45,248 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:30:45,248 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:30:45,249 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:30:45,251 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:30:45,251 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:30:45,251 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:30:45,268 INFO L628 ElimStorePlain]: treesize reduction 30, result has 33.3 percent of original size [2021-07-13 19:30:45,268 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:30:45,269 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:30:45,269 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:59, output treesize:15 [2021-07-13 19:30:45,290 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:30:45,290 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [990980878] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:30:45,290 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:30:45,290 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-13 19:30:45,290 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272119325] [2021-07-13 19:30:45,290 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:30:45,290 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:30:45,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:30:45,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:30:45,291 INFO L87 Difference]: Start difference. First operand 461 states and 1337 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:30:45,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:30:45,630 INFO L93 Difference]: Finished difference Result 680 states and 1840 transitions. [2021-07-13 19:30:45,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 19:30:45,630 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:30:45,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:30:45,631 INFO L225 Difference]: With dead ends: 680 [2021-07-13 19:30:45,631 INFO L226 Difference]: Without dead ends: 680 [2021-07-13 19:30:45,631 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 237.0ms TimeCoverageRelationStatistics Valid=78, Invalid=572, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:30:45,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 680 states. [2021-07-13 19:30:45,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 680 to 532. [2021-07-13 19:30:45,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 532 states, 531 states have (on average 2.9661016949152543) internal successors, (1575), 531 states have internal predecessors, (1575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:30:45,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 532 states to 532 states and 1575 transitions. [2021-07-13 19:30:45,638 INFO L78 Accepts]: Start accepts. Automaton has 532 states and 1575 transitions. Word has length 17 [2021-07-13 19:30:45,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:30:45,638 INFO L482 AbstractCegarLoop]: Abstraction has 532 states and 1575 transitions. [2021-07-13 19:30:45,638 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:30:45,638 INFO L276 IsEmpty]: Start isEmpty. Operand 532 states and 1575 transitions. [2021-07-13 19:30:45,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:30:45,639 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:30:45,639 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:30:45,839 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1408,174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:30:45,839 INFO L430 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:30:45,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:30:45,839 INFO L82 PathProgramCache]: Analyzing trace with hash 315307226, now seen corresponding path program 170 times [2021-07-13 19:30:45,840 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:30:45,840 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516343277] [2021-07-13 19:30:45,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:30:45,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:30:45,913 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:30:45,913 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:30:45,913 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516343277] [2021-07-13 19:30:45,913 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [516343277] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:30:45,913 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1515232199] [2021-07-13 19:30:45,913 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:30:45,939 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:30:45,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:30:45,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 19:30:45,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:30:46,036 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:30:46,037 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:30:46,040 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:30:46,040 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:30:46,040 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:30:46,041 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:30:46,043 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:30:46,044 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:30:46,046 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:30:46,046 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:30:46,046 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:30:46,047 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:30:46,049 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:30:46,050 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:30:46,051 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:30:46,052 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:30:46,078 INFO L628 ElimStorePlain]: treesize reduction 21, result has 58.0 percent of original size [2021-07-13 19:30:46,078 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:30:46,079 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:30:46,079 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 2 variables, input treesize:125, output treesize:29 [2021-07-13 19:30:46,109 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:30:46,109 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1515232199] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:30:46,109 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:30:46,109 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-13 19:30:46,109 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890118571] [2021-07-13 19:30:46,109 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:30:46,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:30:46,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:30:46,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:30:46,110 INFO L87 Difference]: Start difference. First operand 532 states and 1575 transitions. Second operand has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:30:46,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:30:46,544 INFO L93 Difference]: Finished difference Result 637 states and 1759 transitions. [2021-07-13 19:30:46,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-13 19:30:46,544 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:30:46,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:30:46,545 INFO L225 Difference]: With dead ends: 637 [2021-07-13 19:30:46,545 INFO L226 Difference]: Without dead ends: 633 [2021-07-13 19:30:46,545 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 365.5ms TimeCoverageRelationStatistics Valid=113, Invalid=817, Unknown=0, NotChecked=0, Total=930 [2021-07-13 19:30:46,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 633 states. [2021-07-13 19:30:46,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 633 to 534. [2021-07-13 19:30:46,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 534 states, 533 states have (on average 2.949343339587242) internal successors, (1572), 533 states have internal predecessors, (1572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:30:46,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 534 states to 534 states and 1572 transitions. [2021-07-13 19:30:46,551 INFO L78 Accepts]: Start accepts. Automaton has 534 states and 1572 transitions. Word has length 17 [2021-07-13 19:30:46,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:30:46,551 INFO L482 AbstractCegarLoop]: Abstraction has 534 states and 1572 transitions. [2021-07-13 19:30:46,551 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:30:46,551 INFO L276 IsEmpty]: Start isEmpty. Operand 534 states and 1572 transitions. [2021-07-13 19:30:46,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:30:46,552 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:30:46,552 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:30:46,753 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1410 [2021-07-13 19:30:46,753 INFO L430 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:30:46,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:30:46,753 INFO L82 PathProgramCache]: Analyzing trace with hash 1242738332, now seen corresponding path program 171 times [2021-07-13 19:30:46,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:30:46,753 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222323475] [2021-07-13 19:30:46,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:30:46,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:30:46,849 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:30:46,849 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:30:46,849 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222323475] [2021-07-13 19:30:46,849 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1222323475] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:30:46,850 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1552355480] [2021-07-13 19:30:46,850 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:30:46,877 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 19:30:46,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:30:46,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 19:30:46,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:30:46,956 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:30:46,957 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:30:46,957 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:30:46,958 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:30:46,960 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:30:46,960 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:30:46,960 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:30:46,961 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:30:46,963 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:30:46,963 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:30:46,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:30:46,964 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:30:46,966 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:30:46,966 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:30:46,967 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:30:46,999 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-07-13 19:30:46,999 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:30:46,999 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:30:47,000 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-07-13 19:30:47,048 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:30:47,048 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1552355480] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:30:47,049 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:30:47,049 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-13 19:30:47,049 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597471416] [2021-07-13 19:30:47,049 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:30:47,049 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:30:47,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:30:47,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:30:47,049 INFO L87 Difference]: Start difference. First operand 534 states and 1572 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:30:47,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:30:47,532 INFO L93 Difference]: Finished difference Result 702 states and 1885 transitions. [2021-07-13 19:30:47,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-13 19:30:47,532 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:30:47,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:30:47,533 INFO L225 Difference]: With dead ends: 702 [2021-07-13 19:30:47,533 INFO L226 Difference]: Without dead ends: 701 [2021-07-13 19:30:47,533 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 403.6ms TimeCoverageRelationStatistics Valid=102, Invalid=710, Unknown=0, NotChecked=0, Total=812 [2021-07-13 19:30:47,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 701 states. [2021-07-13 19:30:47,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 701 to 541. [2021-07-13 19:30:47,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 541 states, 540 states have (on average 2.9611111111111112) internal successors, (1599), 540 states have internal predecessors, (1599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:30:47,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 541 states to 541 states and 1599 transitions. [2021-07-13 19:30:47,540 INFO L78 Accepts]: Start accepts. Automaton has 541 states and 1599 transitions. Word has length 17 [2021-07-13 19:30:47,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:30:47,540 INFO L482 AbstractCegarLoop]: Abstraction has 541 states and 1599 transitions. [2021-07-13 19:30:47,540 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:30:47,540 INFO L276 IsEmpty]: Start isEmpty. Operand 541 states and 1599 transitions. [2021-07-13 19:30:47,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:30:47,541 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:30:47,541 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:30:47,741 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1415 [2021-07-13 19:30:47,741 INFO L430 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:30:47,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:30:47,741 INFO L82 PathProgramCache]: Analyzing trace with hash 2044354560, now seen corresponding path program 172 times [2021-07-13 19:30:47,742 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:30:47,742 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516059863] [2021-07-13 19:30:47,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:30:47,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:30:47,824 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:30:47,824 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:30:47,824 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516059863] [2021-07-13 19:30:47,824 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [516059863] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:30:47,824 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [378006337] [2021-07-13 19:30:47,824 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:30:47,852 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:30:47,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:30:47,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 19:30:47,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:30:47,929 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:30:47,929 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:30:47,930 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:30:47,930 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:30:47,932 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:30:47,933 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:30:47,933 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:30:47,934 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:30:47,936 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:30:47,936 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:30:47,936 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:30:47,937 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:30:47,939 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:30:47,939 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:30:47,940 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:30:47,972 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-07-13 19:30:47,972 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:30:47,972 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:30:47,972 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-07-13 19:30:48,049 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:30:48,049 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [378006337] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:30:48,050 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:30:48,050 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-13 19:30:48,050 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836358156] [2021-07-13 19:30:48,050 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:30:48,050 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:30:48,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:30:48,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:30:48,050 INFO L87 Difference]: Start difference. First operand 541 states and 1599 transitions. Second operand has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:30:48,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:30:48,738 INFO L93 Difference]: Finished difference Result 712 states and 1917 transitions. [2021-07-13 19:30:48,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-07-13 19:30:48,738 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:30:48,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:30:48,739 INFO L225 Difference]: With dead ends: 712 [2021-07-13 19:30:48,740 INFO L226 Difference]: Without dead ends: 708 [2021-07-13 19:30:48,740 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 327 ImplicationChecksByTransitivity, 567.7ms TimeCoverageRelationStatistics Valid=175, Invalid=1231, Unknown=0, NotChecked=0, Total=1406 [2021-07-13 19:30:48,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 708 states. [2021-07-13 19:30:48,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 708 to 552. [2021-07-13 19:30:48,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 552 states, 551 states have (on average 2.9600725952813067) internal successors, (1631), 551 states have internal predecessors, (1631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:30:48,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 552 states to 552 states and 1631 transitions. [2021-07-13 19:30:48,747 INFO L78 Accepts]: Start accepts. Automaton has 552 states and 1631 transitions. Word has length 17 [2021-07-13 19:30:48,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:30:48,747 INFO L482 AbstractCegarLoop]: Abstraction has 552 states and 1631 transitions. [2021-07-13 19:30:48,747 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:30:48,747 INFO L276 IsEmpty]: Start isEmpty. Operand 552 states and 1631 transitions. [2021-07-13 19:30:48,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:30:48,748 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:30:48,748 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:30:48,948 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1419,177 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:30:48,948 INFO L430 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:30:48,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:30:48,949 INFO L82 PathProgramCache]: Analyzing trace with hash -532269030, now seen corresponding path program 173 times [2021-07-13 19:30:48,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:30:48,949 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434380013] [2021-07-13 19:30:48,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:30:48,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:30:49,041 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:30:49,041 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:30:49,041 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434380013] [2021-07-13 19:30:49,041 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [434380013] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:30:49,041 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1326137766] [2021-07-13 19:30:49,041 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:30:49,070 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:30:49,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:30:49,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 19:30:49,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:30:49,148 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:30:49,149 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:30:49,149 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:30:49,150 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:30:49,152 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:30:49,152 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:30:49,152 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:30:49,153 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:30:49,155 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:30:49,155 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:30:49,156 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:30:49,156 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:30:49,158 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:30:49,158 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:30:49,159 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:30:49,191 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-07-13 19:30:49,191 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:30:49,192 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:30:49,192 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-07-13 19:30:49,239 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:30:49,239 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1326137766] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:30:49,239 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:30:49,239 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-13 19:30:49,239 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709154834] [2021-07-13 19:30:49,239 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:30:49,239 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:30:49,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:30:49,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:30:49,240 INFO L87 Difference]: Start difference. First operand 552 states and 1631 transitions. Second operand has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:30:49,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:30:49,803 INFO L93 Difference]: Finished difference Result 698 states and 1886 transitions. [2021-07-13 19:30:49,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-13 19:30:49,803 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:30:49,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:30:49,804 INFO L225 Difference]: With dead ends: 698 [2021-07-13 19:30:49,804 INFO L226 Difference]: Without dead ends: 698 [2021-07-13 19:30:49,804 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 478.9ms TimeCoverageRelationStatistics Valid=146, Invalid=846, Unknown=0, NotChecked=0, Total=992 [2021-07-13 19:30:49,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 698 states. [2021-07-13 19:30:49,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 698 to 535. [2021-07-13 19:30:49,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 535 states, 534 states have (on average 2.9344569288389515) internal successors, (1567), 534 states have internal predecessors, (1567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:30:49,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 535 states to 535 states and 1567 transitions. [2021-07-13 19:30:49,811 INFO L78 Accepts]: Start accepts. Automaton has 535 states and 1567 transitions. Word has length 17 [2021-07-13 19:30:49,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:30:49,811 INFO L482 AbstractCegarLoop]: Abstraction has 535 states and 1567 transitions. [2021-07-13 19:30:49,811 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:30:49,811 INFO L276 IsEmpty]: Start isEmpty. Operand 535 states and 1567 transitions. [2021-07-13 19:30:49,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:30:49,812 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:30:49,812 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:30:50,012 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1424 [2021-07-13 19:30:50,013 INFO L430 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:30:50,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:30:50,013 INFO L82 PathProgramCache]: Analyzing trace with hash 1360854522, now seen corresponding path program 174 times [2021-07-13 19:30:50,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:30:50,013 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37449857] [2021-07-13 19:30:50,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:30:50,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:30:50,099 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:30:50,099 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:30:50,099 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37449857] [2021-07-13 19:30:50,099 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [37449857] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:30:50,099 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1458483899] [2021-07-13 19:30:50,099 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:30:50,129 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:30:50,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:30:50,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 19:30:50,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:30:50,200 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:30:50,201 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:30:50,201 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:30:50,202 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:30:50,204 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:30:50,204 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:30:50,204 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:30:50,205 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:30:50,207 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:30:50,207 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:30:50,207 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:30:50,208 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:30:50,210 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:30:50,210 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:30:50,211 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:30:50,243 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-07-13 19:30:50,243 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:30:50,243 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:30:50,244 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-07-13 19:30:50,310 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:30:50,310 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1458483899] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:30:50,310 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:30:50,310 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-13 19:30:50,310 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830770704] [2021-07-13 19:30:50,311 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:30:50,311 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:30:50,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:30:50,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:30:50,311 INFO L87 Difference]: Start difference. First operand 535 states and 1567 transitions. Second operand has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:30:51,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:30:51,044 INFO L93 Difference]: Finished difference Result 721 states and 1917 transitions. [2021-07-13 19:30:51,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-07-13 19:30:51,044 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:30:51,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:30:51,045 INFO L225 Difference]: With dead ends: 721 [2021-07-13 19:30:51,045 INFO L226 Difference]: Without dead ends: 716 [2021-07-13 19:30:51,045 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 421 ImplicationChecksByTransitivity, 535.8ms TimeCoverageRelationStatistics Valid=181, Invalid=1459, Unknown=0, NotChecked=0, Total=1640 [2021-07-13 19:30:51,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 716 states. [2021-07-13 19:30:51,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 716 to 555. [2021-07-13 19:30:51,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 555 states, 554 states have (on average 2.9422382671480145) internal successors, (1630), 554 states have internal predecessors, (1630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:30:51,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 555 states to 555 states and 1630 transitions. [2021-07-13 19:30:51,052 INFO L78 Accepts]: Start accepts. Automaton has 555 states and 1630 transitions. Word has length 17 [2021-07-13 19:30:51,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:30:51,052 INFO L482 AbstractCegarLoop]: Abstraction has 555 states and 1630 transitions. [2021-07-13 19:30:51,052 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:30:51,052 INFO L276 IsEmpty]: Start isEmpty. Operand 555 states and 1630 transitions. [2021-07-13 19:30:51,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:30:51,053 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:30:51,053 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:30:51,253 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1428,179 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:30:51,254 INFO L430 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:30:51,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:30:51,254 INFO L82 PathProgramCache]: Analyzing trace with hash -1205065440, now seen corresponding path program 175 times [2021-07-13 19:30:51,254 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:30:51,254 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945156225] [2021-07-13 19:30:51,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:30:51,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:30:51,336 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:30:51,337 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:30:51,337 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945156225] [2021-07-13 19:30:51,337 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [945156225] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:30:51,337 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1848567302] [2021-07-13 19:30:51,337 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:30:51,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:30:51,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 19:30:51,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:30:51,484 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:30:51,485 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:30:51,485 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:30:51,486 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:30:51,488 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:30:51,489 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:30:51,491 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:30:51,491 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:30:51,494 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:30:51,494 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:30:51,497 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:30:51,497 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:30:51,497 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:30:51,498 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:30:51,500 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:30:51,501 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:30:51,529 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-07-13 19:30:51,530 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:30:51,530 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:30:51,530 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-07-13 19:30:51,556 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:30:51,556 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1848567302] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:30:51,556 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:30:51,556 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-13 19:30:51,556 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539080169] [2021-07-13 19:30:51,556 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:30:51,556 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:30:51,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:30:51,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:30:51,557 INFO L87 Difference]: Start difference. First operand 555 states and 1630 transitions. Second operand has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:30:51,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:30:51,984 INFO L93 Difference]: Finished difference Result 663 states and 1818 transitions. [2021-07-13 19:30:51,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-13 19:30:51,985 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:30:51,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:30:51,986 INFO L225 Difference]: With dead ends: 663 [2021-07-13 19:30:51,986 INFO L226 Difference]: Without dead ends: 655 [2021-07-13 19:30:51,990 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 396.1ms TimeCoverageRelationStatistics Valid=124, Invalid=932, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 19:30:51,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 655 states. [2021-07-13 19:30:51,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 655 to 559. [2021-07-13 19:30:51,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 559 states, 558 states have (on average 2.921146953405018) internal successors, (1630), 558 states have internal predecessors, (1630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:30:51,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 559 states to 559 states and 1630 transitions. [2021-07-13 19:30:51,997 INFO L78 Accepts]: Start accepts. Automaton has 559 states and 1630 transitions. Word has length 17 [2021-07-13 19:30:51,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:30:51,997 INFO L482 AbstractCegarLoop]: Abstraction has 559 states and 1630 transitions. [2021-07-13 19:30:51,997 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:30:51,997 INFO L276 IsEmpty]: Start isEmpty. Operand 559 states and 1630 transitions. [2021-07-13 19:30:51,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:30:51,998 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:30:51,998 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:30:52,198 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1434,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:30:52,199 INFO L430 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:30:52,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:30:52,199 INFO L82 PathProgramCache]: Analyzing trace with hash 562679962, now seen corresponding path program 176 times [2021-07-13 19:30:52,199 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:30:52,199 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221412131] [2021-07-13 19:30:52,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:30:52,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:30:52,283 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:30:52,283 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:30:52,284 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221412131] [2021-07-13 19:30:52,284 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [221412131] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:30:52,284 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2139212977] [2021-07-13 19:30:52,284 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:30:52,311 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:30:52,311 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:30:52,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 19:30:52,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:30:52,415 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:30:52,416 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:30:52,416 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:30:52,417 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:30:52,419 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:30:52,419 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:30:52,420 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:30:52,443 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-07-13 19:30:52,444 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:30:52,444 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:30:52,445 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-07-13 19:30:52,465 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:30:52,466 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2139212977] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:30:52,466 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:30:52,466 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-13 19:30:52,466 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302857629] [2021-07-13 19:30:52,466 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:30:52,466 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:30:52,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:30:52,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:30:52,466 INFO L87 Difference]: Start difference. First operand 559 states and 1630 transitions. Second operand has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:30:52,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:30:52,856 INFO L93 Difference]: Finished difference Result 785 states and 2063 transitions. [2021-07-13 19:30:52,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-13 19:30:52,857 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:30:52,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:30:52,858 INFO L225 Difference]: With dead ends: 785 [2021-07-13 19:30:52,858 INFO L226 Difference]: Without dead ends: 785 [2021-07-13 19:30:52,858 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 299.6ms TimeCoverageRelationStatistics Valid=110, Invalid=760, Unknown=0, NotChecked=0, Total=870 [2021-07-13 19:30:52,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 785 states. [2021-07-13 19:30:52,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 785 to 562. [2021-07-13 19:30:52,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 562 states, 561 states have (on average 2.9180035650623886) internal successors, (1637), 561 states have internal predecessors, (1637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:30:52,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 562 states to 562 states and 1637 transitions. [2021-07-13 19:30:52,865 INFO L78 Accepts]: Start accepts. Automaton has 562 states and 1637 transitions. Word has length 17 [2021-07-13 19:30:52,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:30:52,865 INFO L482 AbstractCegarLoop]: Abstraction has 562 states and 1637 transitions. [2021-07-13 19:30:52,865 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:30:52,865 INFO L276 IsEmpty]: Start isEmpty. Operand 562 states and 1637 transitions. [2021-07-13 19:30:52,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:30:52,866 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:30:52,866 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:30:53,066 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 181 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1441 [2021-07-13 19:30:53,067 INFO L430 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:30:53,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:30:53,067 INFO L82 PathProgramCache]: Analyzing trace with hash -1861027394, now seen corresponding path program 177 times [2021-07-13 19:30:53,067 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:30:53,067 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561189166] [2021-07-13 19:30:53,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:30:53,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:30:53,161 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:30:53,161 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:30:53,161 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561189166] [2021-07-13 19:30:53,161 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1561189166] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:30:53,161 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1650909843] [2021-07-13 19:30:53,162 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:30:53,195 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:30:53,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:30:53,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 19:30:53,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:30:53,284 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:30:53,284 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:30:53,285 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:30:53,285 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:30:53,287 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:30:53,288 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:30:53,288 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:30:53,289 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:30:53,293 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:30:53,294 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:30:53,294 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:30:53,295 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:30:53,297 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:30:53,297 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:30:53,298 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:30:53,332 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-07-13 19:30:53,332 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:30:53,333 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:30:53,333 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-07-13 19:30:53,393 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:30:53,393 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1650909843] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:30:53,393 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:30:53,393 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-13 19:30:53,393 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58785699] [2021-07-13 19:30:53,393 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:30:53,393 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:30:53,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:30:53,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:30:53,394 INFO L87 Difference]: Start difference. First operand 562 states and 1637 transitions. Second operand has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:30:53,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:30:53,755 INFO L93 Difference]: Finished difference Result 689 states and 1887 transitions. [2021-07-13 19:30:53,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-13 19:30:53,756 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:30:53,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:30:53,757 INFO L225 Difference]: With dead ends: 689 [2021-07-13 19:30:53,757 INFO L226 Difference]: Without dead ends: 685 [2021-07-13 19:30:53,757 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 393.7ms TimeCoverageRelationStatistics Valid=112, Invalid=758, Unknown=0, NotChecked=0, Total=870 [2021-07-13 19:30:53,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 685 states. [2021-07-13 19:30:53,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 685 to 571. [2021-07-13 19:30:53,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 571 states, 570 states have (on average 2.9192982456140353) internal successors, (1664), 570 states have internal predecessors, (1664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:30:53,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 571 states to 571 states and 1664 transitions. [2021-07-13 19:30:53,764 INFO L78 Accepts]: Start accepts. Automaton has 571 states and 1664 transitions. Word has length 17 [2021-07-13 19:30:53,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:30:53,764 INFO L482 AbstractCegarLoop]: Abstraction has 571 states and 1664 transitions. [2021-07-13 19:30:53,764 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:30:53,764 INFO L276 IsEmpty]: Start isEmpty. Operand 571 states and 1664 transitions. [2021-07-13 19:30:53,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:30:53,765 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:30:53,765 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:30:53,966 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1444,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:30:53,966 INFO L430 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:30:53,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:30:53,967 INFO L82 PathProgramCache]: Analyzing trace with hash -131980060, now seen corresponding path program 178 times [2021-07-13 19:30:53,967 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:30:53,967 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623605108] [2021-07-13 19:30:53,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:30:53,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:30:54,060 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:30:54,061 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:30:54,061 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623605108] [2021-07-13 19:30:54,061 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1623605108] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:30:54,061 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1290295985] [2021-07-13 19:30:54,061 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:30:54,090 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:30:54,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:30:54,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 19:30:54,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:30:54,243 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:30:54,244 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:30:54,244 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:30:54,245 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:30:54,247 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:30:54,248 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:30:54,250 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:30:54,251 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:30:54,253 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:30:54,253 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:30:54,256 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:30:54,256 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:30:54,256 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:30:54,257 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:30:54,259 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:30:54,260 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:30:54,287 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-07-13 19:30:54,287 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:30:54,288 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:30:54,288 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-07-13 19:30:54,313 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:30:54,313 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1290295985] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:30:54,313 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:30:54,313 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-13 19:30:54,313 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856686012] [2021-07-13 19:30:54,313 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:30:54,313 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:30:54,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:30:54,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:30:54,315 INFO L87 Difference]: Start difference. First operand 571 states and 1664 transitions. Second operand has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:30:54,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:30:54,648 INFO L93 Difference]: Finished difference Result 632 states and 1781 transitions. [2021-07-13 19:30:54,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 19:30:54,648 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:30:54,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:30:54,649 INFO L225 Difference]: With dead ends: 632 [2021-07-13 19:30:54,649 INFO L226 Difference]: Without dead ends: 624 [2021-07-13 19:30:54,649 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 337.1ms TimeCoverageRelationStatistics Valid=84, Invalid=516, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:30:54,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 624 states. [2021-07-13 19:30:54,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 624 to 571. [2021-07-13 19:30:54,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 571 states, 570 states have (on average 2.912280701754386) internal successors, (1660), 570 states have internal predecessors, (1660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:30:54,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 571 states to 571 states and 1660 transitions. [2021-07-13 19:30:54,656 INFO L78 Accepts]: Start accepts. Automaton has 571 states and 1660 transitions. Word has length 17 [2021-07-13 19:30:54,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:30:54,656 INFO L482 AbstractCegarLoop]: Abstraction has 571 states and 1660 transitions. [2021-07-13 19:30:54,656 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:30:54,656 INFO L276 IsEmpty]: Start isEmpty. Operand 571 states and 1660 transitions. [2021-07-13 19:30:54,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:30:54,657 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:30:54,657 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:30:54,858 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1450,183 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:30:54,858 INFO L430 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:30:54,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:30:54,858 INFO L82 PathProgramCache]: Analyzing trace with hash 1928879742, now seen corresponding path program 179 times [2021-07-13 19:30:54,858 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:30:54,859 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749013748] [2021-07-13 19:30:54,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:30:54,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:30:54,931 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:30:54,931 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:30:54,931 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749013748] [2021-07-13 19:30:54,931 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1749013748] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:30:54,931 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [759491970] [2021-07-13 19:30:54,932 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:30:54,959 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:30:54,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:30:54,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 19:30:54,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:30:55,101 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:30:55,101 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:30:55,102 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:30:55,102 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:30:55,105 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:30:55,105 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:30:55,108 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:30:55,108 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:30:55,111 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:30:55,111 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:30:55,114 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:30:55,114 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:30:55,114 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:30:55,115 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:30:55,117 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:30:55,118 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:30:55,148 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-07-13 19:30:55,148 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:30:55,149 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:30:55,149 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-07-13 19:30:55,176 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:30:55,176 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [759491970] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:30:55,176 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:30:55,176 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-13 19:30:55,176 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057453658] [2021-07-13 19:30:55,176 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:30:55,176 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:30:55,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:30:55,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:30:55,177 INFO L87 Difference]: Start difference. First operand 571 states and 1660 transitions. Second operand has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:30:55,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:30:55,498 INFO L93 Difference]: Finished difference Result 628 states and 1771 transitions. [2021-07-13 19:30:55,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 19:30:55,498 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:30:55,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:30:55,499 INFO L225 Difference]: With dead ends: 628 [2021-07-13 19:30:55,499 INFO L226 Difference]: Without dead ends: 616 [2021-07-13 19:30:55,499 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 325.4ms TimeCoverageRelationStatistics Valid=86, Invalid=564, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:30:55,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 616 states. [2021-07-13 19:30:55,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 616 to 573. [2021-07-13 19:30:55,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 573 states, 572 states have (on average 2.9003496503496504) internal successors, (1659), 572 states have internal predecessors, (1659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:30:55,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 573 states to 573 states and 1659 transitions. [2021-07-13 19:30:55,506 INFO L78 Accepts]: Start accepts. Automaton has 573 states and 1659 transitions. Word has length 17 [2021-07-13 19:30:55,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:30:55,506 INFO L482 AbstractCegarLoop]: Abstraction has 573 states and 1659 transitions. [2021-07-13 19:30:55,506 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:30:55,506 INFO L276 IsEmpty]: Start isEmpty. Operand 573 states and 1659 transitions. [2021-07-13 19:30:55,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:30:55,507 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:30:55,507 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:30:55,707 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 184 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1457 [2021-07-13 19:30:55,707 INFO L430 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:30:55,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:30:55,708 INFO L82 PathProgramCache]: Analyzing trace with hash 146360346, now seen corresponding path program 180 times [2021-07-13 19:30:55,708 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:30:55,708 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108166132] [2021-07-13 19:30:55,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:30:55,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:30:55,781 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:30:55,781 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:30:55,781 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108166132] [2021-07-13 19:30:55,781 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [108166132] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:30:55,781 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1010890072] [2021-07-13 19:30:55,782 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:30:55,808 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:30:55,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:30:55,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 19:30:55,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:30:55,917 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:30:55,917 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:30:55,918 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:30:55,918 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:30:55,920 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:30:55,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:30:55,921 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:30:55,950 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-07-13 19:30:55,950 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:30:55,951 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:30:55,951 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-07-13 19:30:55,971 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:30:55,971 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1010890072] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:30:55,971 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:30:55,971 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-13 19:30:55,971 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972311294] [2021-07-13 19:30:55,971 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:30:55,971 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:30:55,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:30:55,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:30:55,972 INFO L87 Difference]: Start difference. First operand 573 states and 1659 transitions. Second operand has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:30:56,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:30:56,207 INFO L93 Difference]: Finished difference Result 666 states and 1855 transitions. [2021-07-13 19:30:56,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 19:30:56,207 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:30:56,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:30:56,208 INFO L225 Difference]: With dead ends: 666 [2021-07-13 19:30:56,208 INFO L226 Difference]: Without dead ends: 666 [2021-07-13 19:30:56,208 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 179.9ms TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:30:56,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 666 states. [2021-07-13 19:30:56,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 666 to 573. [2021-07-13 19:30:56,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 573 states, 572 states have (on average 2.9003496503496504) internal successors, (1659), 572 states have internal predecessors, (1659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:30:56,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 573 states to 573 states and 1659 transitions. [2021-07-13 19:30:56,215 INFO L78 Accepts]: Start accepts. Automaton has 573 states and 1659 transitions. Word has length 17 [2021-07-13 19:30:56,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:30:56,215 INFO L482 AbstractCegarLoop]: Abstraction has 573 states and 1659 transitions. [2021-07-13 19:30:56,215 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:30:56,215 INFO L276 IsEmpty]: Start isEmpty. Operand 573 states and 1659 transitions. [2021-07-13 19:30:56,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:30:56,216 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:30:56,216 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:30:56,428 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1464 [2021-07-13 19:30:56,429 INFO L430 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:30:56,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:30:56,429 INFO L82 PathProgramCache]: Analyzing trace with hash -267672872, now seen corresponding path program 181 times [2021-07-13 19:30:56,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:30:56,429 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335033362] [2021-07-13 19:30:56,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:30:56,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:30:56,519 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:30:56,519 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:30:56,519 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335033362] [2021-07-13 19:30:56,519 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [335033362] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:30:56,519 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1666422991] [2021-07-13 19:30:56,519 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:30:56,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:30:56,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 19:30:56,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:30:56,639 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:30:56,640 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:30:56,640 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:30:56,641 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:30:56,643 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:30:56,643 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:30:56,643 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:30:56,644 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:30:56,646 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:30:56,646 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:30:56,647 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:30:56,647 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:30:56,649 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:30:56,650 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:30:56,650 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:30:56,682 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-07-13 19:30:56,682 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:30:56,682 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:30:56,683 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-07-13 19:30:56,731 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:30:56,731 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1666422991] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:30:56,731 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:30:56,731 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-13 19:30:56,731 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431713755] [2021-07-13 19:30:56,731 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:30:56,731 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:30:56,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:30:56,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:30:56,731 INFO L87 Difference]: Start difference. First operand 573 states and 1659 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:30:56,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:30:56,970 INFO L93 Difference]: Finished difference Result 686 states and 1874 transitions. [2021-07-13 19:30:56,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 19:30:56,970 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:30:56,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:30:56,971 INFO L225 Difference]: With dead ends: 686 [2021-07-13 19:30:56,971 INFO L226 Difference]: Without dead ends: 686 [2021-07-13 19:30:56,971 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 233.7ms TimeCoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:30:56,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 686 states. [2021-07-13 19:30:56,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 686 to 583. [2021-07-13 19:30:56,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 583 states, 582 states have (on average 2.90893470790378) internal successors, (1693), 582 states have internal predecessors, (1693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:30:56,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 583 states to 583 states and 1693 transitions. [2021-07-13 19:30:56,978 INFO L78 Accepts]: Start accepts. Automaton has 583 states and 1693 transitions. Word has length 17 [2021-07-13 19:30:56,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:30:56,978 INFO L482 AbstractCegarLoop]: Abstraction has 583 states and 1693 transitions. [2021-07-13 19:30:56,978 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:30:56,978 INFO L276 IsEmpty]: Start isEmpty. Operand 583 states and 1693 transitions. [2021-07-13 19:30:56,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:30:56,979 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:30:56,979 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:30:57,179 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1467,186 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:30:57,180 INFO L430 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:30:57,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:30:57,180 INFO L82 PathProgramCache]: Analyzing trace with hash 533943356, now seen corresponding path program 182 times [2021-07-13 19:30:57,180 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:30:57,180 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356214660] [2021-07-13 19:30:57,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:30:57,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:30:57,273 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:30:57,273 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:30:57,273 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356214660] [2021-07-13 19:30:57,274 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [356214660] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:30:57,274 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1634679213] [2021-07-13 19:30:57,274 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:30:57,299 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:30:57,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:30:57,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 19:30:57,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:30:57,417 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:30:57,417 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:30:57,417 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:30:57,418 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:30:57,420 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:30:57,421 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:30:57,421 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:30:57,422 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:30:57,424 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:30:57,424 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:30:57,424 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:30:57,425 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:30:57,427 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:30:57,427 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:30:57,428 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:30:57,460 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-07-13 19:30:57,460 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:30:57,461 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:30:57,461 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-07-13 19:30:57,528 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:30:57,528 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1634679213] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:30:57,528 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:30:57,528 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-13 19:30:57,528 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883141552] [2021-07-13 19:30:57,528 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:30:57,528 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:30:57,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:30:57,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:30:57,529 INFO L87 Difference]: Start difference. First operand 583 states and 1693 transitions. Second operand has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:30:58,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:30:58,252 INFO L93 Difference]: Finished difference Result 703 states and 1905 transitions. [2021-07-13 19:30:58,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-13 19:30:58,253 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:30:58,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:30:58,254 INFO L225 Difference]: With dead ends: 703 [2021-07-13 19:30:58,254 INFO L226 Difference]: Without dead ends: 694 [2021-07-13 19:30:58,254 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 700.5ms TimeCoverageRelationStatistics Valid=154, Invalid=1106, Unknown=0, NotChecked=0, Total=1260 [2021-07-13 19:30:58,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 694 states. [2021-07-13 19:30:58,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 694 to 588. [2021-07-13 19:30:58,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 588 states, 587 states have (on average 2.909710391822828) internal successors, (1708), 587 states have internal predecessors, (1708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:30:58,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 588 states to 588 states and 1708 transitions. [2021-07-13 19:30:58,261 INFO L78 Accepts]: Start accepts. Automaton has 588 states and 1708 transitions. Word has length 17 [2021-07-13 19:30:58,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:30:58,261 INFO L482 AbstractCegarLoop]: Abstraction has 588 states and 1708 transitions. [2021-07-13 19:30:58,261 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:30:58,261 INFO L276 IsEmpty]: Start isEmpty. Operand 588 states and 1708 transitions. [2021-07-13 19:30:58,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:30:58,262 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:30:58,262 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:30:58,468 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1471,187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:30:58,469 INFO L430 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:30:58,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:30:58,469 INFO L82 PathProgramCache]: Analyzing trace with hash -2042680234, now seen corresponding path program 183 times [2021-07-13 19:30:58,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:30:58,469 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746664669] [2021-07-13 19:30:58,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:30:58,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:30:58,560 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:30:58,560 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:30:58,560 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746664669] [2021-07-13 19:30:58,560 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1746664669] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:30:58,560 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1198333330] [2021-07-13 19:30:58,560 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:30:58,588 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 19:30:58,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:30:58,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 19:30:58,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:30:58,700 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:30:58,700 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:30:58,701 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:30:58,702 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:30:58,704 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:30:58,716 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:30:58,717 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:30:58,718 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:30:58,720 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:30:58,721 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:30:58,721 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:30:58,722 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:30:58,724 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:30:58,724 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:30:58,725 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:30:58,763 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-07-13 19:30:58,763 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:30:58,764 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:30:58,764 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-07-13 19:30:58,811 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:30:58,811 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1198333330] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:30:58,811 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:30:58,811 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-13 19:30:58,811 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410411081] [2021-07-13 19:30:58,811 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:30:58,811 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:30:58,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:30:58,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:30:58,811 INFO L87 Difference]: Start difference. First operand 588 states and 1708 transitions. Second operand has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:30:59,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:30:59,295 INFO L93 Difference]: Finished difference Result 681 states and 1874 transitions. [2021-07-13 19:30:59,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 19:30:59,295 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:30:59,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:30:59,296 INFO L225 Difference]: With dead ends: 681 [2021-07-13 19:30:59,296 INFO L226 Difference]: Without dead ends: 681 [2021-07-13 19:30:59,296 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 428.8ms TimeCoverageRelationStatistics Valid=109, Invalid=647, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:30:59,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 681 states. [2021-07-13 19:30:59,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 681 to 577. [2021-07-13 19:30:59,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 577 states, 576 states have (on average 2.8958333333333335) internal successors, (1668), 576 states have internal predecessors, (1668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:30:59,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 577 states to 577 states and 1668 transitions. [2021-07-13 19:30:59,303 INFO L78 Accepts]: Start accepts. Automaton has 577 states and 1668 transitions. Word has length 17 [2021-07-13 19:30:59,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:30:59,303 INFO L482 AbstractCegarLoop]: Abstraction has 577 states and 1668 transitions. [2021-07-13 19:30:59,303 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:30:59,303 INFO L276 IsEmpty]: Start isEmpty. Operand 577 states and 1668 transitions. [2021-07-13 19:30:59,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:30:59,304 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:30:59,304 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:30:59,504 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 188 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1476 [2021-07-13 19:30:59,504 INFO L430 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:30:59,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:30:59,505 INFO L82 PathProgramCache]: Analyzing trace with hash 541673754, now seen corresponding path program 184 times [2021-07-13 19:30:59,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:30:59,505 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577241800] [2021-07-13 19:30:59,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:30:59,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:30:59,592 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:30:59,592 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:30:59,592 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577241800] [2021-07-13 19:30:59,592 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [577241800] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:30:59,592 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [548607237] [2021-07-13 19:30:59,592 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:30:59,620 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:30:59,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:30:59,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 19:30:59,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:30:59,747 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:30:59,748 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:30:59,748 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:30:59,749 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:30:59,751 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:30:59,751 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:30:59,752 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:30:59,772 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-07-13 19:30:59,773 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:30:59,773 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:30:59,773 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-07-13 19:30:59,792 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:30:59,793 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [548607237] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:30:59,793 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:30:59,793 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-13 19:30:59,793 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030267648] [2021-07-13 19:30:59,793 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:30:59,793 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:30:59,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:30:59,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:30:59,793 INFO L87 Difference]: Start difference. First operand 577 states and 1668 transitions. Second operand has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:31:00,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:31:00,312 INFO L93 Difference]: Finished difference Result 727 states and 1960 transitions. [2021-07-13 19:31:00,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-13 19:31:00,312 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:31:00,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:31:00,313 INFO L225 Difference]: With dead ends: 727 [2021-07-13 19:31:00,313 INFO L226 Difference]: Without dead ends: 727 [2021-07-13 19:31:00,313 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 472.9ms TimeCoverageRelationStatistics Valid=146, Invalid=910, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 19:31:00,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 727 states. [2021-07-13 19:31:00,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 727 to 575. [2021-07-13 19:31:00,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 575 states, 574 states have (on average 2.897212543554007) internal successors, (1663), 574 states have internal predecessors, (1663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:31:00,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 575 states to 575 states and 1663 transitions. [2021-07-13 19:31:00,320 INFO L78 Accepts]: Start accepts. Automaton has 575 states and 1663 transitions. Word has length 17 [2021-07-13 19:31:00,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:31:00,320 INFO L482 AbstractCegarLoop]: Abstraction has 575 states and 1663 transitions. [2021-07-13 19:31:00,320 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:31:00,320 INFO L276 IsEmpty]: Start isEmpty. Operand 575 states and 1663 transitions. [2021-07-13 19:31:00,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:31:00,321 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:31:00,321 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:31:00,521 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1480,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:31:00,522 INFO L430 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:31:00,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:31:00,522 INFO L82 PathProgramCache]: Analyzing trace with hash -947731242, now seen corresponding path program 185 times [2021-07-13 19:31:00,522 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:31:00,522 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221868568] [2021-07-13 19:31:00,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:31:00,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:31:00,599 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:31:00,599 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:31:00,599 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221868568] [2021-07-13 19:31:00,599 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1221868568] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:31:00,600 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1005016957] [2021-07-13 19:31:00,600 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:31:00,633 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:31:00,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:31:00,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 19:31:00,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:31:00,751 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:31:00,752 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:31:00,752 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:31:00,753 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:31:00,755 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:31:00,755 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:31:00,756 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:31:00,777 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-07-13 19:31:00,777 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:31:00,778 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:31:00,778 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-07-13 19:31:00,798 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:31:00,798 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1005016957] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:31:00,798 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:31:00,798 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-13 19:31:00,798 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494418662] [2021-07-13 19:31:00,798 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:31:00,798 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:31:00,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:31:00,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:31:00,799 INFO L87 Difference]: Start difference. First operand 575 states and 1663 transitions. Second operand has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:31:01,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:31:01,264 INFO L93 Difference]: Finished difference Result 672 states and 1874 transitions. [2021-07-13 19:31:01,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 19:31:01,264 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:31:01,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:31:01,265 INFO L225 Difference]: With dead ends: 672 [2021-07-13 19:31:01,265 INFO L226 Difference]: Without dead ends: 672 [2021-07-13 19:31:01,266 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 432.3ms TimeCoverageRelationStatistics Valid=125, Invalid=687, Unknown=0, NotChecked=0, Total=812 [2021-07-13 19:31:01,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 672 states. [2021-07-13 19:31:01,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 672 to 574. [2021-07-13 19:31:01,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 574 states, 573 states have (on average 2.898778359511344) internal successors, (1661), 573 states have internal predecessors, (1661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:31:01,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 574 states to 574 states and 1661 transitions. [2021-07-13 19:31:01,272 INFO L78 Accepts]: Start accepts. Automaton has 574 states and 1661 transitions. Word has length 17 [2021-07-13 19:31:01,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:31:01,272 INFO L482 AbstractCegarLoop]: Abstraction has 574 states and 1661 transitions. [2021-07-13 19:31:01,272 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:31:01,272 INFO L276 IsEmpty]: Start isEmpty. Operand 574 states and 1661 transitions. [2021-07-13 19:31:01,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:31:01,273 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:31:01,273 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:31:01,473 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1483,190 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:31:01,473 INFO L430 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:31:01,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:31:01,474 INFO L82 PathProgramCache]: Analyzing trace with hash 125354138, now seen corresponding path program 186 times [2021-07-13 19:31:01,474 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:31:01,474 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901259179] [2021-07-13 19:31:01,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:31:01,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:31:01,558 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:31:01,559 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:31:01,559 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901259179] [2021-07-13 19:31:01,559 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1901259179] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:31:01,559 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [659614345] [2021-07-13 19:31:01,559 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:31:01,586 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:31:01,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:31:01,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 19:31:01,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:31:01,705 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:31:01,705 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:31:01,705 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:31:01,706 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:31:01,708 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:31:01,708 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:31:01,709 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:31:01,730 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-07-13 19:31:01,731 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:31:01,731 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:31:01,731 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-07-13 19:31:01,752 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:31:01,752 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [659614345] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:31:01,752 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:31:01,752 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-13 19:31:01,752 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8723781] [2021-07-13 19:31:01,752 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:31:01,752 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:31:01,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:31:01,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:31:01,752 INFO L87 Difference]: Start difference. First operand 574 states and 1661 transitions. Second operand has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:31:01,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:31:01,919 INFO L93 Difference]: Finished difference Result 642 states and 1808 transitions. [2021-07-13 19:31:01,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:31:01,920 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:31:01,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:31:01,920 INFO L225 Difference]: With dead ends: 642 [2021-07-13 19:31:01,921 INFO L226 Difference]: Without dead ends: 642 [2021-07-13 19:31:01,921 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 168.6ms TimeCoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:31:01,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 642 states. [2021-07-13 19:31:01,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 642 to 577. [2021-07-13 19:31:01,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 577 states, 576 states have (on average 2.8975694444444446) internal successors, (1669), 576 states have internal predecessors, (1669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:31:01,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 577 states to 577 states and 1669 transitions. [2021-07-13 19:31:01,927 INFO L78 Accepts]: Start accepts. Automaton has 577 states and 1669 transitions. Word has length 17 [2021-07-13 19:31:01,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:31:01,927 INFO L482 AbstractCegarLoop]: Abstraction has 577 states and 1669 transitions. [2021-07-13 19:31:01,927 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:31:01,927 INFO L276 IsEmpty]: Start isEmpty. Operand 577 states and 1669 transitions. [2021-07-13 19:31:01,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:31:01,928 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:31:01,928 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:31:02,128 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 191 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1486 [2021-07-13 19:31:02,129 INFO L430 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:31:02,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:31:02,129 INFO L82 PathProgramCache]: Analyzing trace with hash 150986938, now seen corresponding path program 187 times [2021-07-13 19:31:02,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:31:02,129 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128668991] [2021-07-13 19:31:02,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:31:02,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:31:02,211 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:31:02,211 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:31:02,211 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128668991] [2021-07-13 19:31:02,211 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1128668991] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:31:02,211 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [388543338] [2021-07-13 19:31:02,211 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:31:02,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:31:02,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 19:31:02,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:31:02,348 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:31:02,349 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:31:02,349 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:31:02,350 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:31:02,351 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:31:02,352 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:31:02,352 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:31:02,369 INFO L628 ElimStorePlain]: treesize reduction 30, result has 33.3 percent of original size [2021-07-13 19:31:02,370 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:31:02,370 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:31:02,370 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:59, output treesize:15 [2021-07-13 19:31:02,392 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:31:02,392 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [388543338] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:31:02,392 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:31:02,392 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 19:31:02,392 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652414399] [2021-07-13 19:31:02,392 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:31:02,392 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:31:02,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:31:02,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:31:02,393 INFO L87 Difference]: Start difference. First operand 577 states and 1669 transitions. Second operand has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:31:02,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:31:02,728 INFO L93 Difference]: Finished difference Result 720 states and 1941 transitions. [2021-07-13 19:31:02,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 19:31:02,728 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:31:02,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:31:02,730 INFO L225 Difference]: With dead ends: 720 [2021-07-13 19:31:02,730 INFO L226 Difference]: Without dead ends: 720 [2021-07-13 19:31:02,730 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 226.9ms TimeCoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:31:02,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 720 states. [2021-07-13 19:31:02,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 720 to 599. [2021-07-13 19:31:02,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 599 states, 598 states have (on average 2.9180602006688963) internal successors, (1745), 598 states have internal predecessors, (1745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:31:02,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 599 states to 599 states and 1745 transitions. [2021-07-13 19:31:02,737 INFO L78 Accepts]: Start accepts. Automaton has 599 states and 1745 transitions. Word has length 17 [2021-07-13 19:31:02,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:31:02,737 INFO L482 AbstractCegarLoop]: Abstraction has 599 states and 1745 transitions. [2021-07-13 19:31:02,737 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:31:02,737 INFO L276 IsEmpty]: Start isEmpty. Operand 599 states and 1745 transitions. [2021-07-13 19:31:02,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:31:02,738 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:31:02,738 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:31:02,939 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1489,192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:31:02,939 INFO L430 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:31:02,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:31:02,939 INFO L82 PathProgramCache]: Analyzing trace with hash 1705036062, now seen corresponding path program 188 times [2021-07-13 19:31:02,939 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:31:02,939 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243045233] [2021-07-13 19:31:02,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:31:02,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:31:03,017 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:31:03,017 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:31:03,017 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243045233] [2021-07-13 19:31:03,017 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [243045233] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:31:03,017 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [940892539] [2021-07-13 19:31:03,017 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:31:03,049 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:31:03,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:31:03,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 19:31:03,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:31:03,167 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:31:03,168 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:31:03,170 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:31:03,171 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:31:03,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:31:03,171 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:31:03,173 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:31:03,174 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:31:03,176 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:31:03,177 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:31:03,177 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:31:03,178 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:31:03,180 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:31:03,180 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:31:03,182 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:31:03,182 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:31:03,209 INFO L628 ElimStorePlain]: treesize reduction 21, result has 58.0 percent of original size [2021-07-13 19:31:03,210 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:31:03,210 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:31:03,210 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 2 variables, input treesize:125, output treesize:29 [2021-07-13 19:31:03,241 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:31:03,242 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [940892539] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:31:03,242 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:31:03,242 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 19:31:03,242 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304411936] [2021-07-13 19:31:03,242 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:31:03,242 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:31:03,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:31:03,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:31:03,242 INFO L87 Difference]: Start difference. First operand 599 states and 1745 transitions. Second operand has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:31:03,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:31:03,719 INFO L93 Difference]: Finished difference Result 680 states and 1861 transitions. [2021-07-13 19:31:03,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-13 19:31:03,719 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:31:03,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:31:03,720 INFO L225 Difference]: With dead ends: 680 [2021-07-13 19:31:03,720 INFO L226 Difference]: Without dead ends: 674 [2021-07-13 19:31:03,720 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 402.6ms TimeCoverageRelationStatistics Valid=115, Invalid=877, Unknown=0, NotChecked=0, Total=992 [2021-07-13 19:31:03,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 674 states. [2021-07-13 19:31:03,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 674 to 603. [2021-07-13 19:31:03,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 603 states, 602 states have (on average 2.903654485049834) internal successors, (1748), 602 states have internal predecessors, (1748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:31:03,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 603 states to 603 states and 1748 transitions. [2021-07-13 19:31:03,727 INFO L78 Accepts]: Start accepts. Automaton has 603 states and 1748 transitions. Word has length 17 [2021-07-13 19:31:03,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:31:03,727 INFO L482 AbstractCegarLoop]: Abstraction has 603 states and 1748 transitions. [2021-07-13 19:31:03,727 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:31:03,728 INFO L276 IsEmpty]: Start isEmpty. Operand 603 states and 1748 transitions. [2021-07-13 19:31:03,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:31:03,728 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:31:03,728 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:31:03,941 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1491,193 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:31:03,941 INFO L430 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:31:03,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:31:03,941 INFO L82 PathProgramCache]: Analyzing trace with hash 390629276, now seen corresponding path program 189 times [2021-07-13 19:31:03,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:31:03,941 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961158792] [2021-07-13 19:31:03,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:31:03,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:31:04,025 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:31:04,025 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:31:04,025 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961158792] [2021-07-13 19:31:04,025 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [961158792] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:31:04,025 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1954760124] [2021-07-13 19:31:04,025 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:31:04,054 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 19:31:04,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:31:04,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 19:31:04,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:31:04,169 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:31:04,169 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:31:04,170 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:31:04,170 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:31:04,172 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:31:04,173 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:31:04,173 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:31:04,190 INFO L628 ElimStorePlain]: treesize reduction 30, result has 33.3 percent of original size [2021-07-13 19:31:04,190 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:31:04,191 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:31:04,191 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:59, output treesize:15 [2021-07-13 19:31:04,212 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:31:04,212 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1954760124] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:31:04,213 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:31:04,213 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 19:31:04,213 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193616988] [2021-07-13 19:31:04,213 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:31:04,213 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:31:04,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:31:04,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:31:04,213 INFO L87 Difference]: Start difference. First operand 603 states and 1748 transitions. Second operand has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:31:04,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:31:04,906 INFO L93 Difference]: Finished difference Result 783 states and 2089 transitions. [2021-07-13 19:31:04,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-13 19:31:04,906 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:31:04,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:31:04,907 INFO L225 Difference]: With dead ends: 783 [2021-07-13 19:31:04,907 INFO L226 Difference]: Without dead ends: 779 [2021-07-13 19:31:04,908 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 370 ImplicationChecksByTransitivity, 617.5ms TimeCoverageRelationStatistics Valid=188, Invalid=1372, Unknown=0, NotChecked=0, Total=1560 [2021-07-13 19:31:04,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 779 states. [2021-07-13 19:31:04,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 779 to 614. [2021-07-13 19:31:04,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 614 states, 613 states have (on average 2.9200652528548123) internal successors, (1790), 613 states have internal predecessors, (1790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:31:04,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 614 states to 614 states and 1790 transitions. [2021-07-13 19:31:04,915 INFO L78 Accepts]: Start accepts. Automaton has 614 states and 1790 transitions. Word has length 17 [2021-07-13 19:31:04,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:31:04,915 INFO L482 AbstractCegarLoop]: Abstraction has 614 states and 1790 transitions. [2021-07-13 19:31:04,915 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:31:04,916 INFO L276 IsEmpty]: Start isEmpty. Operand 614 states and 1790 transitions. [2021-07-13 19:31:04,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:31:04,916 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:31:04,916 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:31:05,117 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 194 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1496 [2021-07-13 19:31:05,117 INFO L430 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:31:05,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:31:05,117 INFO L82 PathProgramCache]: Analyzing trace with hash -529071432, now seen corresponding path program 190 times [2021-07-13 19:31:05,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:31:05,117 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304836162] [2021-07-13 19:31:05,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:31:05,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:31:05,195 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:31:05,195 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:31:05,195 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304836162] [2021-07-13 19:31:05,195 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1304836162] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:31:05,195 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1023905663] [2021-07-13 19:31:05,196 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:31:05,222 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:31:05,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:31:05,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 19:31:05,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:31:05,348 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:31:05,349 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:31:05,351 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:31:05,352 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:31:05,352 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:31:05,353 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:31:05,355 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:31:05,355 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:31:05,358 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:31:05,358 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:31:05,358 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:31:05,359 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:31:05,361 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:31:05,361 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:31:05,363 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:31:05,363 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:31:05,390 INFO L628 ElimStorePlain]: treesize reduction 21, result has 58.0 percent of original size [2021-07-13 19:31:05,390 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:31:05,391 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:31:05,391 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 2 variables, input treesize:125, output treesize:29 [2021-07-13 19:31:05,423 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:31:05,424 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1023905663] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:31:05,424 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:31:05,424 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 19:31:05,424 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466488154] [2021-07-13 19:31:05,424 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:31:05,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:31:05,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:31:05,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:31:05,424 INFO L87 Difference]: Start difference. First operand 614 states and 1790 transitions. Second operand has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:31:06,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:31:06,062 INFO L93 Difference]: Finished difference Result 695 states and 1916 transitions. [2021-07-13 19:31:06,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-13 19:31:06,063 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:31:06,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:31:06,064 INFO L225 Difference]: With dead ends: 695 [2021-07-13 19:31:06,064 INFO L226 Difference]: Without dead ends: 689 [2021-07-13 19:31:06,064 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 572.5ms TimeCoverageRelationStatistics Valid=155, Invalid=1105, Unknown=0, NotChecked=0, Total=1260 [2021-07-13 19:31:06,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 689 states. [2021-07-13 19:31:06,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 689 to 617. [2021-07-13 19:31:06,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 617 states, 616 states have (on average 2.905844155844156) internal successors, (1790), 616 states have internal predecessors, (1790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:31:06,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 617 states to 617 states and 1790 transitions. [2021-07-13 19:31:06,071 INFO L78 Accepts]: Start accepts. Automaton has 617 states and 1790 transitions. Word has length 17 [2021-07-13 19:31:06,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:31:06,071 INFO L482 AbstractCegarLoop]: Abstraction has 617 states and 1790 transitions. [2021-07-13 19:31:06,071 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:31:06,071 INFO L276 IsEmpty]: Start isEmpty. Operand 617 states and 1790 transitions. [2021-07-13 19:31:06,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:31:06,072 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:31:06,072 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:31:06,272 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1498 [2021-07-13 19:31:06,273 INFO L430 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:31:06,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:31:06,273 INFO L82 PathProgramCache]: Analyzing trace with hash 398359674, now seen corresponding path program 191 times [2021-07-13 19:31:06,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:31:06,273 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32646777] [2021-07-13 19:31:06,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:31:06,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:31:06,358 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:31:06,358 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:31:06,358 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32646777] [2021-07-13 19:31:06,358 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [32646777] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:31:06,358 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1289086494] [2021-07-13 19:31:06,358 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:31:06,387 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-13 19:31:06,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:31:06,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 19:31:06,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:31:06,485 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:31:06,486 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:31:06,486 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:31:06,487 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:31:06,489 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:31:06,489 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:31:06,489 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:31:06,490 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:31:06,492 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:31:06,492 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:31:06,493 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:31:06,493 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:31:06,495 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:31:06,496 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:31:06,496 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:31:06,528 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-07-13 19:31:06,528 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:31:06,529 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:31:06,529 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-07-13 19:31:06,578 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:31:06,579 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1289086494] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:31:06,579 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:31:06,579 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 19:31:06,579 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085122995] [2021-07-13 19:31:06,579 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:31:06,579 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:31:06,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:31:06,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:31:06,579 INFO L87 Difference]: Start difference. First operand 617 states and 1790 transitions. Second operand has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:31:07,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:31:07,193 INFO L93 Difference]: Finished difference Result 816 states and 2117 transitions. [2021-07-13 19:31:07,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-13 19:31:07,193 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:31:07,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:31:07,194 INFO L225 Difference]: With dead ends: 816 [2021-07-13 19:31:07,194 INFO L226 Difference]: Without dead ends: 813 [2021-07-13 19:31:07,195 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 540.5ms TimeCoverageRelationStatistics Valid=163, Invalid=1027, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 19:31:07,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 813 states. [2021-07-13 19:31:07,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 813 to 607. [2021-07-13 19:31:07,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 607 states, 606 states have (on average 2.892739273927393) internal successors, (1753), 606 states have internal predecessors, (1753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:31:07,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 607 states to 607 states and 1753 transitions. [2021-07-13 19:31:07,203 INFO L78 Accepts]: Start accepts. Automaton has 607 states and 1753 transitions. Word has length 17 [2021-07-13 19:31:07,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:31:07,203 INFO L482 AbstractCegarLoop]: Abstraction has 607 states and 1753 transitions. [2021-07-13 19:31:07,203 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:31:07,203 INFO L276 IsEmpty]: Start isEmpty. Operand 607 states and 1753 transitions. [2021-07-13 19:31:07,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:31:07,204 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:31:07,204 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:31:07,409 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1503,196 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:31:07,409 INFO L430 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:31:07,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:31:07,409 INFO L82 PathProgramCache]: Analyzing trace with hash 1199975902, now seen corresponding path program 192 times [2021-07-13 19:31:07,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:31:07,409 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151047761] [2021-07-13 19:31:07,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:31:07,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:31:07,493 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:31:07,493 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:31:07,493 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151047761] [2021-07-13 19:31:07,493 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1151047761] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:31:07,493 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1063968787] [2021-07-13 19:31:07,493 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:31:07,522 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:31:07,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:31:07,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 19:31:07,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:31:07,620 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:31:07,621 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:31:07,621 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:31:07,622 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:31:07,624 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:31:07,624 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:31:07,625 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:31:07,625 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:31:07,627 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:31:07,628 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:31:07,628 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:31:07,629 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:31:07,631 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:31:07,631 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:31:07,632 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:31:07,663 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-07-13 19:31:07,663 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:31:07,664 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:31:07,664 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-07-13 19:31:07,732 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:31:07,732 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1063968787] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:31:07,732 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:31:07,732 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 19:31:07,732 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224754488] [2021-07-13 19:31:07,733 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:31:07,733 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:31:07,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:31:07,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:31:07,733 INFO L87 Difference]: Start difference. First operand 607 states and 1753 transitions. Second operand has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:31:08,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:31:08,468 INFO L93 Difference]: Finished difference Result 758 states and 2004 transitions. [2021-07-13 19:31:08,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-07-13 19:31:08,469 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:31:08,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:31:08,470 INFO L225 Difference]: With dead ends: 758 [2021-07-13 19:31:08,470 INFO L226 Difference]: Without dead ends: 753 [2021-07-13 19:31:08,470 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 374 ImplicationChecksByTransitivity, 689.4ms TimeCoverageRelationStatistics Valid=199, Invalid=1361, Unknown=0, NotChecked=0, Total=1560 [2021-07-13 19:31:08,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 753 states. [2021-07-13 19:31:08,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 753 to 615. [2021-07-13 19:31:08,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 615 states, 614 states have (on average 2.8892508143322475) internal successors, (1774), 614 states have internal predecessors, (1774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:31:08,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 615 states to 615 states and 1774 transitions. [2021-07-13 19:31:08,478 INFO L78 Accepts]: Start accepts. Automaton has 615 states and 1774 transitions. Word has length 17 [2021-07-13 19:31:08,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:31:08,478 INFO L482 AbstractCegarLoop]: Abstraction has 615 states and 1774 transitions. [2021-07-13 19:31:08,478 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:31:08,478 INFO L276 IsEmpty]: Start isEmpty. Operand 615 states and 1774 transitions. [2021-07-13 19:31:08,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:31:08,479 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:31:08,479 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:31:08,679 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1507 [2021-07-13 19:31:08,679 INFO L430 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:31:08,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:31:08,679 INFO L82 PathProgramCache]: Analyzing trace with hash -1376647688, now seen corresponding path program 193 times [2021-07-13 19:31:08,680 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:31:08,680 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142853045] [2021-07-13 19:31:08,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:31:08,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:31:08,774 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:31:08,774 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:31:08,774 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142853045] [2021-07-13 19:31:08,774 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1142853045] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:31:08,774 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1147071006] [2021-07-13 19:31:08,774 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:31:08,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:31:08,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 19:31:08,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:31:08,905 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:31:08,906 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:31:08,906 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:31:08,907 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:31:08,909 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:31:08,909 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:31:08,909 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:31:08,910 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:31:08,912 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:31:08,913 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:31:08,913 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:31:08,913 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:31:08,915 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:31:08,916 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:31:08,916 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:31:08,948 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-07-13 19:31:08,948 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:31:08,949 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:31:08,949 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-07-13 19:31:08,998 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:31:08,998 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1147071006] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:31:08,999 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:31:08,999 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 19:31:08,999 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502445965] [2021-07-13 19:31:08,999 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:31:08,999 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:31:08,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:31:08,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:31:08,999 INFO L87 Difference]: Start difference. First operand 615 states and 1774 transitions. Second operand has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:31:09,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:31:09,503 INFO L93 Difference]: Finished difference Result 734 states and 1964 transitions. [2021-07-13 19:31:09,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-13 19:31:09,503 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:31:09,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:31:09,504 INFO L225 Difference]: With dead ends: 734 [2021-07-13 19:31:09,504 INFO L226 Difference]: Without dead ends: 734 [2021-07-13 19:31:09,504 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 461.4ms TimeCoverageRelationStatistics Valid=149, Invalid=843, Unknown=0, NotChecked=0, Total=992 [2021-07-13 19:31:09,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 734 states. [2021-07-13 19:31:09,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 734 to 588. [2021-07-13 19:31:09,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 588 states, 587 states have (on average 2.8705281090289607) internal successors, (1685), 587 states have internal predecessors, (1685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:31:09,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 588 states to 588 states and 1685 transitions. [2021-07-13 19:31:09,511 INFO L78 Accepts]: Start accepts. Automaton has 588 states and 1685 transitions. Word has length 17 [2021-07-13 19:31:09,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:31:09,511 INFO L482 AbstractCegarLoop]: Abstraction has 588 states and 1685 transitions. [2021-07-13 19:31:09,511 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:31:09,511 INFO L276 IsEmpty]: Start isEmpty. Operand 588 states and 1685 transitions. [2021-07-13 19:31:09,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:31:09,512 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:31:09,512 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:31:09,712 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 198 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1512 [2021-07-13 19:31:09,713 INFO L430 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:31:09,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:31:09,713 INFO L82 PathProgramCache]: Analyzing trace with hash -1216001056, now seen corresponding path program 194 times [2021-07-13 19:31:09,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:31:09,713 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894267795] [2021-07-13 19:31:09,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:31:09,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:31:09,782 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:31:09,782 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:31:09,783 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894267795] [2021-07-13 19:31:09,783 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1894267795] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:31:09,783 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [671872982] [2021-07-13 19:31:09,783 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:31:09,809 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:31:09,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:31:09,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 19:31:09,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:31:09,900 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:31:09,901 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:31:09,901 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:31:09,902 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:31:09,907 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:31:09,907 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:31:09,907 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:31:09,908 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:31:09,910 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:31:09,910 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:31:09,911 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:31:09,911 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:31:09,913 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:31:09,913 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:31:09,914 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:31:09,946 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-07-13 19:31:09,946 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:31:09,947 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:31:09,947 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-07-13 19:31:10,012 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:31:10,013 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [671872982] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:31:10,013 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:31:10,013 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-07-13 19:31:10,013 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975019538] [2021-07-13 19:31:10,013 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:31:10,013 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:31:10,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:31:10,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:31:10,013 INFO L87 Difference]: Start difference. First operand 588 states and 1685 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:31:10,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:31:10,660 INFO L93 Difference]: Finished difference Result 661 states and 1794 transitions. [2021-07-13 19:31:10,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-13 19:31:10,660 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:31:10,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:31:10,661 INFO L225 Difference]: With dead ends: 661 [2021-07-13 19:31:10,661 INFO L226 Difference]: Without dead ends: 657 [2021-07-13 19:31:10,661 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 364 ImplicationChecksByTransitivity, 579.6ms TimeCoverageRelationStatistics Valid=181, Invalid=1301, Unknown=0, NotChecked=0, Total=1482 [2021-07-13 19:31:10,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 657 states. [2021-07-13 19:31:10,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 657 to 586. [2021-07-13 19:31:10,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 586 states, 585 states have (on average 2.864957264957265) internal successors, (1676), 585 states have internal predecessors, (1676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:31:10,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 586 states to 586 states and 1676 transitions. [2021-07-13 19:31:10,667 INFO L78 Accepts]: Start accepts. Automaton has 586 states and 1676 transitions. Word has length 17 [2021-07-13 19:31:10,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:31:10,668 INFO L482 AbstractCegarLoop]: Abstraction has 586 states and 1676 transitions. [2021-07-13 19:31:10,668 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:31:10,668 INFO L276 IsEmpty]: Start isEmpty. Operand 586 states and 1676 transitions. [2021-07-13 19:31:10,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:31:10,668 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:31:10,668 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:31:10,869 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1516,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:31:10,869 INFO L430 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:31:10,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:31:10,869 INFO L82 PathProgramCache]: Analyzing trace with hash -17959942, now seen corresponding path program 195 times [2021-07-13 19:31:10,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:31:10,869 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850012326] [2021-07-13 19:31:10,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:31:10,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:31:10,942 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:31:10,943 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:31:10,943 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850012326] [2021-07-13 19:31:10,943 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [850012326] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:31:10,943 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1149178491] [2021-07-13 19:31:10,943 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:31:10,970 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-13 19:31:10,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:31:10,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 19:31:10,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:31:11,054 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:31:11,055 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:31:11,055 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:31:11,056 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:31:11,058 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:31:11,058 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:31:11,059 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:31:11,059 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:31:11,061 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:31:11,062 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:31:11,062 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:31:11,063 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:31:11,064 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:31:11,065 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:31:11,066 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:31:11,097 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-07-13 19:31:11,097 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:31:11,098 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:31:11,098 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-07-13 19:31:11,145 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:31:11,145 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1149178491] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:31:11,145 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:31:11,145 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-07-13 19:31:11,145 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341831401] [2021-07-13 19:31:11,145 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:31:11,145 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:31:11,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:31:11,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:31:11,145 INFO L87 Difference]: Start difference. First operand 586 states and 1676 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:31:11,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:31:11,535 INFO L93 Difference]: Finished difference Result 678 states and 1828 transitions. [2021-07-13 19:31:11,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 19:31:11,535 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:31:11,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:31:11,536 INFO L225 Difference]: With dead ends: 678 [2021-07-13 19:31:11,536 INFO L226 Difference]: Without dead ends: 676 [2021-07-13 19:31:11,536 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 344.3ms TimeCoverageRelationStatistics Valid=111, Invalid=645, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:31:11,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 676 states. [2021-07-13 19:31:11,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 676 to 575. [2021-07-13 19:31:11,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 575 states, 574 states have (on average 2.857142857142857) internal successors, (1640), 574 states have internal predecessors, (1640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:31:11,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 575 states to 575 states and 1640 transitions. [2021-07-13 19:31:11,543 INFO L78 Accepts]: Start accepts. Automaton has 575 states and 1640 transitions. Word has length 17 [2021-07-13 19:31:11,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:31:11,543 INFO L482 AbstractCegarLoop]: Abstraction has 575 states and 1640 transitions. [2021-07-13 19:31:11,543 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:31:11,544 INFO L276 IsEmpty]: Start isEmpty. Operand 575 states and 1640 transitions. [2021-07-13 19:31:11,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:31:11,544 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:31:11,544 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:31:11,757 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1522 [2021-07-13 19:31:11,757 INFO L430 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:31:11,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:31:11,757 INFO L82 PathProgramCache]: Analyzing trace with hash 783656286, now seen corresponding path program 196 times [2021-07-13 19:31:11,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:31:11,757 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576612913] [2021-07-13 19:31:11,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:31:11,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:31:11,830 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:31:11,830 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:31:11,830 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576612913] [2021-07-13 19:31:11,831 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [576612913] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:31:11,831 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [281984709] [2021-07-13 19:31:11,831 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:31:11,856 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:31:11,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:31:11,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 19:31:11,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:31:11,940 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:31:11,941 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:31:11,941 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:31:11,942 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:31:11,944 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:31:11,944 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:31:11,944 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:31:11,945 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:31:11,947 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:31:11,948 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:31:11,948 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:31:11,948 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:31:11,950 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:31:11,951 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:31:11,951 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:31:11,984 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-07-13 19:31:11,984 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:31:11,984 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:31:11,984 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-07-13 19:31:12,049 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:31:12,049 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [281984709] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:31:12,050 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:31:12,050 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-07-13 19:31:12,050 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595742965] [2021-07-13 19:31:12,050 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:31:12,050 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:31:12,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:31:12,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:31:12,050 INFO L87 Difference]: Start difference. First operand 575 states and 1640 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:31:12,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:31:12,512 INFO L93 Difference]: Finished difference Result 648 states and 1777 transitions. [2021-07-13 19:31:12,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-13 19:31:12,513 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:31:12,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:31:12,514 INFO L225 Difference]: With dead ends: 648 [2021-07-13 19:31:12,514 INFO L226 Difference]: Without dead ends: 642 [2021-07-13 19:31:12,514 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 474.2ms TimeCoverageRelationStatistics Valid=135, Invalid=795, Unknown=0, NotChecked=0, Total=930 [2021-07-13 19:31:12,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 642 states. [2021-07-13 19:31:12,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 642 to 583. [2021-07-13 19:31:12,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 583 states, 582 states have (on average 2.852233676975945) internal successors, (1660), 582 states have internal predecessors, (1660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:31:12,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 583 states to 583 states and 1660 transitions. [2021-07-13 19:31:12,520 INFO L78 Accepts]: Start accepts. Automaton has 583 states and 1660 transitions. Word has length 17 [2021-07-13 19:31:12,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:31:12,521 INFO L482 AbstractCegarLoop]: Abstraction has 583 states and 1660 transitions. [2021-07-13 19:31:12,521 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:31:12,521 INFO L276 IsEmpty]: Start isEmpty. Operand 583 states and 1660 transitions. [2021-07-13 19:31:12,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:31:12,521 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:31:12,521 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:31:12,736 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1526,201 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:31:12,737 INFO L430 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:31:12,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:31:12,737 INFO L82 PathProgramCache]: Analyzing trace with hash -1792967304, now seen corresponding path program 197 times [2021-07-13 19:31:12,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:31:12,737 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406977515] [2021-07-13 19:31:12,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:31:12,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:31:12,811 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:31:12,811 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:31:12,811 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406977515] [2021-07-13 19:31:12,811 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406977515] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:31:12,811 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [392293455] [2021-07-13 19:31:12,811 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:31:12,841 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-13 19:31:12,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:31:12,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 19:31:12,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:31:12,926 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:31:12,926 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:31:12,926 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:31:12,927 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:31:12,929 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:31:12,930 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:31:12,930 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:31:12,930 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:31:12,933 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:31:12,933 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:31:12,933 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:31:12,934 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:31:12,936 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:31:12,936 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:31:12,937 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:31:12,968 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-07-13 19:31:12,969 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:31:12,969 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:31:12,969 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-07-13 19:31:13,014 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:31:13,014 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [392293455] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:31:13,015 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:31:13,015 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-07-13 19:31:13,015 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496196118] [2021-07-13 19:31:13,015 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:31:13,015 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:31:13,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:31:13,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:31:13,015 INFO L87 Difference]: Start difference. First operand 583 states and 1660 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:31:13,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:31:13,328 INFO L93 Difference]: Finished difference Result 645 states and 1769 transitions. [2021-07-13 19:31:13,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 19:31:13,329 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:31:13,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:31:13,330 INFO L225 Difference]: With dead ends: 645 [2021-07-13 19:31:13,330 INFO L226 Difference]: Without dead ends: 643 [2021-07-13 19:31:13,330 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 338.6ms TimeCoverageRelationStatistics Valid=110, Invalid=592, Unknown=0, NotChecked=0, Total=702 [2021-07-13 19:31:13,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 643 states. [2021-07-13 19:31:13,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 643 to 579. [2021-07-13 19:31:13,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 579 states, 578 states have (on average 2.837370242214533) internal successors, (1640), 578 states have internal predecessors, (1640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:31:13,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 579 states to 579 states and 1640 transitions. [2021-07-13 19:31:13,340 INFO L78 Accepts]: Start accepts. Automaton has 579 states and 1640 transitions. Word has length 17 [2021-07-13 19:31:13,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:31:13,340 INFO L482 AbstractCegarLoop]: Abstraction has 579 states and 1640 transitions. [2021-07-13 19:31:13,340 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:31:13,340 INFO L276 IsEmpty]: Start isEmpty. Operand 579 states and 1640 transitions. [2021-07-13 19:31:13,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:31:13,341 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:31:13,341 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:31:13,541 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 202 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1531 [2021-07-13 19:31:13,542 INFO L430 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:31:13,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:31:13,542 INFO L82 PathProgramCache]: Analyzing trace with hash 791386684, now seen corresponding path program 198 times [2021-07-13 19:31:13,542 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:31:13,542 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778005624] [2021-07-13 19:31:13,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:31:13,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:31:13,613 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:31:13,614 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:31:13,614 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778005624] [2021-07-13 19:31:13,614 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1778005624] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:31:13,614 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [887959374] [2021-07-13 19:31:13,614 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:31:13,642 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-13 19:31:13,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:31:13,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 19:31:13,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:31:13,758 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:31:13,759 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:31:13,759 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:31:13,760 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:31:13,762 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:31:13,762 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:31:13,763 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:31:13,786 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-07-13 19:31:13,786 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:31:13,789 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:31:13,789 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-07-13 19:31:13,809 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:31:13,810 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [887959374] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:31:13,810 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:31:13,810 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-07-13 19:31:13,810 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301634619] [2021-07-13 19:31:13,810 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:31:13,810 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:31:13,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:31:13,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:31:13,810 INFO L87 Difference]: Start difference. First operand 579 states and 1640 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:31:14,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:31:14,055 INFO L93 Difference]: Finished difference Result 674 states and 1852 transitions. [2021-07-13 19:31:14,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:31:14,055 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:31:14,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:31:14,056 INFO L225 Difference]: With dead ends: 674 [2021-07-13 19:31:14,056 INFO L226 Difference]: Without dead ends: 674 [2021-07-13 19:31:14,056 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 188.5ms TimeCoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:31:14,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 674 states. [2021-07-13 19:31:14,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 674 to 563. [2021-07-13 19:31:14,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 563 states, 562 states have (on average 2.8505338078291813) internal successors, (1602), 562 states have internal predecessors, (1602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:31:14,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 563 states to 563 states and 1602 transitions. [2021-07-13 19:31:14,063 INFO L78 Accepts]: Start accepts. Automaton has 563 states and 1602 transitions. Word has length 17 [2021-07-13 19:31:14,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:31:14,063 INFO L482 AbstractCegarLoop]: Abstraction has 563 states and 1602 transitions. [2021-07-13 19:31:14,063 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:31:14,063 INFO L276 IsEmpty]: Start isEmpty. Operand 563 states and 1602 transitions. [2021-07-13 19:31:14,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:31:14,064 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:31:14,064 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:31:14,265 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1535,203 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:31:14,265 INFO L430 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:31:14,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:31:14,265 INFO L82 PathProgramCache]: Analyzing trace with hash -38966150, now seen corresponding path program 199 times [2021-07-13 19:31:14,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:31:14,266 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743024973] [2021-07-13 19:31:14,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:31:14,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:31:14,343 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:31:14,343 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:31:14,343 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743024973] [2021-07-13 19:31:14,344 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1743024973] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:31:14,344 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1460752626] [2021-07-13 19:31:14,344 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:31:14,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:31:14,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 19:31:14,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:31:14,518 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:31:14,519 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:31:14,519 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:31:14,520 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:31:14,522 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:31:14,522 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:31:14,522 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:31:14,523 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:31:14,525 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:31:14,526 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:31:14,526 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:31:14,526 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:31:14,528 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:31:14,529 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:31:14,529 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:31:14,562 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-07-13 19:31:14,563 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:31:14,563 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:31:14,563 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-07-13 19:31:14,611 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:31:14,611 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1460752626] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:31:14,612 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:31:14,612 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-07-13 19:31:14,612 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504508573] [2021-07-13 19:31:14,612 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:31:14,612 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:31:14,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:31:14,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:31:14,612 INFO L87 Difference]: Start difference. First operand 563 states and 1602 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:31:14,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:31:14,941 INFO L93 Difference]: Finished difference Result 696 states and 1855 transitions. [2021-07-13 19:31:14,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:31:14,942 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:31:14,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:31:14,943 INFO L225 Difference]: With dead ends: 696 [2021-07-13 19:31:14,943 INFO L226 Difference]: Without dead ends: 694 [2021-07-13 19:31:14,943 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 328.2ms TimeCoverageRelationStatistics Valid=86, Invalid=514, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:31:14,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 694 states. [2021-07-13 19:31:14,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 694 to 579. [2021-07-13 19:31:14,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 579 states, 578 states have (on average 2.868512110726644) internal successors, (1658), 578 states have internal predecessors, (1658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:31:14,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 579 states to 579 states and 1658 transitions. [2021-07-13 19:31:14,950 INFO L78 Accepts]: Start accepts. Automaton has 579 states and 1658 transitions. Word has length 17 [2021-07-13 19:31:14,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:31:14,950 INFO L482 AbstractCegarLoop]: Abstraction has 579 states and 1658 transitions. [2021-07-13 19:31:14,950 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:31:14,950 INFO L276 IsEmpty]: Start isEmpty. Operand 579 states and 1658 transitions. [2021-07-13 19:31:14,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:31:14,950 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:31:14,951 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:31:15,164 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1538,204 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:31:15,165 INFO L430 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:31:15,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:31:15,165 INFO L82 PathProgramCache]: Analyzing trace with hash 762650078, now seen corresponding path program 200 times [2021-07-13 19:31:15,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:31:15,165 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37846315] [2021-07-13 19:31:15,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:31:15,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:31:15,235 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:31:15,236 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:31:15,236 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37846315] [2021-07-13 19:31:15,236 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [37846315] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:31:15,236 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1301300724] [2021-07-13 19:31:15,236 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:31:15,265 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:31:15,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:31:15,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 19:31:15,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:31:15,359 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:31:15,360 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:31:15,360 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:31:15,361 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:31:15,363 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:31:15,363 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:31:15,363 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:31:15,364 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:31:15,366 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:31:15,366 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:31:15,366 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:31:15,367 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:31:15,369 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:31:15,369 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:31:15,370 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:31:15,398 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-07-13 19:31:15,399 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:31:15,399 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:31:15,399 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-07-13 19:31:15,468 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:31:15,469 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1301300724] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:31:15,469 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:31:15,469 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-07-13 19:31:15,469 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91881870] [2021-07-13 19:31:15,469 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:31:15,469 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:31:15,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:31:15,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:31:15,469 INFO L87 Difference]: Start difference. First operand 579 states and 1658 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:31:16,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:31:16,202 INFO L93 Difference]: Finished difference Result 701 states and 1857 transitions. [2021-07-13 19:31:16,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-13 19:31:16,203 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:31:16,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:31:16,203 INFO L225 Difference]: With dead ends: 701 [2021-07-13 19:31:16,203 INFO L226 Difference]: Without dead ends: 691 [2021-07-13 19:31:16,204 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 313 ImplicationChecksByTransitivity, 660.7ms TimeCoverageRelationStatistics Valid=179, Invalid=1153, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 19:31:16,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 691 states. [2021-07-13 19:31:16,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 691 to 583. [2021-07-13 19:31:16,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 583 states, 582 states have (on average 2.857388316151203) internal successors, (1663), 582 states have internal predecessors, (1663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:31:16,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 583 states to 583 states and 1663 transitions. [2021-07-13 19:31:16,211 INFO L78 Accepts]: Start accepts. Automaton has 583 states and 1663 transitions. Word has length 17 [2021-07-13 19:31:16,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:31:16,211 INFO L482 AbstractCegarLoop]: Abstraction has 583 states and 1663 transitions. [2021-07-13 19:31:16,211 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:31:16,211 INFO L276 IsEmpty]: Start isEmpty. Operand 583 states and 1663 transitions. [2021-07-13 19:31:16,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:31:16,212 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:31:16,212 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:31:16,412 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1542,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:31:16,412 INFO L430 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:31:16,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:31:16,413 INFO L82 PathProgramCache]: Analyzing trace with hash -1813973512, now seen corresponding path program 201 times [2021-07-13 19:31:16,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:31:16,413 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568032515] [2021-07-13 19:31:16,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:31:16,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:31:16,501 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:31:16,501 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:31:16,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568032515] [2021-07-13 19:31:16,501 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1568032515] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:31:16,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [720526170] [2021-07-13 19:31:16,501 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:31:16,531 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-13 19:31:16,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:31:16,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 19:31:16,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:31:16,627 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:31:16,628 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:31:16,628 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:31:16,629 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:31:16,631 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:31:16,631 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:31:16,631 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:31:16,632 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:31:16,634 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:31:16,634 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:31:16,635 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:31:16,635 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:31:16,637 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:31:16,638 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:31:16,638 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:31:16,670 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-07-13 19:31:16,670 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:31:16,671 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:31:16,671 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-07-13 19:31:16,716 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:31:16,716 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [720526170] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:31:16,716 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:31:16,716 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-07-13 19:31:16,716 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876074074] [2021-07-13 19:31:16,716 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:31:16,716 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:31:16,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:31:16,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:31:16,717 INFO L87 Difference]: Start difference. First operand 583 states and 1663 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:31:17,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:31:17,188 INFO L93 Difference]: Finished difference Result 688 states and 1832 transitions. [2021-07-13 19:31:17,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 19:31:17,189 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:31:17,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:31:17,189 INFO L225 Difference]: With dead ends: 688 [2021-07-13 19:31:17,189 INFO L226 Difference]: Without dead ends: 686 [2021-07-13 19:31:17,190 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 483.6ms TimeCoverageRelationStatistics Valid=143, Invalid=787, Unknown=0, NotChecked=0, Total=930 [2021-07-13 19:31:17,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 686 states. [2021-07-13 19:31:17,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 686 to 559. [2021-07-13 19:31:17,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 559 states, 558 states have (on average 2.8297491039426523) internal successors, (1579), 558 states have internal predecessors, (1579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:31:17,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 559 states to 559 states and 1579 transitions. [2021-07-13 19:31:17,196 INFO L78 Accepts]: Start accepts. Automaton has 559 states and 1579 transitions. Word has length 17 [2021-07-13 19:31:17,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:31:17,196 INFO L482 AbstractCegarLoop]: Abstraction has 559 states and 1579 transitions. [2021-07-13 19:31:17,196 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:31:17,196 INFO L276 IsEmpty]: Start isEmpty. Operand 559 states and 1579 transitions. [2021-07-13 19:31:17,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:31:17,197 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:31:17,197 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:31:17,397 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1547,206 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:31:17,398 INFO L430 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:31:17,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:31:17,398 INFO L82 PathProgramCache]: Analyzing trace with hash 770380476, now seen corresponding path program 202 times [2021-07-13 19:31:17,398 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:31:17,398 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151227427] [2021-07-13 19:31:17,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:31:17,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:31:17,469 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:31:17,469 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:31:17,469 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151227427] [2021-07-13 19:31:17,469 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1151227427] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:31:17,470 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [649292917] [2021-07-13 19:31:17,470 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:31:17,496 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:31:17,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:31:17,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 19:31:17,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:31:17,614 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:31:17,615 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:31:17,615 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:31:17,616 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:31:17,618 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:31:17,618 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:31:17,618 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:31:17,639 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-07-13 19:31:17,640 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:31:17,640 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:31:17,640 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-07-13 19:31:17,659 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:31:17,659 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [649292917] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:31:17,659 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:31:17,659 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-07-13 19:31:17,659 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969130290] [2021-07-13 19:31:17,659 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:31:17,659 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:31:17,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:31:17,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:31:17,660 INFO L87 Difference]: Start difference. First operand 559 states and 1579 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:31:18,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:31:18,136 INFO L93 Difference]: Finished difference Result 678 states and 1798 transitions. [2021-07-13 19:31:18,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 19:31:18,136 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:31:18,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:31:18,137 INFO L225 Difference]: With dead ends: 678 [2021-07-13 19:31:18,137 INFO L226 Difference]: Without dead ends: 678 [2021-07-13 19:31:18,138 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 405.5ms TimeCoverageRelationStatistics Valid=129, Invalid=801, Unknown=0, NotChecked=0, Total=930 [2021-07-13 19:31:18,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 678 states. [2021-07-13 19:31:18,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 678 to 553. [2021-07-13 19:31:18,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 553 states, 552 states have (on average 2.8206521739130435) internal successors, (1557), 552 states have internal predecessors, (1557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:31:18,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 553 states to 553 states and 1557 transitions. [2021-07-13 19:31:18,144 INFO L78 Accepts]: Start accepts. Automaton has 553 states and 1557 transitions. Word has length 17 [2021-07-13 19:31:18,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:31:18,144 INFO L482 AbstractCegarLoop]: Abstraction has 553 states and 1557 transitions. [2021-07-13 19:31:18,144 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:31:18,144 INFO L276 IsEmpty]: Start isEmpty. Operand 553 states and 1557 transitions. [2021-07-13 19:31:18,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:31:18,144 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:31:18,144 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:31:18,345 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1551 [2021-07-13 19:31:18,345 INFO L430 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:31:18,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:31:18,345 INFO L82 PathProgramCache]: Analyzing trace with hash -719024520, now seen corresponding path program 203 times [2021-07-13 19:31:18,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:31:18,345 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223011132] [2021-07-13 19:31:18,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:31:18,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:31:18,425 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:31:18,425 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:31:18,425 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223011132] [2021-07-13 19:31:18,425 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1223011132] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:31:18,425 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1715456773] [2021-07-13 19:31:18,425 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:31:18,454 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:31:18,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:31:18,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 19:31:18,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:31:18,572 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:31:18,573 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:31:18,573 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:31:18,574 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:31:18,576 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:31:18,576 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:31:18,577 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:31:18,598 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-07-13 19:31:18,598 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:31:18,598 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:31:18,598 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-07-13 19:31:18,618 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:31:18,618 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1715456773] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:31:18,618 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:31:18,618 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-07-13 19:31:18,618 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464665692] [2021-07-13 19:31:18,618 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:31:18,618 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:31:18,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:31:18,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:31:18,619 INFO L87 Difference]: Start difference. First operand 553 states and 1557 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:31:18,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:31:18,820 INFO L93 Difference]: Finished difference Result 643 states and 1726 transitions. [2021-07-13 19:31:18,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 19:31:18,820 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:31:18,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:31:18,821 INFO L225 Difference]: With dead ends: 643 [2021-07-13 19:31:18,821 INFO L226 Difference]: Without dead ends: 643 [2021-07-13 19:31:18,821 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 174.5ms TimeCoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:31:18,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 643 states. [2021-07-13 19:31:18,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 643 to 548. [2021-07-13 19:31:18,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 548 states, 547 states have (on average 2.8153564899451555) internal successors, (1540), 547 states have internal predecessors, (1540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:31:18,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 548 states to 548 states and 1540 transitions. [2021-07-13 19:31:18,827 INFO L78 Accepts]: Start accepts. Automaton has 548 states and 1540 transitions. Word has length 17 [2021-07-13 19:31:18,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:31:18,827 INFO L482 AbstractCegarLoop]: Abstraction has 548 states and 1540 transitions. [2021-07-13 19:31:18,827 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:31:18,827 INFO L276 IsEmpty]: Start isEmpty. Operand 548 states and 1540 transitions. [2021-07-13 19:31:18,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:31:18,828 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:31:18,828 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:31:19,028 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 208 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1554 [2021-07-13 19:31:19,029 INFO L430 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:31:19,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:31:19,029 INFO L82 PathProgramCache]: Analyzing trace with hash -690158598, now seen corresponding path program 204 times [2021-07-13 19:31:19,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:31:19,029 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798077597] [2021-07-13 19:31:19,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:31:19,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:31:19,134 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:31:19,134 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:31:19,134 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798077597] [2021-07-13 19:31:19,135 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [798077597] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:31:19,135 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [160635576] [2021-07-13 19:31:19,135 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:31:19,162 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:31:19,162 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:31:19,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 19:31:19,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:31:19,272 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:31:19,272 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:31:19,272 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:31:19,273 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:31:19,275 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:31:19,276 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:31:19,276 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:31:19,276 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:31:19,279 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:31:19,279 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:31:19,279 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:31:19,280 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:31:19,282 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:31:19,282 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:31:19,283 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:31:19,314 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-07-13 19:31:19,314 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:31:19,315 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:31:19,315 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-07-13 19:31:19,365 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:31:19,365 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [160635576] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:31:19,365 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:31:19,365 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 19:31:19,365 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527178113] [2021-07-13 19:31:19,365 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:31:19,365 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:31:19,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:31:19,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:31:19,366 INFO L87 Difference]: Start difference. First operand 548 states and 1540 transitions. Second operand has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:31:19,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:31:19,714 INFO L93 Difference]: Finished difference Result 690 states and 1794 transitions. [2021-07-13 19:31:19,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 19:31:19,715 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:31:19,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:31:19,716 INFO L225 Difference]: With dead ends: 690 [2021-07-13 19:31:19,716 INFO L226 Difference]: Without dead ends: 690 [2021-07-13 19:31:19,716 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 351.8ms TimeCoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:31:19,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 690 states. [2021-07-13 19:31:19,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 690 to 566. [2021-07-13 19:31:19,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 566 states, 565 states have (on average 2.831858407079646) internal successors, (1600), 565 states have internal predecessors, (1600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:31:19,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 566 states to 566 states and 1600 transitions. [2021-07-13 19:31:19,722 INFO L78 Accepts]: Start accepts. Automaton has 566 states and 1600 transitions. Word has length 17 [2021-07-13 19:31:19,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:31:19,722 INFO L482 AbstractCegarLoop]: Abstraction has 566 states and 1600 transitions. [2021-07-13 19:31:19,723 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:31:19,723 INFO L276 IsEmpty]: Start isEmpty. Operand 566 states and 1600 transitions. [2021-07-13 19:31:19,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:31:19,723 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:31:19,723 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:31:19,923 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1557 [2021-07-13 19:31:19,924 INFO L430 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:31:19,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:31:19,924 INFO L82 PathProgramCache]: Analyzing trace with hash 111457630, now seen corresponding path program 205 times [2021-07-13 19:31:19,924 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:31:19,924 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013645357] [2021-07-13 19:31:19,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:31:19,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:31:20,018 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:31:20,019 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:31:20,019 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013645357] [2021-07-13 19:31:20,019 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1013645357] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:31:20,019 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1950293650] [2021-07-13 19:31:20,019 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:31:20,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:31:20,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 19:31:20,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:31:20,155 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:31:20,155 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:31:20,155 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:31:20,156 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:31:20,158 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:31:20,158 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:31:20,159 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:31:20,159 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:31:20,161 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:31:20,162 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:31:20,162 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:31:20,163 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:31:20,165 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:31:20,165 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:31:20,166 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:31:20,197 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-07-13 19:31:20,197 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:31:20,198 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:31:20,198 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-07-13 19:31:20,265 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:31:20,266 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1950293650] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:31:20,266 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:31:20,266 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 19:31:20,266 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134962017] [2021-07-13 19:31:20,266 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:31:20,266 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:31:20,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:31:20,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:31:20,266 INFO L87 Difference]: Start difference. First operand 566 states and 1600 transitions. Second operand has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:31:21,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:31:21,174 INFO L93 Difference]: Finished difference Result 716 states and 1856 transitions. [2021-07-13 19:31:21,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-13 19:31:21,174 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:31:21,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:31:21,175 INFO L225 Difference]: With dead ends: 716 [2021-07-13 19:31:21,175 INFO L226 Difference]: Without dead ends: 706 [2021-07-13 19:31:21,176 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 366 ImplicationChecksByTransitivity, 827.6ms TimeCoverageRelationStatistics Valid=197, Invalid=1443, Unknown=0, NotChecked=0, Total=1640 [2021-07-13 19:31:21,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 706 states. [2021-07-13 19:31:21,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 706 to 578. [2021-07-13 19:31:21,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 578 states, 577 states have (on average 2.8405545927209706) internal successors, (1639), 577 states have internal predecessors, (1639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:31:21,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 578 states to 578 states and 1639 transitions. [2021-07-13 19:31:21,183 INFO L78 Accepts]: Start accepts. Automaton has 578 states and 1639 transitions. Word has length 17 [2021-07-13 19:31:21,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:31:21,183 INFO L482 AbstractCegarLoop]: Abstraction has 578 states and 1639 transitions. [2021-07-13 19:31:21,183 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:31:21,183 INFO L276 IsEmpty]: Start isEmpty. Operand 578 states and 1639 transitions. [2021-07-13 19:31:21,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:31:21,183 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:31:21,183 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:31:21,384 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 210 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1561 [2021-07-13 19:31:21,384 INFO L430 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:31:21,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:31:21,384 INFO L82 PathProgramCache]: Analyzing trace with hash 1829801336, now seen corresponding path program 206 times [2021-07-13 19:31:21,384 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:31:21,384 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504856032] [2021-07-13 19:31:21,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:31:21,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:31:21,475 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:31:21,475 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:31:21,475 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504856032] [2021-07-13 19:31:21,475 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [504856032] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:31:21,475 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [999444633] [2021-07-13 19:31:21,475 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:31:21,503 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:31:21,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:31:21,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 19:31:21,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:31:21,623 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:31:21,624 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:31:21,624 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:31:21,625 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:31:21,627 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:31:21,627 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:31:21,627 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:31:21,628 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:31:21,630 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:31:21,631 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:31:21,631 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:31:21,632 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:31:21,633 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:31:21,634 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:31:21,634 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:31:21,666 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-07-13 19:31:21,666 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:31:21,667 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:31:21,667 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-07-13 19:31:21,724 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:31:21,724 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [999444633] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:31:21,725 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:31:21,725 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 19:31:21,725 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869889746] [2021-07-13 19:31:21,725 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:31:21,725 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:31:21,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:31:21,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:31:21,725 INFO L87 Difference]: Start difference. First operand 578 states and 1639 transitions. Second operand has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:31:22,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:31:22,131 INFO L93 Difference]: Finished difference Result 672 states and 1791 transitions. [2021-07-13 19:31:22,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 19:31:22,131 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:31:22,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:31:22,132 INFO L225 Difference]: With dead ends: 672 [2021-07-13 19:31:22,132 INFO L226 Difference]: Without dead ends: 672 [2021-07-13 19:31:22,132 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 438.3ms TimeCoverageRelationStatistics Valid=112, Invalid=644, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:31:22,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 672 states. [2021-07-13 19:31:22,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 672 to 574. [2021-07-13 19:31:22,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 574 states, 573 states have (on average 2.832460732984293) internal successors, (1623), 573 states have internal predecessors, (1623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:31:22,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 574 states to 574 states and 1623 transitions. [2021-07-13 19:31:22,139 INFO L78 Accepts]: Start accepts. Automaton has 574 states and 1623 transitions. Word has length 17 [2021-07-13 19:31:22,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:31:22,139 INFO L482 AbstractCegarLoop]: Abstraction has 574 states and 1623 transitions. [2021-07-13 19:31:22,139 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:31:22,139 INFO L276 IsEmpty]: Start isEmpty. Operand 574 states and 1623 transitions. [2021-07-13 19:31:22,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:31:22,140 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:31:22,140 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:31:22,340 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1566,211 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:31:22,340 INFO L430 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:31:22,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:31:22,341 INFO L82 PathProgramCache]: Analyzing trace with hash 119188028, now seen corresponding path program 207 times [2021-07-13 19:31:22,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:31:22,341 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019812509] [2021-07-13 19:31:22,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:31:22,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:31:22,426 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:31:22,427 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:31:22,427 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019812509] [2021-07-13 19:31:22,427 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2019812509] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:31:22,427 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1760895428] [2021-07-13 19:31:22,427 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:31:22,456 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 19:31:22,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:31:22,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 19:31:22,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:31:22,609 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:31:22,609 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:31:22,610 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:31:22,615 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:31:22,617 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:31:22,618 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:31:22,618 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:31:22,640 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-07-13 19:31:22,640 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:31:22,640 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:31:22,640 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-07-13 19:31:22,661 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:31:22,661 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1760895428] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:31:22,661 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:31:22,661 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 19:31:22,661 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678683997] [2021-07-13 19:31:22,661 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:31:22,661 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:31:22,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:31:22,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:31:22,662 INFO L87 Difference]: Start difference. First operand 574 states and 1623 transitions. Second operand has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:31:23,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:31:23,313 INFO L93 Difference]: Finished difference Result 736 states and 1924 transitions. [2021-07-13 19:31:23,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-13 19:31:23,313 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:31:23,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:31:23,314 INFO L225 Difference]: With dead ends: 736 [2021-07-13 19:31:23,314 INFO L226 Difference]: Without dead ends: 736 [2021-07-13 19:31:23,314 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 606.7ms TimeCoverageRelationStatistics Valid=161, Invalid=1099, Unknown=0, NotChecked=0, Total=1260 [2021-07-13 19:31:23,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 736 states. [2021-07-13 19:31:23,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 736 to 584. [2021-07-13 19:31:23,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 584 states, 583 states have (on average 2.8456260720411666) internal successors, (1659), 583 states have internal predecessors, (1659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:31:23,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 584 states to 584 states and 1659 transitions. [2021-07-13 19:31:23,321 INFO L78 Accepts]: Start accepts. Automaton has 584 states and 1659 transitions. Word has length 17 [2021-07-13 19:31:23,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:31:23,321 INFO L482 AbstractCegarLoop]: Abstraction has 584 states and 1659 transitions. [2021-07-13 19:31:23,321 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:31:23,321 INFO L276 IsEmpty]: Start isEmpty. Operand 584 states and 1659 transitions. [2021-07-13 19:31:23,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:31:23,322 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:31:23,322 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:31:23,522 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1570,212 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:31:23,523 INFO L430 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:31:23,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:31:23,523 INFO L82 PathProgramCache]: Analyzing trace with hash -1370216968, now seen corresponding path program 208 times [2021-07-13 19:31:23,523 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:31:23,523 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424925763] [2021-07-13 19:31:23,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:31:23,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:31:23,604 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:31:23,604 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:31:23,604 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424925763] [2021-07-13 19:31:23,604 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [424925763] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:31:23,604 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1315466949] [2021-07-13 19:31:23,605 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:31:23,631 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:31:23,632 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:31:23,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 19:31:23,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:31:23,761 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:31:23,761 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:31:23,762 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:31:23,762 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:31:23,764 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:31:23,765 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:31:23,765 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:31:23,786 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-07-13 19:31:23,786 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:31:23,787 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:31:23,787 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-07-13 19:31:23,808 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:31:23,808 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1315466949] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:31:23,808 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:31:23,809 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 19:31:23,809 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907592041] [2021-07-13 19:31:23,809 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:31:23,809 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:31:23,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:31:23,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:31:23,809 INFO L87 Difference]: Start difference. First operand 584 states and 1659 transitions. Second operand has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:31:24,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:31:24,845 INFO L93 Difference]: Finished difference Result 734 states and 1938 transitions. [2021-07-13 19:31:24,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-07-13 19:31:24,846 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:31:24,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:31:24,846 INFO L225 Difference]: With dead ends: 734 [2021-07-13 19:31:24,847 INFO L226 Difference]: Without dead ends: 734 [2021-07-13 19:31:24,847 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 545 ImplicationChecksByTransitivity, 860.6ms TimeCoverageRelationStatistics Valid=276, Invalid=1886, Unknown=0, NotChecked=0, Total=2162 [2021-07-13 19:31:24,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 734 states. [2021-07-13 19:31:24,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 734 to 574. [2021-07-13 19:31:24,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 574 states, 573 states have (on average 2.832460732984293) internal successors, (1623), 573 states have internal predecessors, (1623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:31:24,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 574 states to 574 states and 1623 transitions. [2021-07-13 19:31:24,853 INFO L78 Accepts]: Start accepts. Automaton has 574 states and 1623 transitions. Word has length 17 [2021-07-13 19:31:24,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:31:24,853 INFO L482 AbstractCegarLoop]: Abstraction has 574 states and 1623 transitions. [2021-07-13 19:31:24,853 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:31:24,853 INFO L276 IsEmpty]: Start isEmpty. Operand 574 states and 1623 transitions. [2021-07-13 19:31:24,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:31:24,854 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:31:24,854 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:31:25,054 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1573,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:31:25,055 INFO L430 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:31:25,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:31:25,055 INFO L82 PathProgramCache]: Analyzing trace with hash -297131588, now seen corresponding path program 209 times [2021-07-13 19:31:25,055 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:31:25,055 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283264062] [2021-07-13 19:31:25,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:31:25,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:31:25,133 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:31:25,133 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:31:25,133 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283264062] [2021-07-13 19:31:25,133 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [283264062] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:31:25,133 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1403456416] [2021-07-13 19:31:25,133 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:31:25,161 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:31:25,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:31:25,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 19:31:25,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:31:25,290 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:31:25,291 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:31:25,291 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:31:25,292 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:31:25,294 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:31:25,294 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:31:25,295 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:31:25,321 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-07-13 19:31:25,321 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:31:25,322 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:31:25,322 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-07-13 19:31:25,342 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:31:25,342 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1403456416] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:31:25,343 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:31:25,343 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 19:31:25,343 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494543314] [2021-07-13 19:31:25,343 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:31:25,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:31:25,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:31:25,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:31:25,343 INFO L87 Difference]: Start difference. First operand 574 states and 1623 transitions. Second operand has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:31:25,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:31:25,526 INFO L93 Difference]: Finished difference Result 624 states and 1716 transitions. [2021-07-13 19:31:25,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 19:31:25,526 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:31:25,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:31:25,527 INFO L225 Difference]: With dead ends: 624 [2021-07-13 19:31:25,527 INFO L226 Difference]: Without dead ends: 624 [2021-07-13 19:31:25,527 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 175.3ms TimeCoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:31:25,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 624 states. [2021-07-13 19:31:25,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 624 to 574. [2021-07-13 19:31:25,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 574 states, 573 states have (on average 2.832460732984293) internal successors, (1623), 573 states have internal predecessors, (1623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:31:25,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 574 states to 574 states and 1623 transitions. [2021-07-13 19:31:25,533 INFO L78 Accepts]: Start accepts. Automaton has 574 states and 1623 transitions. Word has length 17 [2021-07-13 19:31:25,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:31:25,534 INFO L482 AbstractCegarLoop]: Abstraction has 574 states and 1623 transitions. [2021-07-13 19:31:25,534 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:31:25,534 INFO L276 IsEmpty]: Start isEmpty. Operand 574 states and 1623 transitions. [2021-07-13 19:31:25,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:31:25,534 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:31:25,534 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:31:25,735 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 214 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1576 [2021-07-13 19:31:25,735 INFO L430 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:31:25,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:31:25,735 INFO L82 PathProgramCache]: Analyzing trace with hash 906074430, now seen corresponding path program 210 times [2021-07-13 19:31:25,735 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:31:25,735 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331580232] [2021-07-13 19:31:25,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:31:25,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:31:25,830 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:31:25,830 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:31:25,831 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331580232] [2021-07-13 19:31:25,831 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [331580232] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:31:25,831 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1110134473] [2021-07-13 19:31:25,831 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:31:25,860 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:31:25,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:31:25,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 19:31:25,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:31:25,986 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:31:25,987 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:31:25,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:31:25,987 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:31:25,989 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:31:25,990 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:31:25,990 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:31:26,007 INFO L628 ElimStorePlain]: treesize reduction 30, result has 33.3 percent of original size [2021-07-13 19:31:26,007 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:31:26,007 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:31:26,008 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:59, output treesize:15 [2021-07-13 19:31:26,030 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:31:26,030 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1110134473] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:31:26,030 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:31:26,030 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-13 19:31:26,030 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464964585] [2021-07-13 19:31:26,030 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:31:26,030 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:31:26,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:31:26,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:31:26,031 INFO L87 Difference]: Start difference. First operand 574 states and 1623 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:31:26,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:31:26,263 INFO L93 Difference]: Finished difference Result 706 states and 1888 transitions. [2021-07-13 19:31:26,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:31:26,263 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:31:26,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:31:26,264 INFO L225 Difference]: With dead ends: 706 [2021-07-13 19:31:26,264 INFO L226 Difference]: Without dead ends: 706 [2021-07-13 19:31:26,264 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 199.0ms TimeCoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:31:26,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 706 states. [2021-07-13 19:31:26,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 706 to 613. [2021-07-13 19:31:26,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 613 states, 612 states have (on average 2.8643790849673203) internal successors, (1753), 612 states have internal predecessors, (1753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:31:26,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 613 states to 613 states and 1753 transitions. [2021-07-13 19:31:26,275 INFO L78 Accepts]: Start accepts. Automaton has 613 states and 1753 transitions. Word has length 17 [2021-07-13 19:31:26,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:31:26,275 INFO L482 AbstractCegarLoop]: Abstraction has 613 states and 1753 transitions. [2021-07-13 19:31:26,275 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:31:26,275 INFO L276 IsEmpty]: Start isEmpty. Operand 613 states and 1753 transitions. [2021-07-13 19:31:26,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:31:26,276 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:31:26,276 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:31:26,492 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1579,215 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:31:26,492 INFO L430 AbstractCegarLoop]: === Iteration 225 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:31:26,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:31:26,492 INFO L82 PathProgramCache]: Analyzing trace with hash 1836957018, now seen corresponding path program 211 times [2021-07-13 19:31:26,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:31:26,493 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718187304] [2021-07-13 19:31:26,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:31:26,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:31:26,571 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:31:26,571 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:31:26,571 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718187304] [2021-07-13 19:31:26,571 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [718187304] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:31:26,571 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1511557852] [2021-07-13 19:31:26,571 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:31:26,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:31:26,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 19:31:26,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:31:26,737 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:31:26,738 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:31:26,740 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:31:26,740 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:31:26,740 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:31:26,741 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:31:26,743 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:31:26,744 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:31:26,746 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:31:26,746 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:31:26,747 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:31:26,747 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:31:26,749 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:31:26,750 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:31:26,751 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:31:26,752 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:31:26,778 INFO L628 ElimStorePlain]: treesize reduction 21, result has 58.0 percent of original size [2021-07-13 19:31:26,779 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:31:26,779 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:31:26,779 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 2 variables, input treesize:125, output treesize:29 [2021-07-13 19:31:26,812 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:31:26,812 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1511557852] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:31:26,812 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:31:26,812 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-13 19:31:26,812 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208140217] [2021-07-13 19:31:26,813 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:31:26,813 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:31:26,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:31:26,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:31:26,813 INFO L87 Difference]: Start difference. First operand 613 states and 1753 transitions. Second operand has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:31:27,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:31:27,231 INFO L93 Difference]: Finished difference Result 692 states and 1851 transitions. [2021-07-13 19:31:27,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 19:31:27,231 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:31:27,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:31:27,232 INFO L225 Difference]: With dead ends: 692 [2021-07-13 19:31:27,232 INFO L226 Difference]: Without dead ends: 684 [2021-07-13 19:31:27,232 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 403.7ms TimeCoverageRelationStatistics Valid=113, Invalid=879, Unknown=0, NotChecked=0, Total=992 [2021-07-13 19:31:27,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 684 states. [2021-07-13 19:31:27,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 684 to 619. [2021-07-13 19:31:27,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 619 states, 618 states have (on average 2.8462783171521036) internal successors, (1759), 618 states have internal predecessors, (1759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:31:27,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 619 states to 619 states and 1759 transitions. [2021-07-13 19:31:27,240 INFO L78 Accepts]: Start accepts. Automaton has 619 states and 1759 transitions. Word has length 17 [2021-07-13 19:31:27,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:31:27,240 INFO L482 AbstractCegarLoop]: Abstraction has 619 states and 1759 transitions. [2021-07-13 19:31:27,240 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:31:27,240 INFO L276 IsEmpty]: Start isEmpty. Operand 619 states and 1759 transitions. [2021-07-13 19:31:27,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:31:27,240 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:31:27,241 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:31:27,441 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1581,216 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:31:27,441 INFO L430 AbstractCegarLoop]: === Iteration 226 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:31:27,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:31:27,441 INFO L82 PathProgramCache]: Analyzing trace with hash -254947684, now seen corresponding path program 212 times [2021-07-13 19:31:27,442 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:31:27,442 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584389791] [2021-07-13 19:31:27,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:31:27,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:31:27,520 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:31:27,520 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:31:27,520 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584389791] [2021-07-13 19:31:27,520 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1584389791] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:31:27,520 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1130002031] [2021-07-13 19:31:27,520 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:31:27,548 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:31:27,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:31:27,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 19:31:27,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:31:27,683 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:31:27,683 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:31:27,684 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:31:27,684 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:31:27,686 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:31:27,686 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:31:27,687 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:31:27,704 INFO L628 ElimStorePlain]: treesize reduction 30, result has 33.3 percent of original size [2021-07-13 19:31:27,704 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:31:27,705 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:31:27,705 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:59, output treesize:15 [2021-07-13 19:31:27,727 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:31:27,727 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1130002031] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:31:27,727 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:31:27,727 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-13 19:31:27,727 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196954136] [2021-07-13 19:31:27,727 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:31:27,727 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:31:27,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:31:27,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:31:27,728 INFO L87 Difference]: Start difference. First operand 619 states and 1759 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:31:28,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:31:28,654 INFO L93 Difference]: Finished difference Result 784 states and 2026 transitions. [2021-07-13 19:31:28,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-07-13 19:31:28,654 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:31:28,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:31:28,655 INFO L225 Difference]: With dead ends: 784 [2021-07-13 19:31:28,655 INFO L226 Difference]: Without dead ends: 780 [2021-07-13 19:31:28,656 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 522 ImplicationChecksByTransitivity, 815.6ms TimeCoverageRelationStatistics Valid=256, Invalid=1814, Unknown=0, NotChecked=0, Total=2070 [2021-07-13 19:31:28,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 780 states. [2021-07-13 19:31:28,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 780 to 614. [2021-07-13 19:31:28,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 614 states, 613 states have (on average 2.858075040783034) internal successors, (1752), 613 states have internal predecessors, (1752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:31:28,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 614 states to 614 states and 1752 transitions. [2021-07-13 19:31:28,663 INFO L78 Accepts]: Start accepts. Automaton has 614 states and 1752 transitions. Word has length 17 [2021-07-13 19:31:28,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:31:28,663 INFO L482 AbstractCegarLoop]: Abstraction has 614 states and 1752 transitions. [2021-07-13 19:31:28,663 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:31:28,663 INFO L276 IsEmpty]: Start isEmpty. Operand 614 states and 1752 transitions. [2021-07-13 19:31:28,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:31:28,664 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:31:28,664 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:31:28,866 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 217 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1586 [2021-07-13 19:31:28,866 INFO L430 AbstractCegarLoop]: === Iteration 227 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:31:28,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:31:28,866 INFO L82 PathProgramCache]: Analyzing trace with hash 1299101440, now seen corresponding path program 213 times [2021-07-13 19:31:28,866 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:31:28,866 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261883306] [2021-07-13 19:31:28,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:31:28,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:31:28,947 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:31:28,948 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:31:28,948 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261883306] [2021-07-13 19:31:28,948 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [261883306] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:31:28,948 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [197387822] [2021-07-13 19:31:28,948 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:31:28,976 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:31:28,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:31:28,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 19:31:28,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:31:29,123 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:31:29,124 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:31:29,126 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:31:29,126 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:31:29,126 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:31:29,127 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:31:29,130 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:31:29,130 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:31:29,133 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:31:29,133 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:31:29,134 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:31:29,135 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:31:29,137 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:31:29,137 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:31:29,139 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:31:29,140 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:31:29,167 INFO L628 ElimStorePlain]: treesize reduction 21, result has 58.0 percent of original size [2021-07-13 19:31:29,167 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:31:29,167 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:31:29,167 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 2 variables, input treesize:125, output treesize:29 [2021-07-13 19:31:29,199 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:31:29,199 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [197387822] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:31:29,199 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:31:29,199 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-13 19:31:29,199 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213202403] [2021-07-13 19:31:29,199 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:31:29,199 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:31:29,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:31:29,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:31:29,200 INFO L87 Difference]: Start difference. First operand 614 states and 1752 transitions. Second operand has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:31:29,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:31:29,804 INFO L93 Difference]: Finished difference Result 701 states and 1867 transitions. [2021-07-13 19:31:29,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-13 19:31:29,804 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:31:29,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:31:29,805 INFO L225 Difference]: With dead ends: 701 [2021-07-13 19:31:29,805 INFO L226 Difference]: Without dead ends: 695 [2021-07-13 19:31:29,805 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 308 ImplicationChecksByTransitivity, 571.1ms TimeCoverageRelationStatistics Valid=166, Invalid=1240, Unknown=0, NotChecked=0, Total=1406 [2021-07-13 19:31:29,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 695 states. [2021-07-13 19:31:29,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 695 to 617. [2021-07-13 19:31:29,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 617 states, 616 states have (on average 2.8490259740259742) internal successors, (1755), 616 states have internal predecessors, (1755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:31:29,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 617 states to 617 states and 1755 transitions. [2021-07-13 19:31:29,813 INFO L78 Accepts]: Start accepts. Automaton has 617 states and 1755 transitions. Word has length 17 [2021-07-13 19:31:29,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:31:29,813 INFO L482 AbstractCegarLoop]: Abstraction has 617 states and 1755 transitions. [2021-07-13 19:31:29,813 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:31:29,813 INFO L276 IsEmpty]: Start isEmpty. Operand 617 states and 1755 transitions. [2021-07-13 19:31:29,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:31:29,813 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:31:29,814 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:31:30,029 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1588,218 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:31:30,029 INFO L430 AbstractCegarLoop]: === Iteration 228 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:31:30,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:31:30,029 INFO L82 PathProgramCache]: Analyzing trace with hash -15305346, now seen corresponding path program 214 times [2021-07-13 19:31:30,030 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:31:30,030 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669085622] [2021-07-13 19:31:30,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:31:30,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:31:30,117 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:31:30,117 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:31:30,117 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669085622] [2021-07-13 19:31:30,117 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1669085622] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:31:30,117 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1659493059] [2021-07-13 19:31:30,117 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:31:30,143 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:31:30,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:31:30,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 19:31:30,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:31:30,281 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:31:30,282 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:31:30,282 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:31:30,283 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:31:30,285 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:31:30,285 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:31:30,286 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:31:30,303 INFO L628 ElimStorePlain]: treesize reduction 30, result has 33.3 percent of original size [2021-07-13 19:31:30,303 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:31:30,303 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:31:30,303 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:59, output treesize:15 [2021-07-13 19:31:30,326 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:31:30,326 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1659493059] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:31:30,326 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:31:30,326 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-13 19:31:30,326 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365006930] [2021-07-13 19:31:30,326 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:31:30,326 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:31:30,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:31:30,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:31:30,327 INFO L87 Difference]: Start difference. First operand 617 states and 1755 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:31:31,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:31:31,174 INFO L93 Difference]: Finished difference Result 784 states and 2032 transitions. [2021-07-13 19:31:31,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-13 19:31:31,174 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:31:31,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:31:31,175 INFO L225 Difference]: With dead ends: 784 [2021-07-13 19:31:31,175 INFO L226 Difference]: Without dead ends: 779 [2021-07-13 19:31:31,176 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 384 ImplicationChecksByTransitivity, 677.9ms TimeCoverageRelationStatistics Valid=197, Invalid=1443, Unknown=0, NotChecked=0, Total=1640 [2021-07-13 19:31:31,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 779 states. [2021-07-13 19:31:31,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 779 to 621. [2021-07-13 19:31:31,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 621 states, 620 states have (on average 2.861290322580645) internal successors, (1774), 620 states have internal predecessors, (1774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:31:31,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 621 states to 621 states and 1774 transitions. [2021-07-13 19:31:31,183 INFO L78 Accepts]: Start accepts. Automaton has 621 states and 1774 transitions. Word has length 17 [2021-07-13 19:31:31,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:31:31,183 INFO L482 AbstractCegarLoop]: Abstraction has 621 states and 1774 transitions. [2021-07-13 19:31:31,183 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:31:31,183 INFO L276 IsEmpty]: Start isEmpty. Operand 621 states and 1774 transitions. [2021-07-13 19:31:31,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:31:31,184 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:31:31,184 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:31:31,384 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1593,219 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:31:31,384 INFO L430 AbstractCegarLoop]: === Iteration 229 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:31:31,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:31:31,385 INFO L82 PathProgramCache]: Analyzing trace with hash -935006054, now seen corresponding path program 215 times [2021-07-13 19:31:31,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:31:31,385 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759238848] [2021-07-13 19:31:31,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:31:31,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:31:31,476 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:31:31,476 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:31:31,476 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759238848] [2021-07-13 19:31:31,476 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1759238848] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:31:31,476 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1228270507] [2021-07-13 19:31:31,476 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:31:31,505 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:31:31,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:31:31,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 19:31:31,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:31:31,651 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:31:31,652 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:31:31,655 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:31:31,655 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:31:31,656 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:31:31,656 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:31:31,658 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:31:31,659 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:31:31,661 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:31:31,662 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:31:31,662 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:31:31,663 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:31:31,664 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:31:31,665 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:31:31,667 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:31:31,667 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:31:31,695 INFO L628 ElimStorePlain]: treesize reduction 21, result has 58.0 percent of original size [2021-07-13 19:31:31,695 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:31:31,696 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:31:31,696 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 2 variables, input treesize:125, output treesize:29 [2021-07-13 19:31:31,728 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:31:31,729 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1228270507] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:31:31,729 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:31:31,729 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-13 19:31:31,729 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400659583] [2021-07-13 19:31:31,729 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:31:31,729 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:31:31,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:31:31,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:31:31,729 INFO L87 Difference]: Start difference. First operand 621 states and 1774 transitions. Second operand has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:31:32,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:31:32,305 INFO L93 Difference]: Finished difference Result 681 states and 1857 transitions. [2021-07-13 19:31:32,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-13 19:31:32,306 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:31:32,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:31:32,307 INFO L225 Difference]: With dead ends: 681 [2021-07-13 19:31:32,307 INFO L226 Difference]: Without dead ends: 677 [2021-07-13 19:31:32,307 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 569.1ms TimeCoverageRelationStatistics Valid=152, Invalid=1038, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 19:31:32,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 677 states. [2021-07-13 19:31:32,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 677 to 622. [2021-07-13 19:31:32,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 622 states, 621 states have (on average 2.848631239935588) internal successors, (1769), 621 states have internal predecessors, (1769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:31:32,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 622 states to 622 states and 1769 transitions. [2021-07-13 19:31:32,314 INFO L78 Accepts]: Start accepts. Automaton has 622 states and 1769 transitions. Word has length 17 [2021-07-13 19:31:32,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:31:32,314 INFO L482 AbstractCegarLoop]: Abstraction has 622 states and 1769 transitions. [2021-07-13 19:31:32,314 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:31:32,314 INFO L276 IsEmpty]: Start isEmpty. Operand 622 states and 1769 transitions. [2021-07-13 19:31:32,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:31:32,315 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:31:32,315 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:31:32,515 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 220 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1595 [2021-07-13 19:31:32,515 INFO L430 AbstractCegarLoop]: === Iteration 230 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:31:32,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:31:32,516 INFO L82 PathProgramCache]: Analyzing trace with hash -7574948, now seen corresponding path program 216 times [2021-07-13 19:31:32,516 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:31:32,516 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251083941] [2021-07-13 19:31:32,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:31:32,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:31:32,604 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:31:32,604 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:31:32,604 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251083941] [2021-07-13 19:31:32,604 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [251083941] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:31:32,604 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [204550215] [2021-07-13 19:31:32,604 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:31:32,631 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:31:32,632 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:31:32,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 19:31:32,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:31:32,773 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:31:32,774 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:31:32,774 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:31:32,775 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:31:32,777 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:31:32,777 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:31:32,778 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:31:32,778 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:31:32,780 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:31:32,781 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:31:32,781 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:31:32,782 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:31:32,784 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:31:32,784 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:31:32,785 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:31:32,819 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-07-13 19:31:32,820 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:31:32,820 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:31:32,820 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-07-13 19:31:32,881 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:31:32,881 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [204550215] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:31:32,881 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:31:32,882 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-13 19:31:32,882 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725696731] [2021-07-13 19:31:32,882 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:31:32,882 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:31:32,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:31:32,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:31:32,882 INFO L87 Difference]: Start difference. First operand 622 states and 1769 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:31:33,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:31:33,483 INFO L93 Difference]: Finished difference Result 783 states and 1990 transitions. [2021-07-13 19:31:33,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-13 19:31:33,484 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:31:33,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:31:33,485 INFO L225 Difference]: With dead ends: 783 [2021-07-13 19:31:33,485 INFO L226 Difference]: Without dead ends: 781 [2021-07-13 19:31:33,485 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 566.9ms TimeCoverageRelationStatistics Valid=142, Invalid=850, Unknown=0, NotChecked=0, Total=992 [2021-07-13 19:31:33,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 781 states. [2021-07-13 19:31:33,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 781 to 603. [2021-07-13 19:31:33,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 603 states, 602 states have (on average 2.835548172757475) internal successors, (1707), 602 states have internal predecessors, (1707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:31:33,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 603 states to 603 states and 1707 transitions. [2021-07-13 19:31:33,497 INFO L78 Accepts]: Start accepts. Automaton has 603 states and 1707 transitions. Word has length 17 [2021-07-13 19:31:33,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:31:33,498 INFO L482 AbstractCegarLoop]: Abstraction has 603 states and 1707 transitions. [2021-07-13 19:31:33,498 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:31:33,498 INFO L276 IsEmpty]: Start isEmpty. Operand 603 states and 1707 transitions. [2021-07-13 19:31:33,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:31:33,498 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:31:33,498 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:31:33,699 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1600,221 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:31:33,699 INFO L430 AbstractCegarLoop]: === Iteration 231 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:31:33,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:31:33,700 INFO L82 PathProgramCache]: Analyzing trace with hash 794041280, now seen corresponding path program 217 times [2021-07-13 19:31:33,700 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:31:33,700 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071014846] [2021-07-13 19:31:33,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:31:33,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:31:33,788 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:31:33,789 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:31:33,789 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071014846] [2021-07-13 19:31:33,789 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2071014846] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:31:33,789 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1601633669] [2021-07-13 19:31:33,789 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:31:33,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:31:33,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 19:31:33,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:31:33,944 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:31:33,945 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:31:33,945 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:31:33,946 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:31:33,948 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:31:33,948 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:31:33,948 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:31:33,949 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:31:33,951 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:31:33,952 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:31:33,952 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:31:33,952 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:31:33,954 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:31:33,955 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:31:33,955 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:31:33,987 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-07-13 19:31:33,987 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:31:33,988 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:31:33,988 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-07-13 19:31:34,057 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:31:34,057 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1601633669] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:31:34,057 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:31:34,057 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-13 19:31:34,057 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863626886] [2021-07-13 19:31:34,057 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:31:34,057 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:31:34,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:31:34,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:31:34,058 INFO L87 Difference]: Start difference. First operand 603 states and 1707 transitions. Second operand has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:31:34,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:31:34,651 INFO L93 Difference]: Finished difference Result 687 states and 1842 transitions. [2021-07-13 19:31:34,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 19:31:34,652 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:31:34,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:31:34,653 INFO L225 Difference]: With dead ends: 687 [2021-07-13 19:31:34,653 INFO L226 Difference]: Without dead ends: 683 [2021-07-13 19:31:34,653 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 586.2ms TimeCoverageRelationStatistics Valid=149, Invalid=907, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 19:31:34,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 683 states. [2021-07-13 19:31:34,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 683 to 607. [2021-07-13 19:31:34,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 607 states, 606 states have (on average 2.8333333333333335) internal successors, (1717), 606 states have internal predecessors, (1717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:31:34,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 607 states to 607 states and 1717 transitions. [2021-07-13 19:31:34,660 INFO L78 Accepts]: Start accepts. Automaton has 607 states and 1717 transitions. Word has length 17 [2021-07-13 19:31:34,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:31:34,660 INFO L482 AbstractCegarLoop]: Abstraction has 607 states and 1717 transitions. [2021-07-13 19:31:34,660 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:31:34,660 INFO L276 IsEmpty]: Start isEmpty. Operand 607 states and 1717 transitions. [2021-07-13 19:31:34,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:31:34,660 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:31:34,660 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:31:34,861 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 222 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1604 [2021-07-13 19:31:34,861 INFO L430 AbstractCegarLoop]: === Iteration 232 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:31:34,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:31:34,861 INFO L82 PathProgramCache]: Analyzing trace with hash -1782582310, now seen corresponding path program 218 times [2021-07-13 19:31:34,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:31:34,861 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447536173] [2021-07-13 19:31:34,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:31:34,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:31:34,950 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:31:34,951 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:31:34,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447536173] [2021-07-13 19:31:34,951 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [447536173] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:31:34,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1239584092] [2021-07-13 19:31:34,951 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:31:34,978 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:31:34,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:31:34,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 19:31:34,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:31:35,109 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:31:35,109 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:31:35,110 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:31:35,110 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:31:35,113 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:31:35,113 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:31:35,113 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:31:35,114 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:31:35,116 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:31:35,116 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:31:35,117 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:31:35,117 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:31:35,119 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:31:35,119 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:31:35,120 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:31:35,152 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-07-13 19:31:35,153 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:31:35,153 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:31:35,153 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-07-13 19:31:35,203 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:31:35,203 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1239584092] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:31:35,203 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:31:35,203 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-13 19:31:35,203 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062042530] [2021-07-13 19:31:35,204 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:31:35,204 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:31:35,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:31:35,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:31:35,204 INFO L87 Difference]: Start difference. First operand 607 states and 1717 transitions. Second operand has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:31:35,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:31:35,567 INFO L93 Difference]: Finished difference Result 678 states and 1827 transitions. [2021-07-13 19:31:35,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:31:35,568 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:31:35,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:31:35,568 INFO L225 Difference]: With dead ends: 678 [2021-07-13 19:31:35,569 INFO L226 Difference]: Without dead ends: 678 [2021-07-13 19:31:35,569 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 400.6ms TimeCoverageRelationStatistics Valid=105, Invalid=597, Unknown=0, NotChecked=0, Total=702 [2021-07-13 19:31:35,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 678 states. [2021-07-13 19:31:35,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 678 to 592. [2021-07-13 19:31:35,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 592 states, 591 states have (on average 2.83248730964467) internal successors, (1674), 591 states have internal predecessors, (1674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:31:35,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 592 states to 592 states and 1674 transitions. [2021-07-13 19:31:35,575 INFO L78 Accepts]: Start accepts. Automaton has 592 states and 1674 transitions. Word has length 17 [2021-07-13 19:31:35,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:31:35,575 INFO L482 AbstractCegarLoop]: Abstraction has 592 states and 1674 transitions. [2021-07-13 19:31:35,575 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:31:35,575 INFO L276 IsEmpty]: Start isEmpty. Operand 592 states and 1674 transitions. [2021-07-13 19:31:35,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:31:35,576 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:31:35,576 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:31:35,777 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1609,223 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:31:35,777 INFO L430 AbstractCegarLoop]: === Iteration 233 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:31:35,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:31:35,777 INFO L82 PathProgramCache]: Analyzing trace with hash 505854650, now seen corresponding path program 219 times [2021-07-13 19:31:35,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:31:35,777 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319144524] [2021-07-13 19:31:35,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:31:35,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:31:35,850 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:31:35,850 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:31:35,850 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319144524] [2021-07-13 19:31:35,850 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [319144524] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:31:35,850 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [880566146] [2021-07-13 19:31:35,850 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:31:35,878 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-13 19:31:35,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:31:35,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 19:31:35,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:31:35,985 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:31:35,985 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:31:35,986 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:31:35,986 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:31:35,988 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:31:35,989 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:31:35,989 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:31:35,990 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:31:35,992 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:31:35,992 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:31:35,992 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:31:35,993 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:31:35,995 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:31:35,995 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:31:35,996 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:31:36,028 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-07-13 19:31:36,028 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:31:36,028 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:31:36,028 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-07-13 19:31:36,089 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:31:36,089 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [880566146] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:31:36,090 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:31:36,090 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-07-13 19:31:36,090 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864141811] [2021-07-13 19:31:36,090 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:31:36,090 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:31:36,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:31:36,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:31:36,090 INFO L87 Difference]: Start difference. First operand 592 states and 1674 transitions. Second operand has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:31:36,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:31:36,645 INFO L93 Difference]: Finished difference Result 624 states and 1727 transitions. [2021-07-13 19:31:36,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-13 19:31:36,645 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:31:36,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:31:36,646 INFO L225 Difference]: With dead ends: 624 [2021-07-13 19:31:36,646 INFO L226 Difference]: Without dead ends: 620 [2021-07-13 19:31:36,646 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 544.8ms TimeCoverageRelationStatistics Valid=151, Invalid=971, Unknown=0, NotChecked=0, Total=1122 [2021-07-13 19:31:36,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 620 states. [2021-07-13 19:31:36,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 620 to 594. [2021-07-13 19:31:36,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 594 states, 593 states have (on average 2.8279932546374367) internal successors, (1677), 593 states have internal predecessors, (1677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:31:36,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 594 states to 594 states and 1677 transitions. [2021-07-13 19:31:36,653 INFO L78 Accepts]: Start accepts. Automaton has 594 states and 1677 transitions. Word has length 17 [2021-07-13 19:31:36,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:31:36,653 INFO L482 AbstractCegarLoop]: Abstraction has 594 states and 1677 transitions. [2021-07-13 19:31:36,653 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:31:36,653 INFO L276 IsEmpty]: Start isEmpty. Operand 594 states and 1677 transitions. [2021-07-13 19:31:36,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:31:36,654 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:31:36,654 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:31:36,854 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 224 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1613 [2021-07-13 19:31:36,854 INFO L430 AbstractCegarLoop]: === Iteration 234 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:31:36,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:31:36,855 INFO L82 PathProgramCache]: Analyzing trace with hash -1517986152, now seen corresponding path program 220 times [2021-07-13 19:31:36,855 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:31:36,855 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642459942] [2021-07-13 19:31:36,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:31:36,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:31:36,927 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:31:36,927 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:31:36,927 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642459942] [2021-07-13 19:31:36,927 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [642459942] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:31:36,927 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [122166073] [2021-07-13 19:31:36,928 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:31:36,954 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:31:36,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:31:36,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 19:31:36,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:31:37,052 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:31:37,052 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:31:37,053 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:31:37,053 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:31:37,055 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:31:37,056 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:31:37,056 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:31:37,057 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:31:37,059 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:31:37,059 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:31:37,059 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:31:37,060 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:31:37,062 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:31:37,062 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:31:37,063 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:31:37,095 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-07-13 19:31:37,095 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:31:37,095 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:31:37,095 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-07-13 19:31:37,143 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:31:37,143 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [122166073] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:31:37,143 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:31:37,143 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 17 [2021-07-13 19:31:37,143 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772380584] [2021-07-13 19:31:37,143 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:31:37,143 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:31:37,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:31:37,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:31:37,144 INFO L87 Difference]: Start difference. First operand 594 states and 1677 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:31:37,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:31:37,422 INFO L93 Difference]: Finished difference Result 722 states and 1901 transitions. [2021-07-13 19:31:37,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:31:37,430 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:31:37,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:31:37,431 INFO L225 Difference]: With dead ends: 722 [2021-07-13 19:31:37,431 INFO L226 Difference]: Without dead ends: 722 [2021-07-13 19:31:37,431 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 282.2ms TimeCoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:31:37,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 722 states. [2021-07-13 19:31:37,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 722 to 606. [2021-07-13 19:31:37,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 606 states, 605 states have (on average 2.8413223140495867) internal successors, (1719), 605 states have internal predecessors, (1719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:31:37,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 606 states to 606 states and 1719 transitions. [2021-07-13 19:31:37,438 INFO L78 Accepts]: Start accepts. Automaton has 606 states and 1719 transitions. Word has length 17 [2021-07-13 19:31:37,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:31:37,438 INFO L482 AbstractCegarLoop]: Abstraction has 606 states and 1719 transitions. [2021-07-13 19:31:37,438 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:31:37,438 INFO L276 IsEmpty]: Start isEmpty. Operand 606 states and 1719 transitions. [2021-07-13 19:31:37,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:31:37,439 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:31:37,439 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:31:37,640 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1619,225 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:31:37,640 INFO L430 AbstractCegarLoop]: === Iteration 235 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:31:37,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:31:37,640 INFO L82 PathProgramCache]: Analyzing trace with hash -716369924, now seen corresponding path program 221 times [2021-07-13 19:31:37,640 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:31:37,640 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325604318] [2021-07-13 19:31:37,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:31:37,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:31:37,769 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:31:37,770 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:31:37,770 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325604318] [2021-07-13 19:31:37,770 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [325604318] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:31:37,770 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [15512942] [2021-07-13 19:31:37,770 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:31:37,808 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:31:37,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:31:37,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 19:31:37,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:31:37,915 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:31:37,916 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:31:37,916 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:31:37,917 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:31:37,919 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:31:37,919 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:31:37,920 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:31:37,920 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:31:37,923 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:31:37,923 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:31:37,923 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:31:37,924 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:31:37,926 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:31:37,926 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:31:37,927 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:31:37,958 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-07-13 19:31:37,958 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:31:37,959 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:31:37,959 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-07-13 19:31:38,028 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:31:38,028 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [15512942] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:31:38,029 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:31:38,029 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 17 [2021-07-13 19:31:38,029 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359592200] [2021-07-13 19:31:38,029 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:31:38,029 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:31:38,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:31:38,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:31:38,029 INFO L87 Difference]: Start difference. First operand 606 states and 1719 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:31:38,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:31:38,515 INFO L93 Difference]: Finished difference Result 766 states and 2029 transitions. [2021-07-13 19:31:38,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-13 19:31:38,516 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:31:38,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:31:38,517 INFO L225 Difference]: With dead ends: 766 [2021-07-13 19:31:38,517 INFO L226 Difference]: Without dead ends: 760 [2021-07-13 19:31:38,517 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 523.4ms TimeCoverageRelationStatistics Valid=127, Invalid=803, Unknown=0, NotChecked=0, Total=930 [2021-07-13 19:31:38,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 760 states. [2021-07-13 19:31:38,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 760 to 655. [2021-07-13 19:31:38,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 655 states, 654 states have (on average 2.853211009174312) internal successors, (1866), 654 states have internal predecessors, (1866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:31:38,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 655 states to 655 states and 1866 transitions. [2021-07-13 19:31:38,525 INFO L78 Accepts]: Start accepts. Automaton has 655 states and 1866 transitions. Word has length 17 [2021-07-13 19:31:38,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:31:38,525 INFO L482 AbstractCegarLoop]: Abstraction has 655 states and 1866 transitions. [2021-07-13 19:31:38,525 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:31:38,525 INFO L276 IsEmpty]: Start isEmpty. Operand 655 states and 1866 transitions. [2021-07-13 19:31:38,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:31:38,526 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:31:38,526 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:31:38,726 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 226 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1623 [2021-07-13 19:31:38,726 INFO L430 AbstractCegarLoop]: === Iteration 236 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:31:38,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:31:38,727 INFO L82 PathProgramCache]: Analyzing trace with hash 1001973782, now seen corresponding path program 222 times [2021-07-13 19:31:38,727 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:31:38,727 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561264627] [2021-07-13 19:31:38,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:31:38,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:31:38,809 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:31:38,809 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:31:38,809 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561264627] [2021-07-13 19:31:38,809 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [561264627] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:31:38,809 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1558035721] [2021-07-13 19:31:38,809 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:31:38,836 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:31:38,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:31:38,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 19:31:38,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:31:38,931 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:31:38,931 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:31:38,931 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:31:38,932 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:31:38,934 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:31:38,934 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:31:38,935 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:31:38,935 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:31:38,937 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:31:38,938 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:31:38,938 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:31:38,939 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:31:38,941 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:31:38,941 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:31:38,942 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:31:38,975 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-07-13 19:31:38,975 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:31:38,976 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:31:38,976 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-07-13 19:31:39,038 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:31:39,039 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1558035721] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:31:39,039 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:31:39,039 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 17 [2021-07-13 19:31:39,039 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474727108] [2021-07-13 19:31:39,039 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:31:39,039 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:31:39,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:31:39,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:31:39,039 INFO L87 Difference]: Start difference. First operand 655 states and 1866 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:31:39,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:31:39,351 INFO L93 Difference]: Finished difference Result 739 states and 1992 transitions. [2021-07-13 19:31:39,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:31:39,351 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:31:39,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:31:39,352 INFO L225 Difference]: With dead ends: 739 [2021-07-13 19:31:39,352 INFO L226 Difference]: Without dead ends: 739 [2021-07-13 19:31:39,353 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 298.5ms TimeCoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:31:39,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 739 states. [2021-07-13 19:31:39,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 739 to 649. [2021-07-13 19:31:39,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 649 states, 648 states have (on average 2.8410493827160495) internal successors, (1841), 648 states have internal predecessors, (1841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:31:39,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 649 states to 649 states and 1841 transitions. [2021-07-13 19:31:39,360 INFO L78 Accepts]: Start accepts. Automaton has 649 states and 1841 transitions. Word has length 17 [2021-07-13 19:31:39,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:31:39,360 INFO L482 AbstractCegarLoop]: Abstraction has 649 states and 1841 transitions. [2021-07-13 19:31:39,360 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:31:39,360 INFO L276 IsEmpty]: Start isEmpty. Operand 649 states and 1841 transitions. [2021-07-13 19:31:39,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:31:39,361 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:31:39,361 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:31:39,561 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1628,227 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:31:39,562 INFO L430 AbstractCegarLoop]: === Iteration 237 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:31:39,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:31:39,562 INFO L82 PathProgramCache]: Analyzing trace with hash -708639526, now seen corresponding path program 223 times [2021-07-13 19:31:39,562 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:31:39,562 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521875435] [2021-07-13 19:31:39,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:31:39,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:31:39,618 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:31:39,618 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:31:39,618 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521875435] [2021-07-13 19:31:39,618 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521875435] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:31:39,618 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [915988528] [2021-07-13 19:31:39,618 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:31:39,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:31:39,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 19:31:39,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:31:39,767 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:31:39,767 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:31:39,768 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:31:39,768 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:31:39,770 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:31:39,771 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:31:39,771 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:31:39,792 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-07-13 19:31:39,793 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:31:39,793 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:31:39,793 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-07-13 19:31:39,812 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:31:39,813 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [915988528] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:31:39,813 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:31:39,813 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 17 [2021-07-13 19:31:39,813 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053291616] [2021-07-13 19:31:39,813 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:31:39,813 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:31:39,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:31:39,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:31:39,813 INFO L87 Difference]: Start difference. First operand 649 states and 1841 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:31:40,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:31:40,019 INFO L93 Difference]: Finished difference Result 760 states and 2046 transitions. [2021-07-13 19:31:40,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:31:40,019 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:31:40,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:31:40,020 INFO L225 Difference]: With dead ends: 760 [2021-07-13 19:31:40,020 INFO L226 Difference]: Without dead ends: 760 [2021-07-13 19:31:40,020 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 147.4ms TimeCoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:31:40,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 760 states. [2021-07-13 19:31:40,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 760 to 649. [2021-07-13 19:31:40,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 649 states, 648 states have (on average 2.8410493827160495) internal successors, (1841), 648 states have internal predecessors, (1841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:31:40,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 649 states to 649 states and 1841 transitions. [2021-07-13 19:31:40,027 INFO L78 Accepts]: Start accepts. Automaton has 649 states and 1841 transitions. Word has length 17 [2021-07-13 19:31:40,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:31:40,028 INFO L482 AbstractCegarLoop]: Abstraction has 649 states and 1841 transitions. [2021-07-13 19:31:40,028 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:31:40,028 INFO L276 IsEmpty]: Start isEmpty. Operand 649 states and 1841 transitions. [2021-07-13 19:31:40,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:31:40,028 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:31:40,028 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:31:40,232 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1632,228 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:31:40,233 INFO L430 AbstractCegarLoop]: === Iteration 238 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:31:40,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:31:40,233 INFO L82 PathProgramCache]: Analyzing trace with hash -561657414, now seen corresponding path program 224 times [2021-07-13 19:31:40,233 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:31:40,233 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858721486] [2021-07-13 19:31:40,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:31:40,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:31:40,303 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:31:40,303 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:31:40,303 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858721486] [2021-07-13 19:31:40,303 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [858721486] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:31:40,303 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1039946024] [2021-07-13 19:31:40,303 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:31:40,330 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:31:40,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:31:40,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 19:31:40,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:31:40,422 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:31:40,423 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:31:40,423 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:31:40,424 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:31:40,426 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:31:40,426 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:31:40,427 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:31:40,427 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:31:40,429 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:31:40,430 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:31:40,430 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:31:40,431 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:31:40,432 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:31:40,433 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:31:40,434 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:31:40,465 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-07-13 19:31:40,465 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:31:40,473 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:31:40,473 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-07-13 19:31:40,532 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:31:40,532 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1039946024] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:31:40,532 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:31:40,532 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 17 [2021-07-13 19:31:40,532 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489494684] [2021-07-13 19:31:40,533 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:31:40,533 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:31:40,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:31:40,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:31:40,533 INFO L87 Difference]: Start difference. First operand 649 states and 1841 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:31:40,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:31:40,869 INFO L93 Difference]: Finished difference Result 689 states and 1903 transitions. [2021-07-13 19:31:40,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 19:31:40,869 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:31:40,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:31:40,870 INFO L225 Difference]: With dead ends: 689 [2021-07-13 19:31:40,870 INFO L226 Difference]: Without dead ends: 685 [2021-07-13 19:31:40,871 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 349.6ms TimeCoverageRelationStatistics Valid=96, Invalid=554, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:31:40,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 685 states. [2021-07-13 19:31:40,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 685 to 647. [2021-07-13 19:31:40,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 647 states, 646 states have (on average 2.8390092879256965) internal successors, (1834), 646 states have internal predecessors, (1834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:31:40,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 647 states to 647 states and 1834 transitions. [2021-07-13 19:31:40,878 INFO L78 Accepts]: Start accepts. Automaton has 647 states and 1834 transitions. Word has length 17 [2021-07-13 19:31:40,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:31:40,878 INFO L482 AbstractCegarLoop]: Abstraction has 647 states and 1834 transitions. [2021-07-13 19:31:40,878 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:31:40,878 INFO L276 IsEmpty]: Start isEmpty. Operand 647 states and 1834 transitions. [2021-07-13 19:31:40,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:31:40,879 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:31:40,879 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:31:41,079 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 229 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1635 [2021-07-13 19:31:41,079 INFO L430 AbstractCegarLoop]: === Iteration 239 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:31:41,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:31:41,079 INFO L82 PathProgramCache]: Analyzing trace with hash 1167389920, now seen corresponding path program 225 times [2021-07-13 19:31:41,079 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:31:41,079 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526176414] [2021-07-13 19:31:41,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:31:41,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:31:41,142 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:31:41,143 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:31:41,143 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526176414] [2021-07-13 19:31:41,143 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1526176414] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:31:41,143 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2030922429] [2021-07-13 19:31:41,143 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:31:41,170 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 19:31:41,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:31:41,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 19:31:41,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:31:41,310 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:31:41,311 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:31:41,311 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:31:41,312 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:31:41,314 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:31:41,315 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:31:41,317 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:31:41,318 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:31:41,320 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:31:41,321 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:31:41,323 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:31:41,323 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:31:41,324 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:31:41,324 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:31:41,326 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:31:41,327 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:31:41,356 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-07-13 19:31:41,356 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:31:41,357 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:31:41,357 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-07-13 19:31:41,382 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:31:41,382 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2030922429] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:31:41,382 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:31:41,382 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 17 [2021-07-13 19:31:41,382 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603981188] [2021-07-13 19:31:41,382 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:31:41,382 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:31:41,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:31:41,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:31:41,383 INFO L87 Difference]: Start difference. First operand 647 states and 1834 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:31:41,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:31:41,618 INFO L93 Difference]: Finished difference Result 662 states and 1857 transitions. [2021-07-13 19:31:41,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 19:31:41,618 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:31:41,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:31:41,619 INFO L225 Difference]: With dead ends: 662 [2021-07-13 19:31:41,619 INFO L226 Difference]: Without dead ends: 654 [2021-07-13 19:31:41,619 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 272.1ms TimeCoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:31:41,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 654 states. [2021-07-13 19:31:41,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 654 to 645. [2021-07-13 19:31:41,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 645 states, 644 states have (on average 2.8338509316770186) internal successors, (1825), 644 states have internal predecessors, (1825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:31:41,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 645 states to 645 states and 1825 transitions. [2021-07-13 19:31:41,626 INFO L78 Accepts]: Start accepts. Automaton has 645 states and 1825 transitions. Word has length 17 [2021-07-13 19:31:41,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:31:41,627 INFO L482 AbstractCegarLoop]: Abstraction has 645 states and 1825 transitions. [2021-07-13 19:31:41,627 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:31:41,627 INFO L276 IsEmpty]: Start isEmpty. Operand 645 states and 1825 transitions. [2021-07-13 19:31:41,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:31:41,627 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:31:41,627 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:31:41,828 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 230 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1641 [2021-07-13 19:31:41,828 INFO L430 AbstractCegarLoop]: === Iteration 240 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:31:41,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:31:41,828 INFO L82 PathProgramCache]: Analyzing trace with hash -1096093220, now seen corresponding path program 226 times [2021-07-13 19:31:41,828 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:31:41,828 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245416180] [2021-07-13 19:31:41,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:31:41,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:31:41,906 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:31:41,907 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:31:41,907 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245416180] [2021-07-13 19:31:41,907 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [245416180] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:31:41,907 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [580838376] [2021-07-13 19:31:41,907 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:31:41,935 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:31:41,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:31:41,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 19:31:41,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:31:42,043 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:31:42,048 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:31:42,049 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:31:42,049 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:31:42,052 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:31:42,052 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:31:42,052 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:31:42,053 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:31:42,055 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:31:42,055 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:31:42,056 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:31:42,056 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:31:42,058 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:31:42,058 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:31:42,059 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:31:42,091 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-07-13 19:31:42,091 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:31:42,092 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:31:42,092 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-07-13 19:31:42,140 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:31:42,140 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [580838376] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:31:42,140 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:31:42,140 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-07-13 19:31:42,140 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873659384] [2021-07-13 19:31:42,140 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:31:42,140 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:31:42,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:31:42,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:31:42,141 INFO L87 Difference]: Start difference. First operand 645 states and 1825 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:31:42,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:31:42,438 INFO L93 Difference]: Finished difference Result 828 states and 2196 transitions. [2021-07-13 19:31:42,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:31:42,438 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:31:42,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:31:42,439 INFO L225 Difference]: With dead ends: 828 [2021-07-13 19:31:42,439 INFO L226 Difference]: Without dead ends: 827 [2021-07-13 19:31:42,439 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 299.9ms TimeCoverageRelationStatistics Valid=81, Invalid=471, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:31:42,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 827 states. [2021-07-13 19:31:42,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 827 to 694. [2021-07-13 19:31:42,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 694 states, 693 states have (on average 2.8715728715728717) internal successors, (1990), 693 states have internal predecessors, (1990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:31:42,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 694 states to 694 states and 1990 transitions. [2021-07-13 19:31:42,448 INFO L78 Accepts]: Start accepts. Automaton has 694 states and 1990 transitions. Word has length 17 [2021-07-13 19:31:42,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:31:42,448 INFO L482 AbstractCegarLoop]: Abstraction has 694 states and 1990 transitions. [2021-07-13 19:31:42,448 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:31:42,448 INFO L276 IsEmpty]: Start isEmpty. Operand 694 states and 1990 transitions. [2021-07-13 19:31:42,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:31:42,449 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:31:42,449 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:31:42,649 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 231 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1648 [2021-07-13 19:31:42,649 INFO L430 AbstractCegarLoop]: === Iteration 241 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:31:42,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:31:42,649 INFO L82 PathProgramCache]: Analyzing trace with hash -294476992, now seen corresponding path program 227 times [2021-07-13 19:31:42,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:31:42,649 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523688095] [2021-07-13 19:31:42,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:31:42,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:31:42,725 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:31:42,725 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:31:42,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523688095] [2021-07-13 19:31:42,726 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [523688095] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:31:42,726 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1365636347] [2021-07-13 19:31:42,726 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:31:42,753 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:31:42,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:31:42,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 19:31:42,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:31:42,860 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:31:42,861 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:31:42,861 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:31:42,862 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:31:42,864 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:31:42,864 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:31:42,864 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:31:42,865 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:31:42,867 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:31:42,867 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:31:42,868 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:31:42,868 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:31:42,870 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:31:42,870 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:31:42,871 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:31:42,903 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-07-13 19:31:42,903 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:31:42,904 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:31:42,904 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-07-13 19:31:42,976 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:31:42,976 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1365636347] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:31:42,976 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:31:42,976 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-07-13 19:31:42,976 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679957492] [2021-07-13 19:31:42,976 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:31:42,976 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:31:42,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:31:42,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:31:42,977 INFO L87 Difference]: Start difference. First operand 694 states and 1990 transitions. Second operand has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:31:43,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:31:43,626 INFO L93 Difference]: Finished difference Result 821 states and 2194 transitions. [2021-07-13 19:31:43,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-13 19:31:43,627 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:31:43,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:31:43,628 INFO L225 Difference]: With dead ends: 821 [2021-07-13 19:31:43,628 INFO L226 Difference]: Without dead ends: 813 [2021-07-13 19:31:43,628 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 562.6ms TimeCoverageRelationStatistics Valid=144, Invalid=978, Unknown=0, NotChecked=0, Total=1122 [2021-07-13 19:31:43,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 813 states. [2021-07-13 19:31:43,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 813 to 705. [2021-07-13 19:31:43,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 705 states, 704 states have (on average 2.875) internal successors, (2024), 704 states have internal predecessors, (2024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:31:43,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 705 states to 705 states and 2024 transitions. [2021-07-13 19:31:43,636 INFO L78 Accepts]: Start accepts. Automaton has 705 states and 2024 transitions. Word has length 17 [2021-07-13 19:31:43,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:31:43,636 INFO L482 AbstractCegarLoop]: Abstraction has 705 states and 2024 transitions. [2021-07-13 19:31:43,636 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:31:43,636 INFO L276 IsEmpty]: Start isEmpty. Operand 705 states and 2024 transitions. [2021-07-13 19:31:43,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:31:43,637 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:31:43,637 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:31:43,837 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 232 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1652 [2021-07-13 19:31:43,838 INFO L430 AbstractCegarLoop]: === Iteration 242 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:31:43,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:31:43,838 INFO L82 PathProgramCache]: Analyzing trace with hash 1423866714, now seen corresponding path program 228 times [2021-07-13 19:31:43,838 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:31:43,838 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016104693] [2021-07-13 19:31:43,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:31:43,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:31:43,921 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:31:43,922 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:31:43,922 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016104693] [2021-07-13 19:31:43,922 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1016104693] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:31:43,922 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1923496330] [2021-07-13 19:31:43,922 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:31:43,949 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:31:43,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:31:43,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 19:31:43,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:31:44,056 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:31:44,057 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:31:44,057 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:31:44,058 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:31:44,060 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:31:44,060 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:31:44,060 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:31:44,061 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:31:44,063 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:31:44,063 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:31:44,064 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:31:44,064 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:31:44,066 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:31:44,067 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:31:44,067 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:31:44,099 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-07-13 19:31:44,099 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:31:44,100 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:31:44,100 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-07-13 19:31:44,147 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:31:44,147 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1923496330] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:31:44,147 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:31:44,147 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-07-13 19:31:44,147 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184292685] [2021-07-13 19:31:44,147 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:31:44,147 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:31:44,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:31:44,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:31:44,148 INFO L87 Difference]: Start difference. First operand 705 states and 2024 transitions. Second operand has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:31:44,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:31:44,550 INFO L93 Difference]: Finished difference Result 803 states and 2170 transitions. [2021-07-13 19:31:44,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 19:31:44,550 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:31:44,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:31:44,551 INFO L225 Difference]: With dead ends: 803 [2021-07-13 19:31:44,551 INFO L226 Difference]: Without dead ends: 803 [2021-07-13 19:31:44,551 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 382.3ms TimeCoverageRelationStatistics Valid=105, Invalid=597, Unknown=0, NotChecked=0, Total=702 [2021-07-13 19:31:44,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 803 states. [2021-07-13 19:31:44,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 803 to 697. [2021-07-13 19:31:44,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 697 states, 696 states have (on average 2.8620689655172415) internal successors, (1992), 696 states have internal predecessors, (1992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:31:44,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 697 states to 697 states and 1992 transitions. [2021-07-13 19:31:44,559 INFO L78 Accepts]: Start accepts. Automaton has 697 states and 1992 transitions. Word has length 17 [2021-07-13 19:31:44,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:31:44,559 INFO L482 AbstractCegarLoop]: Abstraction has 697 states and 1992 transitions. [2021-07-13 19:31:44,559 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:31:44,560 INFO L276 IsEmpty]: Start isEmpty. Operand 697 states and 1992 transitions. [2021-07-13 19:31:44,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:31:44,560 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:31:44,560 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:31:44,761 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 233 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1657 [2021-07-13 19:31:44,761 INFO L430 AbstractCegarLoop]: === Iteration 243 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:31:44,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:31:44,761 INFO L82 PathProgramCache]: Analyzing trace with hash -286746594, now seen corresponding path program 229 times [2021-07-13 19:31:44,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:31:44,761 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976986081] [2021-07-13 19:31:44,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:31:44,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:31:44,843 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:31:44,843 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:31:44,843 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976986081] [2021-07-13 19:31:44,843 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1976986081] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:31:44,843 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [827509004] [2021-07-13 19:31:44,843 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:31:44,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:31:44,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 19:31:44,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:31:45,002 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:31:45,002 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:31:45,003 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:31:45,003 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:31:45,006 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:31:45,006 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:31:45,006 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:31:45,028 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-07-13 19:31:45,028 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:31:45,029 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:31:45,029 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-07-13 19:31:45,048 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:31:45,049 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [827509004] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:31:45,049 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:31:45,049 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-07-13 19:31:45,049 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245551746] [2021-07-13 19:31:45,049 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:31:45,049 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:31:45,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:31:45,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:31:45,049 INFO L87 Difference]: Start difference. First operand 697 states and 1992 transitions. Second operand has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:31:45,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:31:45,533 INFO L93 Difference]: Finished difference Result 840 states and 2242 transitions. [2021-07-13 19:31:45,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 19:31:45,534 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:31:45,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:31:45,535 INFO L225 Difference]: With dead ends: 840 [2021-07-13 19:31:45,535 INFO L226 Difference]: Without dead ends: 840 [2021-07-13 19:31:45,535 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 410.5ms TimeCoverageRelationStatistics Valid=122, Invalid=748, Unknown=0, NotChecked=0, Total=870 [2021-07-13 19:31:45,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 840 states. [2021-07-13 19:31:45,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 840 to 689. [2021-07-13 19:31:45,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 689 states, 688 states have (on average 2.854651162790698) internal successors, (1964), 688 states have internal predecessors, (1964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:31:45,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 689 states to 689 states and 1964 transitions. [2021-07-13 19:31:45,548 INFO L78 Accepts]: Start accepts. Automaton has 689 states and 1964 transitions. Word has length 17 [2021-07-13 19:31:45,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:31:45,548 INFO L482 AbstractCegarLoop]: Abstraction has 689 states and 1964 transitions. [2021-07-13 19:31:45,549 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:31:45,549 INFO L276 IsEmpty]: Start isEmpty. Operand 689 states and 1964 transitions. [2021-07-13 19:31:45,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:31:45,549 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:31:45,549 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:31:45,750 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 234 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1661 [2021-07-13 19:31:45,750 INFO L430 AbstractCegarLoop]: === Iteration 244 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:31:45,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:31:45,750 INFO L82 PathProgramCache]: Analyzing trace with hash -1776151590, now seen corresponding path program 230 times [2021-07-13 19:31:45,750 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:31:45,750 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321316311] [2021-07-13 19:31:45,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:31:45,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:31:45,817 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:31:45,817 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:31:45,817 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321316311] [2021-07-13 19:31:45,817 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1321316311] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:31:45,817 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1113022368] [2021-07-13 19:31:45,817 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:31:45,845 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:31:45,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:31:45,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 19:31:45,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:31:45,993 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:31:45,994 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:31:45,994 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:31:45,995 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:31:45,997 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:31:45,997 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:31:45,998 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:31:46,021 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-07-13 19:31:46,021 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:31:46,022 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:31:46,022 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-07-13 19:31:46,041 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:31:46,041 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1113022368] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:31:46,041 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:31:46,041 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-07-13 19:31:46,041 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872742190] [2021-07-13 19:31:46,042 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:31:46,042 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:31:46,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:31:46,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:31:46,042 INFO L87 Difference]: Start difference. First operand 689 states and 1964 transitions. Second operand has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:31:46,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:31:46,294 INFO L93 Difference]: Finished difference Result 790 states and 2131 transitions. [2021-07-13 19:31:46,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 19:31:46,294 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:31:46,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:31:46,295 INFO L225 Difference]: With dead ends: 790 [2021-07-13 19:31:46,295 INFO L226 Difference]: Without dead ends: 790 [2021-07-13 19:31:46,295 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 173.6ms TimeCoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:31:46,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 790 states. [2021-07-13 19:31:46,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 790 to 690. [2021-07-13 19:31:46,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 690 states, 689 states have (on average 2.856313497822932) internal successors, (1968), 689 states have internal predecessors, (1968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:31:46,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 690 states to 690 states and 1968 transitions. [2021-07-13 19:31:46,303 INFO L78 Accepts]: Start accepts. Automaton has 690 states and 1968 transitions. Word has length 17 [2021-07-13 19:31:46,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:31:46,303 INFO L482 AbstractCegarLoop]: Abstraction has 690 states and 1968 transitions. [2021-07-13 19:31:46,303 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:31:46,303 INFO L276 IsEmpty]: Start isEmpty. Operand 690 states and 1968 transitions. [2021-07-13 19:31:46,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:31:46,304 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:31:46,304 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:31:46,504 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 235 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1664 [2021-07-13 19:31:46,505 INFO L430 AbstractCegarLoop]: === Iteration 245 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:31:46,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:31:46,505 INFO L82 PathProgramCache]: Analyzing trace with hash 1799298558, now seen corresponding path program 231 times [2021-07-13 19:31:46,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:31:46,505 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976693257] [2021-07-13 19:31:46,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:31:46,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:31:46,585 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:31:46,585 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:31:46,585 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976693257] [2021-07-13 19:31:46,585 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1976693257] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:31:46,585 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [500221895] [2021-07-13 19:31:46,585 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:31:46,612 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:31:46,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:31:46,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 19:31:46,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:31:46,725 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:31:46,726 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:31:46,726 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:31:46,727 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:31:46,729 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:31:46,729 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:31:46,729 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:31:46,730 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:31:46,732 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:31:46,732 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:31:46,733 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:31:46,733 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:31:46,735 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:31:46,735 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:31:46,736 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:31:46,768 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-07-13 19:31:46,768 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:31:46,769 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:31:46,769 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-07-13 19:31:46,829 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:31:46,829 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [500221895] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:31:46,830 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:31:46,830 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-07-13 19:31:46,830 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520421172] [2021-07-13 19:31:46,830 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:31:46,830 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:31:46,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:31:46,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:31:46,830 INFO L87 Difference]: Start difference. First operand 690 states and 1968 transitions. Second operand has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:31:47,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:31:47,112 INFO L93 Difference]: Finished difference Result 733 states and 2033 transitions. [2021-07-13 19:31:47,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:31:47,112 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:31:47,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:31:47,113 INFO L225 Difference]: With dead ends: 733 [2021-07-13 19:31:47,113 INFO L226 Difference]: Without dead ends: 729 [2021-07-13 19:31:47,114 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 343.4ms TimeCoverageRelationStatistics Valid=86, Invalid=514, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:31:47,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 729 states. [2021-07-13 19:31:47,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 729 to 687. [2021-07-13 19:31:47,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 687 states, 686 states have (on average 2.8542274052478134) internal successors, (1958), 686 states have internal predecessors, (1958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:31:47,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 687 states to 687 states and 1958 transitions. [2021-07-13 19:31:47,122 INFO L78 Accepts]: Start accepts. Automaton has 687 states and 1958 transitions. Word has length 17 [2021-07-13 19:31:47,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:31:47,122 INFO L482 AbstractCegarLoop]: Abstraction has 687 states and 1958 transitions. [2021-07-13 19:31:47,122 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:31:47,122 INFO L276 IsEmpty]: Start isEmpty. Operand 687 states and 1958 transitions. [2021-07-13 19:31:47,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:31:47,123 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:31:47,123 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:31:47,323 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1667,236 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:31:47,323 INFO L430 AbstractCegarLoop]: === Iteration 246 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:31:47,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:31:47,323 INFO L82 PathProgramCache]: Analyzing trace with hash -766621404, now seen corresponding path program 232 times [2021-07-13 19:31:47,323 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:31:47,323 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925744258] [2021-07-13 19:31:47,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:31:47,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:31:47,394 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:31:47,394 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:31:47,394 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925744258] [2021-07-13 19:31:47,395 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1925744258] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:31:47,395 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1078369437] [2021-07-13 19:31:47,395 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:31:47,421 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:31:47,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:31:47,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 19:31:47,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:31:47,585 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:31:47,585 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:31:47,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:31:47,587 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:31:47,589 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:31:47,590 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:31:47,592 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:31:47,593 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:31:47,595 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:31:47,596 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:31:47,598 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:31:47,598 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:31:47,599 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:31:47,600 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:31:47,601 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:31:47,602 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:31:47,631 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-07-13 19:31:47,631 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:31:47,632 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:31:47,632 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-07-13 19:31:47,657 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:31:47,657 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1078369437] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:31:47,657 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:31:47,657 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-07-13 19:31:47,657 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284607403] [2021-07-13 19:31:47,657 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:31:47,657 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:31:47,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:31:47,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:31:47,658 INFO L87 Difference]: Start difference. First operand 687 states and 1958 transitions. Second operand has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:31:47,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:31:47,918 INFO L93 Difference]: Finished difference Result 733 states and 2026 transitions. [2021-07-13 19:31:47,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 19:31:47,918 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:31:47,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:31:47,919 INFO L225 Difference]: With dead ends: 733 [2021-07-13 19:31:47,919 INFO L226 Difference]: Without dead ends: 725 [2021-07-13 19:31:47,919 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 343.7ms TimeCoverageRelationStatistics Valid=88, Invalid=562, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:31:47,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 725 states. [2021-07-13 19:31:47,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 725 to 685. [2021-07-13 19:31:47,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 685 states, 684 states have (on average 2.8523391812865495) internal successors, (1951), 684 states have internal predecessors, (1951), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:31:47,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 685 states to 685 states and 1951 transitions. [2021-07-13 19:31:47,927 INFO L78 Accepts]: Start accepts. Automaton has 685 states and 1951 transitions. Word has length 17 [2021-07-13 19:31:47,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:31:47,927 INFO L482 AbstractCegarLoop]: Abstraction has 685 states and 1951 transitions. [2021-07-13 19:31:47,927 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:31:47,927 INFO L276 IsEmpty]: Start isEmpty. Operand 685 states and 1951 transitions. [2021-07-13 19:31:47,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:31:47,928 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:31:47,928 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:31:48,128 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 237 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1673 [2021-07-13 19:31:48,129 INFO L430 AbstractCegarLoop]: === Iteration 247 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:31:48,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:31:48,129 INFO L82 PathProgramCache]: Analyzing trace with hash 1294238398, now seen corresponding path program 233 times [2021-07-13 19:31:48,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:31:48,129 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548630910] [2021-07-13 19:31:48,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:31:48,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:31:48,194 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:31:48,194 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:31:48,194 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548630910] [2021-07-13 19:31:48,194 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548630910] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:31:48,194 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1683914843] [2021-07-13 19:31:48,194 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:31:48,222 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:31:48,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:31:48,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 19:31:48,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:31:48,385 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:31:48,386 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:31:48,386 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:31:48,387 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:31:48,389 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:31:48,390 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:31:48,392 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:31:48,393 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:31:48,395 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:31:48,396 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:31:48,399 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:31:48,399 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:31:48,400 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:31:48,400 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:31:48,402 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:31:48,403 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:31:48,445 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-07-13 19:31:48,446 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:31:48,447 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:31:48,447 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-07-13 19:31:48,473 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:31:48,474 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1683914843] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:31:48,474 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:31:48,474 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-07-13 19:31:48,474 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545629160] [2021-07-13 19:31:48,474 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:31:48,474 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:31:48,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:31:48,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:31:48,474 INFO L87 Difference]: Start difference. First operand 685 states and 1951 transitions. Second operand has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:31:48,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:31:48,776 INFO L93 Difference]: Finished difference Result 718 states and 1996 transitions. [2021-07-13 19:31:48,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:31:48,776 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:31:48,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:31:48,777 INFO L225 Difference]: With dead ends: 718 [2021-07-13 19:31:48,777 INFO L226 Difference]: Without dead ends: 706 [2021-07-13 19:31:48,777 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 340.8ms TimeCoverageRelationStatistics Valid=86, Invalid=564, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:31:48,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 706 states. [2021-07-13 19:31:48,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 706 to 684. [2021-07-13 19:31:48,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 684 states, 683 states have (on average 2.8506588579795022) internal successors, (1947), 683 states have internal predecessors, (1947), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:31:48,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 684 states to 684 states and 1947 transitions. [2021-07-13 19:31:48,785 INFO L78 Accepts]: Start accepts. Automaton has 684 states and 1947 transitions. Word has length 17 [2021-07-13 19:31:48,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:31:48,785 INFO L482 AbstractCegarLoop]: Abstraction has 684 states and 1947 transitions. [2021-07-13 19:31:48,785 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:31:48,785 INFO L276 IsEmpty]: Start isEmpty. Operand 684 states and 1947 transitions. [2021-07-13 19:31:48,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:31:48,786 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:31:48,786 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:31:48,986 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1680,238 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:31:48,986 INFO L430 AbstractCegarLoop]: === Iteration 248 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:31:48,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:31:48,987 INFO L82 PathProgramCache]: Analyzing trace with hash -902314216, now seen corresponding path program 234 times [2021-07-13 19:31:48,987 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:31:48,987 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492165161] [2021-07-13 19:31:48,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:31:48,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:31:49,094 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:31:49,094 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:31:49,094 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492165161] [2021-07-13 19:31:49,094 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1492165161] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:31:49,094 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1310803258] [2021-07-13 19:31:49,094 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:31:49,122 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:31:49,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:31:49,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 19:31:49,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:31:49,245 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:31:49,245 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:31:49,245 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:31:49,246 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:31:49,248 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:31:49,249 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:31:49,249 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:31:49,249 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:31:49,252 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:31:49,252 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:31:49,252 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:31:49,253 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:31:49,255 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:31:49,255 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:31:49,256 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:31:49,288 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-07-13 19:31:49,288 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:31:49,288 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:31:49,288 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-07-13 19:31:49,339 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:31:49,340 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1310803258] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:31:49,340 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:31:49,340 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-13 19:31:49,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916855126] [2021-07-13 19:31:49,340 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:31:49,340 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:31:49,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:31:49,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:31:49,340 INFO L87 Difference]: Start difference. First operand 684 states and 1947 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:31:49,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:31:49,682 INFO L93 Difference]: Finished difference Result 854 states and 2269 transitions. [2021-07-13 19:31:49,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:31:49,682 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:31:49,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:31:49,683 INFO L225 Difference]: With dead ends: 854 [2021-07-13 19:31:49,683 INFO L226 Difference]: Without dead ends: 854 [2021-07-13 19:31:49,683 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 397.5ms TimeCoverageRelationStatistics Valid=90, Invalid=560, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:31:49,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 854 states. [2021-07-13 19:31:49,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 854 to 711. [2021-07-13 19:31:49,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 711 states, 710 states have (on average 2.876056338028169) internal successors, (2042), 710 states have internal predecessors, (2042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:31:49,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 711 states to 711 states and 2042 transitions. [2021-07-13 19:31:49,692 INFO L78 Accepts]: Start accepts. Automaton has 711 states and 2042 transitions. Word has length 17 [2021-07-13 19:31:49,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:31:49,692 INFO L482 AbstractCegarLoop]: Abstraction has 711 states and 2042 transitions. [2021-07-13 19:31:49,692 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:31:49,692 INFO L276 IsEmpty]: Start isEmpty. Operand 711 states and 2042 transitions. [2021-07-13 19:31:49,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:31:49,693 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:31:49,693 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:31:49,893 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 239 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1687 [2021-07-13 19:31:49,893 INFO L430 AbstractCegarLoop]: === Iteration 249 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:31:49,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:31:49,893 INFO L82 PathProgramCache]: Analyzing trace with hash -100697988, now seen corresponding path program 235 times [2021-07-13 19:31:49,894 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:31:49,894 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972367388] [2021-07-13 19:31:49,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:31:49,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:31:49,987 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:31:49,987 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:31:49,987 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972367388] [2021-07-13 19:31:49,987 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [972367388] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:31:49,987 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1320420770] [2021-07-13 19:31:49,987 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:31:50,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:31:50,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 19:31:50,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:31:50,138 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:31:50,138 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:31:50,138 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:31:50,139 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:31:50,141 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:31:50,142 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:31:50,142 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:31:50,142 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:31:50,144 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:31:50,145 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:31:50,145 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:31:50,146 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:31:50,148 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:31:50,148 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:31:50,149 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:31:50,181 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-07-13 19:31:50,181 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:31:50,182 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:31:50,182 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-07-13 19:31:50,251 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:31:50,251 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1320420770] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:31:50,251 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:31:50,251 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-13 19:31:50,251 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197677778] [2021-07-13 19:31:50,251 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:31:50,251 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:31:50,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:31:50,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:31:50,252 INFO L87 Difference]: Start difference. First operand 711 states and 2042 transitions. Second operand has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:31:51,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:31:51,180 INFO L93 Difference]: Finished difference Result 893 states and 2372 transitions. [2021-07-13 19:31:51,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-13 19:31:51,180 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:31:51,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:31:51,181 INFO L225 Difference]: With dead ends: 893 [2021-07-13 19:31:51,181 INFO L226 Difference]: Without dead ends: 882 [2021-07-13 19:31:51,182 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 430 ImplicationChecksByTransitivity, 892.8ms TimeCoverageRelationStatistics Valid=216, Invalid=1590, Unknown=0, NotChecked=0, Total=1806 [2021-07-13 19:31:51,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 882 states. [2021-07-13 19:31:51,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 882 to 733. [2021-07-13 19:31:51,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 733 states, 732 states have (on average 2.8948087431693987) internal successors, (2119), 732 states have internal predecessors, (2119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:31:51,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 733 states to 733 states and 2119 transitions. [2021-07-13 19:31:51,190 INFO L78 Accepts]: Start accepts. Automaton has 733 states and 2119 transitions. Word has length 17 [2021-07-13 19:31:51,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:31:51,190 INFO L482 AbstractCegarLoop]: Abstraction has 733 states and 2119 transitions. [2021-07-13 19:31:51,190 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:31:51,191 INFO L276 IsEmpty]: Start isEmpty. Operand 733 states and 2119 transitions. [2021-07-13 19:31:51,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:31:51,191 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:31:51,191 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:31:51,392 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1691,240 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:31:51,392 INFO L430 AbstractCegarLoop]: === Iteration 250 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:31:51,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:31:51,392 INFO L82 PathProgramCache]: Analyzing trace with hash 1617645718, now seen corresponding path program 236 times [2021-07-13 19:31:51,392 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:31:51,392 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901165352] [2021-07-13 19:31:51,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:31:51,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:31:51,484 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:31:51,484 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:31:51,484 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901165352] [2021-07-13 19:31:51,484 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [901165352] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:31:51,484 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1529454208] [2021-07-13 19:31:51,484 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:31:51,512 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:31:51,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:31:51,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 19:31:51,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:31:51,635 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:31:51,636 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:31:51,636 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:31:51,637 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:31:51,639 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:31:51,639 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:31:51,640 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:31:51,640 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:31:51,642 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:31:51,643 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:31:51,643 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:31:51,643 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:31:51,645 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:31:51,646 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:31:51,647 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:31:51,676 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-07-13 19:31:51,676 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:31:51,677 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:31:51,677 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-07-13 19:31:51,723 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:31:51,723 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1529454208] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:31:51,723 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:31:51,723 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-13 19:31:51,724 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405274965] [2021-07-13 19:31:51,724 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:31:51,724 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:31:51,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:31:51,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:31:51,724 INFO L87 Difference]: Start difference. First operand 733 states and 2119 transitions. Second operand has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:31:52,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:31:52,252 INFO L93 Difference]: Finished difference Result 885 states and 2372 transitions. [2021-07-13 19:31:52,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 19:31:52,252 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:31:52,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:31:52,254 INFO L225 Difference]: With dead ends: 885 [2021-07-13 19:31:52,254 INFO L226 Difference]: Without dead ends: 885 [2021-07-13 19:31:52,254 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 514.8ms TimeCoverageRelationStatistics Valid=146, Invalid=846, Unknown=0, NotChecked=0, Total=992 [2021-07-13 19:31:52,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 885 states. [2021-07-13 19:31:52,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 885 to 743. [2021-07-13 19:31:52,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 743 states, 742 states have (on average 2.881401617250674) internal successors, (2138), 742 states have internal predecessors, (2138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:31:52,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 743 states to 743 states and 2138 transitions. [2021-07-13 19:31:52,263 INFO L78 Accepts]: Start accepts. Automaton has 743 states and 2138 transitions. Word has length 17 [2021-07-13 19:31:52,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:31:52,263 INFO L482 AbstractCegarLoop]: Abstraction has 743 states and 2138 transitions. [2021-07-13 19:31:52,263 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:31:52,263 INFO L276 IsEmpty]: Start isEmpty. Operand 743 states and 2138 transitions. [2021-07-13 19:31:52,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:31:52,264 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:31:52,264 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:31:52,468 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 241 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1696 [2021-07-13 19:31:52,469 INFO L430 AbstractCegarLoop]: === Iteration 251 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:31:52,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:31:52,469 INFO L82 PathProgramCache]: Analyzing trace with hash -92967590, now seen corresponding path program 237 times [2021-07-13 19:31:52,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:31:52,469 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315608076] [2021-07-13 19:31:52,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:31:52,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:31:52,553 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:31:52,553 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:31:52,553 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315608076] [2021-07-13 19:31:52,553 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [315608076] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:31:52,554 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1843730591] [2021-07-13 19:31:52,554 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:31:52,581 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 19:31:52,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:31:52,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 19:31:52,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:31:52,734 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:31:52,735 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:31:52,735 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:31:52,736 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:31:52,738 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:31:52,738 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:31:52,739 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:31:52,760 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-07-13 19:31:52,760 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:31:52,761 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:31:52,761 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-07-13 19:31:52,782 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:31:52,782 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1843730591] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:31:52,782 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:31:52,782 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-13 19:31:52,782 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14245899] [2021-07-13 19:31:52,782 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:31:52,782 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:31:52,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:31:52,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:31:52,783 INFO L87 Difference]: Start difference. First operand 743 states and 2138 transitions. Second operand has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:31:53,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:31:53,541 INFO L93 Difference]: Finished difference Result 925 states and 2443 transitions. [2021-07-13 19:31:53,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-13 19:31:53,541 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:31:53,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:31:53,543 INFO L225 Difference]: With dead ends: 925 [2021-07-13 19:31:53,543 INFO L226 Difference]: Without dead ends: 925 [2021-07-13 19:31:53,543 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 338 ImplicationChecksByTransitivity, 687.8ms TimeCoverageRelationStatistics Valid=185, Invalid=1375, Unknown=0, NotChecked=0, Total=1560 [2021-07-13 19:31:53,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 925 states. [2021-07-13 19:31:53,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 925 to 740. [2021-07-13 19:31:53,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 740 states, 739 states have (on average 2.8687415426251692) internal successors, (2120), 739 states have internal predecessors, (2120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:31:53,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 740 states to 740 states and 2120 transitions. [2021-07-13 19:31:53,552 INFO L78 Accepts]: Start accepts. Automaton has 740 states and 2120 transitions. Word has length 17 [2021-07-13 19:31:53,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:31:53,552 INFO L482 AbstractCegarLoop]: Abstraction has 740 states and 2120 transitions. [2021-07-13 19:31:53,552 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:31:53,552 INFO L276 IsEmpty]: Start isEmpty. Operand 740 states and 2120 transitions. [2021-07-13 19:31:53,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:31:53,553 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:31:53,553 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:31:53,753 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1700,242 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:31:53,753 INFO L430 AbstractCegarLoop]: === Iteration 252 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:31:53,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:31:53,754 INFO L82 PathProgramCache]: Analyzing trace with hash -1582372586, now seen corresponding path program 238 times [2021-07-13 19:31:53,754 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:31:53,754 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966670230] [2021-07-13 19:31:53,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:31:53,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:31:53,835 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:31:53,836 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:31:53,836 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966670230] [2021-07-13 19:31:53,836 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [966670230] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:31:53,836 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1953664656] [2021-07-13 19:31:53,836 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:31:53,869 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:31:53,869 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:31:53,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 19:31:53,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:31:54,028 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:31:54,029 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:31:54,029 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:31:54,030 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:31:54,032 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:31:54,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:31:54,033 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:31:54,054 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-07-13 19:31:54,054 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:31:54,055 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:31:54,055 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-07-13 19:31:54,076 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:31:54,076 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1953664656] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:31:54,076 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:31:54,076 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-13 19:31:54,076 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022847158] [2021-07-13 19:31:54,076 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:31:54,076 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:31:54,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:31:54,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:31:54,077 INFO L87 Difference]: Start difference. First operand 740 states and 2120 transitions. Second operand has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:31:55,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:31:55,088 INFO L93 Difference]: Finished difference Result 999 states and 2576 transitions. [2021-07-13 19:31:55,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-07-13 19:31:55,088 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:31:55,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:31:55,090 INFO L225 Difference]: With dead ends: 999 [2021-07-13 19:31:55,090 INFO L226 Difference]: Without dead ends: 999 [2021-07-13 19:31:55,090 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 580 ImplicationChecksByTransitivity, 850.1ms TimeCoverageRelationStatistics Valid=279, Invalid=1977, Unknown=0, NotChecked=0, Total=2256 [2021-07-13 19:31:55,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 999 states. [2021-07-13 19:31:55,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 999 to 734. [2021-07-13 19:31:55,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 734 states, 733 states have (on average 2.8663028649386084) internal successors, (2101), 733 states have internal predecessors, (2101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:31:55,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 734 states to 734 states and 2101 transitions. [2021-07-13 19:31:55,099 INFO L78 Accepts]: Start accepts. Automaton has 734 states and 2101 transitions. Word has length 17 [2021-07-13 19:31:55,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:31:55,099 INFO L482 AbstractCegarLoop]: Abstraction has 734 states and 2101 transitions. [2021-07-13 19:31:55,099 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:31:55,099 INFO L276 IsEmpty]: Start isEmpty. Operand 734 states and 2101 transitions. [2021-07-13 19:31:55,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:31:55,100 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:31:55,100 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:31:55,300 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 243 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1703 [2021-07-13 19:31:55,300 INFO L430 AbstractCegarLoop]: === Iteration 253 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:31:55,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:31:55,301 INFO L82 PathProgramCache]: Analyzing trace with hash -509287206, now seen corresponding path program 239 times [2021-07-13 19:31:55,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:31:55,301 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582199335] [2021-07-13 19:31:55,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:31:55,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:31:55,379 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:31:55,379 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:31:55,379 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582199335] [2021-07-13 19:31:55,379 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1582199335] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:31:55,379 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2043370927] [2021-07-13 19:31:55,379 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:31:55,407 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:31:55,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:31:55,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 19:31:55,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:31:55,559 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:31:55,559 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:31:55,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:31:55,560 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:31:55,563 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:31:55,563 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:31:55,563 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:31:55,584 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-07-13 19:31:55,584 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:31:55,585 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:31:55,585 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-07-13 19:31:55,606 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:31:55,606 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2043370927] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:31:55,606 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:31:55,606 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-13 19:31:55,606 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542888702] [2021-07-13 19:31:55,606 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:31:55,606 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:31:55,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:31:55,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:31:55,606 INFO L87 Difference]: Start difference. First operand 734 states and 2101 transitions. Second operand has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:31:55,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:31:55,794 INFO L93 Difference]: Finished difference Result 850 states and 2297 transitions. [2021-07-13 19:31:55,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:31:55,794 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:31:55,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:31:55,795 INFO L225 Difference]: With dead ends: 850 [2021-07-13 19:31:55,795 INFO L226 Difference]: Without dead ends: 850 [2021-07-13 19:31:55,795 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 189.9ms TimeCoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:31:55,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 850 states. [2021-07-13 19:31:55,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 850 to 737. [2021-07-13 19:31:55,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 737 states, 736 states have (on average 2.8668478260869565) internal successors, (2110), 736 states have internal predecessors, (2110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:31:55,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 737 states to 737 states and 2110 transitions. [2021-07-13 19:31:55,803 INFO L78 Accepts]: Start accepts. Automaton has 737 states and 2110 transitions. Word has length 17 [2021-07-13 19:31:55,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:31:55,803 INFO L482 AbstractCegarLoop]: Abstraction has 737 states and 2110 transitions. [2021-07-13 19:31:55,804 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:31:55,804 INFO L276 IsEmpty]: Start isEmpty. Operand 737 states and 2110 transitions. [2021-07-13 19:31:55,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:31:55,804 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:31:55,804 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:31:56,005 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1706,244 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:31:56,005 INFO L430 AbstractCegarLoop]: === Iteration 254 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:31:56,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:31:56,005 INFO L82 PathProgramCache]: Analyzing trace with hash 879028154, now seen corresponding path program 240 times [2021-07-13 19:31:56,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:31:56,005 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537256045] [2021-07-13 19:31:56,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:31:56,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:31:56,081 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:31:56,081 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:31:56,081 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537256045] [2021-07-13 19:31:56,081 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [537256045] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:31:56,081 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1795376849] [2021-07-13 19:31:56,081 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:31:56,108 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:31:56,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:31:56,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 19:31:56,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:31:56,198 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:31:56,198 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:31:56,199 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:31:56,201 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:31:56,201 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:31:56,215 INFO L628 ElimStorePlain]: treesize reduction 27, result has 30.8 percent of original size [2021-07-13 19:31:56,215 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:31:56,216 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:31:56,216 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:53, output treesize:12 [2021-07-13 19:31:56,234 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:31:56,234 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1795376849] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:31:56,234 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:31:56,234 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-07-13 19:31:56,234 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358218033] [2021-07-13 19:31:56,235 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:31:56,235 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:31:56,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:31:56,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:31:56,235 INFO L87 Difference]: Start difference. First operand 737 states and 2110 transitions. Second operand has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:31:56,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:31:56,432 INFO L93 Difference]: Finished difference Result 1005 states and 2818 transitions. [2021-07-13 19:31:56,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:31:56,433 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:31:56,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:31:56,434 INFO L225 Difference]: With dead ends: 1005 [2021-07-13 19:31:56,434 INFO L226 Difference]: Without dead ends: 1005 [2021-07-13 19:31:56,434 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 170.3ms TimeCoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:31:56,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1005 states. [2021-07-13 19:31:56,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1005 to 736. [2021-07-13 19:31:56,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 736 states, 735 states have (on average 2.869387755102041) internal successors, (2109), 735 states have internal predecessors, (2109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:31:56,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 736 states to 736 states and 2109 transitions. [2021-07-13 19:31:56,447 INFO L78 Accepts]: Start accepts. Automaton has 736 states and 2109 transitions. Word has length 17 [2021-07-13 19:31:56,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:31:56,447 INFO L482 AbstractCegarLoop]: Abstraction has 736 states and 2109 transitions. [2021-07-13 19:31:56,447 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:31:56,447 INFO L276 IsEmpty]: Start isEmpty. Operand 736 states and 2109 transitions. [2021-07-13 19:31:56,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:31:56,448 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:31:56,448 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:31:56,648 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 245 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1709 [2021-07-13 19:31:56,649 INFO L430 AbstractCegarLoop]: === Iteration 255 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:31:56,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:31:56,649 INFO L82 PathProgramCache]: Analyzing trace with hash 744702690, now seen corresponding path program 241 times [2021-07-13 19:31:56,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:31:56,649 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415669544] [2021-07-13 19:31:56,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:31:56,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:31:56,726 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:31:56,726 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:31:56,726 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415669544] [2021-07-13 19:31:56,726 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [415669544] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:31:56,726 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1867129203] [2021-07-13 19:31:56,726 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:31:56,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:31:56,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 19:31:56,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:31:56,858 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:31:56,859 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:31:56,861 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:31:56,861 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:31:56,862 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:31:56,864 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:31:56,864 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:31:56,866 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:31:56,867 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:31:56,869 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:31:56,870 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:31:56,871 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:31:56,872 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:31:56,893 INFO L628 ElimStorePlain]: treesize reduction 26, result has 43.5 percent of original size [2021-07-13 19:31:56,893 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:31:56,894 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:31:56,894 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 2 variables, input treesize:107, output treesize:20 [2021-07-13 19:31:56,920 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:31:56,920 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1867129203] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:31:56,920 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:31:56,920 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-07-13 19:31:56,920 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396156476] [2021-07-13 19:31:56,920 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:31:56,920 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:31:56,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:31:56,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:31:56,920 INFO L87 Difference]: Start difference. First operand 736 states and 2109 transitions. Second operand has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:31:57,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:31:57,250 INFO L93 Difference]: Finished difference Result 1001 states and 2805 transitions. [2021-07-13 19:31:57,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:31:57,251 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:31:57,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:31:57,252 INFO L225 Difference]: With dead ends: 1001 [2021-07-13 19:31:57,252 INFO L226 Difference]: Without dead ends: 996 [2021-07-13 19:31:57,252 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 361.1ms TimeCoverageRelationStatistics Valid=107, Invalid=595, Unknown=0, NotChecked=0, Total=702 [2021-07-13 19:31:57,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 996 states. [2021-07-13 19:31:57,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 996 to 736. [2021-07-13 19:31:57,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 736 states, 735 states have (on average 2.8680272108843536) internal successors, (2108), 735 states have internal predecessors, (2108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:31:57,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 736 states to 736 states and 2108 transitions. [2021-07-13 19:31:57,261 INFO L78 Accepts]: Start accepts. Automaton has 736 states and 2108 transitions. Word has length 17 [2021-07-13 19:31:57,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:31:57,261 INFO L482 AbstractCegarLoop]: Abstraction has 736 states and 2108 transitions. [2021-07-13 19:31:57,261 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:31:57,261 INFO L276 IsEmpty]: Start isEmpty. Operand 736 states and 2108 transitions. [2021-07-13 19:31:57,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:31:57,262 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:31:57,262 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:31:57,465 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1711,246 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:31:57,465 INFO L430 AbstractCegarLoop]: === Iteration 256 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:31:57,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:31:57,465 INFO L82 PathProgramCache]: Analyzing trace with hash -773925220, now seen corresponding path program 242 times [2021-07-13 19:31:57,466 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:31:57,466 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915741781] [2021-07-13 19:31:57,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:31:57,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:31:57,549 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:31:57,549 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:31:57,549 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915741781] [2021-07-13 19:31:57,549 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1915741781] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:31:57,549 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1253542810] [2021-07-13 19:31:57,549 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:31:57,576 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:31:57,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:31:57,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 19:31:57,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:31:57,702 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:31:57,702 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:31:57,703 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:31:57,703 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:31:57,705 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:31:57,706 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:31:57,706 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:31:57,727 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-07-13 19:31:57,727 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:31:57,728 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:31:57,728 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-07-13 19:31:57,747 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:31:57,748 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1253542810] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:31:57,748 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:31:57,748 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-13 19:31:57,748 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389987224] [2021-07-13 19:31:57,748 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:31:57,748 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:31:57,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:31:57,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:31:57,748 INFO L87 Difference]: Start difference. First operand 736 states and 2108 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:31:57,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:31:57,935 INFO L93 Difference]: Finished difference Result 1006 states and 2820 transitions. [2021-07-13 19:31:57,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:31:57,937 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:31:57,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:31:57,938 INFO L225 Difference]: With dead ends: 1006 [2021-07-13 19:31:57,938 INFO L226 Difference]: Without dead ends: 1006 [2021-07-13 19:31:57,938 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 172.6ms TimeCoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:31:57,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1006 states. [2021-07-13 19:31:57,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1006 to 737. [2021-07-13 19:31:57,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 737 states, 736 states have (on average 2.8682065217391304) internal successors, (2111), 736 states have internal predecessors, (2111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:31:57,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 737 states to 737 states and 2111 transitions. [2021-07-13 19:31:57,947 INFO L78 Accepts]: Start accepts. Automaton has 737 states and 2111 transitions. Word has length 17 [2021-07-13 19:31:57,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:31:57,947 INFO L482 AbstractCegarLoop]: Abstraction has 737 states and 2111 transitions. [2021-07-13 19:31:57,947 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:31:57,947 INFO L276 IsEmpty]: Start isEmpty. Operand 737 states and 2111 transitions. [2021-07-13 19:31:57,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:31:57,948 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:31:57,948 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:31:58,149 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1718,247 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:31:58,149 INFO L430 AbstractCegarLoop]: === Iteration 257 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:31:58,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:31:58,149 INFO L82 PathProgramCache]: Analyzing trace with hash 156957368, now seen corresponding path program 243 times [2021-07-13 19:31:58,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:31:58,150 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742671989] [2021-07-13 19:31:58,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:31:58,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:31:58,235 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:31:58,235 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:31:58,235 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742671989] [2021-07-13 19:31:58,235 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742671989] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:31:58,235 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1326081268] [2021-07-13 19:31:58,235 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:31:58,262 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:31:58,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:31:58,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 19:31:58,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:31:58,425 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:31:58,426 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:31:58,426 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:31:58,427 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:31:58,429 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:31:58,430 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:31:58,432 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:31:58,433 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:31:58,435 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:31:58,436 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:31:58,439 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:31:58,439 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:31:58,442 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:31:58,442 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:31:58,443 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:31:58,472 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-07-13 19:31:58,472 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:31:58,473 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:31:58,473 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-07-13 19:31:58,499 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:31:58,499 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1326081268] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:31:58,499 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:31:58,499 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-13 19:31:58,500 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164862058] [2021-07-13 19:31:58,500 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:31:58,500 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:31:58,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:31:58,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:31:58,500 INFO L87 Difference]: Start difference. First operand 737 states and 2111 transitions. Second operand has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:31:58,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:31:58,920 INFO L93 Difference]: Finished difference Result 1003 states and 2809 transitions. [2021-07-13 19:31:58,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 19:31:58,920 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:31:58,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:31:58,922 INFO L225 Difference]: With dead ends: 1003 [2021-07-13 19:31:58,922 INFO L226 Difference]: Without dead ends: 999 [2021-07-13 19:31:58,922 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 456.4ms TimeCoverageRelationStatistics Valid=104, Invalid=652, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:31:58,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 999 states. [2021-07-13 19:31:58,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 999 to 737. [2021-07-13 19:31:58,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 737 states, 736 states have (on average 2.8668478260869565) internal successors, (2110), 736 states have internal predecessors, (2110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:31:58,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 737 states to 737 states and 2110 transitions. [2021-07-13 19:31:58,931 INFO L78 Accepts]: Start accepts. Automaton has 737 states and 2110 transitions. Word has length 17 [2021-07-13 19:31:58,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:31:58,931 INFO L482 AbstractCegarLoop]: Abstraction has 737 states and 2110 transitions. [2021-07-13 19:31:58,931 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:31:58,931 INFO L276 IsEmpty]: Start isEmpty. Operand 737 states and 2110 transitions. [2021-07-13 19:31:58,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:31:58,932 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:31:58,932 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:31:59,132 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1721,248 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:31:59,133 INFO L430 AbstractCegarLoop]: === Iteration 258 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:31:59,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:31:59,133 INFO L82 PathProgramCache]: Analyzing trace with hash -1934947334, now seen corresponding path program 244 times [2021-07-13 19:31:59,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:31:59,133 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758238286] [2021-07-13 19:31:59,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:31:59,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:31:59,210 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:31:59,210 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:31:59,210 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758238286] [2021-07-13 19:31:59,211 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [758238286] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:31:59,211 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1603536339] [2021-07-13 19:31:59,211 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:31:59,237 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:31:59,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:31:59,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 19:31:59,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:31:59,374 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:31:59,375 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:31:59,375 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:31:59,376 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:31:59,378 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:31:59,378 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:31:59,378 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:31:59,399 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-07-13 19:31:59,399 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:31:59,400 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:31:59,400 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-07-13 19:31:59,419 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:31:59,419 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1603536339] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:31:59,419 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:31:59,419 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-13 19:31:59,419 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768542054] [2021-07-13 19:31:59,419 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:31:59,419 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:31:59,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:31:59,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:31:59,420 INFO L87 Difference]: Start difference. First operand 737 states and 2110 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:31:59,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:31:59,918 INFO L93 Difference]: Finished difference Result 1031 states and 2870 transitions. [2021-07-13 19:31:59,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 19:31:59,918 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:31:59,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:31:59,920 INFO L225 Difference]: With dead ends: 1031 [2021-07-13 19:31:59,920 INFO L226 Difference]: Without dead ends: 1031 [2021-07-13 19:31:59,920 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 434.1ms TimeCoverageRelationStatistics Valid=123, Invalid=689, Unknown=0, NotChecked=0, Total=812 [2021-07-13 19:31:59,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1031 states. [2021-07-13 19:31:59,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1031 to 740. [2021-07-13 19:31:59,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 740 states, 739 states have (on average 2.8673883626522327) internal successors, (2119), 739 states have internal predecessors, (2119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:31:59,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 740 states to 740 states and 2119 transitions. [2021-07-13 19:31:59,929 INFO L78 Accepts]: Start accepts. Automaton has 740 states and 2119 transitions. Word has length 17 [2021-07-13 19:31:59,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:31:59,929 INFO L482 AbstractCegarLoop]: Abstraction has 740 states and 2119 transitions. [2021-07-13 19:31:59,929 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:31:59,929 INFO L276 IsEmpty]: Start isEmpty. Operand 740 states and 2119 transitions. [2021-07-13 19:31:59,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:31:59,930 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:31:59,930 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:32:00,130 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1728,249 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:32:00,130 INFO L430 AbstractCegarLoop]: === Iteration 259 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:32:00,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:32:00,131 INFO L82 PathProgramCache]: Analyzing trace with hash -380898210, now seen corresponding path program 245 times [2021-07-13 19:32:00,131 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:32:00,131 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568657330] [2021-07-13 19:32:00,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:32:00,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:32:00,217 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:32:00,218 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:32:00,218 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568657330] [2021-07-13 19:32:00,218 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [568657330] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:32:00,218 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1902897041] [2021-07-13 19:32:00,218 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:32:00,245 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:32:00,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:32:00,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 19:32:00,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:32:00,395 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:32:00,396 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:32:00,396 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:32:00,396 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:32:00,399 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:32:00,399 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:32:00,402 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:32:00,402 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:32:00,404 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:32:00,405 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:32:00,407 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:32:00,408 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:32:00,410 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:32:00,410 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:32:00,411 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:32:00,440 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-07-13 19:32:00,440 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:32:00,441 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:32:00,441 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-07-13 19:32:00,467 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:32:00,467 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1902897041] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:32:00,467 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:32:00,468 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-13 19:32:00,468 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138093946] [2021-07-13 19:32:00,468 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:32:00,468 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:32:00,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:32:00,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:32:00,468 INFO L87 Difference]: Start difference. First operand 740 states and 2119 transitions. Second operand has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:32:00,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:32:00,896 INFO L93 Difference]: Finished difference Result 1012 states and 2827 transitions. [2021-07-13 19:32:00,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 19:32:00,896 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:32:00,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:32:00,898 INFO L225 Difference]: With dead ends: 1012 [2021-07-13 19:32:00,898 INFO L226 Difference]: Without dead ends: 1009 [2021-07-13 19:32:00,898 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 443.2ms TimeCoverageRelationStatistics Valid=107, Invalid=649, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:32:00,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1009 states. [2021-07-13 19:32:00,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1009 to 742. [2021-07-13 19:32:00,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 742 states, 741 states have (on average 2.866396761133603) internal successors, (2124), 741 states have internal predecessors, (2124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:32:00,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 742 states to 742 states and 2124 transitions. [2021-07-13 19:32:00,911 INFO L78 Accepts]: Start accepts. Automaton has 742 states and 2124 transitions. Word has length 17 [2021-07-13 19:32:00,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:32:00,911 INFO L482 AbstractCegarLoop]: Abstraction has 742 states and 2124 transitions. [2021-07-13 19:32:00,912 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:32:00,912 INFO L276 IsEmpty]: Start isEmpty. Operand 742 states and 2124 transitions. [2021-07-13 19:32:00,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:32:00,912 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:32:00,912 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:32:01,113 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 250 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1731 [2021-07-13 19:32:01,113 INFO L430 AbstractCegarLoop]: === Iteration 260 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:32:01,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:32:01,113 INFO L82 PathProgramCache]: Analyzing trace with hash -1695304996, now seen corresponding path program 246 times [2021-07-13 19:32:01,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:32:01,113 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792155251] [2021-07-13 19:32:01,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:32:01,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:32:01,191 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:32:01,191 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:32:01,191 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792155251] [2021-07-13 19:32:01,191 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1792155251] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:32:01,191 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1422458999] [2021-07-13 19:32:01,191 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:32:01,219 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:32:01,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:32:01,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 19:32:01,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:32:01,353 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:32:01,353 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:32:01,353 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:32:01,354 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:32:01,356 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:32:01,356 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:32:01,357 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:32:01,378 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-07-13 19:32:01,378 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:32:01,379 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:32:01,379 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-07-13 19:32:01,398 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:32:01,398 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1422458999] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:32:01,398 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:32:01,398 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-13 19:32:01,398 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355044767] [2021-07-13 19:32:01,399 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:32:01,399 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:32:01,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:32:01,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:32:01,399 INFO L87 Difference]: Start difference. First operand 742 states and 2124 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:32:01,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:32:01,926 INFO L93 Difference]: Finished difference Result 1104 states and 2998 transitions. [2021-07-13 19:32:01,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-13 19:32:01,926 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:32:01,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:32:01,928 INFO L225 Difference]: With dead ends: 1104 [2021-07-13 19:32:01,928 INFO L226 Difference]: Without dead ends: 1104 [2021-07-13 19:32:01,928 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 459.8ms TimeCoverageRelationStatistics Valid=143, Invalid=913, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 19:32:01,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1104 states. [2021-07-13 19:32:01,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1104 to 753. [2021-07-13 19:32:01,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 753 states, 752 states have (on average 2.875) internal successors, (2162), 752 states have internal predecessors, (2162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:32:01,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 753 states to 753 states and 2162 transitions. [2021-07-13 19:32:01,938 INFO L78 Accepts]: Start accepts. Automaton has 753 states and 2162 transitions. Word has length 17 [2021-07-13 19:32:01,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:32:01,938 INFO L482 AbstractCegarLoop]: Abstraction has 753 states and 2162 transitions. [2021-07-13 19:32:01,938 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:32:01,938 INFO L276 IsEmpty]: Start isEmpty. Operand 753 states and 2162 transitions. [2021-07-13 19:32:01,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:32:01,939 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:32:01,939 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:32:02,139 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1738,251 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:32:02,139 INFO L430 AbstractCegarLoop]: === Iteration 261 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:32:02,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:32:02,140 INFO L82 PathProgramCache]: Analyzing trace with hash 1679961592, now seen corresponding path program 247 times [2021-07-13 19:32:02,140 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:32:02,140 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773590315] [2021-07-13 19:32:02,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:32:02,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:32:02,226 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:32:02,226 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:32:02,226 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773590315] [2021-07-13 19:32:02,226 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [773590315] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:32:02,226 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [238496626] [2021-07-13 19:32:02,226 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:32:02,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:32:02,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 19:32:02,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:32:02,401 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:32:02,402 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:32:02,402 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:32:02,403 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:32:02,405 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:32:02,406 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:32:02,408 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:32:02,409 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:32:02,412 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:32:02,413 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:32:02,415 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:32:02,416 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:32:02,418 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:32:02,418 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:32:02,419 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:32:02,449 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-07-13 19:32:02,449 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:32:02,450 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:32:02,450 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-07-13 19:32:02,477 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:32:02,478 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [238496626] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:32:02,478 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:32:02,478 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-13 19:32:02,478 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616985123] [2021-07-13 19:32:02,478 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:32:02,478 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:32:02,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:32:02,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:32:02,478 INFO L87 Difference]: Start difference. First operand 753 states and 2162 transitions. Second operand has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:32:02,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:32:02,909 INFO L93 Difference]: Finished difference Result 1026 states and 2871 transitions. [2021-07-13 19:32:02,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 19:32:02,910 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:32:02,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:32:02,911 INFO L225 Difference]: With dead ends: 1026 [2021-07-13 19:32:02,911 INFO L226 Difference]: Without dead ends: 1024 [2021-07-13 19:32:02,911 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 421.8ms TimeCoverageRelationStatistics Valid=105, Invalid=597, Unknown=0, NotChecked=0, Total=702 [2021-07-13 19:32:02,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1024 states. [2021-07-13 19:32:02,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1024 to 755. [2021-07-13 19:32:02,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 755 states, 754 states have (on average 2.874005305039788) internal successors, (2167), 754 states have internal predecessors, (2167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:32:02,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 755 states to 755 states and 2167 transitions. [2021-07-13 19:32:02,920 INFO L78 Accepts]: Start accepts. Automaton has 755 states and 2167 transitions. Word has length 17 [2021-07-13 19:32:02,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:32:02,920 INFO L482 AbstractCegarLoop]: Abstraction has 755 states and 2167 transitions. [2021-07-13 19:32:02,920 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:32:02,920 INFO L276 IsEmpty]: Start isEmpty. Operand 755 states and 2167 transitions. [2021-07-13 19:32:02,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:32:02,921 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:32:02,921 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:32:03,122 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 252 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1741 [2021-07-13 19:32:03,122 INFO L430 AbstractCegarLoop]: === Iteration 262 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:32:03,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:32:03,122 INFO L82 PathProgramCache]: Analyzing trace with hash -1687574598, now seen corresponding path program 248 times [2021-07-13 19:32:03,122 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:32:03,122 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366968237] [2021-07-13 19:32:03,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:32:03,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:32:03,208 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:32:03,208 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:32:03,208 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366968237] [2021-07-13 19:32:03,208 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1366968237] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:32:03,208 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [475047392] [2021-07-13 19:32:03,208 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:32:03,237 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:32:03,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:32:03,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 19:32:03,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:32:03,345 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:32:03,345 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:32:03,345 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:32:03,346 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:32:03,348 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:32:03,349 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:32:03,349 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:32:03,350 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:32:03,352 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:32:03,352 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:32:03,352 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:32:03,353 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:32:03,355 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:32:03,355 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:32:03,356 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:32:03,391 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-07-13 19:32:03,391 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:32:03,392 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:32:03,392 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-07-13 19:32:03,448 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:32:03,448 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [475047392] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:32:03,448 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:32:03,448 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-13 19:32:03,448 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789958554] [2021-07-13 19:32:03,448 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:32:03,448 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:32:03,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:32:03,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:32:03,449 INFO L87 Difference]: Start difference. First operand 755 states and 2167 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:32:04,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:32:04,039 INFO L93 Difference]: Finished difference Result 1115 states and 3013 transitions. [2021-07-13 19:32:04,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-13 19:32:04,039 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:32:04,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:32:04,041 INFO L225 Difference]: With dead ends: 1115 [2021-07-13 19:32:04,041 INFO L226 Difference]: Without dead ends: 1115 [2021-07-13 19:32:04,041 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 522.0ms TimeCoverageRelationStatistics Valid=123, Invalid=747, Unknown=0, NotChecked=0, Total=870 [2021-07-13 19:32:04,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1115 states. [2021-07-13 19:32:04,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1115 to 762. [2021-07-13 19:32:04,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 762 states, 761 states have (on average 2.8804204993429696) internal successors, (2192), 761 states have internal predecessors, (2192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:32:04,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 762 states to 762 states and 2192 transitions. [2021-07-13 19:32:04,050 INFO L78 Accepts]: Start accepts. Automaton has 762 states and 2192 transitions. Word has length 17 [2021-07-13 19:32:04,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:32:04,050 INFO L482 AbstractCegarLoop]: Abstraction has 762 states and 2192 transitions. [2021-07-13 19:32:04,050 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:32:04,050 INFO L276 IsEmpty]: Start isEmpty. Operand 762 states and 2192 transitions. [2021-07-13 19:32:04,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:32:04,051 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:32:04,051 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:32:04,251 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1748,253 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:32:04,252 INFO L430 AbstractCegarLoop]: === Iteration 263 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:32:04,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:32:04,252 INFO L82 PathProgramCache]: Analyzing trace with hash -885958370, now seen corresponding path program 249 times [2021-07-13 19:32:04,252 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:32:04,252 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148478973] [2021-07-13 19:32:04,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:32:04,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:32:04,343 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:32:04,343 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:32:04,343 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148478973] [2021-07-13 19:32:04,343 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1148478973] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:32:04,343 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1986558313] [2021-07-13 19:32:04,343 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:32:04,370 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:32:04,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:32:04,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 19:32:04,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:32:04,475 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:32:04,475 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:32:04,475 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:32:04,476 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:32:04,478 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:32:04,479 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:32:04,479 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:32:04,480 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:32:04,482 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:32:04,482 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:32:04,482 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:32:04,483 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:32:04,485 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:32:04,485 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:32:04,486 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:32:04,520 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-07-13 19:32:04,520 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:32:04,521 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:32:04,521 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-07-13 19:32:04,592 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:32:04,592 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1986558313] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:32:04,592 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:32:04,592 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-13 19:32:04,592 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652460427] [2021-07-13 19:32:04,592 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:32:04,592 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:32:04,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:32:04,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:32:04,593 INFO L87 Difference]: Start difference. First operand 762 states and 2192 transitions. Second operand has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:32:05,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:32:05,282 INFO L93 Difference]: Finished difference Result 1062 states and 2940 transitions. [2021-07-13 19:32:05,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-13 19:32:05,282 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:32:05,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:32:05,284 INFO L225 Difference]: With dead ends: 1062 [2021-07-13 19:32:05,284 INFO L226 Difference]: Without dead ends: 1059 [2021-07-13 19:32:05,284 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 637.5ms TimeCoverageRelationStatistics Valid=150, Invalid=780, Unknown=0, NotChecked=0, Total=930 [2021-07-13 19:32:05,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1059 states. [2021-07-13 19:32:05,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1059 to 764. [2021-07-13 19:32:05,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 764 states, 763 states have (on average 2.8807339449541285) internal successors, (2198), 763 states have internal predecessors, (2198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:32:05,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 764 states to 764 states and 2198 transitions. [2021-07-13 19:32:05,294 INFO L78 Accepts]: Start accepts. Automaton has 764 states and 2198 transitions. Word has length 17 [2021-07-13 19:32:05,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:32:05,295 INFO L482 AbstractCegarLoop]: Abstraction has 764 states and 2198 transitions. [2021-07-13 19:32:05,295 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:32:05,295 INFO L276 IsEmpty]: Start isEmpty. Operand 764 states and 2198 transitions. [2021-07-13 19:32:05,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:32:05,296 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:32:05,296 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:32:05,496 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1752,254 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:32:05,496 INFO L430 AbstractCegarLoop]: === Iteration 264 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:32:05,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:32:05,497 INFO L82 PathProgramCache]: Analyzing trace with hash 832385336, now seen corresponding path program 250 times [2021-07-13 19:32:05,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:32:05,497 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098733527] [2021-07-13 19:32:05,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:32:05,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:32:05,600 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:32:05,600 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:32:05,600 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098733527] [2021-07-13 19:32:05,600 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2098733527] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:32:05,601 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1485362328] [2021-07-13 19:32:05,601 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:32:05,629 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:32:05,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:32:05,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 19:32:05,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:32:05,733 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:32:05,734 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:32:05,734 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:32:05,735 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:32:05,737 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:32:05,738 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:32:05,738 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:32:05,739 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:32:05,742 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:32:05,742 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:32:05,742 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:32:05,743 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:32:05,745 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:32:05,745 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:32:05,746 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:32:05,779 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-07-13 19:32:05,779 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:32:05,780 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:32:05,780 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-07-13 19:32:05,830 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:32:05,831 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1485362328] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:32:05,831 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:32:05,831 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-13 19:32:05,831 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352464373] [2021-07-13 19:32:05,831 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:32:05,831 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:32:05,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:32:05,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:32:05,831 INFO L87 Difference]: Start difference. First operand 764 states and 2198 transitions. Second operand has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:32:06,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:32:06,226 INFO L93 Difference]: Finished difference Result 1051 states and 2924 transitions. [2021-07-13 19:32:06,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 19:32:06,226 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:32:06,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:32:06,228 INFO L225 Difference]: With dead ends: 1051 [2021-07-13 19:32:06,228 INFO L226 Difference]: Without dead ends: 1051 [2021-07-13 19:32:06,228 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 407.0ms TimeCoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:32:06,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1051 states. [2021-07-13 19:32:06,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1051 to 762. [2021-07-13 19:32:06,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 762 states, 761 states have (on average 2.8777923784494086) internal successors, (2190), 761 states have internal predecessors, (2190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:32:06,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 762 states to 762 states and 2190 transitions. [2021-07-13 19:32:06,243 INFO L78 Accepts]: Start accepts. Automaton has 762 states and 2190 transitions. Word has length 17 [2021-07-13 19:32:06,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:32:06,243 INFO L482 AbstractCegarLoop]: Abstraction has 762 states and 2190 transitions. [2021-07-13 19:32:06,243 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:32:06,243 INFO L276 IsEmpty]: Start isEmpty. Operand 762 states and 2190 transitions. [2021-07-13 19:32:06,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:32:06,244 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:32:06,244 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:32:06,452 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1758,255 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:32:06,453 INFO L430 AbstractCegarLoop]: === Iteration 265 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:32:06,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:32:06,453 INFO L82 PathProgramCache]: Analyzing trace with hash 111873060, now seen corresponding path program 251 times [2021-07-13 19:32:06,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:32:06,453 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42669931] [2021-07-13 19:32:06,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:32:06,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:32:06,529 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:32:06,529 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:32:06,529 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42669931] [2021-07-13 19:32:06,529 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [42669931] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:32:06,529 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [624751019] [2021-07-13 19:32:06,529 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:32:06,562 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:32:06,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:32:06,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 19:32:06,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:32:06,683 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:32:06,683 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:32:06,683 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:32:06,684 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:32:06,686 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:32:06,686 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:32:06,687 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:32:06,708 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-07-13 19:32:06,708 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:32:06,709 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:32:06,709 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-07-13 19:32:06,729 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:32:06,729 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [624751019] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:32:06,729 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:32:06,729 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-13 19:32:06,729 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329338332] [2021-07-13 19:32:06,729 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:32:06,729 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:32:06,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:32:06,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:32:06,729 INFO L87 Difference]: Start difference. First operand 762 states and 2190 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:32:06,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:32:06,896 INFO L93 Difference]: Finished difference Result 875 states and 2459 transitions. [2021-07-13 19:32:06,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:32:06,896 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:32:06,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:32:06,897 INFO L225 Difference]: With dead ends: 875 [2021-07-13 19:32:06,898 INFO L226 Difference]: Without dead ends: 875 [2021-07-13 19:32:06,898 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 158.8ms TimeCoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:32:06,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 875 states. [2021-07-13 19:32:06,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 875 to 768. [2021-07-13 19:32:06,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 768 states, 767 states have (on average 2.876140808344198) internal successors, (2206), 767 states have internal predecessors, (2206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:32:06,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 768 states to 768 states and 2206 transitions. [2021-07-13 19:32:06,907 INFO L78 Accepts]: Start accepts. Automaton has 768 states and 2206 transitions. Word has length 17 [2021-07-13 19:32:06,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:32:06,907 INFO L482 AbstractCegarLoop]: Abstraction has 768 states and 2206 transitions. [2021-07-13 19:32:06,907 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:32:06,907 INFO L276 IsEmpty]: Start isEmpty. Operand 768 states and 2206 transitions. [2021-07-13 19:32:06,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:32:06,908 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:32:06,908 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:32:07,108 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1762,256 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:32:07,108 INFO L430 AbstractCegarLoop]: === Iteration 266 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:32:07,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:32:07,109 INFO L82 PathProgramCache]: Analyzing trace with hash 1042755648, now seen corresponding path program 252 times [2021-07-13 19:32:07,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:32:07,109 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795426] [2021-07-13 19:32:07,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:32:07,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:32:07,194 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:32:07,195 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:32:07,195 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795426] [2021-07-13 19:32:07,195 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1795426] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:32:07,195 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1409251248] [2021-07-13 19:32:07,195 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:32:07,223 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:32:07,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:32:07,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 19:32:07,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:32:07,417 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:32:07,417 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:32:07,417 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:32:07,418 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:32:07,420 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:32:07,421 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:32:07,423 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:32:07,424 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:32:07,431 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:32:07,432 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:32:07,435 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:32:07,436 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:32:07,438 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:32:07,438 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:32:07,439 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:32:07,469 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-07-13 19:32:07,470 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:32:07,471 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:32:07,471 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-07-13 19:32:07,499 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:32:07,499 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1409251248] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:32:07,499 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:32:07,499 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-13 19:32:07,499 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516792843] [2021-07-13 19:32:07,499 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:32:07,499 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:32:07,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:32:07,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:32:07,500 INFO L87 Difference]: Start difference. First operand 768 states and 2206 transitions. Second operand has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:32:07,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:32:07,789 INFO L93 Difference]: Finished difference Result 866 states and 2433 transitions. [2021-07-13 19:32:07,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 19:32:07,790 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:32:07,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:32:07,791 INFO L225 Difference]: With dead ends: 866 [2021-07-13 19:32:07,791 INFO L226 Difference]: Without dead ends: 862 [2021-07-13 19:32:07,791 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 358.9ms TimeCoverageRelationStatistics Valid=70, Invalid=482, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:32:07,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 862 states. [2021-07-13 19:32:07,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 862 to 770. [2021-07-13 19:32:07,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 770 states, 769 states have (on average 2.869960988296489) internal successors, (2207), 769 states have internal predecessors, (2207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:32:07,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 770 states to 770 states and 2207 transitions. [2021-07-13 19:32:07,799 INFO L78 Accepts]: Start accepts. Automaton has 770 states and 2207 transitions. Word has length 17 [2021-07-13 19:32:07,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:32:07,800 INFO L482 AbstractCegarLoop]: Abstraction has 770 states and 2207 transitions. [2021-07-13 19:32:07,800 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:32:07,800 INFO L276 IsEmpty]: Start isEmpty. Operand 770 states and 2207 transitions. [2021-07-13 19:32:07,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:32:07,800 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:32:07,801 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:32:08,002 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 257 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1765 [2021-07-13 19:32:08,002 INFO L430 AbstractCegarLoop]: === Iteration 267 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:32:08,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:32:08,002 INFO L82 PathProgramCache]: Analyzing trace with hash -1049149054, now seen corresponding path program 253 times [2021-07-13 19:32:08,002 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:32:08,003 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300417473] [2021-07-13 19:32:08,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:32:08,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:32:08,078 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:32:08,079 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:32:08,079 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300417473] [2021-07-13 19:32:08,079 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [300417473] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:32:08,079 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [161377910] [2021-07-13 19:32:08,079 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:32:08,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:32:08,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 19:32:08,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:32:08,230 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:32:08,231 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:32:08,231 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:32:08,232 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:32:08,234 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:32:08,234 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:32:08,235 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:32:08,264 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-07-13 19:32:08,264 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:32:08,265 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:32:08,265 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-07-13 19:32:08,284 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:32:08,284 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [161377910] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:32:08,284 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:32:08,284 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-13 19:32:08,284 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581760511] [2021-07-13 19:32:08,284 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:32:08,284 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:32:08,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:32:08,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:32:08,285 INFO L87 Difference]: Start difference. First operand 770 states and 2207 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:32:08,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:32:08,733 INFO L93 Difference]: Finished difference Result 885 states and 2480 transitions. [2021-07-13 19:32:08,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 19:32:08,734 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:32:08,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:32:08,735 INFO L225 Difference]: With dead ends: 885 [2021-07-13 19:32:08,735 INFO L226 Difference]: Without dead ends: 885 [2021-07-13 19:32:08,735 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 426.3ms TimeCoverageRelationStatistics Valid=121, Invalid=691, Unknown=0, NotChecked=0, Total=812 [2021-07-13 19:32:08,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 885 states. [2021-07-13 19:32:08,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 885 to 767. [2021-07-13 19:32:08,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 767 states, 766 states have (on average 2.877284595300261) internal successors, (2204), 766 states have internal predecessors, (2204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:32:08,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 767 states to 767 states and 2204 transitions. [2021-07-13 19:32:08,744 INFO L78 Accepts]: Start accepts. Automaton has 767 states and 2204 transitions. Word has length 17 [2021-07-13 19:32:08,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:32:08,744 INFO L482 AbstractCegarLoop]: Abstraction has 767 states and 2204 transitions. [2021-07-13 19:32:08,744 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:32:08,745 INFO L276 IsEmpty]: Start isEmpty. Operand 767 states and 2204 transitions. [2021-07-13 19:32:08,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:32:08,745 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:32:08,745 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:32:08,946 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 258 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1772 [2021-07-13 19:32:08,946 INFO L430 AbstractCegarLoop]: === Iteration 268 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:32:08,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:32:08,946 INFO L82 PathProgramCache]: Analyzing trace with hash 504900070, now seen corresponding path program 254 times [2021-07-13 19:32:08,946 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:32:08,946 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527857606] [2021-07-13 19:32:08,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:32:08,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:32:09,033 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:32:09,034 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:32:09,034 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527857606] [2021-07-13 19:32:09,034 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [527857606] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:32:09,034 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1093277965] [2021-07-13 19:32:09,034 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:32:09,061 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:32:09,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:32:09,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 19:32:09,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:32:09,217 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:32:09,217 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:32:09,217 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:32:09,218 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:32:09,220 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:32:09,221 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:32:09,223 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:32:09,224 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:32:09,226 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:32:09,227 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:32:09,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:32:09,230 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:32:09,232 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:32:09,232 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:32:09,233 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:32:09,262 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-07-13 19:32:09,262 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:32:09,263 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:32:09,263 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-07-13 19:32:09,289 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:32:09,290 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1093277965] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:32:09,290 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:32:09,290 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-13 19:32:09,290 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212852751] [2021-07-13 19:32:09,290 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:32:09,290 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:32:09,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:32:09,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:32:09,290 INFO L87 Difference]: Start difference. First operand 767 states and 2204 transitions. Second operand has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:32:09,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:32:09,524 INFO L93 Difference]: Finished difference Result 860 states and 2428 transitions. [2021-07-13 19:32:09,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:32:09,525 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:32:09,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:32:09,526 INFO L225 Difference]: With dead ends: 860 [2021-07-13 19:32:09,526 INFO L226 Difference]: Without dead ends: 857 [2021-07-13 19:32:09,526 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 292.2ms TimeCoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:32:09,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 857 states. [2021-07-13 19:32:09,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 857 to 768. [2021-07-13 19:32:09,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 768 states, 767 states have (on average 2.876140808344198) internal successors, (2206), 767 states have internal predecessors, (2206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:32:09,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 768 states to 768 states and 2206 transitions. [2021-07-13 19:32:09,535 INFO L78 Accepts]: Start accepts. Automaton has 768 states and 2206 transitions. Word has length 17 [2021-07-13 19:32:09,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:32:09,535 INFO L482 AbstractCegarLoop]: Abstraction has 768 states and 2206 transitions. [2021-07-13 19:32:09,535 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:32:09,535 INFO L276 IsEmpty]: Start isEmpty. Operand 768 states and 2206 transitions. [2021-07-13 19:32:09,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:32:09,536 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:32:09,536 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:32:09,736 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 259 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1775 [2021-07-13 19:32:09,736 INFO L430 AbstractCegarLoop]: === Iteration 269 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:32:09,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:32:09,737 INFO L82 PathProgramCache]: Analyzing trace with hash -809506716, now seen corresponding path program 255 times [2021-07-13 19:32:09,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:32:09,737 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123870223] [2021-07-13 19:32:09,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:32:09,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:32:09,821 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:32:09,821 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:32:09,821 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123870223] [2021-07-13 19:32:09,821 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2123870223] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:32:09,821 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [447632127] [2021-07-13 19:32:09,821 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:32:09,849 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 19:32:09,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:32:09,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 19:32:09,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:32:09,974 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:32:09,974 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:32:09,974 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:32:09,975 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:32:09,977 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:32:09,977 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:32:09,978 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:32:09,999 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-07-13 19:32:09,999 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:32:10,000 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:32:10,000 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-07-13 19:32:10,023 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:32:10,024 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [447632127] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:32:10,024 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:32:10,024 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-13 19:32:10,024 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766853960] [2021-07-13 19:32:10,024 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:32:10,024 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:32:10,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:32:10,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:32:10,024 INFO L87 Difference]: Start difference. First operand 768 states and 2206 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:32:10,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:32:10,612 INFO L93 Difference]: Finished difference Result 955 states and 2603 transitions. [2021-07-13 19:32:10,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-13 19:32:10,613 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:32:10,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:32:10,614 INFO L225 Difference]: With dead ends: 955 [2021-07-13 19:32:10,614 INFO L226 Difference]: Without dead ends: 955 [2021-07-13 19:32:10,614 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 510.5ms TimeCoverageRelationStatistics Valid=143, Invalid=913, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 19:32:10,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 955 states. [2021-07-13 19:32:10,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 955 to 779. [2021-07-13 19:32:10,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 779 states, 778 states have (on average 2.884318766066838) internal successors, (2244), 778 states have internal predecessors, (2244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:32:10,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 779 states to 779 states and 2244 transitions. [2021-07-13 19:32:10,624 INFO L78 Accepts]: Start accepts. Automaton has 779 states and 2244 transitions. Word has length 17 [2021-07-13 19:32:10,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:32:10,624 INFO L482 AbstractCegarLoop]: Abstraction has 779 states and 2244 transitions. [2021-07-13 19:32:10,624 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:32:10,624 INFO L276 IsEmpty]: Start isEmpty. Operand 779 states and 2244 transitions. [2021-07-13 19:32:10,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:32:10,625 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:32:10,625 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:32:10,825 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 260 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1782 [2021-07-13 19:32:10,825 INFO L430 AbstractCegarLoop]: === Iteration 270 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:32:10,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:32:10,825 INFO L82 PathProgramCache]: Analyzing trace with hash -1729207424, now seen corresponding path program 256 times [2021-07-13 19:32:10,826 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:32:10,826 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704852780] [2021-07-13 19:32:10,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:32:10,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:32:10,909 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:32:10,909 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:32:10,909 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704852780] [2021-07-13 19:32:10,909 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [704852780] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:32:10,909 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1157350201] [2021-07-13 19:32:10,909 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:32:10,936 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:32:10,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:32:10,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 19:32:10,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:32:11,081 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:32:11,081 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:32:11,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:32:11,082 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:32:11,084 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:32:11,085 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:32:11,087 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:32:11,088 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:32:11,090 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:32:11,091 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:32:11,093 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:32:11,094 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:32:11,096 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:32:11,096 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:32:11,097 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:32:11,126 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-07-13 19:32:11,126 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:32:11,127 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:32:11,127 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-07-13 19:32:11,153 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:32:11,153 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1157350201] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:32:11,153 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:32:11,153 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-13 19:32:11,154 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477884452] [2021-07-13 19:32:11,154 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:32:11,154 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:32:11,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:32:11,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:32:11,154 INFO L87 Difference]: Start difference. First operand 779 states and 2244 transitions. Second operand has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:32:11,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:32:11,493 INFO L93 Difference]: Finished difference Result 893 states and 2501 transitions. [2021-07-13 19:32:11,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 19:32:11,494 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:32:11,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:32:11,495 INFO L225 Difference]: With dead ends: 893 [2021-07-13 19:32:11,495 INFO L226 Difference]: Without dead ends: 891 [2021-07-13 19:32:11,495 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 342.3ms TimeCoverageRelationStatistics Valid=78, Invalid=522, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:32:11,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 891 states. [2021-07-13 19:32:11,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 891 to 784. [2021-07-13 19:32:11,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 784 states, 783 states have (on average 2.8850574712643677) internal successors, (2259), 783 states have internal predecessors, (2259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:32:11,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 784 states to 784 states and 2259 transitions. [2021-07-13 19:32:11,504 INFO L78 Accepts]: Start accepts. Automaton has 784 states and 2259 transitions. Word has length 17 [2021-07-13 19:32:11,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:32:11,504 INFO L482 AbstractCegarLoop]: Abstraction has 784 states and 2259 transitions. [2021-07-13 19:32:11,504 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:32:11,504 INFO L276 IsEmpty]: Start isEmpty. Operand 784 states and 2259 transitions. [2021-07-13 19:32:11,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:32:11,505 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:32:11,505 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:32:11,705 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 261 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1785 [2021-07-13 19:32:11,705 INFO L430 AbstractCegarLoop]: === Iteration 271 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:32:11,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:32:11,706 INFO L82 PathProgramCache]: Analyzing trace with hash -801776318, now seen corresponding path program 257 times [2021-07-13 19:32:11,706 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:32:11,706 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748923010] [2021-07-13 19:32:11,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:32:11,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:32:11,787 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:32:11,787 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:32:11,787 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748923010] [2021-07-13 19:32:11,787 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1748923010] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:32:11,787 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1552465289] [2021-07-13 19:32:11,787 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:32:11,814 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:32:11,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:32:11,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 19:32:11,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:32:11,915 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:32:11,916 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:32:11,916 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:32:11,917 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:32:11,919 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:32:11,919 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:32:11,919 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:32:11,920 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:32:11,922 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:32:11,923 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:32:11,923 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:32:11,924 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:32:11,926 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:32:11,926 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:32:11,926 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:32:11,958 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-07-13 19:32:11,958 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:32:11,959 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:32:11,959 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-07-13 19:32:12,006 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:32:12,007 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1552465289] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:32:12,007 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:32:12,007 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-13 19:32:12,007 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281878790] [2021-07-13 19:32:12,007 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:32:12,007 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:32:12,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:32:12,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:32:12,007 INFO L87 Difference]: Start difference. First operand 784 states and 2259 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:32:12,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:32:12,536 INFO L93 Difference]: Finished difference Result 980 states and 2646 transitions. [2021-07-13 19:32:12,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 19:32:12,536 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:32:12,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:32:12,538 INFO L225 Difference]: With dead ends: 980 [2021-07-13 19:32:12,538 INFO L226 Difference]: Without dead ends: 980 [2021-07-13 19:32:12,538 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 440.0ms TimeCoverageRelationStatistics Valid=114, Invalid=698, Unknown=0, NotChecked=0, Total=812 [2021-07-13 19:32:12,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 980 states. [2021-07-13 19:32:12,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 980 to 774. [2021-07-13 19:32:12,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 774 states, 773 states have (on average 2.8783958602846056) internal successors, (2225), 773 states have internal predecessors, (2225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:32:12,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 774 states to 774 states and 2225 transitions. [2021-07-13 19:32:12,547 INFO L78 Accepts]: Start accepts. Automaton has 774 states and 2225 transitions. Word has length 17 [2021-07-13 19:32:12,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:32:12,547 INFO L482 AbstractCegarLoop]: Abstraction has 774 states and 2225 transitions. [2021-07-13 19:32:12,547 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:32:12,547 INFO L276 IsEmpty]: Start isEmpty. Operand 774 states and 2225 transitions. [2021-07-13 19:32:12,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:32:12,548 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:32:12,548 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:32:12,748 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1792,262 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:32:12,749 INFO L430 AbstractCegarLoop]: === Iteration 272 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:32:12,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:32:12,749 INFO L82 PathProgramCache]: Analyzing trace with hash -160090, now seen corresponding path program 258 times [2021-07-13 19:32:12,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:32:12,749 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115151948] [2021-07-13 19:32:12,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:32:12,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:32:12,841 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:32:12,841 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:32:12,841 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115151948] [2021-07-13 19:32:12,841 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1115151948] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:32:12,841 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [887242102] [2021-07-13 19:32:12,841 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:32:12,867 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:32:12,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:32:12,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 19:32:12,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:32:12,962 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:32:12,963 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:32:12,963 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:32:12,964 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:32:12,966 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:32:12,966 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:32:12,967 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:32:12,967 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:32:12,970 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:32:12,970 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:32:12,970 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:32:12,971 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:32:12,973 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:32:12,973 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:32:12,974 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:32:13,005 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-07-13 19:32:13,005 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:32:13,006 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:32:13,006 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-07-13 19:32:13,068 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:32:13,069 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [887242102] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:32:13,069 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:32:13,069 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-13 19:32:13,069 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245800893] [2021-07-13 19:32:13,069 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:32:13,069 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:32:13,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:32:13,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:32:13,069 INFO L87 Difference]: Start difference. First operand 774 states and 2225 transitions. Second operand has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:32:13,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:32:13,513 INFO L93 Difference]: Finished difference Result 898 states and 2493 transitions. [2021-07-13 19:32:13,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 19:32:13,514 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:32:13,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:32:13,515 INFO L225 Difference]: With dead ends: 898 [2021-07-13 19:32:13,515 INFO L226 Difference]: Without dead ends: 895 [2021-07-13 19:32:13,515 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 403.3ms TimeCoverageRelationStatistics Valid=87, Invalid=563, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:32:13,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 895 states. [2021-07-13 19:32:13,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 895 to 776. [2021-07-13 19:32:13,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 776 states, 775 states have (on average 2.878709677419355) internal successors, (2231), 775 states have internal predecessors, (2231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:32:13,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 776 states to 776 states and 2231 transitions. [2021-07-13 19:32:13,524 INFO L78 Accepts]: Start accepts. Automaton has 776 states and 2231 transitions. Word has length 17 [2021-07-13 19:32:13,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:32:13,524 INFO L482 AbstractCegarLoop]: Abstraction has 776 states and 2231 transitions. [2021-07-13 19:32:13,524 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:32:13,524 INFO L276 IsEmpty]: Start isEmpty. Operand 776 states and 2231 transitions. [2021-07-13 19:32:13,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:32:13,525 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:32:13,525 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:32:13,725 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 263 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1796 [2021-07-13 19:32:13,725 INFO L430 AbstractCegarLoop]: === Iteration 273 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:32:13,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:32:13,726 INFO L82 PathProgramCache]: Analyzing trace with hash 1718183616, now seen corresponding path program 259 times [2021-07-13 19:32:13,726 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:32:13,726 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110970967] [2021-07-13 19:32:13,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:32:13,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:32:13,836 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:32:13,836 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:32:13,836 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110970967] [2021-07-13 19:32:13,836 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1110970967] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:32:13,836 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1364392077] [2021-07-13 19:32:13,836 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:32:13,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:32:13,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 19:32:13,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:32:13,961 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:32:13,962 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:32:13,962 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:32:13,963 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:32:13,965 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:32:13,965 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:32:13,965 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:32:13,966 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:32:13,968 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:32:13,969 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:32:13,969 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:32:13,969 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:32:13,971 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:32:13,972 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:32:13,972 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:32:14,004 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-07-13 19:32:14,004 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:32:14,005 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:32:14,005 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-07-13 19:32:14,053 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:32:14,053 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1364392077] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:32:14,053 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:32:14,053 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-13 19:32:14,054 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554655937] [2021-07-13 19:32:14,054 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:32:14,054 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:32:14,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:32:14,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:32:14,054 INFO L87 Difference]: Start difference. First operand 776 states and 2231 transitions. Second operand has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:32:14,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:32:14,290 INFO L93 Difference]: Finished difference Result 896 states and 2491 transitions. [2021-07-13 19:32:14,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:32:14,290 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:32:14,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:32:14,292 INFO L225 Difference]: With dead ends: 896 [2021-07-13 19:32:14,292 INFO L226 Difference]: Without dead ends: 896 [2021-07-13 19:32:14,292 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 271.1ms TimeCoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:32:14,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 896 states. [2021-07-13 19:32:14,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 896 to 770. [2021-07-13 19:32:14,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 770 states, 769 states have (on average 2.8764629388816645) internal successors, (2212), 769 states have internal predecessors, (2212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:32:14,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 770 states to 770 states and 2212 transitions. [2021-07-13 19:32:14,300 INFO L78 Accepts]: Start accepts. Automaton has 770 states and 2212 transitions. Word has length 17 [2021-07-13 19:32:14,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:32:14,300 INFO L482 AbstractCegarLoop]: Abstraction has 770 states and 2212 transitions. [2021-07-13 19:32:14,300 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:32:14,300 INFO L276 IsEmpty]: Start isEmpty. Operand 770 states and 2212 transitions. [2021-07-13 19:32:14,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:32:14,301 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:32:14,301 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:32:14,501 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 264 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1802 [2021-07-13 19:32:14,502 INFO L430 AbstractCegarLoop]: === Iteration 274 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:32:14,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:32:14,502 INFO L82 PathProgramCache]: Analyzing trace with hash -2143240642, now seen corresponding path program 260 times [2021-07-13 19:32:14,502 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:32:14,502 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360941648] [2021-07-13 19:32:14,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:32:14,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:32:14,584 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:32:14,584 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:32:14,584 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360941648] [2021-07-13 19:32:14,584 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [360941648] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:32:14,584 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1078792755] [2021-07-13 19:32:14,584 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:32:14,616 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:32:14,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:32:14,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 19:32:14,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:32:14,739 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:32:14,740 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:32:14,740 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:32:14,741 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:32:14,743 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:32:14,743 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:32:14,744 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:32:14,765 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-07-13 19:32:14,765 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:32:14,766 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:32:14,766 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-07-13 19:32:14,785 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:32:14,785 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1078792755] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:32:14,785 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:32:14,785 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-13 19:32:14,785 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75749049] [2021-07-13 19:32:14,785 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:32:14,785 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:32:14,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:32:14,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:32:14,786 INFO L87 Difference]: Start difference. First operand 770 states and 2212 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:32:15,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:32:15,076 INFO L93 Difference]: Finished difference Result 897 states and 2509 transitions. [2021-07-13 19:32:15,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 19:32:15,076 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:32:15,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:32:15,077 INFO L225 Difference]: With dead ends: 897 [2021-07-13 19:32:15,077 INFO L226 Difference]: Without dead ends: 897 [2021-07-13 19:32:15,077 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 212.2ms TimeCoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:32:15,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 897 states. [2021-07-13 19:32:15,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 897 to 774. [2021-07-13 19:32:15,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 774 states, 773 states have (on average 2.8771021992238035) internal successors, (2224), 773 states have internal predecessors, (2224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:32:15,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 774 states to 774 states and 2224 transitions. [2021-07-13 19:32:15,086 INFO L78 Accepts]: Start accepts. Automaton has 774 states and 2224 transitions. Word has length 17 [2021-07-13 19:32:15,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:32:15,086 INFO L482 AbstractCegarLoop]: Abstraction has 774 states and 2224 transitions. [2021-07-13 19:32:15,086 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:32:15,086 INFO L276 IsEmpty]: Start isEmpty. Operand 774 states and 2224 transitions. [2021-07-13 19:32:15,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:32:15,087 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:32:15,087 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:32:15,287 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1806,265 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:32:15,288 INFO L430 AbstractCegarLoop]: === Iteration 275 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:32:15,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:32:15,288 INFO L82 PathProgramCache]: Analyzing trace with hash -589191518, now seen corresponding path program 261 times [2021-07-13 19:32:15,288 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:32:15,288 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157342309] [2021-07-13 19:32:15,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:32:15,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:32:15,362 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:32:15,362 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:32:15,362 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157342309] [2021-07-13 19:32:15,362 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [157342309] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:32:15,363 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1606882192] [2021-07-13 19:32:15,363 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:32:15,391 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:32:15,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:32:15,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 19:32:15,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:32:15,526 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:32:15,527 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:32:15,527 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:32:15,528 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:32:15,530 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:32:15,531 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:32:15,533 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:32:15,533 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:32:15,536 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:32:15,536 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:32:15,539 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:32:15,539 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:32:15,541 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:32:15,542 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:32:15,543 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:32:15,571 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-07-13 19:32:15,572 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:32:15,572 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:32:15,573 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-07-13 19:32:15,599 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:32:15,599 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1606882192] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:32:15,599 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:32:15,599 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-13 19:32:15,599 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503334349] [2021-07-13 19:32:15,599 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:32:15,599 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:32:15,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:32:15,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:32:15,600 INFO L87 Difference]: Start difference. First operand 774 states and 2224 transitions. Second operand has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:32:15,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:32:15,943 INFO L93 Difference]: Finished difference Result 869 states and 2447 transitions. [2021-07-13 19:32:15,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 19:32:15,943 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:32:15,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:32:15,944 INFO L225 Difference]: With dead ends: 869 [2021-07-13 19:32:15,944 INFO L226 Difference]: Without dead ends: 863 [2021-07-13 19:32:15,945 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 344.3ms TimeCoverageRelationStatistics Valid=93, Invalid=609, Unknown=0, NotChecked=0, Total=702 [2021-07-13 19:32:15,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 863 states. [2021-07-13 19:32:15,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 863 to 774. [2021-07-13 19:32:15,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 774 states, 773 states have (on average 2.8732212160413972) internal successors, (2221), 773 states have internal predecessors, (2221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:32:15,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 774 states to 774 states and 2221 transitions. [2021-07-13 19:32:15,953 INFO L78 Accepts]: Start accepts. Automaton has 774 states and 2221 transitions. Word has length 17 [2021-07-13 19:32:15,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:32:15,953 INFO L482 AbstractCegarLoop]: Abstraction has 774 states and 2221 transitions. [2021-07-13 19:32:15,953 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:32:15,953 INFO L276 IsEmpty]: Start isEmpty. Operand 774 states and 2221 transitions. [2021-07-13 19:32:15,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:32:15,954 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:32:15,954 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:32:16,154 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 266 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1809 [2021-07-13 19:32:16,155 INFO L430 AbstractCegarLoop]: === Iteration 276 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:32:16,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:32:16,155 INFO L82 PathProgramCache]: Analyzing trace with hash -288346720, now seen corresponding path program 262 times [2021-07-13 19:32:16,155 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:32:16,155 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906067859] [2021-07-13 19:32:16,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:32:16,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:32:16,233 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:32:16,233 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:32:16,233 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906067859] [2021-07-13 19:32:16,233 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1906067859] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:32:16,234 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [31482463] [2021-07-13 19:32:16,234 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:32:16,260 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:32:16,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:32:16,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 19:32:16,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:32:16,346 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:32:16,347 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:32:16,347 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:32:16,348 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:32:16,350 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:32:16,350 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:32:16,350 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:32:16,351 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:32:16,353 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:32:16,354 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:32:16,354 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:32:16,355 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:32:16,357 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:32:16,357 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:32:16,358 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:32:16,389 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-07-13 19:32:16,390 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:32:16,390 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:32:16,390 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-07-13 19:32:16,464 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:32:16,464 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [31482463] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:32:16,464 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:32:16,464 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-13 19:32:16,464 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43595120] [2021-07-13 19:32:16,464 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:32:16,464 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:32:16,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:32:16,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:32:16,465 INFO L87 Difference]: Start difference. First operand 774 states and 2221 transitions. Second operand has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:32:17,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:32:17,073 INFO L93 Difference]: Finished difference Result 915 states and 2541 transitions. [2021-07-13 19:32:17,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-13 19:32:17,073 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:32:17,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:32:17,074 INFO L225 Difference]: With dead ends: 915 [2021-07-13 19:32:17,074 INFO L226 Difference]: Without dead ends: 911 [2021-07-13 19:32:17,075 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 556.2ms TimeCoverageRelationStatistics Valid=149, Invalid=973, Unknown=0, NotChecked=0, Total=1122 [2021-07-13 19:32:17,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 911 states. [2021-07-13 19:32:17,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 911 to 787. [2021-07-13 19:32:17,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 787 states, 786 states have (on average 2.880407124681934) internal successors, (2264), 786 states have internal predecessors, (2264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:32:17,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 787 states to 787 states and 2264 transitions. [2021-07-13 19:32:17,083 INFO L78 Accepts]: Start accepts. Automaton has 787 states and 2264 transitions. Word has length 17 [2021-07-13 19:32:17,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:32:17,083 INFO L482 AbstractCegarLoop]: Abstraction has 787 states and 2264 transitions. [2021-07-13 19:32:17,083 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:32:17,083 INFO L276 IsEmpty]: Start isEmpty. Operand 787 states and 2264 transitions. [2021-07-13 19:32:17,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:32:17,084 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:32:17,084 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:32:17,285 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1816,267 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:32:17,285 INFO L430 AbstractCegarLoop]: === Iteration 277 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:32:17,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:32:17,285 INFO L82 PathProgramCache]: Analyzing trace with hash -830512924, now seen corresponding path program 263 times [2021-07-13 19:32:17,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:32:17,285 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738558974] [2021-07-13 19:32:17,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:32:17,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:32:17,364 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:32:17,364 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:32:17,364 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738558974] [2021-07-13 19:32:17,364 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [738558974] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:32:17,364 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [432759037] [2021-07-13 19:32:17,364 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 268 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 268 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:32:17,391 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:32:17,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:32:17,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 19:32:17,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:32:17,498 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:32:17,499 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:32:17,499 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:32:17,500 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:32:17,502 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:32:17,503 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:32:17,503 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:32:17,524 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-07-13 19:32:17,525 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:32:17,525 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:32:17,526 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-07-13 19:32:17,545 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:32:17,545 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [432759037] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:32:17,545 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:32:17,545 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-13 19:32:17,545 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661036157] [2021-07-13 19:32:17,545 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:32:17,545 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:32:17,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:32:17,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:32:17,546 INFO L87 Difference]: Start difference. First operand 787 states and 2264 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:32:18,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:32:18,016 INFO L93 Difference]: Finished difference Result 1030 states and 2774 transitions. [2021-07-13 19:32:18,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-13 19:32:18,016 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:32:18,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:32:18,017 INFO L225 Difference]: With dead ends: 1030 [2021-07-13 19:32:18,017 INFO L226 Difference]: Without dead ends: 1030 [2021-07-13 19:32:18,018 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 321.6ms TimeCoverageRelationStatistics Valid=116, Invalid=814, Unknown=0, NotChecked=0, Total=930 [2021-07-13 19:32:18,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1030 states. [2021-07-13 19:32:18,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1030 to 811. [2021-07-13 19:32:18,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 811 states, 810 states have (on average 2.8925925925925924) internal successors, (2343), 810 states have internal predecessors, (2343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:32:18,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 811 states to 811 states and 2343 transitions. [2021-07-13 19:32:18,027 INFO L78 Accepts]: Start accepts. Automaton has 811 states and 2343 transitions. Word has length 17 [2021-07-13 19:32:18,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:32:18,027 INFO L482 AbstractCegarLoop]: Abstraction has 811 states and 2343 transitions. [2021-07-13 19:32:18,027 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:32:18,027 INFO L276 IsEmpty]: Start isEmpty. Operand 811 states and 2343 transitions. [2021-07-13 19:32:18,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:32:18,028 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:32:18,028 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:32:18,229 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 268 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1821 [2021-07-13 19:32:18,229 INFO L430 AbstractCegarLoop]: === Iteration 278 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:32:18,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:32:18,229 INFO L82 PathProgramCache]: Analyzing trace with hash -1750213632, now seen corresponding path program 264 times [2021-07-13 19:32:18,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:32:18,229 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067291463] [2021-07-13 19:32:18,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:32:18,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:32:18,312 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:32:18,312 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:32:18,312 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067291463] [2021-07-13 19:32:18,312 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1067291463] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:32:18,312 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1812559406] [2021-07-13 19:32:18,312 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 269 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 269 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:32:18,340 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:32:18,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:32:18,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 19:32:18,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:32:18,468 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:32:18,469 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:32:18,469 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:32:18,470 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:32:18,472 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:32:18,473 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:32:18,475 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:32:18,475 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:32:18,478 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:32:18,479 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:32:18,481 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:32:18,482 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:32:18,485 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:32:18,485 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:32:18,486 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:32:18,518 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-07-13 19:32:18,518 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:32:18,519 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:32:18,519 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-07-13 19:32:18,545 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:32:18,545 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1812559406] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:32:18,545 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:32:18,545 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-13 19:32:18,546 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577575860] [2021-07-13 19:32:18,546 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:32:18,546 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:32:18,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:32:18,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:32:18,546 INFO L87 Difference]: Start difference. First operand 811 states and 2343 transitions. Second operand has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:32:19,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:32:19,153 INFO L93 Difference]: Finished difference Result 957 states and 2638 transitions. [2021-07-13 19:32:19,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-13 19:32:19,153 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:32:19,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:32:19,155 INFO L225 Difference]: With dead ends: 957 [2021-07-13 19:32:19,155 INFO L226 Difference]: Without dead ends: 953 [2021-07-13 19:32:19,155 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 501.2ms TimeCoverageRelationStatistics Valid=134, Invalid=988, Unknown=0, NotChecked=0, Total=1122 [2021-07-13 19:32:19,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 953 states. [2021-07-13 19:32:19,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 953 to 811. [2021-07-13 19:32:19,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 811 states, 810 states have (on average 2.8814814814814813) internal successors, (2334), 810 states have internal predecessors, (2334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:32:19,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 811 states to 811 states and 2334 transitions. [2021-07-13 19:32:19,164 INFO L78 Accepts]: Start accepts. Automaton has 811 states and 2334 transitions. Word has length 17 [2021-07-13 19:32:19,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:32:19,164 INFO L482 AbstractCegarLoop]: Abstraction has 811 states and 2334 transitions. [2021-07-13 19:32:19,164 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:32:19,164 INFO L276 IsEmpty]: Start isEmpty. Operand 811 states and 2334 transitions. [2021-07-13 19:32:19,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:32:19,165 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:32:19,165 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:32:19,366 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 269 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1824 [2021-07-13 19:32:19,366 INFO L430 AbstractCegarLoop]: === Iteration 279 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:32:19,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:32:19,366 INFO L82 PathProgramCache]: Analyzing trace with hash 784738660, now seen corresponding path program 265 times [2021-07-13 19:32:19,367 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:32:19,367 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088982108] [2021-07-13 19:32:19,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:32:19,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:32:19,443 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:32:19,443 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:32:19,443 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088982108] [2021-07-13 19:32:19,443 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1088982108] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:32:19,443 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1510866464] [2021-07-13 19:32:19,443 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 270 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 270 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:32:19,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:32:19,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 19:32:19,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:32:19,547 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:32:19,548 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:32:19,548 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:32:19,548 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:32:19,551 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:32:19,551 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:32:19,551 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:32:19,552 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:32:19,554 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:32:19,555 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:32:19,555 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:32:19,555 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:32:19,557 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:32:19,558 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:32:19,558 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:32:19,591 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-07-13 19:32:19,591 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:32:19,591 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:32:19,591 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-07-13 19:32:19,658 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:32:19,659 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1510866464] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:32:19,659 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:32:19,659 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-13 19:32:19,659 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092399265] [2021-07-13 19:32:19,659 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:32:19,659 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:32:19,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:32:19,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:32:19,659 INFO L87 Difference]: Start difference. First operand 811 states and 2334 transitions. Second operand has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:32:20,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:32:20,555 INFO L93 Difference]: Finished difference Result 1032 states and 2765 transitions. [2021-07-13 19:32:20,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-07-13 19:32:20,555 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:32:20,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:32:20,557 INFO L225 Difference]: With dead ends: 1032 [2021-07-13 19:32:20,557 INFO L226 Difference]: Without dead ends: 1027 [2021-07-13 19:32:20,557 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 390 ImplicationChecksByTransitivity, 689.4ms TimeCoverageRelationStatistics Valid=200, Invalid=1440, Unknown=0, NotChecked=0, Total=1640 [2021-07-13 19:32:20,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1027 states. [2021-07-13 19:32:20,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1027 to 815. [2021-07-13 19:32:20,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 815 states, 814 states have (on average 2.8771498771498774) internal successors, (2342), 814 states have internal predecessors, (2342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:32:20,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 815 states to 815 states and 2342 transitions. [2021-07-13 19:32:20,567 INFO L78 Accepts]: Start accepts. Automaton has 815 states and 2342 transitions. Word has length 17 [2021-07-13 19:32:20,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:32:20,567 INFO L482 AbstractCegarLoop]: Abstraction has 815 states and 2342 transitions. [2021-07-13 19:32:20,567 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:32:20,567 INFO L276 IsEmpty]: Start isEmpty. Operand 815 states and 2342 transitions. [2021-07-13 19:32:20,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:32:20,568 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:32:20,568 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:32:20,768 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1831,270 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:32:20,769 INFO L430 AbstractCegarLoop]: === Iteration 280 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:32:20,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:32:20,769 INFO L82 PathProgramCache]: Analyzing trace with hash 1982779774, now seen corresponding path program 266 times [2021-07-13 19:32:20,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:32:20,769 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148823276] [2021-07-13 19:32:20,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:32:20,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:32:20,852 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:32:20,852 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:32:20,852 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148823276] [2021-07-13 19:32:20,852 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [148823276] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:32:20,852 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1467224760] [2021-07-13 19:32:20,852 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 271 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 271 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:32:20,887 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:32:20,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:32:20,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 19:32:20,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:32:20,970 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:32:20,970 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:32:20,970 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:32:20,971 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:32:20,973 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:32:20,973 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:32:20,974 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:32:20,975 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:32:20,977 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:32:20,977 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:32:20,977 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:32:20,978 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:32:20,980 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:32:20,980 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:32:20,981 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:32:21,013 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-07-13 19:32:21,013 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:32:21,013 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:32:21,013 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-07-13 19:32:21,060 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:32:21,060 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1467224760] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:32:21,061 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:32:21,061 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-13 19:32:21,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171334812] [2021-07-13 19:32:21,061 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:32:21,061 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:32:21,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:32:21,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:32:21,061 INFO L87 Difference]: Start difference. First operand 815 states and 2342 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:32:21,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:32:21,633 INFO L93 Difference]: Finished difference Result 1074 states and 2852 transitions. [2021-07-13 19:32:21,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-13 19:32:21,633 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:32:21,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:32:21,635 INFO L225 Difference]: With dead ends: 1074 [2021-07-13 19:32:21,635 INFO L226 Difference]: Without dead ends: 1074 [2021-07-13 19:32:21,635 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 493.8ms TimeCoverageRelationStatistics Valid=158, Invalid=1032, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 19:32:21,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1074 states. [2021-07-13 19:32:21,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1074 to 828. [2021-07-13 19:32:21,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 828 states, 827 states have (on average 2.8851269649334945) internal successors, (2386), 827 states have internal predecessors, (2386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:32:21,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 828 states to 828 states and 2386 transitions. [2021-07-13 19:32:21,650 INFO L78 Accepts]: Start accepts. Automaton has 828 states and 2386 transitions. Word has length 17 [2021-07-13 19:32:21,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:32:21,650 INFO L482 AbstractCegarLoop]: Abstraction has 828 states and 2386 transitions. [2021-07-13 19:32:21,650 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:32:21,650 INFO L276 IsEmpty]: Start isEmpty. Operand 828 states and 2386 transitions. [2021-07-13 19:32:21,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:32:21,651 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:32:21,651 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:32:21,851 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1836,271 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:32:21,851 INFO L430 AbstractCegarLoop]: === Iteration 281 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:32:21,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:32:21,852 INFO L82 PathProgramCache]: Analyzing trace with hash -1510571294, now seen corresponding path program 267 times [2021-07-13 19:32:21,852 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:32:21,852 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351241849] [2021-07-13 19:32:21,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:32:21,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:32:21,935 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:32:21,935 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:32:21,935 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351241849] [2021-07-13 19:32:21,935 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1351241849] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:32:21,935 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1642803926] [2021-07-13 19:32:21,935 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 272 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 272 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:32:21,963 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 19:32:21,964 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:32:21,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 19:32:21,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:32:22,040 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:32:22,041 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:32:22,041 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:32:22,042 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:32:22,044 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:32:22,044 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:32:22,044 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:32:22,045 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:32:22,047 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:32:22,048 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:32:22,048 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:32:22,049 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:32:22,051 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:32:22,051 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:32:22,051 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:32:22,083 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-07-13 19:32:22,083 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:32:22,084 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:32:22,084 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-07-13 19:32:22,152 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:32:22,152 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1642803926] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:32:22,152 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:32:22,152 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-13 19:32:22,152 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779947800] [2021-07-13 19:32:22,152 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:32:22,152 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:32:22,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:32:22,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:32:22,153 INFO L87 Difference]: Start difference. First operand 828 states and 2386 transitions. Second operand has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:32:23,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:32:23,097 INFO L93 Difference]: Finished difference Result 1059 states and 2837 transitions. [2021-07-13 19:32:23,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-07-13 19:32:23,097 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:32:23,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:32:23,099 INFO L225 Difference]: With dead ends: 1059 [2021-07-13 19:32:23,099 INFO L226 Difference]: Without dead ends: 1051 [2021-07-13 19:32:23,099 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 594 ImplicationChecksByTransitivity, 718.5ms TimeCoverageRelationStatistics Valid=226, Invalid=1936, Unknown=0, NotChecked=0, Total=2162 [2021-07-13 19:32:23,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1051 states. [2021-07-13 19:32:23,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1051 to 840. [2021-07-13 19:32:23,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 840 states, 839 states have (on average 2.8724672228843864) internal successors, (2410), 839 states have internal predecessors, (2410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:32:23,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 840 states to 840 states and 2410 transitions. [2021-07-13 19:32:23,109 INFO L78 Accepts]: Start accepts. Automaton has 840 states and 2410 transitions. Word has length 17 [2021-07-13 19:32:23,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:32:23,109 INFO L482 AbstractCegarLoop]: Abstraction has 840 states and 2410 transitions. [2021-07-13 19:32:23,109 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:32:23,109 INFO L276 IsEmpty]: Start isEmpty. Operand 840 states and 2410 transitions. [2021-07-13 19:32:23,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:32:23,110 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:32:23,110 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:32:23,311 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1840,272 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:32:23,311 INFO L430 AbstractCegarLoop]: === Iteration 282 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:32:23,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:32:23,311 INFO L82 PathProgramCache]: Analyzing trace with hash 207772412, now seen corresponding path program 268 times [2021-07-13 19:32:23,311 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:32:23,311 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211401399] [2021-07-13 19:32:23,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:32:23,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:32:23,397 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:32:23,398 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:32:23,398 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211401399] [2021-07-13 19:32:23,398 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211401399] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:32:23,398 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1680987480] [2021-07-13 19:32:23,398 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 273 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 273 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:32:23,423 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:32:23,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:32:23,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 19:32:23,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:32:23,508 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:32:23,508 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:32:23,508 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:32:23,509 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:32:23,518 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:32:23,518 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:32:23,518 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:32:23,520 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:32:23,522 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:32:23,523 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:32:23,523 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:32:23,524 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:32:23,526 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:32:23,526 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:32:23,527 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:32:23,561 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-07-13 19:32:23,561 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:32:23,562 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:32:23,562 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-07-13 19:32:23,610 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:32:23,610 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1680987480] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:32:23,610 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:32:23,610 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-13 19:32:23,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279932320] [2021-07-13 19:32:23,610 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:32:23,610 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:32:23,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:32:23,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:32:23,610 INFO L87 Difference]: Start difference. First operand 840 states and 2410 transitions. Second operand has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:32:24,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:32:24,229 INFO L93 Difference]: Finished difference Result 1048 states and 2825 transitions. [2021-07-13 19:32:24,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-13 19:32:24,230 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:32:24,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:32:24,231 INFO L225 Difference]: With dead ends: 1048 [2021-07-13 19:32:24,231 INFO L226 Difference]: Without dead ends: 1048 [2021-07-13 19:32:24,231 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 446.9ms TimeCoverageRelationStatistics Valid=138, Invalid=918, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 19:32:24,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1048 states. [2021-07-13 19:32:24,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1048 to 836. [2021-07-13 19:32:24,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 836 states, 835 states have (on average 2.867065868263473) internal successors, (2394), 835 states have internal predecessors, (2394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:32:24,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 836 states to 836 states and 2394 transitions. [2021-07-13 19:32:24,241 INFO L78 Accepts]: Start accepts. Automaton has 836 states and 2394 transitions. Word has length 17 [2021-07-13 19:32:24,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:32:24,241 INFO L482 AbstractCegarLoop]: Abstraction has 836 states and 2394 transitions. [2021-07-13 19:32:24,241 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:32:24,242 INFO L276 IsEmpty]: Start isEmpty. Operand 836 states and 2394 transitions. [2021-07-13 19:32:24,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:32:24,242 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:32:24,243 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:32:24,443 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1846,273 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:32:24,443 INFO L430 AbstractCegarLoop]: === Iteration 283 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:32:24,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:32:24,443 INFO L82 PathProgramCache]: Analyzing trace with hash -1502840896, now seen corresponding path program 269 times [2021-07-13 19:32:24,443 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:32:24,444 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478133893] [2021-07-13 19:32:24,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:32:24,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:32:24,530 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:32:24,531 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:32:24,531 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478133893] [2021-07-13 19:32:24,531 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1478133893] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:32:24,531 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [644094038] [2021-07-13 19:32:24,531 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 274 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 274 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:32:24,559 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-13 19:32:24,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:32:24,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 19:32:24,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:32:24,663 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:32:24,664 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:32:24,664 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:32:24,665 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:32:24,667 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:32:24,668 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:32:24,668 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:32:24,686 INFO L628 ElimStorePlain]: treesize reduction 30, result has 33.3 percent of original size [2021-07-13 19:32:24,686 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:32:24,686 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:32:24,686 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:59, output treesize:15 [2021-07-13 19:32:24,709 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:32:24,709 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [644094038] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:32:24,709 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:32:24,709 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-13 19:32:24,709 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387981186] [2021-07-13 19:32:24,709 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:32:24,709 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:32:24,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:32:24,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:32:24,710 INFO L87 Difference]: Start difference. First operand 836 states and 2394 transitions. Second operand has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:32:25,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:32:25,061 INFO L93 Difference]: Finished difference Result 1074 states and 2888 transitions. [2021-07-13 19:32:25,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 19:32:25,061 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:32:25,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:32:25,062 INFO L225 Difference]: With dead ends: 1074 [2021-07-13 19:32:25,062 INFO L226 Difference]: Without dead ends: 1074 [2021-07-13 19:32:25,063 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 256.0ms TimeCoverageRelationStatistics Valid=78, Invalid=572, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:32:25,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1074 states. [2021-07-13 19:32:25,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1074 to 836. [2021-07-13 19:32:25,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 836 states, 835 states have (on average 2.867065868263473) internal successors, (2394), 835 states have internal predecessors, (2394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:32:25,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 836 states to 836 states and 2394 transitions. [2021-07-13 19:32:25,073 INFO L78 Accepts]: Start accepts. Automaton has 836 states and 2394 transitions. Word has length 17 [2021-07-13 19:32:25,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:32:25,073 INFO L482 AbstractCegarLoop]: Abstraction has 836 states and 2394 transitions. [2021-07-13 19:32:25,073 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:32:25,073 INFO L276 IsEmpty]: Start isEmpty. Operand 836 states and 2394 transitions. [2021-07-13 19:32:25,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:32:25,074 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:32:25,074 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:32:25,274 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1850,274 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:32:25,275 INFO L430 AbstractCegarLoop]: === Iteration 284 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:32:25,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:32:25,275 INFO L82 PathProgramCache]: Analyzing trace with hash 1801815964, now seen corresponding path program 270 times [2021-07-13 19:32:25,275 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:32:25,275 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952067297] [2021-07-13 19:32:25,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:32:25,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:32:25,357 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:32:25,358 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:32:25,358 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952067297] [2021-07-13 19:32:25,358 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1952067297] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:32:25,358 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [897235295] [2021-07-13 19:32:25,358 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 275 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 275 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:32:25,385 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:32:25,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:32:25,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 19:32:25,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:32:25,524 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:32:25,525 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:32:25,525 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:32:25,525 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:32:25,528 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:32:25,528 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:32:25,528 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:32:25,550 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-07-13 19:32:25,550 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:32:25,550 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:32:25,551 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-07-13 19:32:25,570 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:32:25,570 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [897235295] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:32:25,570 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:32:25,571 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 19:32:25,571 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890583070] [2021-07-13 19:32:25,571 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:32:25,571 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:32:25,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:32:25,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:32:25,571 INFO L87 Difference]: Start difference. First operand 836 states and 2394 transitions. Second operand has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:32:25,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:32:25,806 INFO L93 Difference]: Finished difference Result 964 states and 2644 transitions. [2021-07-13 19:32:25,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 19:32:25,806 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:32:25,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:32:25,807 INFO L225 Difference]: With dead ends: 964 [2021-07-13 19:32:25,807 INFO L226 Difference]: Without dead ends: 964 [2021-07-13 19:32:25,807 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 173.0ms TimeCoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:32:25,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 964 states. [2021-07-13 19:32:25,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 964 to 861. [2021-07-13 19:32:25,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 861 states, 860 states have (on average 2.8686046511627907) internal successors, (2467), 860 states have internal predecessors, (2467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:32:25,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 861 states to 861 states and 2467 transitions. [2021-07-13 19:32:25,818 INFO L78 Accepts]: Start accepts. Automaton has 861 states and 2467 transitions. Word has length 17 [2021-07-13 19:32:25,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:32:25,818 INFO L482 AbstractCegarLoop]: Abstraction has 861 states and 2467 transitions. [2021-07-13 19:32:25,818 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:32:25,818 INFO L276 IsEmpty]: Start isEmpty. Operand 861 states and 2467 transitions. [2021-07-13 19:32:25,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:32:25,819 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:32:25,819 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:32:26,019 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1852,275 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:32:26,019 INFO L430 AbstractCegarLoop]: === Iteration 285 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:32:26,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:32:26,020 INFO L82 PathProgramCache]: Analyzing trace with hash -1562268744, now seen corresponding path program 271 times [2021-07-13 19:32:26,020 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:32:26,020 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698994302] [2021-07-13 19:32:26,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:32:26,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:32:26,097 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:32:26,097 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:32:26,097 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698994302] [2021-07-13 19:32:26,097 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [698994302] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:32:26,097 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1929601965] [2021-07-13 19:32:26,097 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 276 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 276 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:32:26,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:32:26,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 19:32:26,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:32:26,293 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:32:26,294 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:32:26,294 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:32:26,295 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:32:26,297 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:32:26,298 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:32:26,300 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:32:26,301 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:32:26,303 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:32:26,304 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:32:26,306 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:32:26,306 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:32:26,309 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:32:26,309 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:32:26,310 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:32:26,339 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-07-13 19:32:26,339 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:32:26,340 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:32:26,340 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-07-13 19:32:26,367 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:32:26,367 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1929601965] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:32:26,367 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:32:26,367 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 19:32:26,367 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772787646] [2021-07-13 19:32:26,367 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:32:26,367 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:32:26,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:32:26,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:32:26,368 INFO L87 Difference]: Start difference. First operand 861 states and 2467 transitions. Second operand has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:32:26,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:32:26,833 INFO L93 Difference]: Finished difference Result 945 states and 2596 transitions. [2021-07-13 19:32:26,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 19:32:26,833 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:32:26,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:32:26,835 INFO L225 Difference]: With dead ends: 945 [2021-07-13 19:32:26,835 INFO L226 Difference]: Without dead ends: 937 [2021-07-13 19:32:26,835 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 422.0ms TimeCoverageRelationStatistics Valid=97, Invalid=773, Unknown=0, NotChecked=0, Total=870 [2021-07-13 19:32:26,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 937 states. [2021-07-13 19:32:26,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 937 to 866. [2021-07-13 19:32:26,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 866 states, 865 states have (on average 2.8578034682080924) internal successors, (2472), 865 states have internal predecessors, (2472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:32:26,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 866 states to 866 states and 2472 transitions. [2021-07-13 19:32:26,844 INFO L78 Accepts]: Start accepts. Automaton has 866 states and 2472 transitions. Word has length 17 [2021-07-13 19:32:26,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:32:26,844 INFO L482 AbstractCegarLoop]: Abstraction has 866 states and 2472 transitions. [2021-07-13 19:32:26,844 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:32:26,844 INFO L276 IsEmpty]: Start isEmpty. Operand 866 states and 2472 transitions. [2021-07-13 19:32:26,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:32:26,845 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:32:26,845 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:32:27,046 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 276 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1855 [2021-07-13 19:32:27,046 INFO L430 AbstractCegarLoop]: === Iteration 286 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:32:27,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:32:27,046 INFO L82 PathProgramCache]: Analyzing trace with hash 640793850, now seen corresponding path program 272 times [2021-07-13 19:32:27,046 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:32:27,046 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679318219] [2021-07-13 19:32:27,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:32:27,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:32:27,123 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:32:27,123 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:32:27,123 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679318219] [2021-07-13 19:32:27,123 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [679318219] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:32:27,123 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1101369888] [2021-07-13 19:32:27,123 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 277 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 277 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:32:27,150 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:32:27,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:32:27,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 19:32:27,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:32:27,300 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:32:27,300 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:32:27,301 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:32:27,301 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:32:27,303 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:32:27,304 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:32:27,304 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:32:27,325 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-07-13 19:32:27,325 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:32:27,326 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:32:27,326 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-07-13 19:32:27,346 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:32:27,346 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1101369888] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:32:27,346 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:32:27,346 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 19:32:27,346 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301223230] [2021-07-13 19:32:27,346 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:32:27,346 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:32:27,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:32:27,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:32:27,347 INFO L87 Difference]: Start difference. First operand 866 states and 2472 transitions. Second operand has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:32:28,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:32:28,244 INFO L93 Difference]: Finished difference Result 1023 states and 2750 transitions. [2021-07-13 19:32:28,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-07-13 19:32:28,244 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:32:28,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:32:28,245 INFO L225 Difference]: With dead ends: 1023 [2021-07-13 19:32:28,245 INFO L226 Difference]: Without dead ends: 1023 [2021-07-13 19:32:28,246 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 445 ImplicationChecksByTransitivity, 780.4ms TimeCoverageRelationStatistics Valid=243, Invalid=1649, Unknown=0, NotChecked=0, Total=1892 [2021-07-13 19:32:28,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1023 states. [2021-07-13 19:32:28,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1023 to 862. [2021-07-13 19:32:28,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 862 states, 861 states have (on average 2.8664343786295006) internal successors, (2468), 861 states have internal predecessors, (2468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:32:28,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 862 states to 862 states and 2468 transitions. [2021-07-13 19:32:28,256 INFO L78 Accepts]: Start accepts. Automaton has 862 states and 2468 transitions. Word has length 17 [2021-07-13 19:32:28,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:32:28,256 INFO L482 AbstractCegarLoop]: Abstraction has 862 states and 2468 transitions. [2021-07-13 19:32:28,256 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:32:28,256 INFO L276 IsEmpty]: Start isEmpty. Operand 862 states and 2468 transitions. [2021-07-13 19:32:28,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:32:28,257 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:32:28,257 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:32:28,457 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 277 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1862 [2021-07-13 19:32:28,457 INFO L430 AbstractCegarLoop]: === Iteration 287 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:32:28,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:32:28,458 INFO L82 PathProgramCache]: Analyzing trace with hash -2100124322, now seen corresponding path program 273 times [2021-07-13 19:32:28,458 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:32:28,458 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104038856] [2021-07-13 19:32:28,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:32:28,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:32:28,542 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:32:28,542 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:32:28,542 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104038856] [2021-07-13 19:32:28,542 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1104038856] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:32:28,542 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [647123491] [2021-07-13 19:32:28,542 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 278 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 278 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:32:28,569 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:32:28,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:32:28,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 19:32:28,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:32:28,749 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:32:28,749 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:32:28,750 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:32:28,750 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:32:28,753 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:32:28,753 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:32:28,756 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:32:28,756 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:32:28,759 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:32:28,759 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:32:28,762 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:32:28,762 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:32:28,764 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:32:28,765 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:32:28,766 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:32:28,794 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-07-13 19:32:28,795 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:32:28,795 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:32:28,795 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-07-13 19:32:28,822 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:32:28,822 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [647123491] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:32:28,822 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:32:28,822 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 19:32:28,822 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17590352] [2021-07-13 19:32:28,823 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:32:28,823 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:32:28,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:32:28,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:32:28,823 INFO L87 Difference]: Start difference. First operand 862 states and 2468 transitions. Second operand has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:32:29,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:32:29,381 INFO L93 Difference]: Finished difference Result 947 states and 2603 transitions. [2021-07-13 19:32:29,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-13 19:32:29,381 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:32:29,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:32:29,383 INFO L225 Difference]: With dead ends: 947 [2021-07-13 19:32:29,383 INFO L226 Difference]: Without dead ends: 944 [2021-07-13 19:32:29,383 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 560.7ms TimeCoverageRelationStatistics Valid=137, Invalid=985, Unknown=0, NotChecked=0, Total=1122 [2021-07-13 19:32:29,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 944 states. [2021-07-13 19:32:29,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 944 to 865. [2021-07-13 19:32:29,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 865 states, 864 states have (on average 2.8622685185185186) internal successors, (2473), 864 states have internal predecessors, (2473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:32:29,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 865 states to 865 states and 2473 transitions. [2021-07-13 19:32:29,392 INFO L78 Accepts]: Start accepts. Automaton has 865 states and 2473 transitions. Word has length 17 [2021-07-13 19:32:29,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:32:29,392 INFO L482 AbstractCegarLoop]: Abstraction has 865 states and 2473 transitions. [2021-07-13 19:32:29,392 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:32:29,392 INFO L276 IsEmpty]: Start isEmpty. Operand 865 states and 2473 transitions. [2021-07-13 19:32:29,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:32:29,393 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:32:29,393 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:32:29,594 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 278 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1865 [2021-07-13 19:32:29,594 INFO L430 AbstractCegarLoop]: === Iteration 288 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:32:29,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:32:29,594 INFO L82 PathProgramCache]: Analyzing trace with hash 880436188, now seen corresponding path program 274 times [2021-07-13 19:32:29,594 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:32:29,594 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981648978] [2021-07-13 19:32:29,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:32:29,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:32:29,675 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:32:29,675 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:32:29,675 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981648978] [2021-07-13 19:32:29,675 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [981648978] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:32:29,675 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [449517141] [2021-07-13 19:32:29,675 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 279 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 279 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:32:29,701 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:32:29,701 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:32:29,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 19:32:29,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:32:29,847 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:32:29,848 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:32:29,848 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:32:29,849 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:32:29,851 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:32:29,851 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:32:29,852 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:32:29,873 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-07-13 19:32:29,873 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:32:29,874 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:32:29,874 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-07-13 19:32:29,893 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:32:29,894 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [449517141] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:32:29,894 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:32:29,894 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 19:32:29,894 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935834450] [2021-07-13 19:32:29,894 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:32:29,894 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:32:29,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:32:29,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:32:29,894 INFO L87 Difference]: Start difference. First operand 865 states and 2473 transitions. Second operand has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:32:30,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:32:30,682 INFO L93 Difference]: Finished difference Result 1010 states and 2733 transitions. [2021-07-13 19:32:30,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-13 19:32:30,683 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:32:30,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:32:30,684 INFO L225 Difference]: With dead ends: 1010 [2021-07-13 19:32:30,684 INFO L226 Difference]: Without dead ends: 1010 [2021-07-13 19:32:30,684 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 575.6ms TimeCoverageRelationStatistics Valid=161, Invalid=1099, Unknown=0, NotChecked=0, Total=1260 [2021-07-13 19:32:30,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1010 states. [2021-07-13 19:32:30,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1010 to 862. [2021-07-13 19:32:30,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 862 states, 861 states have (on average 2.8710801393728222) internal successors, (2472), 861 states have internal predecessors, (2472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:32:30,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 862 states to 862 states and 2472 transitions. [2021-07-13 19:32:30,694 INFO L78 Accepts]: Start accepts. Automaton has 862 states and 2472 transitions. Word has length 17 [2021-07-13 19:32:30,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:32:30,694 INFO L482 AbstractCegarLoop]: Abstraction has 862 states and 2472 transitions. [2021-07-13 19:32:30,695 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:32:30,695 INFO L276 IsEmpty]: Start isEmpty. Operand 862 states and 2472 transitions. [2021-07-13 19:32:30,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:32:30,696 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:32:30,696 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:32:30,896 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1872,279 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:32:30,896 INFO L430 AbstractCegarLoop]: === Iteration 289 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:32:30,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:32:30,896 INFO L82 PathProgramCache]: Analyzing trace with hash -39264520, now seen corresponding path program 275 times [2021-07-13 19:32:30,896 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:32:30,896 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543385301] [2021-07-13 19:32:30,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:32:30,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:32:30,979 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:32:30,979 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:32:30,979 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543385301] [2021-07-13 19:32:30,979 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1543385301] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:32:30,979 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1925750073] [2021-07-13 19:32:30,979 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 280 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 280 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:32:31,007 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:32:31,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:32:31,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 19:32:31,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:32:31,160 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:32:31,161 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:32:31,161 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:32:31,162 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:32:31,164 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:32:31,165 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:32:31,167 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:32:31,168 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:32:31,170 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:32:31,171 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:32:31,173 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:32:31,174 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:32:31,176 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:32:31,176 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:32:31,177 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:32:31,206 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-07-13 19:32:31,207 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:32:31,207 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:32:31,208 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-07-13 19:32:31,235 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:32:31,235 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1925750073] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:32:31,235 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:32:31,235 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 19:32:31,235 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826495260] [2021-07-13 19:32:31,235 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:32:31,235 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:32:31,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:32:31,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:32:31,236 INFO L87 Difference]: Start difference. First operand 862 states and 2472 transitions. Second operand has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:32:31,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:32:31,628 INFO L93 Difference]: Finished difference Result 902 states and 2550 transitions. [2021-07-13 19:32:31,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 19:32:31,629 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:32:31,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:32:31,630 INFO L225 Difference]: With dead ends: 902 [2021-07-13 19:32:31,630 INFO L226 Difference]: Without dead ends: 898 [2021-07-13 19:32:31,630 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 389.2ms TimeCoverageRelationStatistics Valid=88, Invalid=562, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:32:31,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 898 states. [2021-07-13 19:32:31,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 898 to 863. [2021-07-13 19:32:31,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 863 states, 862 states have (on average 2.8677494199535962) internal successors, (2472), 862 states have internal predecessors, (2472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:32:31,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 863 states to 863 states and 2472 transitions. [2021-07-13 19:32:31,639 INFO L78 Accepts]: Start accepts. Automaton has 863 states and 2472 transitions. Word has length 17 [2021-07-13 19:32:31,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:32:31,639 INFO L482 AbstractCegarLoop]: Abstraction has 863 states and 2472 transitions. [2021-07-13 19:32:31,639 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:32:31,639 INFO L276 IsEmpty]: Start isEmpty. Operand 863 states and 2472 transitions. [2021-07-13 19:32:31,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:32:31,640 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:32:31,641 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:32:31,841 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1875,280 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:32:31,841 INFO L430 AbstractCegarLoop]: === Iteration 290 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:32:31,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:32:31,841 INFO L82 PathProgramCache]: Analyzing trace with hash 888166586, now seen corresponding path program 276 times [2021-07-13 19:32:31,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:32:31,841 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803636271] [2021-07-13 19:32:31,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:32:31,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:32:31,930 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:32:31,930 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:32:31,930 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803636271] [2021-07-13 19:32:31,930 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1803636271] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:32:31,930 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1854087487] [2021-07-13 19:32:31,930 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 281 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 281 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:32:31,956 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:32:31,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:32:31,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 19:32:31,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:32:32,066 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:32:32,067 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:32:32,067 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:32:32,068 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:32:32,070 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:32:32,070 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:32:32,070 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:32:32,071 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:32:32,074 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:32:32,074 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:32:32,074 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:32:32,075 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:32:32,077 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:32:32,077 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:32:32,078 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:32:32,110 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-07-13 19:32:32,110 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:32:32,110 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:32:32,111 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-07-13 19:32:32,160 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:32:32,160 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1854087487] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:32:32,160 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:32:32,160 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 19:32:32,160 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930464170] [2021-07-13 19:32:32,160 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:32:32,160 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:32:32,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:32:32,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:32:32,161 INFO L87 Difference]: Start difference. First operand 863 states and 2472 transitions. Second operand has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:32:32,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:32:32,692 INFO L93 Difference]: Finished difference Result 1025 states and 2754 transitions. [2021-07-13 19:32:32,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 19:32:32,692 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:32:32,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:32:32,694 INFO L225 Difference]: With dead ends: 1025 [2021-07-13 19:32:32,694 INFO L226 Difference]: Without dead ends: 1025 [2021-07-13 19:32:32,694 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 480.0ms TimeCoverageRelationStatistics Valid=123, Invalid=747, Unknown=0, NotChecked=0, Total=870 [2021-07-13 19:32:32,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1025 states. [2021-07-13 19:32:32,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1025 to 853. [2021-07-13 19:32:32,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 853 states, 852 states have (on average 2.8615023474178405) internal successors, (2438), 852 states have internal predecessors, (2438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:32:32,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 853 states to 853 states and 2438 transitions. [2021-07-13 19:32:32,704 INFO L78 Accepts]: Start accepts. Automaton has 853 states and 2438 transitions. Word has length 17 [2021-07-13 19:32:32,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:32:32,704 INFO L482 AbstractCegarLoop]: Abstraction has 853 states and 2438 transitions. [2021-07-13 19:32:32,704 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:32:32,704 INFO L276 IsEmpty]: Start isEmpty. Operand 853 states and 2438 transitions. [2021-07-13 19:32:32,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:32:32,705 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:32:32,705 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:32:32,905 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 281 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1882 [2021-07-13 19:32:32,906 INFO L430 AbstractCegarLoop]: === Iteration 291 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:32:32,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:32:32,906 INFO L82 PathProgramCache]: Analyzing trace with hash 1689782814, now seen corresponding path program 277 times [2021-07-13 19:32:32,906 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:32:32,906 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451938144] [2021-07-13 19:32:32,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:32:32,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:32:32,994 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:32:32,994 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:32:32,994 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451938144] [2021-07-13 19:32:32,994 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1451938144] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:32:32,994 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2113329260] [2021-07-13 19:32:32,994 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 282 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 282 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:32:33,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:32:33,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 19:32:33,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:32:33,139 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:32:33,140 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:32:33,140 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:32:33,141 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:32:33,143 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:32:33,143 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:32:33,143 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:32:33,144 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:32:33,147 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:32:33,147 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:32:33,147 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:32:33,148 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:32:33,150 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:32:33,150 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:32:33,151 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:32:33,183 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-07-13 19:32:33,183 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:32:33,184 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:32:33,184 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-07-13 19:32:33,253 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:32:33,254 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2113329260] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:32:33,254 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:32:33,254 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 19:32:33,254 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385581659] [2021-07-13 19:32:33,254 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:32:33,254 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:32:33,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:32:33,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:32:33,254 INFO L87 Difference]: Start difference. First operand 853 states and 2438 transitions. Second operand has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:32:33,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:32:33,938 INFO L93 Difference]: Finished difference Result 987 states and 2678 transitions. [2021-07-13 19:32:33,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-13 19:32:33,938 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:32:33,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:32:33,940 INFO L225 Difference]: With dead ends: 987 [2021-07-13 19:32:33,940 INFO L226 Difference]: Without dead ends: 983 [2021-07-13 19:32:33,940 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 602.1ms TimeCoverageRelationStatistics Valid=140, Invalid=982, Unknown=0, NotChecked=0, Total=1122 [2021-07-13 19:32:33,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 983 states. [2021-07-13 19:32:33,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 983 to 866. [2021-07-13 19:32:33,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 866 states, 865 states have (on average 2.871676300578035) internal successors, (2484), 865 states have internal predecessors, (2484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:32:33,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 866 states to 866 states and 2484 transitions. [2021-07-13 19:32:33,951 INFO L78 Accepts]: Start accepts. Automaton has 866 states and 2484 transitions. Word has length 17 [2021-07-13 19:32:33,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:32:33,951 INFO L482 AbstractCegarLoop]: Abstraction has 866 states and 2484 transitions. [2021-07-13 19:32:33,951 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:32:33,951 INFO L276 IsEmpty]: Start isEmpty. Operand 866 states and 2484 transitions. [2021-07-13 19:32:33,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:32:33,952 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:32:33,952 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:32:34,154 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1886,282 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:32:34,154 INFO L430 AbstractCegarLoop]: === Iteration 292 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:32:34,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:32:34,154 INFO L82 PathProgramCache]: Analyzing trace with hash -886840776, now seen corresponding path program 278 times [2021-07-13 19:32:34,154 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:32:34,154 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842943667] [2021-07-13 19:32:34,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:32:34,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:32:34,242 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:32:34,242 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:32:34,242 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842943667] [2021-07-13 19:32:34,242 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [842943667] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:32:34,242 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [399763885] [2021-07-13 19:32:34,243 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 283 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 283 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:32:34,268 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:32:34,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:32:34,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 19:32:34,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:32:34,390 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:32:34,390 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:32:34,391 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:32:34,391 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:32:34,393 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:32:34,394 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:32:34,394 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:32:34,395 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:32:34,397 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:32:34,397 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:32:34,398 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:32:34,398 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:32:34,400 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:32:34,400 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:32:34,401 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:32:34,433 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-07-13 19:32:34,433 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:32:34,434 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:32:34,434 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-07-13 19:32:34,483 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:32:34,483 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [399763885] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:32:34,484 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:32:34,484 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 19:32:34,484 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890583104] [2021-07-13 19:32:34,484 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:32:34,484 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:32:34,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:32:34,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:32:34,484 INFO L87 Difference]: Start difference. First operand 866 states and 2484 transitions. Second operand has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:32:34,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:32:34,805 INFO L93 Difference]: Finished difference Result 970 states and 2653 transitions. [2021-07-13 19:32:34,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 19:32:34,806 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:32:34,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:32:34,807 INFO L225 Difference]: With dead ends: 970 [2021-07-13 19:32:34,807 INFO L226 Difference]: Without dead ends: 970 [2021-07-13 19:32:34,807 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 330.5ms TimeCoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:32:34,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 970 states. [2021-07-13 19:32:34,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 970 to 859. [2021-07-13 19:32:34,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 859 states, 858 states have (on average 2.865967365967366) internal successors, (2459), 858 states have internal predecessors, (2459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:32:34,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 859 states to 859 states and 2459 transitions. [2021-07-13 19:32:34,817 INFO L78 Accepts]: Start accepts. Automaton has 859 states and 2459 transitions. Word has length 17 [2021-07-13 19:32:34,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:32:34,817 INFO L482 AbstractCegarLoop]: Abstraction has 859 states and 2459 transitions. [2021-07-13 19:32:34,817 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:32:34,817 INFO L276 IsEmpty]: Start isEmpty. Operand 859 states and 2459 transitions. [2021-07-13 19:32:34,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:32:34,818 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:32:34,818 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:32:35,018 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 283 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1892 [2021-07-13 19:32:35,018 INFO L430 AbstractCegarLoop]: === Iteration 293 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:32:35,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:32:35,019 INFO L82 PathProgramCache]: Analyzing trace with hash -10398598, now seen corresponding path program 279 times [2021-07-13 19:32:35,019 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:32:35,019 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591150921] [2021-07-13 19:32:35,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:32:35,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:32:35,085 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:32:35,085 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:32:35,085 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591150921] [2021-07-13 19:32:35,085 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [591150921] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:32:35,085 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [976589850] [2021-07-13 19:32:35,085 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 284 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 284 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:32:35,113 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:32:35,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:32:35,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 19:32:35,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:32:35,261 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:32:35,261 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:32:35,262 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:32:35,262 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:32:35,264 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:32:35,265 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:32:35,265 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:32:35,286 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-07-13 19:32:35,286 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:32:35,287 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:32:35,287 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-07-13 19:32:35,305 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:32:35,305 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [976589850] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:32:35,306 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:32:35,306 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-07-13 19:32:35,306 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66875414] [2021-07-13 19:32:35,306 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:32:35,306 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:32:35,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:32:35,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:32:35,306 INFO L87 Difference]: Start difference. First operand 859 states and 2459 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:32:35,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:32:35,598 INFO L93 Difference]: Finished difference Result 996 states and 2738 transitions. [2021-07-13 19:32:35,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 19:32:35,598 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:32:35,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:32:35,600 INFO L225 Difference]: With dead ends: 996 [2021-07-13 19:32:35,600 INFO L226 Difference]: Without dead ends: 996 [2021-07-13 19:32:35,600 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 167.0ms TimeCoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:32:35,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 996 states. [2021-07-13 19:32:35,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 996 to 875. [2021-07-13 19:32:35,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 875 states, 874 states have (on average 2.871853546910755) internal successors, (2510), 874 states have internal predecessors, (2510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:32:35,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 875 states to 875 states and 2510 transitions. [2021-07-13 19:32:35,610 INFO L78 Accepts]: Start accepts. Automaton has 875 states and 2510 transitions. Word has length 17 [2021-07-13 19:32:35,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:32:35,610 INFO L482 AbstractCegarLoop]: Abstraction has 875 states and 2510 transitions. [2021-07-13 19:32:35,610 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:32:35,610 INFO L276 IsEmpty]: Start isEmpty. Operand 875 states and 2510 transitions. [2021-07-13 19:32:35,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:32:35,611 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:32:35,611 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:32:35,812 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1896,284 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:32:35,812 INFO L430 AbstractCegarLoop]: === Iteration 294 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:32:35,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:32:35,812 INFO L82 PathProgramCache]: Analyzing trace with hash 1543650526, now seen corresponding path program 280 times [2021-07-13 19:32:35,812 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:32:35,812 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389267531] [2021-07-13 19:32:35,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:32:35,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:32:35,893 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:32:35,893 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:32:35,893 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389267531] [2021-07-13 19:32:35,893 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [389267531] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:32:35,893 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1288906607] [2021-07-13 19:32:35,893 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 285 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 285 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:32:35,926 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:32:35,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:32:35,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 19:32:35,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:32:36,069 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:32:36,070 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:32:36,070 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:32:36,071 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:32:36,073 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:32:36,074 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:32:36,076 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:32:36,077 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:32:36,079 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:32:36,080 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:32:36,082 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:32:36,083 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:32:36,085 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:32:36,085 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:32:36,086 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:32:36,121 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-07-13 19:32:36,121 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:32:36,122 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:32:36,122 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-07-13 19:32:36,148 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:32:36,148 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1288906607] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:32:36,149 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:32:36,149 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-07-13 19:32:36,149 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568142328] [2021-07-13 19:32:36,149 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:32:36,149 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:32:36,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:32:36,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:32:36,149 INFO L87 Difference]: Start difference. First operand 875 states and 2510 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:32:36,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:32:36,550 INFO L93 Difference]: Finished difference Result 943 states and 2624 transitions. [2021-07-13 19:32:36,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-13 19:32:36,550 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:32:36,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:32:36,552 INFO L225 Difference]: With dead ends: 943 [2021-07-13 19:32:36,552 INFO L226 Difference]: Without dead ends: 937 [2021-07-13 19:32:36,552 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 382.1ms TimeCoverageRelationStatistics Valid=97, Invalid=715, Unknown=0, NotChecked=0, Total=812 [2021-07-13 19:32:36,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 937 states. [2021-07-13 19:32:36,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 937 to 876. [2021-07-13 19:32:36,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 876 states, 875 states have (on average 2.865142857142857) internal successors, (2507), 875 states have internal predecessors, (2507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:32:36,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 876 states to 876 states and 2507 transitions. [2021-07-13 19:32:36,562 INFO L78 Accepts]: Start accepts. Automaton has 876 states and 2507 transitions. Word has length 17 [2021-07-13 19:32:36,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:32:36,562 INFO L482 AbstractCegarLoop]: Abstraction has 876 states and 2507 transitions. [2021-07-13 19:32:36,562 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:32:36,562 INFO L276 IsEmpty]: Start isEmpty. Operand 876 states and 2507 transitions. [2021-07-13 19:32:36,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:32:36,563 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:32:36,563 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:32:36,764 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 285 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1899 [2021-07-13 19:32:36,764 INFO L430 AbstractCegarLoop]: === Iteration 295 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:32:36,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:32:36,764 INFO L82 PathProgramCache]: Analyzing trace with hash 229243740, now seen corresponding path program 281 times [2021-07-13 19:32:36,764 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:32:36,765 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829427778] [2021-07-13 19:32:36,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:32:36,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:32:36,836 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:32:36,836 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:32:36,836 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829427778] [2021-07-13 19:32:36,836 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1829427778] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:32:36,836 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [525279043] [2021-07-13 19:32:36,836 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 286 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 286 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:32:36,864 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:32:36,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:32:36,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 19:32:36,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:32:37,006 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:32:37,006 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:32:37,006 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:32:37,007 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:32:37,009 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:32:37,009 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:32:37,010 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:32:37,037 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-07-13 19:32:37,037 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:32:37,038 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:32:37,038 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-07-13 19:32:37,057 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:32:37,057 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [525279043] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:32:37,057 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:32:37,057 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-07-13 19:32:37,057 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35780742] [2021-07-13 19:32:37,057 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:32:37,057 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:32:37,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:32:37,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:32:37,058 INFO L87 Difference]: Start difference. First operand 876 states and 2507 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:32:37,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:32:37,594 INFO L93 Difference]: Finished difference Result 1010 states and 2764 transitions. [2021-07-13 19:32:37,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-13 19:32:37,594 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:32:37,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:32:37,596 INFO L225 Difference]: With dead ends: 1010 [2021-07-13 19:32:37,596 INFO L226 Difference]: Without dead ends: 1010 [2021-07-13 19:32:37,596 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 489.2ms TimeCoverageRelationStatistics Valid=134, Invalid=858, Unknown=0, NotChecked=0, Total=992 [2021-07-13 19:32:37,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1010 states. [2021-07-13 19:32:37,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1010 to 878. [2021-07-13 19:32:37,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 878 states, 877 states have (on average 2.8677309007981755) internal successors, (2515), 877 states have internal predecessors, (2515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:32:37,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 878 states to 878 states and 2515 transitions. [2021-07-13 19:32:37,606 INFO L78 Accepts]: Start accepts. Automaton has 878 states and 2515 transitions. Word has length 17 [2021-07-13 19:32:37,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:32:37,606 INFO L482 AbstractCegarLoop]: Abstraction has 878 states and 2515 transitions. [2021-07-13 19:32:37,606 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:32:37,606 INFO L276 IsEmpty]: Start isEmpty. Operand 878 states and 2515 transitions. [2021-07-13 19:32:37,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:32:37,607 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:32:37,607 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:32:37,807 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1906,286 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:32:37,808 INFO L430 AbstractCegarLoop]: === Iteration 296 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:32:37,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:32:37,808 INFO L82 PathProgramCache]: Analyzing trace with hash -690456968, now seen corresponding path program 282 times [2021-07-13 19:32:37,808 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:32:37,808 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307786577] [2021-07-13 19:32:37,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:32:37,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:32:37,877 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:32:37,877 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:32:37,877 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307786577] [2021-07-13 19:32:37,877 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1307786577] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:32:37,877 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [89486127] [2021-07-13 19:32:37,877 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 287 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 287 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:32:37,904 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:32:37,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:32:37,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 19:32:37,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:32:38,050 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:32:38,051 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:32:38,051 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:32:38,052 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:32:38,054 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:32:38,055 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:32:38,057 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:32:38,058 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:32:38,060 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:32:38,061 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:32:38,063 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:32:38,064 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:32:38,066 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:32:38,066 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:32:38,067 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:32:38,096 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-07-13 19:32:38,096 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:32:38,097 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:32:38,097 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-07-13 19:32:38,123 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:32:38,123 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [89486127] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:32:38,123 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:32:38,123 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-07-13 19:32:38,123 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781727731] [2021-07-13 19:32:38,123 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:32:38,123 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:32:38,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:32:38,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:32:38,124 INFO L87 Difference]: Start difference. First operand 878 states and 2515 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:32:38,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:32:38,642 INFO L93 Difference]: Finished difference Result 942 states and 2631 transitions. [2021-07-13 19:32:38,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 19:32:38,642 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:32:38,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:32:38,644 INFO L225 Difference]: With dead ends: 942 [2021-07-13 19:32:38,644 INFO L226 Difference]: Without dead ends: 938 [2021-07-13 19:32:38,644 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 470.3ms TimeCoverageRelationStatistics Valid=122, Invalid=808, Unknown=0, NotChecked=0, Total=930 [2021-07-13 19:32:38,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 938 states. [2021-07-13 19:32:38,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 938 to 881. [2021-07-13 19:32:38,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 881 states, 880 states have (on average 2.8625) internal successors, (2519), 880 states have internal predecessors, (2519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:32:38,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 881 states to 881 states and 2519 transitions. [2021-07-13 19:32:38,654 INFO L78 Accepts]: Start accepts. Automaton has 881 states and 2519 transitions. Word has length 17 [2021-07-13 19:32:38,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:32:38,654 INFO L482 AbstractCegarLoop]: Abstraction has 881 states and 2519 transitions. [2021-07-13 19:32:38,654 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:32:38,654 INFO L276 IsEmpty]: Start isEmpty. Operand 881 states and 2519 transitions. [2021-07-13 19:32:38,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:32:38,655 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:32:38,655 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:32:38,855 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 287 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1909 [2021-07-13 19:32:38,855 INFO L430 AbstractCegarLoop]: === Iteration 297 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:32:38,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:32:38,856 INFO L82 PathProgramCache]: Analyzing trace with hash 236974138, now seen corresponding path program 283 times [2021-07-13 19:32:38,856 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:32:38,856 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222637572] [2021-07-13 19:32:38,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:32:38,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:32:38,935 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:32:38,935 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:32:38,935 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222637572] [2021-07-13 19:32:38,935 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [222637572] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:32:38,935 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1026518492] [2021-07-13 19:32:38,935 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 288 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 288 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:32:38,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:32:38,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 19:32:38,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:32:39,061 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:32:39,062 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:32:39,062 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:32:39,063 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:32:39,065 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:32:39,065 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:32:39,066 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:32:39,067 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:32:39,069 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:32:39,069 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:32:39,069 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:32:39,070 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:32:39,072 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:32:39,072 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:32:39,073 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:32:39,105 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-07-13 19:32:39,105 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:32:39,105 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:32:39,106 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-07-13 19:32:39,152 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:32:39,152 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1026518492] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:32:39,152 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:32:39,152 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-07-13 19:32:39,152 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282494861] [2021-07-13 19:32:39,152 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:32:39,153 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:32:39,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:32:39,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:32:39,153 INFO L87 Difference]: Start difference. First operand 881 states and 2519 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:32:39,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:32:39,715 INFO L93 Difference]: Finished difference Result 1004 states and 2739 transitions. [2021-07-13 19:32:39,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-13 19:32:39,715 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:32:39,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:32:39,716 INFO L225 Difference]: With dead ends: 1004 [2021-07-13 19:32:39,716 INFO L226 Difference]: Without dead ends: 1000 [2021-07-13 19:32:39,716 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 493.2ms TimeCoverageRelationStatistics Valid=142, Invalid=788, Unknown=0, NotChecked=0, Total=930 [2021-07-13 19:32:39,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1000 states. [2021-07-13 19:32:39,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1000 to 868. [2021-07-13 19:32:39,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 868 states, 867 states have (on average 2.847750865051903) internal successors, (2469), 867 states have internal predecessors, (2469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:32:39,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 868 states to 868 states and 2469 transitions. [2021-07-13 19:32:39,727 INFO L78 Accepts]: Start accepts. Automaton has 868 states and 2469 transitions. Word has length 17 [2021-07-13 19:32:39,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:32:39,727 INFO L482 AbstractCegarLoop]: Abstraction has 868 states and 2469 transitions. [2021-07-13 19:32:39,727 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:32:39,727 INFO L276 IsEmpty]: Start isEmpty. Operand 868 states and 2469 transitions. [2021-07-13 19:32:39,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:32:39,728 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:32:39,728 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:32:39,929 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1916,288 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:32:39,929 INFO L430 AbstractCegarLoop]: === Iteration 298 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:32:39,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:32:39,929 INFO L82 PathProgramCache]: Analyzing trace with hash 1038590366, now seen corresponding path program 284 times [2021-07-13 19:32:39,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:32:39,929 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925363230] [2021-07-13 19:32:39,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:32:39,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:32:40,003 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:32:40,004 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:32:40,004 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925363230] [2021-07-13 19:32:40,004 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [925363230] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:32:40,004 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2119825378] [2021-07-13 19:32:40,004 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 289 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 289 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:32:40,031 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:32:40,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:32:40,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 19:32:40,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:32:40,128 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:32:40,129 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:32:40,129 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:32:40,130 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:32:40,132 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:32:40,132 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:32:40,132 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:32:40,133 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:32:40,135 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:32:40,136 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:32:40,136 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:32:40,137 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:32:40,139 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:32:40,139 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:32:40,139 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:32:40,174 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-07-13 19:32:40,174 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:32:40,175 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:32:40,175 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-07-13 19:32:40,239 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:32:40,240 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2119825378] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:32:40,240 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:32:40,240 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-07-13 19:32:40,240 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196651662] [2021-07-13 19:32:40,240 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:32:40,240 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:32:40,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:32:40,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:32:40,240 INFO L87 Difference]: Start difference. First operand 868 states and 2469 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:32:40,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:32:40,709 INFO L93 Difference]: Finished difference Result 951 states and 2639 transitions. [2021-07-13 19:32:40,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-13 19:32:40,709 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:32:40,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:32:40,710 INFO L225 Difference]: With dead ends: 951 [2021-07-13 19:32:40,710 INFO L226 Difference]: Without dead ends: 946 [2021-07-13 19:32:40,710 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 454.6ms TimeCoverageRelationStatistics Valid=137, Invalid=855, Unknown=0, NotChecked=0, Total=992 [2021-07-13 19:32:40,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 946 states. [2021-07-13 19:32:40,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 946 to 872. [2021-07-13 19:32:40,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 872 states, 871 states have (on average 2.8495981630309988) internal successors, (2482), 871 states have internal predecessors, (2482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:32:40,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 872 states to 872 states and 2482 transitions. [2021-07-13 19:32:40,720 INFO L78 Accepts]: Start accepts. Automaton has 872 states and 2482 transitions. Word has length 17 [2021-07-13 19:32:40,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:32:40,720 INFO L482 AbstractCegarLoop]: Abstraction has 872 states and 2482 transitions. [2021-07-13 19:32:40,720 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:32:40,720 INFO L276 IsEmpty]: Start isEmpty. Operand 872 states and 2482 transitions. [2021-07-13 19:32:40,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:32:40,721 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:32:40,721 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:32:40,921 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1920,289 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:32:40,922 INFO L430 AbstractCegarLoop]: === Iteration 299 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:32:40,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:32:40,922 INFO L82 PathProgramCache]: Analyzing trace with hash -1538033224, now seen corresponding path program 285 times [2021-07-13 19:32:40,922 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:32:40,922 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245055696] [2021-07-13 19:32:40,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:32:40,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:32:40,995 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:32:40,995 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:32:40,995 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245055696] [2021-07-13 19:32:40,996 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1245055696] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:32:40,996 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [19561029] [2021-07-13 19:32:40,996 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 290 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 290 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:32:41,022 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 19:32:41,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:32:41,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 19:32:41,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:32:41,123 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:32:41,123 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:32:41,124 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:32:41,124 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:32:41,126 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:32:41,127 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:32:41,127 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:32:41,128 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:32:41,130 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:32:41,130 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:32:41,131 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:32:41,131 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:32:41,133 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:32:41,133 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:32:41,134 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:32:41,166 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-07-13 19:32:41,166 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:32:41,167 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:32:41,167 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-07-13 19:32:41,214 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:32:41,214 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [19561029] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:32:41,214 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:32:41,214 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-07-13 19:32:41,214 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250981798] [2021-07-13 19:32:41,214 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:32:41,215 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:32:41,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:32:41,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:32:41,215 INFO L87 Difference]: Start difference. First operand 872 states and 2482 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:32:41,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:32:41,621 INFO L93 Difference]: Finished difference Result 945 states and 2628 transitions. [2021-07-13 19:32:41,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 19:32:41,621 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:32:41,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:32:41,622 INFO L225 Difference]: With dead ends: 945 [2021-07-13 19:32:41,622 INFO L226 Difference]: Without dead ends: 945 [2021-07-13 19:32:41,623 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 368.8ms TimeCoverageRelationStatistics Valid=98, Invalid=552, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:32:41,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 945 states. [2021-07-13 19:32:41,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 945 to 862. [2021-07-13 19:32:41,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 862 states, 861 states have (on average 2.849012775842044) internal successors, (2453), 861 states have internal predecessors, (2453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:32:41,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 862 states to 862 states and 2453 transitions. [2021-07-13 19:32:41,632 INFO L78 Accepts]: Start accepts. Automaton has 862 states and 2453 transitions. Word has length 17 [2021-07-13 19:32:41,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:32:41,632 INFO L482 AbstractCegarLoop]: Abstraction has 862 states and 2453 transitions. [2021-07-13 19:32:41,632 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:32:41,632 INFO L276 IsEmpty]: Start isEmpty. Operand 862 states and 2453 transitions. [2021-07-13 19:32:41,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:32:41,633 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:32:41,633 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:32:41,833 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 290 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1926 [2021-07-13 19:32:41,834 INFO L430 AbstractCegarLoop]: === Iteration 300 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:32:41,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:32:41,834 INFO L82 PathProgramCache]: Analyzing trace with hash 208237532, now seen corresponding path program 286 times [2021-07-13 19:32:41,834 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:32:41,834 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006719082] [2021-07-13 19:32:41,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:32:41,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:32:41,898 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:32:41,898 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:32:41,899 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006719082] [2021-07-13 19:32:41,899 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2006719082] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:32:41,899 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [550318560] [2021-07-13 19:32:41,899 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 291 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 291 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:32:41,924 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:32:41,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:32:41,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 19:32:41,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:32:42,043 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:32:42,044 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:32:42,044 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:32:42,045 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:32:42,047 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:32:42,047 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:32:42,048 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:32:42,069 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-07-13 19:32:42,069 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:32:42,069 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:32:42,069 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-07-13 19:32:42,088 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:32:42,088 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [550318560] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:32:42,088 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:32:42,088 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-07-13 19:32:42,088 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822858114] [2021-07-13 19:32:42,088 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:32:42,088 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:32:42,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:32:42,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:32:42,088 INFO L87 Difference]: Start difference. First operand 862 states and 2453 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:32:42,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:32:42,409 INFO L93 Difference]: Finished difference Result 974 states and 2681 transitions. [2021-07-13 19:32:42,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:32:42,409 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:32:42,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:32:42,411 INFO L225 Difference]: With dead ends: 974 [2021-07-13 19:32:42,411 INFO L226 Difference]: Without dead ends: 974 [2021-07-13 19:32:42,411 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 197.2ms TimeCoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:32:42,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 974 states. [2021-07-13 19:32:42,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 974 to 861. [2021-07-13 19:32:42,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 861 states, 860 states have (on average 2.85) internal successors, (2451), 860 states have internal predecessors, (2451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:32:42,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 861 states to 861 states and 2451 transitions. [2021-07-13 19:32:42,421 INFO L78 Accepts]: Start accepts. Automaton has 861 states and 2451 transitions. Word has length 17 [2021-07-13 19:32:42,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:32:42,421 INFO L482 AbstractCegarLoop]: Abstraction has 861 states and 2451 transitions. [2021-07-13 19:32:42,421 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:32:42,421 INFO L276 IsEmpty]: Start isEmpty. Operand 861 states and 2451 transitions. [2021-07-13 19:32:42,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:32:42,422 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:32:42,422 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:32:42,628 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1930,291 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:32:42,629 INFO L430 AbstractCegarLoop]: === Iteration 301 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:32:42,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:32:42,629 INFO L82 PathProgramCache]: Analyzing trace with hash -711463176, now seen corresponding path program 287 times [2021-07-13 19:32:42,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:32:42,629 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120668514] [2021-07-13 19:32:42,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:32:42,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:32:42,693 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:32:42,693 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:32:42,693 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120668514] [2021-07-13 19:32:42,693 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1120668514] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:32:42,693 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2045213434] [2021-07-13 19:32:42,693 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 292 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 292 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:32:42,719 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:32:42,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:32:42,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 19:32:42,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:32:42,859 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:32:42,860 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:32:42,860 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:32:42,861 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:32:42,863 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:32:42,864 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:32:42,866 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:32:42,867 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:32:42,869 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:32:42,869 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:32:42,872 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:32:42,872 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:32:42,874 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:32:42,875 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:32:42,876 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:32:42,904 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-07-13 19:32:42,905 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:32:42,905 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:32:42,905 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-07-13 19:32:42,931 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:32:42,931 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2045213434] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:32:42,931 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:32:42,931 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-07-13 19:32:42,931 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160090174] [2021-07-13 19:32:42,932 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:32:42,932 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:32:42,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:32:42,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:32:42,932 INFO L87 Difference]: Start difference. First operand 861 states and 2451 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:32:43,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:32:43,415 INFO L93 Difference]: Finished difference Result 916 states and 2555 transitions. [2021-07-13 19:32:43,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-13 19:32:43,415 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:32:43,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:32:43,417 INFO L225 Difference]: With dead ends: 916 [2021-07-13 19:32:43,417 INFO L226 Difference]: Without dead ends: 912 [2021-07-13 19:32:43,417 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 433.3ms TimeCoverageRelationStatistics Valid=114, Invalid=756, Unknown=0, NotChecked=0, Total=870 [2021-07-13 19:32:43,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 912 states. [2021-07-13 19:32:43,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 912 to 861. [2021-07-13 19:32:43,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 861 states, 860 states have (on average 2.8453488372093023) internal successors, (2447), 860 states have internal predecessors, (2447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:32:43,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 861 states to 861 states and 2447 transitions. [2021-07-13 19:32:43,426 INFO L78 Accepts]: Start accepts. Automaton has 861 states and 2447 transitions. Word has length 17 [2021-07-13 19:32:43,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:32:43,426 INFO L482 AbstractCegarLoop]: Abstraction has 861 states and 2447 transitions. [2021-07-13 19:32:43,426 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:32:43,427 INFO L276 IsEmpty]: Start isEmpty. Operand 861 states and 2447 transitions. [2021-07-13 19:32:43,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:32:43,427 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:32:43,428 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:32:43,628 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 292 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1933 [2021-07-13 19:32:43,628 INFO L430 AbstractCegarLoop]: === Iteration 302 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:32:43,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:32:43,628 INFO L82 PathProgramCache]: Analyzing trace with hash 215967930, now seen corresponding path program 288 times [2021-07-13 19:32:43,628 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:32:43,628 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940038642] [2021-07-13 19:32:43,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:32:43,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:32:43,699 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:32:43,699 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:32:43,699 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940038642] [2021-07-13 19:32:43,699 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1940038642] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:32:43,699 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1935245946] [2021-07-13 19:32:43,699 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 293 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 293 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:32:43,725 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:32:43,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:32:43,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 19:32:43,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:32:43,810 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:32:43,811 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:32:43,811 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:32:43,812 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:32:43,814 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:32:43,814 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:32:43,815 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:32:43,815 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:32:43,817 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:32:43,818 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:32:43,818 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:32:43,819 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:32:43,821 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:32:43,821 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:32:43,822 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:32:43,853 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-07-13 19:32:43,853 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:32:43,854 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:32:43,854 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-07-13 19:32:43,901 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:32:43,901 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1935245946] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:32:43,901 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:32:43,901 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-07-13 19:32:43,902 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508805436] [2021-07-13 19:32:43,902 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:32:43,902 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:32:43,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:32:43,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:32:43,902 INFO L87 Difference]: Start difference. First operand 861 states and 2447 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:32:44,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:32:44,306 INFO L93 Difference]: Finished difference Result 970 states and 2638 transitions. [2021-07-13 19:32:44,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 19:32:44,307 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:32:44,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:32:44,308 INFO L225 Difference]: With dead ends: 970 [2021-07-13 19:32:44,308 INFO L226 Difference]: Without dead ends: 968 [2021-07-13 19:32:44,308 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 373.0ms TimeCoverageRelationStatistics Valid=117, Invalid=639, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:32:44,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 968 states. [2021-07-13 19:32:44,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 968 to 857. [2021-07-13 19:32:44,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 857 states, 856 states have (on average 2.8376168224299065) internal successors, (2429), 856 states have internal predecessors, (2429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:32:44,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 857 states to 857 states and 2429 transitions. [2021-07-13 19:32:44,317 INFO L78 Accepts]: Start accepts. Automaton has 857 states and 2429 transitions. Word has length 17 [2021-07-13 19:32:44,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:32:44,318 INFO L482 AbstractCegarLoop]: Abstraction has 857 states and 2429 transitions. [2021-07-13 19:32:44,318 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:32:44,318 INFO L276 IsEmpty]: Start isEmpty. Operand 857 states and 2429 transitions. [2021-07-13 19:32:44,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:32:44,319 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:32:44,319 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:32:44,519 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1940,293 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:32:44,519 INFO L430 AbstractCegarLoop]: === Iteration 303 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:32:44,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:32:44,519 INFO L82 PathProgramCache]: Analyzing trace with hash 1017584158, now seen corresponding path program 289 times [2021-07-13 19:32:44,520 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:32:44,520 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368953708] [2021-07-13 19:32:44,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:32:44,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:32:44,593 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:32:44,594 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:32:44,594 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368953708] [2021-07-13 19:32:44,594 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1368953708] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:32:44,594 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1420639751] [2021-07-13 19:32:44,594 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 294 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 294 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:32:44,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:32:44,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 19:32:44,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:32:44,713 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:32:44,714 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:32:44,714 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:32:44,715 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:32:44,717 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:32:44,717 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:32:44,718 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:32:44,719 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:32:44,721 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:32:44,721 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:32:44,721 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:32:44,722 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:32:44,724 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:32:44,724 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:32:44,725 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:32:44,757 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-07-13 19:32:44,757 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:32:44,758 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:32:44,758 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-07-13 19:32:44,818 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:32:44,818 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1420639751] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:32:44,819 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:32:44,819 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-07-13 19:32:44,819 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449825288] [2021-07-13 19:32:44,819 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:32:44,819 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:32:44,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:32:44,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:32:44,819 INFO L87 Difference]: Start difference. First operand 857 states and 2429 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:32:45,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:32:45,455 INFO L93 Difference]: Finished difference Result 947 states and 2595 transitions. [2021-07-13 19:32:45,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-13 19:32:45,455 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:32:45,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:32:45,457 INFO L225 Difference]: With dead ends: 947 [2021-07-13 19:32:45,457 INFO L226 Difference]: Without dead ends: 943 [2021-07-13 19:32:45,457 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 343 ImplicationChecksByTransitivity, 609.0ms TimeCoverageRelationStatistics Valid=179, Invalid=1227, Unknown=0, NotChecked=0, Total=1406 [2021-07-13 19:32:45,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 943 states. [2021-07-13 19:32:45,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 943 to 864. [2021-07-13 19:32:45,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 864 states, 863 states have (on average 2.8296639629200464) internal successors, (2442), 863 states have internal predecessors, (2442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:32:45,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 864 states to 864 states and 2442 transitions. [2021-07-13 19:32:45,467 INFO L78 Accepts]: Start accepts. Automaton has 864 states and 2442 transitions. Word has length 17 [2021-07-13 19:32:45,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:32:45,467 INFO L482 AbstractCegarLoop]: Abstraction has 864 states and 2442 transitions. [2021-07-13 19:32:45,467 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:32:45,467 INFO L276 IsEmpty]: Start isEmpty. Operand 864 states and 2442 transitions. [2021-07-13 19:32:45,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:32:45,468 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:32:45,468 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:32:45,668 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 294 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1944 [2021-07-13 19:32:45,668 INFO L430 AbstractCegarLoop]: === Iteration 304 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:32:45,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:32:45,669 INFO L82 PathProgramCache]: Analyzing trace with hash -1559039432, now seen corresponding path program 290 times [2021-07-13 19:32:45,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:32:45,669 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111043381] [2021-07-13 19:32:45,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:32:45,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:32:45,738 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:32:45,738 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:32:45,738 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111043381] [2021-07-13 19:32:45,738 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1111043381] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:32:45,738 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [36345474] [2021-07-13 19:32:45,738 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 295 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 295 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:32:45,765 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:32:45,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:32:45,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 19:32:45,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:32:45,850 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:32:45,851 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:32:45,851 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:32:45,852 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:32:45,854 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:32:45,854 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:32:45,855 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:32:45,855 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:32:45,858 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:32:45,858 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:32:45,858 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:32:45,859 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:32:45,861 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:32:45,861 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:32:45,862 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:32:45,893 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-07-13 19:32:45,893 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:32:45,894 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:32:45,894 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-07-13 19:32:45,941 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:32:45,942 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [36345474] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:32:45,942 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:32:45,942 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-07-13 19:32:45,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378676840] [2021-07-13 19:32:45,942 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:32:45,942 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:32:45,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:32:45,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:32:45,942 INFO L87 Difference]: Start difference. First operand 864 states and 2442 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:32:46,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:32:46,383 INFO L93 Difference]: Finished difference Result 939 states and 2592 transitions. [2021-07-13 19:32:46,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 19:32:46,383 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:32:46,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:32:46,384 INFO L225 Difference]: With dead ends: 939 [2021-07-13 19:32:46,384 INFO L226 Difference]: Without dead ends: 939 [2021-07-13 19:32:46,384 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 400.8ms TimeCoverageRelationStatistics Valid=122, Invalid=690, Unknown=0, NotChecked=0, Total=812 [2021-07-13 19:32:46,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 939 states. [2021-07-13 19:32:46,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 939 to 854. [2021-07-13 19:32:46,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 854 states, 853 states have (on average 2.8253223915592027) internal successors, (2410), 853 states have internal predecessors, (2410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:32:46,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 854 states to 854 states and 2410 transitions. [2021-07-13 19:32:46,394 INFO L78 Accepts]: Start accepts. Automaton has 854 states and 2410 transitions. Word has length 17 [2021-07-13 19:32:46,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:32:46,394 INFO L482 AbstractCegarLoop]: Abstraction has 854 states and 2410 transitions. [2021-07-13 19:32:46,394 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:32:46,394 INFO L276 IsEmpty]: Start isEmpty. Operand 854 states and 2410 transitions. [2021-07-13 19:32:46,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:32:46,395 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:32:46,395 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:32:46,595 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1950,295 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:32:46,595 INFO L430 AbstractCegarLoop]: === Iteration 305 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:32:46,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:32:46,596 INFO L82 PathProgramCache]: Analyzing trace with hash -200351686, now seen corresponding path program 291 times [2021-07-13 19:32:46,596 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:32:46,596 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754834036] [2021-07-13 19:32:46,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:32:46,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:32:46,682 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:32:46,682 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:32:46,682 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754834036] [2021-07-13 19:32:46,682 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [754834036] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:32:46,683 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1266200826] [2021-07-13 19:32:46,683 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 296 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 296 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:32:46,709 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:32:46,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:32:46,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 19:32:46,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:32:46,808 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:32:46,809 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:32:46,809 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:32:46,810 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:32:46,812 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:32:46,812 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:32:46,812 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:32:46,813 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:32:46,815 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:32:46,816 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:32:46,816 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:32:46,816 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:32:46,818 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:32:46,819 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:32:46,819 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:32:46,851 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-07-13 19:32:46,851 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:32:46,851 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:32:46,852 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-07-13 19:32:46,899 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:32:46,899 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1266200826] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:32:46,899 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:32:46,899 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 19:32:46,899 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130910842] [2021-07-13 19:32:46,899 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:32:46,899 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:32:46,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:32:46,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:32:46,900 INFO L87 Difference]: Start difference. First operand 854 states and 2410 transitions. Second operand has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:32:47,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:32:47,339 INFO L93 Difference]: Finished difference Result 1033 states and 2758 transitions. [2021-07-13 19:32:47,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 19:32:47,339 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:32:47,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:32:47,341 INFO L225 Difference]: With dead ends: 1033 [2021-07-13 19:32:47,341 INFO L226 Difference]: Without dead ends: 1033 [2021-07-13 19:32:47,341 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 387.3ms TimeCoverageRelationStatistics Valid=121, Invalid=749, Unknown=0, NotChecked=0, Total=870 [2021-07-13 19:32:47,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1033 states. [2021-07-13 19:32:47,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1033 to 873. [2021-07-13 19:32:47,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 873 states, 872 states have (on average 2.842889908256881) internal successors, (2479), 872 states have internal predecessors, (2479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:32:47,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 873 states to 873 states and 2479 transitions. [2021-07-13 19:32:47,351 INFO L78 Accepts]: Start accepts. Automaton has 873 states and 2479 transitions. Word has length 17 [2021-07-13 19:32:47,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:32:47,351 INFO L482 AbstractCegarLoop]: Abstraction has 873 states and 2479 transitions. [2021-07-13 19:32:47,351 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:32:47,351 INFO L276 IsEmpty]: Start isEmpty. Operand 873 states and 2479 transitions. [2021-07-13 19:32:47,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:32:47,352 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:32:47,352 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:32:47,553 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1954,296 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:32:47,553 INFO L430 AbstractCegarLoop]: === Iteration 306 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:32:47,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:32:47,553 INFO L82 PathProgramCache]: Analyzing trace with hash 601264542, now seen corresponding path program 292 times [2021-07-13 19:32:47,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:32:47,553 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313068166] [2021-07-13 19:32:47,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:32:47,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:32:47,639 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:32:47,639 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:32:47,639 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313068166] [2021-07-13 19:32:47,640 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [313068166] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:32:47,640 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [696048718] [2021-07-13 19:32:47,640 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 297 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 297 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:32:47,665 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:32:47,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:32:47,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 19:32:47,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:32:47,764 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:32:47,764 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:32:47,764 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:32:47,765 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:32:47,767 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:32:47,768 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:32:47,768 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:32:47,769 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:32:47,771 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:32:47,771 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:32:47,771 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:32:47,772 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:32:47,774 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:32:47,774 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:32:47,775 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:32:47,807 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-07-13 19:32:47,807 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:32:47,807 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:32:47,808 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-07-13 19:32:47,876 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:32:47,877 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [696048718] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:32:47,877 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:32:47,877 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 19:32:47,877 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421980476] [2021-07-13 19:32:47,877 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:32:47,877 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:32:47,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:32:47,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:32:47,877 INFO L87 Difference]: Start difference. First operand 873 states and 2479 transitions. Second operand has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:32:48,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:32:48,682 INFO L93 Difference]: Finished difference Result 1044 states and 2785 transitions. [2021-07-13 19:32:48,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-07-13 19:32:48,682 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:32:48,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:32:48,683 INFO L225 Difference]: With dead ends: 1044 [2021-07-13 19:32:48,683 INFO L226 Difference]: Without dead ends: 1034 [2021-07-13 19:32:48,684 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 515 ImplicationChecksByTransitivity, 729.8ms TimeCoverageRelationStatistics Valid=217, Invalid=1675, Unknown=0, NotChecked=0, Total=1892 [2021-07-13 19:32:48,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1034 states. [2021-07-13 19:32:48,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1034 to 886. [2021-07-13 19:32:48,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 886 states, 885 states have (on average 2.8350282485875704) internal successors, (2509), 885 states have internal predecessors, (2509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:32:48,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 886 states to 886 states and 2509 transitions. [2021-07-13 19:32:48,694 INFO L78 Accepts]: Start accepts. Automaton has 886 states and 2509 transitions. Word has length 17 [2021-07-13 19:32:48,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:32:48,694 INFO L482 AbstractCegarLoop]: Abstraction has 886 states and 2509 transitions. [2021-07-13 19:32:48,694 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:32:48,694 INFO L276 IsEmpty]: Start isEmpty. Operand 886 states and 2509 transitions. [2021-07-13 19:32:48,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:32:48,695 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:32:48,695 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:32:48,896 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 297 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1958 [2021-07-13 19:32:48,896 INFO L430 AbstractCegarLoop]: === Iteration 307 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:32:48,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:32:48,896 INFO L82 PathProgramCache]: Analyzing trace with hash -1975359048, now seen corresponding path program 293 times [2021-07-13 19:32:48,896 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:32:48,896 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231756553] [2021-07-13 19:32:48,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:32:48,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:32:48,983 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:32:48,983 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:32:48,983 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231756553] [2021-07-13 19:32:48,983 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1231756553] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:32:48,983 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2108545308] [2021-07-13 19:32:48,983 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 298 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 298 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:32:49,010 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:32:49,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:32:49,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 19:32:49,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:32:49,107 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:32:49,108 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:32:49,108 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:32:49,109 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:32:49,111 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:32:49,111 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:32:49,111 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:32:49,112 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:32:49,114 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:32:49,115 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:32:49,115 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:32:49,116 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:32:49,118 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:32:49,118 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:32:49,118 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:32:49,151 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-07-13 19:32:49,151 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:32:49,151 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:32:49,151 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-07-13 19:32:49,201 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:32:49,201 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2108545308] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:32:49,201 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:32:49,201 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 19:32:49,201 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097431002] [2021-07-13 19:32:49,201 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:32:49,202 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:32:49,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:32:49,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:32:49,202 INFO L87 Difference]: Start difference. First operand 886 states and 2509 transitions. Second operand has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:32:49,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:32:49,770 INFO L93 Difference]: Finished difference Result 1034 states and 2759 transitions. [2021-07-13 19:32:49,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-13 19:32:49,770 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:32:49,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:32:49,771 INFO L225 Difference]: With dead ends: 1034 [2021-07-13 19:32:49,771 INFO L226 Difference]: Without dead ends: 1034 [2021-07-13 19:32:49,772 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 491.5ms TimeCoverageRelationStatistics Valid=148, Invalid=908, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 19:32:49,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1034 states. [2021-07-13 19:32:49,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1034 to 866. [2021-07-13 19:32:49,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 866 states, 865 states have (on average 2.817341040462428) internal successors, (2437), 865 states have internal predecessors, (2437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:32:49,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 866 states to 866 states and 2437 transitions. [2021-07-13 19:32:49,781 INFO L78 Accepts]: Start accepts. Automaton has 866 states and 2437 transitions. Word has length 17 [2021-07-13 19:32:49,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:32:49,782 INFO L482 AbstractCegarLoop]: Abstraction has 866 states and 2437 transitions. [2021-07-13 19:32:49,782 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:32:49,782 INFO L276 IsEmpty]: Start isEmpty. Operand 866 states and 2437 transitions. [2021-07-13 19:32:49,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:32:49,783 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:32:49,783 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:32:49,983 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 298 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1964 [2021-07-13 19:32:49,983 INFO L430 AbstractCegarLoop]: === Iteration 308 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:32:49,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:32:49,983 INFO L82 PathProgramCache]: Analyzing trace with hash 608994940, now seen corresponding path program 294 times [2021-07-13 19:32:49,983 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:32:49,984 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380551425] [2021-07-13 19:32:49,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:32:49,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:32:50,068 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:32:50,068 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:32:50,068 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380551425] [2021-07-13 19:32:50,068 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1380551425] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:32:50,068 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1203464515] [2021-07-13 19:32:50,068 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 299 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 299 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:32:50,095 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:32:50,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:32:50,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 19:32:50,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:32:50,218 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:32:50,218 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:32:50,219 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:32:50,219 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:32:50,221 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:32:50,222 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:32:50,222 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:32:50,242 INFO L628 ElimStorePlain]: treesize reduction 30, result has 33.3 percent of original size [2021-07-13 19:32:50,242 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:32:50,243 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:32:50,243 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:59, output treesize:15 [2021-07-13 19:32:50,269 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:32:50,269 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1203464515] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:32:50,269 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:32:50,269 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 19:32:50,269 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770957667] [2021-07-13 19:32:50,269 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:32:50,269 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:32:50,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:32:50,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:32:50,270 INFO L87 Difference]: Start difference. First operand 866 states and 2437 transitions. Second operand has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:32:51,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:32:51,002 INFO L93 Difference]: Finished difference Result 1058 states and 2788 transitions. [2021-07-13 19:32:51,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-13 19:32:51,003 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:32:51,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:32:51,004 INFO L225 Difference]: With dead ends: 1058 [2021-07-13 19:32:51,004 INFO L226 Difference]: Without dead ends: 1058 [2021-07-13 19:32:51,004 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 357 ImplicationChecksByTransitivity, 593.9ms TimeCoverageRelationStatistics Valid=186, Invalid=1296, Unknown=0, NotChecked=0, Total=1482 [2021-07-13 19:32:51,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1058 states. [2021-07-13 19:32:51,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1058 to 864. [2021-07-13 19:32:51,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 864 states, 863 states have (on average 2.8157589803012746) internal successors, (2430), 863 states have internal predecessors, (2430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:32:51,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 864 states to 864 states and 2430 transitions. [2021-07-13 19:32:51,015 INFO L78 Accepts]: Start accepts. Automaton has 864 states and 2430 transitions. Word has length 17 [2021-07-13 19:32:51,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:32:51,015 INFO L482 AbstractCegarLoop]: Abstraction has 864 states and 2430 transitions. [2021-07-13 19:32:51,015 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:32:51,015 INFO L276 IsEmpty]: Start isEmpty. Operand 864 states and 2430 transitions. [2021-07-13 19:32:51,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:32:51,016 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:32:51,016 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:32:51,216 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1968,299 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:32:51,216 INFO L430 AbstractCegarLoop]: === Iteration 309 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:32:51,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:32:51,217 INFO L82 PathProgramCache]: Analyzing trace with hash -880410056, now seen corresponding path program 295 times [2021-07-13 19:32:51,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:32:51,217 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074135205] [2021-07-13 19:32:51,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:32:51,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:32:51,291 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:32:51,291 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:32:51,291 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074135205] [2021-07-13 19:32:51,291 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1074135205] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:32:51,291 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [34560325] [2021-07-13 19:32:51,291 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 300 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 300 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:32:51,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:32:51,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 19:32:51,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:32:51,432 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:32:51,433 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:32:51,433 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:32:51,434 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:32:51,436 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:32:51,436 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:32:51,446 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:32:51,464 INFO L628 ElimStorePlain]: treesize reduction 30, result has 33.3 percent of original size [2021-07-13 19:32:51,464 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:32:51,465 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:32:51,465 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:59, output treesize:15 [2021-07-13 19:32:51,489 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:32:51,489 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [34560325] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:32:51,489 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:32:51,489 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 19:32:51,489 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805040673] [2021-07-13 19:32:51,490 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:32:51,490 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:32:51,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:32:51,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:32:51,490 INFO L87 Difference]: Start difference. First operand 864 states and 2430 transitions. Second operand has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:32:51,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:32:51,754 INFO L93 Difference]: Finished difference Result 998 states and 2668 transitions. [2021-07-13 19:32:51,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 19:32:51,754 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:32:51,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:32:51,756 INFO L225 Difference]: With dead ends: 998 [2021-07-13 19:32:51,756 INFO L226 Difference]: Without dead ends: 998 [2021-07-13 19:32:51,756 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 224.5ms TimeCoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:32:51,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 998 states. [2021-07-13 19:32:51,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 998 to 833. [2021-07-13 19:32:51,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 833 states, 832 states have (on average 2.7992788461538463) internal successors, (2329), 832 states have internal predecessors, (2329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:32:51,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 833 states to 833 states and 2329 transitions. [2021-07-13 19:32:51,765 INFO L78 Accepts]: Start accepts. Automaton has 833 states and 2329 transitions. Word has length 17 [2021-07-13 19:32:51,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:32:51,766 INFO L482 AbstractCegarLoop]: Abstraction has 833 states and 2329 transitions. [2021-07-13 19:32:51,766 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:32:51,766 INFO L276 IsEmpty]: Start isEmpty. Operand 833 states and 2329 transitions. [2021-07-13 19:32:51,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:32:51,767 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:32:51,767 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:32:51,967 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 300 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1970 [2021-07-13 19:32:51,967 INFO L430 AbstractCegarLoop]: === Iteration 310 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:32:51,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:32:51,967 INFO L82 PathProgramCache]: Analyzing trace with hash -1644528860, now seen corresponding path program 296 times [2021-07-13 19:32:51,968 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:32:51,968 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170448863] [2021-07-13 19:32:51,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:32:51,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:32:52,049 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:32:52,049 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:32:52,049 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170448863] [2021-07-13 19:32:52,049 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1170448863] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:32:52,049 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [484547758] [2021-07-13 19:32:52,049 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 301 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 301 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:32:52,075 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:32:52,076 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:32:52,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 19:32:52,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:32:52,223 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:32:52,224 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:32:52,224 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:32:52,225 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:32:52,227 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:32:52,227 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:32:52,228 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:32:52,249 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-07-13 19:32:52,249 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:32:52,249 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:32:52,250 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-07-13 19:32:52,270 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:32:52,270 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [484547758] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:32:52,270 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:32:52,270 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-13 19:32:52,270 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269316528] [2021-07-13 19:32:52,270 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:32:52,270 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:32:52,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:32:52,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:32:52,271 INFO L87 Difference]: Start difference. First operand 833 states and 2329 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:32:52,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:32:52,508 INFO L93 Difference]: Finished difference Result 983 states and 2626 transitions. [2021-07-13 19:32:52,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:32:52,508 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:32:52,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:32:52,509 INFO L225 Difference]: With dead ends: 983 [2021-07-13 19:32:52,509 INFO L226 Difference]: Without dead ends: 983 [2021-07-13 19:32:52,509 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 193.0ms TimeCoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:32:52,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 983 states. [2021-07-13 19:32:52,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 983 to 873. [2021-07-13 19:32:52,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 873 states, 872 states have (on average 2.819954128440367) internal successors, (2459), 872 states have internal predecessors, (2459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:32:52,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 873 states to 873 states and 2459 transitions. [2021-07-13 19:32:52,519 INFO L78 Accepts]: Start accepts. Automaton has 873 states and 2459 transitions. Word has length 17 [2021-07-13 19:32:52,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:32:52,519 INFO L482 AbstractCegarLoop]: Abstraction has 873 states and 2459 transitions. [2021-07-13 19:32:52,519 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:32:52,519 INFO L276 IsEmpty]: Start isEmpty. Operand 873 states and 2459 transitions. [2021-07-13 19:32:52,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:32:52,520 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:32:52,520 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:32:52,721 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1972,301 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:32:52,721 INFO L430 AbstractCegarLoop]: === Iteration 311 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:32:52,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:32:52,721 INFO L82 PathProgramCache]: Analyzing trace with hash -713646272, now seen corresponding path program 297 times [2021-07-13 19:32:52,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:32:52,721 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309905602] [2021-07-13 19:32:52,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:32:52,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:32:52,798 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:32:52,799 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:32:52,799 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309905602] [2021-07-13 19:32:52,799 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1309905602] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:32:52,799 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [275227517] [2021-07-13 19:32:52,799 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 302 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 302 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:32:52,825 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:32:52,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:32:52,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 19:32:52,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:32:52,999 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:32:52,999 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:32:53,000 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:32:53,000 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:32:53,002 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:32:53,003 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:32:53,005 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:32:53,007 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:32:53,009 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:32:53,010 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:32:53,012 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:32:53,013 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:32:53,015 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:32:53,015 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:32:53,016 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:32:53,045 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-07-13 19:32:53,045 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:32:53,046 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:32:53,046 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-07-13 19:32:53,074 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:32:53,074 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [275227517] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:32:53,074 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:32:53,074 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-13 19:32:53,074 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34217225] [2021-07-13 19:32:53,074 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:32:53,074 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:32:53,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:32:53,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:32:53,075 INFO L87 Difference]: Start difference. First operand 873 states and 2459 transitions. Second operand has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:32:53,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:32:53,597 INFO L93 Difference]: Finished difference Result 964 states and 2578 transitions. [2021-07-13 19:32:53,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-13 19:32:53,597 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:32:53,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:32:53,598 INFO L225 Difference]: With dead ends: 964 [2021-07-13 19:32:53,598 INFO L226 Difference]: Without dead ends: 956 [2021-07-13 19:32:53,599 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 450.2ms TimeCoverageRelationStatistics Valid=106, Invalid=886, Unknown=0, NotChecked=0, Total=992 [2021-07-13 19:32:53,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 956 states. [2021-07-13 19:32:53,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 956 to 879. [2021-07-13 19:32:53,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 879 states, 878 states have (on average 2.8086560364464694) internal successors, (2466), 878 states have internal predecessors, (2466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:32:53,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 879 states to 879 states and 2466 transitions. [2021-07-13 19:32:53,608 INFO L78 Accepts]: Start accepts. Automaton has 879 states and 2466 transitions. Word has length 17 [2021-07-13 19:32:53,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:32:53,609 INFO L482 AbstractCegarLoop]: Abstraction has 879 states and 2466 transitions. [2021-07-13 19:32:53,609 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:32:53,609 INFO L276 IsEmpty]: Start isEmpty. Operand 879 states and 2466 transitions. [2021-07-13 19:32:53,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:32:53,610 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:32:53,610 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:32:53,811 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 302 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1975 [2021-07-13 19:32:53,811 INFO L430 AbstractCegarLoop]: === Iteration 312 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:32:53,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:32:53,811 INFO L82 PathProgramCache]: Analyzing trace with hash 1489416322, now seen corresponding path program 298 times [2021-07-13 19:32:53,811 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:32:53,811 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969006225] [2021-07-13 19:32:53,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:32:53,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:32:53,887 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:32:53,888 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:32:53,888 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969006225] [2021-07-13 19:32:53,888 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1969006225] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:32:53,888 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1070484052] [2021-07-13 19:32:53,888 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 303 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 303 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:32:53,914 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:32:53,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:32:53,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 19:32:53,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:32:54,065 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:32:54,065 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:32:54,065 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:32:54,066 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:32:54,068 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:32:54,068 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:32:54,069 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:32:54,090 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-07-13 19:32:54,090 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:32:54,091 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:32:54,091 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-07-13 19:32:54,111 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:32:54,111 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1070484052] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:32:54,111 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:32:54,111 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-13 19:32:54,111 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389157499] [2021-07-13 19:32:54,111 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:32:54,111 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:32:54,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:32:54,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:32:54,112 INFO L87 Difference]: Start difference. First operand 879 states and 2466 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:32:55,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:32:55,017 INFO L93 Difference]: Finished difference Result 1061 states and 2767 transitions. [2021-07-13 19:32:55,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-07-13 19:32:55,017 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:32:55,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:32:55,019 INFO L225 Difference]: With dead ends: 1061 [2021-07-13 19:32:55,019 INFO L226 Difference]: Without dead ends: 1061 [2021-07-13 19:32:55,019 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 477 ImplicationChecksByTransitivity, 780.8ms TimeCoverageRelationStatistics Valid=246, Invalid=1734, Unknown=0, NotChecked=0, Total=1980 [2021-07-13 19:32:55,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1061 states. [2021-07-13 19:32:55,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1061 to 874. [2021-07-13 19:32:55,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 874 states, 873 states have (on average 2.8178694158075603) internal successors, (2460), 873 states have internal predecessors, (2460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:32:55,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 874 states to 874 states and 2460 transitions. [2021-07-13 19:32:55,029 INFO L78 Accepts]: Start accepts. Automaton has 874 states and 2460 transitions. Word has length 17 [2021-07-13 19:32:55,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:32:55,029 INFO L482 AbstractCegarLoop]: Abstraction has 874 states and 2460 transitions. [2021-07-13 19:32:55,029 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:32:55,029 INFO L276 IsEmpty]: Start isEmpty. Operand 874 states and 2460 transitions. [2021-07-13 19:32:55,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:32:55,030 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:32:55,030 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:32:55,231 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1982,303 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:32:55,231 INFO L430 AbstractCegarLoop]: === Iteration 313 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:32:55,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:32:55,231 INFO L82 PathProgramCache]: Analyzing trace with hash -1251501850, now seen corresponding path program 299 times [2021-07-13 19:32:55,231 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:32:55,231 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321781898] [2021-07-13 19:32:55,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:32:55,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:32:55,311 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:32:55,312 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:32:55,312 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321781898] [2021-07-13 19:32:55,312 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [321781898] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:32:55,312 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [793208209] [2021-07-13 19:32:55,312 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 304 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 304 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:32:55,339 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:32:55,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:32:55,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 19:32:55,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:32:55,511 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:32:55,512 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:32:55,512 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:32:55,513 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:32:55,515 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:32:55,516 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:32:55,518 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:32:55,519 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:32:55,521 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:32:55,521 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:32:55,524 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:32:55,524 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:32:55,526 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:32:55,527 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:32:55,528 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:32:55,556 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-07-13 19:32:55,556 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:32:55,557 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:32:55,557 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-07-13 19:32:55,585 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:32:55,585 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [793208209] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:32:55,585 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:32:55,585 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-13 19:32:55,585 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885876251] [2021-07-13 19:32:55,585 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:32:55,585 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:32:55,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:32:55,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:32:55,585 INFO L87 Difference]: Start difference. First operand 874 states and 2460 transitions. Second operand has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:32:56,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:32:56,170 INFO L93 Difference]: Finished difference Result 969 states and 2587 transitions. [2021-07-13 19:32:56,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-13 19:32:56,170 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:32:56,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:32:56,172 INFO L225 Difference]: With dead ends: 969 [2021-07-13 19:32:56,172 INFO L226 Difference]: Without dead ends: 963 [2021-07-13 19:32:56,172 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 562.8ms TimeCoverageRelationStatistics Valid=146, Invalid=1114, Unknown=0, NotChecked=0, Total=1260 [2021-07-13 19:32:56,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 963 states. [2021-07-13 19:32:56,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 963 to 876. [2021-07-13 19:32:56,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 876 states, 875 states have (on average 2.8125714285714287) internal successors, (2461), 875 states have internal predecessors, (2461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:32:56,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 876 states to 876 states and 2461 transitions. [2021-07-13 19:32:56,182 INFO L78 Accepts]: Start accepts. Automaton has 876 states and 2461 transitions. Word has length 17 [2021-07-13 19:32:56,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:32:56,182 INFO L482 AbstractCegarLoop]: Abstraction has 876 states and 2461 transitions. [2021-07-13 19:32:56,182 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:32:56,182 INFO L276 IsEmpty]: Start isEmpty. Operand 876 states and 2461 transitions. [2021-07-13 19:32:56,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:32:56,183 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:32:56,183 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:32:56,383 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 304 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1985 [2021-07-13 19:32:56,383 INFO L430 AbstractCegarLoop]: === Iteration 314 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:32:56,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:32:56,383 INFO L82 PathProgramCache]: Analyzing trace with hash 1729058660, now seen corresponding path program 300 times [2021-07-13 19:32:56,384 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:32:56,384 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237022927] [2021-07-13 19:32:56,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:32:56,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:32:56,470 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:32:56,470 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:32:56,470 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237022927] [2021-07-13 19:32:56,471 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1237022927] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:32:56,471 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2083397325] [2021-07-13 19:32:56,471 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 305 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 305 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:32:56,498 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:32:56,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:32:56,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 19:32:56,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:32:56,649 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:32:56,649 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:32:56,650 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:32:56,650 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:32:56,652 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:32:56,653 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:32:56,653 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:32:56,674 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-07-13 19:32:56,674 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:32:56,675 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:32:56,675 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-07-13 19:32:56,695 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:32:56,695 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2083397325] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:32:56,695 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:32:56,695 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-13 19:32:56,695 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064065750] [2021-07-13 19:32:56,695 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:32:56,695 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:32:56,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:32:56,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:32:56,696 INFO L87 Difference]: Start difference. First operand 876 states and 2461 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:32:57,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:32:57,464 INFO L93 Difference]: Finished difference Result 1058 states and 2767 transitions. [2021-07-13 19:32:57,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-13 19:32:57,465 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:32:57,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:32:57,466 INFO L225 Difference]: With dead ends: 1058 [2021-07-13 19:32:57,466 INFO L226 Difference]: Without dead ends: 1056 [2021-07-13 19:32:57,466 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 340 ImplicationChecksByTransitivity, 669.8ms TimeCoverageRelationStatistics Valid=185, Invalid=1375, Unknown=0, NotChecked=0, Total=1560 [2021-07-13 19:32:57,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1056 states. [2021-07-13 19:32:57,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1056 to 875. [2021-07-13 19:32:57,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 875 states, 874 states have (on average 2.8215102974828374) internal successors, (2466), 874 states have internal predecessors, (2466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:32:57,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 875 states to 875 states and 2466 transitions. [2021-07-13 19:32:57,476 INFO L78 Accepts]: Start accepts. Automaton has 875 states and 2466 transitions. Word has length 17 [2021-07-13 19:32:57,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:32:57,476 INFO L482 AbstractCegarLoop]: Abstraction has 875 states and 2466 transitions. [2021-07-13 19:32:57,476 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:32:57,476 INFO L276 IsEmpty]: Start isEmpty. Operand 875 states and 2466 transitions. [2021-07-13 19:32:57,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:32:57,477 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:32:57,477 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:32:57,677 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 305 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1992 [2021-07-13 19:32:57,678 INFO L430 AbstractCegarLoop]: === Iteration 315 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:32:57,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:32:57,678 INFO L82 PathProgramCache]: Analyzing trace with hash 809357952, now seen corresponding path program 301 times [2021-07-13 19:32:57,678 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:32:57,678 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615382147] [2021-07-13 19:32:57,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:32:57,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:32:57,772 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:32:57,772 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:32:57,772 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615382147] [2021-07-13 19:32:57,772 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [615382147] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:32:57,772 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2041372058] [2021-07-13 19:32:57,772 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 306 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 306 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:32:57,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:32:57,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 19:32:57,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:32:57,975 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:32:57,976 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:32:57,976 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:32:57,976 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:32:57,979 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:32:57,979 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:32:57,982 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:32:57,982 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:32:57,985 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:32:57,985 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:32:57,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:32:57,988 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:32:57,990 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:32:57,990 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:32:57,991 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:32:58,020 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-07-13 19:32:58,020 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:32:58,021 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:32:58,021 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-07-13 19:32:58,048 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:32:58,049 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2041372058] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:32:58,049 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:32:58,049 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-13 19:32:58,049 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900645601] [2021-07-13 19:32:58,049 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:32:58,049 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:32:58,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:32:58,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:32:58,049 INFO L87 Difference]: Start difference. First operand 875 states and 2466 transitions. Second operand has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:32:58,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:32:58,614 INFO L93 Difference]: Finished difference Result 944 states and 2560 transitions. [2021-07-13 19:32:58,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 19:32:58,614 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:32:58,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:32:58,616 INFO L225 Difference]: With dead ends: 944 [2021-07-13 19:32:58,616 INFO L226 Difference]: Without dead ends: 940 [2021-07-13 19:32:58,616 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 565.3ms TimeCoverageRelationStatistics Valid=129, Invalid=927, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 19:32:58,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 940 states. [2021-07-13 19:32:58,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 940 to 876. [2021-07-13 19:32:58,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 876 states, 875 states have (on average 2.816) internal successors, (2464), 875 states have internal predecessors, (2464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:32:58,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 876 states to 876 states and 2464 transitions. [2021-07-13 19:32:58,625 INFO L78 Accepts]: Start accepts. Automaton has 876 states and 2464 transitions. Word has length 17 [2021-07-13 19:32:58,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:32:58,625 INFO L482 AbstractCegarLoop]: Abstraction has 876 states and 2464 transitions. [2021-07-13 19:32:58,625 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:32:58,626 INFO L276 IsEmpty]: Start isEmpty. Operand 876 states and 2464 transitions. [2021-07-13 19:32:58,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:32:58,626 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:32:58,627 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:32:58,827 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 306 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1995 [2021-07-13 19:32:58,827 INFO L430 AbstractCegarLoop]: === Iteration 316 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:32:58,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:32:58,827 INFO L82 PathProgramCache]: Analyzing trace with hash 1736789058, now seen corresponding path program 302 times [2021-07-13 19:32:58,827 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:32:58,828 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024185164] [2021-07-13 19:32:58,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:32:58,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:32:58,914 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:32:58,915 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:32:58,915 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024185164] [2021-07-13 19:32:58,915 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2024185164] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:32:58,915 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1858723194] [2021-07-13 19:32:58,915 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 307 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 307 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:32:58,941 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:32:58,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:32:58,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 19:32:58,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:32:59,063 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:32:59,064 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:32:59,064 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:32:59,065 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:32:59,067 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:32:59,067 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:32:59,067 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:32:59,068 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:32:59,070 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:32:59,071 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:32:59,071 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:32:59,071 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:32:59,073 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:32:59,074 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:32:59,074 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:32:59,106 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-07-13 19:32:59,106 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:32:59,107 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:32:59,107 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-07-13 19:32:59,156 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:32:59,156 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1858723194] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:32:59,156 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:32:59,156 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-13 19:32:59,157 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133101418] [2021-07-13 19:32:59,157 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:32:59,157 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:32:59,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:32:59,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:32:59,157 INFO L87 Difference]: Start difference. First operand 876 states and 2464 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:32:59,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:32:59,781 INFO L93 Difference]: Finished difference Result 1040 states and 2679 transitions. [2021-07-13 19:32:59,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-13 19:32:59,781 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:32:59,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:32:59,783 INFO L225 Difference]: With dead ends: 1040 [2021-07-13 19:32:59,783 INFO L226 Difference]: Without dead ends: 1038 [2021-07-13 19:32:59,783 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 580.9ms TimeCoverageRelationStatistics Valid=160, Invalid=962, Unknown=0, NotChecked=0, Total=1122 [2021-07-13 19:32:59,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1038 states. [2021-07-13 19:32:59,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1038 to 835. [2021-07-13 19:32:59,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 835 states, 834 states have (on average 2.7841726618705036) internal successors, (2322), 834 states have internal predecessors, (2322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:32:59,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 835 states to 835 states and 2322 transitions. [2021-07-13 19:32:59,793 INFO L78 Accepts]: Start accepts. Automaton has 835 states and 2322 transitions. Word has length 17 [2021-07-13 19:32:59,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:32:59,793 INFO L482 AbstractCegarLoop]: Abstraction has 835 states and 2322 transitions. [2021-07-13 19:32:59,793 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:32:59,793 INFO L276 IsEmpty]: Start isEmpty. Operand 835 states and 2322 transitions. [2021-07-13 19:32:59,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:32:59,794 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:32:59,794 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:32:59,994 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 307 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2002 [2021-07-13 19:32:59,995 INFO L430 AbstractCegarLoop]: === Iteration 317 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:32:59,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:32:59,995 INFO L82 PathProgramCache]: Analyzing trace with hash -1756562010, now seen corresponding path program 303 times [2021-07-13 19:32:59,995 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:32:59,995 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874844644] [2021-07-13 19:32:59,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:32:59,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:33:00,085 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:33:00,085 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:33:00,085 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874844644] [2021-07-13 19:33:00,085 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [874844644] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:33:00,085 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1254139227] [2021-07-13 19:33:00,086 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 308 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 308 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:33:00,112 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:33:00,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:33:00,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 19:33:00,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:33:00,238 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:33:00,238 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:33:00,238 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:33:00,239 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:33:00,241 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:33:00,242 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:33:00,242 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:33:00,243 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:33:00,245 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:33:00,245 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:33:00,245 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:33:00,246 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:33:00,248 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:33:00,248 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:33:00,249 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:33:00,287 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-07-13 19:33:00,287 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:33:00,287 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:33:00,288 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-07-13 19:33:00,351 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:33:00,351 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1254139227] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:33:00,351 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:33:00,351 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-13 19:33:00,351 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605058169] [2021-07-13 19:33:00,352 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:33:00,352 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:33:00,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:33:00,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:33:00,352 INFO L87 Difference]: Start difference. First operand 835 states and 2322 transitions. Second operand has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:33:00,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:33:00,948 INFO L93 Difference]: Finished difference Result 924 states and 2467 transitions. [2021-07-13 19:33:00,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-13 19:33:00,949 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:33:00,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:33:00,950 INFO L225 Difference]: With dead ends: 924 [2021-07-13 19:33:00,950 INFO L226 Difference]: Without dead ends: 920 [2021-07-13 19:33:00,950 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 578.7ms TimeCoverageRelationStatistics Valid=137, Invalid=919, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 19:33:00,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 920 states. [2021-07-13 19:33:00,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 920 to 840. [2021-07-13 19:33:00,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 840 states, 839 states have (on average 2.7842669845053636) internal successors, (2336), 839 states have internal predecessors, (2336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:33:00,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 840 states to 840 states and 2336 transitions. [2021-07-13 19:33:00,960 INFO L78 Accepts]: Start accepts. Automaton has 840 states and 2336 transitions. Word has length 17 [2021-07-13 19:33:00,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:33:00,960 INFO L482 AbstractCegarLoop]: Abstraction has 840 states and 2336 transitions. [2021-07-13 19:33:00,960 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:33:00,960 INFO L276 IsEmpty]: Start isEmpty. Operand 840 states and 2336 transitions. [2021-07-13 19:33:00,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:33:00,961 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:33:00,961 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:33:01,161 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2006,308 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:33:01,161 INFO L430 AbstractCegarLoop]: === Iteration 318 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:33:01,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:33:01,162 INFO L82 PathProgramCache]: Analyzing trace with hash -38218304, now seen corresponding path program 304 times [2021-07-13 19:33:01,162 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:33:01,162 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621260832] [2021-07-13 19:33:01,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:33:01,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:33:01,255 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:33:01,255 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:33:01,255 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621260832] [2021-07-13 19:33:01,255 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1621260832] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:33:01,255 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [194179125] [2021-07-13 19:33:01,255 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 309 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 309 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:33:01,281 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:33:01,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:33:01,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 19:33:01,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:33:01,405 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:33:01,405 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:33:01,405 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:33:01,406 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:33:01,408 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:33:01,408 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:33:01,409 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:33:01,410 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:33:01,412 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:33:01,412 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:33:01,412 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:33:01,413 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:33:01,415 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:33:01,415 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:33:01,416 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:33:01,448 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-07-13 19:33:01,449 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:33:01,449 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:33:01,449 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-07-13 19:33:01,501 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:33:01,501 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [194179125] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:33:01,501 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:33:01,501 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-13 19:33:01,501 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752813806] [2021-07-13 19:33:01,501 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:33:01,501 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:33:01,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:33:01,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:33:01,502 INFO L87 Difference]: Start difference. First operand 840 states and 2336 transitions. Second operand has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:33:01,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:33:01,860 INFO L93 Difference]: Finished difference Result 915 states and 2451 transitions. [2021-07-13 19:33:01,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:33:01,861 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:33:01,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:33:01,862 INFO L225 Difference]: With dead ends: 915 [2021-07-13 19:33:01,862 INFO L226 Difference]: Without dead ends: 915 [2021-07-13 19:33:01,862 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 384.7ms TimeCoverageRelationStatistics Valid=90, Invalid=560, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:33:01,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 915 states. [2021-07-13 19:33:01,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 915 to 819. [2021-07-13 19:33:01,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 819 states, 818 states have (on average 2.7811735941320292) internal successors, (2275), 818 states have internal predecessors, (2275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:33:01,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 819 states to 819 states and 2275 transitions. [2021-07-13 19:33:01,871 INFO L78 Accepts]: Start accepts. Automaton has 819 states and 2275 transitions. Word has length 17 [2021-07-13 19:33:01,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:33:01,871 INFO L482 AbstractCegarLoop]: Abstraction has 819 states and 2275 transitions. [2021-07-13 19:33:01,871 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:33:01,871 INFO L276 IsEmpty]: Start isEmpty. Operand 819 states and 2275 transitions. [2021-07-13 19:33:01,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:33:01,872 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:33:01,872 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:33:02,072 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 309 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2012 [2021-07-13 19:33:02,073 INFO L430 AbstractCegarLoop]: === Iteration 319 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:33:02,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:33:02,073 INFO L82 PathProgramCache]: Analyzing trace with hash -2044748640, now seen corresponding path program 305 times [2021-07-13 19:33:02,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:33:02,073 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125816091] [2021-07-13 19:33:02,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:33:02,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:33:02,149 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:33:02,149 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:33:02,150 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125816091] [2021-07-13 19:33:02,150 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1125816091] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:33:02,150 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [381253075] [2021-07-13 19:33:02,150 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 310 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 310 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:33:02,177 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-13 19:33:02,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:33:02,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 19:33:02,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:33:02,288 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:33:02,289 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:33:02,289 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:33:02,290 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:33:02,292 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:33:02,292 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:33:02,292 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:33:02,293 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:33:02,295 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:33:02,296 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:33:02,296 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:33:02,296 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:33:02,298 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:33:02,299 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:33:02,299 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:33:02,331 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-07-13 19:33:02,331 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:33:02,332 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:33:02,332 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-07-13 19:33:02,398 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:33:02,398 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [381253075] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:33:02,398 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:33:02,398 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-07-13 19:33:02,399 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168339490] [2021-07-13 19:33:02,399 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:33:02,399 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:33:02,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:33:02,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:33:02,399 INFO L87 Difference]: Start difference. First operand 819 states and 2275 transitions. Second operand has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:33:02,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:33:02,964 INFO L93 Difference]: Finished difference Result 851 states and 2323 transitions. [2021-07-13 19:33:02,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 19:33:02,964 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:33:02,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:33:02,965 INFO L225 Difference]: With dead ends: 851 [2021-07-13 19:33:02,965 INFO L226 Difference]: Without dead ends: 847 [2021-07-13 19:33:02,965 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 593.0ms TimeCoverageRelationStatistics Valid=154, Invalid=968, Unknown=0, NotChecked=0, Total=1122 [2021-07-13 19:33:02,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 847 states. [2021-07-13 19:33:02,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 847 to 812. [2021-07-13 19:33:02,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 812 states, 811 states have (on average 2.780517879161529) internal successors, (2255), 811 states have internal predecessors, (2255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:33:02,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 812 states to 812 states and 2255 transitions. [2021-07-13 19:33:02,974 INFO L78 Accepts]: Start accepts. Automaton has 812 states and 2255 transitions. Word has length 17 [2021-07-13 19:33:02,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:33:02,975 INFO L482 AbstractCegarLoop]: Abstraction has 812 states and 2255 transitions. [2021-07-13 19:33:02,975 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:33:02,975 INFO L276 IsEmpty]: Start isEmpty. Operand 812 states and 2255 transitions. [2021-07-13 19:33:02,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:33:02,975 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:33:02,976 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:33:03,176 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 310 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2016 [2021-07-13 19:33:03,176 INFO L430 AbstractCegarLoop]: === Iteration 320 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:33:03,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:33:03,176 INFO L82 PathProgramCache]: Analyzing trace with hash 1683195326, now seen corresponding path program 306 times [2021-07-13 19:33:03,176 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:33:03,176 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306486401] [2021-07-13 19:33:03,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:33:03,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:33:03,244 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:33:03,245 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:33:03,245 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306486401] [2021-07-13 19:33:03,245 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1306486401] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:33:03,245 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1390498924] [2021-07-13 19:33:03,245 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 311 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 311 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:33:03,273 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:33:03,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:33:03,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 19:33:03,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:33:03,414 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:33:03,415 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:33:03,415 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:33:03,415 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:33:03,418 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:33:03,418 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:33:03,419 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:33:03,440 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-07-13 19:33:03,440 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:33:03,440 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:33:03,441 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-07-13 19:33:03,460 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:33:03,460 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1390498924] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:33:03,460 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:33:03,460 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-07-13 19:33:03,460 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529629657] [2021-07-13 19:33:03,461 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:33:03,461 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:33:03,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:33:03,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:33:03,461 INFO L87 Difference]: Start difference. First operand 812 states and 2255 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:33:03,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:33:03,702 INFO L93 Difference]: Finished difference Result 940 states and 2502 transitions. [2021-07-13 19:33:03,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 19:33:03,703 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:33:03,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:33:03,704 INFO L225 Difference]: With dead ends: 940 [2021-07-13 19:33:03,704 INFO L226 Difference]: Without dead ends: 940 [2021-07-13 19:33:03,704 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 170.0ms TimeCoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:33:03,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 940 states. [2021-07-13 19:33:03,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 940 to 830. [2021-07-13 19:33:03,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 830 states, 829 states have (on average 2.7889022919179736) internal successors, (2312), 829 states have internal predecessors, (2312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:33:03,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 830 states to 830 states and 2312 transitions. [2021-07-13 19:33:03,713 INFO L78 Accepts]: Start accepts. Automaton has 830 states and 2312 transitions. Word has length 17 [2021-07-13 19:33:03,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:33:03,714 INFO L482 AbstractCegarLoop]: Abstraction has 830 states and 2312 transitions. [2021-07-13 19:33:03,714 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:33:03,714 INFO L276 IsEmpty]: Start isEmpty. Operand 830 states and 2312 transitions. [2021-07-13 19:33:03,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:33:03,715 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:33:03,715 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:33:03,915 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2021,311 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:33:03,915 INFO L430 AbstractCegarLoop]: === Iteration 321 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:33:03,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:33:03,916 INFO L82 PathProgramCache]: Analyzing trace with hash -1057722846, now seen corresponding path program 307 times [2021-07-13 19:33:03,916 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:33:03,916 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788427170] [2021-07-13 19:33:03,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:33:03,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:33:03,996 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:33:03,997 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:33:03,997 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788427170] [2021-07-13 19:33:03,997 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [788427170] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:33:03,997 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1114922508] [2021-07-13 19:33:03,997 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 312 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 312 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:33:04,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:33:04,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 19:33:04,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:33:04,196 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:33:04,197 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:33:04,197 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:33:04,198 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:33:04,200 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:33:04,201 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:33:04,203 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:33:04,204 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:33:04,206 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:33:04,207 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:33:04,209 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:33:04,210 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:33:04,212 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:33:04,212 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:33:04,213 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:33:04,241 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-07-13 19:33:04,241 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:33:04,242 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:33:04,242 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-07-13 19:33:04,269 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:33:04,269 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1114922508] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:33:04,269 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:33:04,269 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-07-13 19:33:04,269 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640166300] [2021-07-13 19:33:04,269 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:33:04,269 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:33:04,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:33:04,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:33:04,270 INFO L87 Difference]: Start difference. First operand 830 states and 2312 transitions. Second operand has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:33:04,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:33:04,752 INFO L93 Difference]: Finished difference Result 894 states and 2398 transitions. [2021-07-13 19:33:04,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-13 19:33:04,752 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:33:04,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:33:04,753 INFO L225 Difference]: With dead ends: 894 [2021-07-13 19:33:04,753 INFO L226 Difference]: Without dead ends: 888 [2021-07-13 19:33:04,754 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 399.8ms TimeCoverageRelationStatistics Valid=96, Invalid=716, Unknown=0, NotChecked=0, Total=812 [2021-07-13 19:33:04,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 888 states. [2021-07-13 19:33:04,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 888 to 832. [2021-07-13 19:33:04,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 832 states, 831 states have (on average 2.782190132370638) internal successors, (2312), 831 states have internal predecessors, (2312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:33:04,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 832 states to 832 states and 2312 transitions. [2021-07-13 19:33:04,762 INFO L78 Accepts]: Start accepts. Automaton has 832 states and 2312 transitions. Word has length 17 [2021-07-13 19:33:04,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:33:04,762 INFO L482 AbstractCegarLoop]: Abstraction has 832 states and 2312 transitions. [2021-07-13 19:33:04,762 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:33:04,762 INFO L276 IsEmpty]: Start isEmpty. Operand 832 states and 2312 transitions. [2021-07-13 19:33:04,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:33:04,763 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:33:04,763 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:33:04,963 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 312 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2024 [2021-07-13 19:33:04,964 INFO L430 AbstractCegarLoop]: === Iteration 322 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:33:04,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:33:04,964 INFO L82 PathProgramCache]: Analyzing trace with hash 1922837664, now seen corresponding path program 308 times [2021-07-13 19:33:04,964 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:33:04,964 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513807010] [2021-07-13 19:33:04,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:33:04,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:33:05,035 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:33:05,035 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:33:05,035 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513807010] [2021-07-13 19:33:05,035 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1513807010] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:33:05,035 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1778786755] [2021-07-13 19:33:05,035 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 313 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 313 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:33:05,062 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:33:05,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:33:05,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 19:33:05,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:33:05,199 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:33:05,200 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:33:05,200 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:33:05,201 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:33:05,203 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:33:05,203 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:33:05,204 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:33:05,225 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-07-13 19:33:05,225 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:33:05,226 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:33:05,226 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-07-13 19:33:05,245 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:33:05,245 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1778786755] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:33:05,245 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:33:05,245 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-07-13 19:33:05,245 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078090661] [2021-07-13 19:33:05,245 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:33:05,245 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:33:05,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:33:05,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:33:05,245 INFO L87 Difference]: Start difference. First operand 832 states and 2312 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:33:05,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:33:05,793 INFO L93 Difference]: Finished difference Result 951 states and 2519 transitions. [2021-07-13 19:33:05,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 19:33:05,793 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:33:05,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:33:05,794 INFO L225 Difference]: With dead ends: 951 [2021-07-13 19:33:05,794 INFO L226 Difference]: Without dead ends: 951 [2021-07-13 19:33:05,794 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 436.5ms TimeCoverageRelationStatistics Valid=126, Invalid=804, Unknown=0, NotChecked=0, Total=930 [2021-07-13 19:33:05,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 951 states. [2021-07-13 19:33:05,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 951 to 827. [2021-07-13 19:33:05,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 827 states, 826 states have (on average 2.7869249394673123) internal successors, (2302), 826 states have internal predecessors, (2302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:33:05,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 827 states to 827 states and 2302 transitions. [2021-07-13 19:33:05,804 INFO L78 Accepts]: Start accepts. Automaton has 827 states and 2302 transitions. Word has length 17 [2021-07-13 19:33:05,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:33:05,804 INFO L482 AbstractCegarLoop]: Abstraction has 827 states and 2302 transitions. [2021-07-13 19:33:05,804 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:33:05,804 INFO L276 IsEmpty]: Start isEmpty. Operand 827 states and 2302 transitions. [2021-07-13 19:33:05,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:33:05,805 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:33:05,805 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:33:06,005 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2031,313 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:33:06,006 INFO L430 AbstractCegarLoop]: === Iteration 323 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:33:06,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:33:06,006 INFO L82 PathProgramCache]: Analyzing trace with hash 1003136956, now seen corresponding path program 309 times [2021-07-13 19:33:06,006 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:33:06,006 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086838639] [2021-07-13 19:33:06,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:33:06,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:33:06,074 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:33:06,074 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:33:06,074 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086838639] [2021-07-13 19:33:06,074 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2086838639] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:33:06,074 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2138579122] [2021-07-13 19:33:06,074 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 314 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 314 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:33:06,101 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 19:33:06,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:33:06,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 19:33:06,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:33:06,253 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:33:06,254 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:33:06,254 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:33:06,255 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:33:06,257 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:33:06,258 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:33:06,260 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:33:06,261 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:33:06,263 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:33:06,264 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:33:06,266 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:33:06,267 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:33:06,269 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:33:06,269 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:33:06,270 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:33:06,299 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-07-13 19:33:06,300 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:33:06,301 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:33:06,301 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-07-13 19:33:06,327 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:33:06,328 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2138579122] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:33:06,328 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:33:06,328 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-07-13 19:33:06,328 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770215295] [2021-07-13 19:33:06,328 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:33:06,328 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:33:06,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:33:06,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:33:06,328 INFO L87 Difference]: Start difference. First operand 827 states and 2302 transitions. Second operand has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:33:06,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:33:06,828 INFO L93 Difference]: Finished difference Result 886 states and 2387 transitions. [2021-07-13 19:33:06,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-13 19:33:06,828 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:33:06,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:33:06,829 INFO L225 Difference]: With dead ends: 886 [2021-07-13 19:33:06,829 INFO L226 Difference]: Without dead ends: 882 [2021-07-13 19:33:06,829 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 455.2ms TimeCoverageRelationStatistics Valid=114, Invalid=756, Unknown=0, NotChecked=0, Total=870 [2021-07-13 19:33:06,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 882 states. [2021-07-13 19:33:06,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 882 to 828. [2021-07-13 19:33:06,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 828 states, 827 states have (on average 2.7835550181378474) internal successors, (2302), 827 states have internal predecessors, (2302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:33:06,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 828 states to 828 states and 2302 transitions. [2021-07-13 19:33:06,838 INFO L78 Accepts]: Start accepts. Automaton has 828 states and 2302 transitions. Word has length 17 [2021-07-13 19:33:06,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:33:06,839 INFO L482 AbstractCegarLoop]: Abstraction has 828 states and 2302 transitions. [2021-07-13 19:33:06,839 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:33:06,839 INFO L276 IsEmpty]: Start isEmpty. Operand 828 states and 2302 transitions. [2021-07-13 19:33:06,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:33:06,840 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:33:06,840 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:33:07,040 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 314 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2034 [2021-07-13 19:33:07,040 INFO L430 AbstractCegarLoop]: === Iteration 324 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:33:07,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:33:07,040 INFO L82 PathProgramCache]: Analyzing trace with hash 1930568062, now seen corresponding path program 310 times [2021-07-13 19:33:07,040 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:33:07,041 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348261314] [2021-07-13 19:33:07,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:33:07,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:33:07,110 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:33:07,110 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:33:07,110 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348261314] [2021-07-13 19:33:07,110 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1348261314] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:33:07,111 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [236367888] [2021-07-13 19:33:07,111 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 315 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 315 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:33:07,137 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:33:07,137 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:33:07,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 19:33:07,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:33:07,258 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:33:07,259 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:33:07,259 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:33:07,260 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:33:07,262 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:33:07,262 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:33:07,262 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:33:07,263 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:33:07,265 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:33:07,266 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:33:07,266 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:33:07,267 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:33:07,268 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:33:07,269 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:33:07,269 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:33:07,302 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-07-13 19:33:07,302 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:33:07,303 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:33:07,303 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-07-13 19:33:07,351 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:33:07,351 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [236367888] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:33:07,351 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:33:07,351 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-07-13 19:33:07,351 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633020937] [2021-07-13 19:33:07,351 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:33:07,351 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:33:07,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:33:07,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:33:07,351 INFO L87 Difference]: Start difference. First operand 828 states and 2302 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:33:07,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:33:07,801 INFO L93 Difference]: Finished difference Result 982 states and 2548 transitions. [2021-07-13 19:33:07,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 19:33:07,801 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:33:07,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:33:07,802 INFO L225 Difference]: With dead ends: 982 [2021-07-13 19:33:07,802 INFO L226 Difference]: Without dead ends: 982 [2021-07-13 19:33:07,803 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 407.6ms TimeCoverageRelationStatistics Valid=112, Invalid=644, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:33:07,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 982 states. [2021-07-13 19:33:07,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 982 to 829. [2021-07-13 19:33:07,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 829 states, 828 states have (on average 2.783816425120773) internal successors, (2305), 828 states have internal predecessors, (2305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:33:07,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 829 states to 829 states and 2305 transitions. [2021-07-13 19:33:07,812 INFO L78 Accepts]: Start accepts. Automaton has 829 states and 2305 transitions. Word has length 17 [2021-07-13 19:33:07,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:33:07,812 INFO L482 AbstractCegarLoop]: Abstraction has 829 states and 2305 transitions. [2021-07-13 19:33:07,812 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:33:07,812 INFO L276 IsEmpty]: Start isEmpty. Operand 829 states and 2305 transitions. [2021-07-13 19:33:07,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:33:07,813 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:33:07,813 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:33:08,013 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2041,315 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:33:08,014 INFO L430 AbstractCegarLoop]: === Iteration 325 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:33:08,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:33:08,014 INFO L82 PathProgramCache]: Analyzing trace with hash -1562783006, now seen corresponding path program 311 times [2021-07-13 19:33:08,014 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:33:08,014 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651901789] [2021-07-13 19:33:08,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:33:08,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:33:08,088 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:33:08,088 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:33:08,088 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651901789] [2021-07-13 19:33:08,088 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [651901789] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:33:08,088 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [86442325] [2021-07-13 19:33:08,088 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 316 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 316 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:33:08,115 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:33:08,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:33:08,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 19:33:08,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:33:08,223 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:33:08,224 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:33:08,224 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:33:08,225 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:33:08,227 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:33:08,227 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:33:08,227 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:33:08,228 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:33:08,230 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:33:08,231 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:33:08,231 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:33:08,231 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:33:08,233 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:33:08,234 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:33:08,234 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:33:08,266 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-07-13 19:33:08,266 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:33:08,266 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:33:08,266 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-07-13 19:33:08,327 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:33:08,327 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [86442325] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:33:08,327 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:33:08,327 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-07-13 19:33:08,327 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567441424] [2021-07-13 19:33:08,328 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:33:08,328 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:33:08,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:33:08,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:33:08,328 INFO L87 Difference]: Start difference. First operand 829 states and 2305 transitions. Second operand has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:33:08,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:33:08,916 INFO L93 Difference]: Finished difference Result 927 states and 2463 transitions. [2021-07-13 19:33:08,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-13 19:33:08,916 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:33:08,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:33:08,917 INFO L225 Difference]: With dead ends: 927 [2021-07-13 19:33:08,917 INFO L226 Difference]: Without dead ends: 923 [2021-07-13 19:33:08,918 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 537.0ms TimeCoverageRelationStatistics Valid=144, Invalid=912, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 19:33:08,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 923 states. [2021-07-13 19:33:08,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 923 to 833. [2021-07-13 19:33:08,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 833 states, 832 states have (on average 2.784855769230769) internal successors, (2317), 832 states have internal predecessors, (2317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:33:08,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 833 states to 833 states and 2317 transitions. [2021-07-13 19:33:08,927 INFO L78 Accepts]: Start accepts. Automaton has 833 states and 2317 transitions. Word has length 17 [2021-07-13 19:33:08,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:33:08,927 INFO L482 AbstractCegarLoop]: Abstraction has 833 states and 2317 transitions. [2021-07-13 19:33:08,927 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:33:08,927 INFO L276 IsEmpty]: Start isEmpty. Operand 833 states and 2317 transitions. [2021-07-13 19:33:08,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:33:08,928 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:33:08,928 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:33:09,128 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 316 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2045 [2021-07-13 19:33:09,129 INFO L430 AbstractCegarLoop]: === Iteration 326 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:33:09,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:33:09,129 INFO L82 PathProgramCache]: Analyzing trace with hash 155560700, now seen corresponding path program 312 times [2021-07-13 19:33:09,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:33:09,129 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136995580] [2021-07-13 19:33:09,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:33:09,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:33:09,203 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:33:09,203 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:33:09,203 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136995580] [2021-07-13 19:33:09,203 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2136995580] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:33:09,203 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1098898982] [2021-07-13 19:33:09,203 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 317 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 317 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:33:09,229 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:33:09,229 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:33:09,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 19:33:09,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:33:09,342 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:33:09,342 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:33:09,343 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:33:09,343 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:33:09,345 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:33:09,346 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:33:09,346 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:33:09,347 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:33:09,349 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:33:09,349 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:33:09,350 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:33:09,350 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:33:09,352 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:33:09,352 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:33:09,353 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:33:09,385 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-07-13 19:33:09,385 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:33:09,385 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:33:09,385 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-07-13 19:33:09,435 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:33:09,435 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1098898982] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:33:09,435 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:33:09,435 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-07-13 19:33:09,435 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28968843] [2021-07-13 19:33:09,436 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:33:09,436 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:33:09,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:33:09,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:33:09,436 INFO L87 Difference]: Start difference. First operand 833 states and 2317 transitions. Second operand has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:33:09,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:33:09,847 INFO L93 Difference]: Finished difference Result 915 states and 2448 transitions. [2021-07-13 19:33:09,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 19:33:09,847 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:33:09,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:33:09,848 INFO L225 Difference]: With dead ends: 915 [2021-07-13 19:33:09,848 INFO L226 Difference]: Without dead ends: 915 [2021-07-13 19:33:09,849 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 356.7ms TimeCoverageRelationStatistics Valid=94, Invalid=506, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:33:09,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 915 states. [2021-07-13 19:33:09,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 915 to 827. [2021-07-13 19:33:09,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 827 states, 826 states have (on average 2.777239709443099) internal successors, (2294), 826 states have internal predecessors, (2294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:33:09,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 827 states to 827 states and 2294 transitions. [2021-07-13 19:33:09,858 INFO L78 Accepts]: Start accepts. Automaton has 827 states and 2294 transitions. Word has length 17 [2021-07-13 19:33:09,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:33:09,858 INFO L482 AbstractCegarLoop]: Abstraction has 827 states and 2294 transitions. [2021-07-13 19:33:09,858 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:33:09,858 INFO L276 IsEmpty]: Start isEmpty. Operand 827 states and 2294 transitions. [2021-07-13 19:33:09,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:33:09,859 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:33:09,859 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:33:10,059 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2051,317 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:33:10,059 INFO L430 AbstractCegarLoop]: === Iteration 327 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:33:10,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:33:10,060 INFO L82 PathProgramCache]: Analyzing trace with hash 316207332, now seen corresponding path program 313 times [2021-07-13 19:33:10,060 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:33:10,060 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562578273] [2021-07-13 19:33:10,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:33:10,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:33:10,121 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:33:10,121 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:33:10,121 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562578273] [2021-07-13 19:33:10,121 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1562578273] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:33:10,121 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [952951989] [2021-07-13 19:33:10,121 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 318 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 318 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:33:10,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:33:10,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 19:33:10,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:33:10,250 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:33:10,250 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:33:10,250 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:33:10,251 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:33:10,253 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:33:10,254 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:33:10,254 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:33:10,255 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:33:10,257 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:33:10,257 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:33:10,257 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:33:10,258 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:33:10,260 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:33:10,260 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:33:10,261 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:33:10,293 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-07-13 19:33:10,293 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:33:10,294 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:33:10,294 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-07-13 19:33:10,359 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:33:10,360 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [952951989] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:33:10,360 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:33:10,360 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 17 [2021-07-13 19:33:10,360 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515825260] [2021-07-13 19:33:10,360 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:33:10,360 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:33:10,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:33:10,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:33:10,360 INFO L87 Difference]: Start difference. First operand 827 states and 2294 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:33:10,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:33:10,736 INFO L93 Difference]: Finished difference Result 861 states and 2351 transitions. [2021-07-13 19:33:10,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 19:33:10,736 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:33:10,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:33:10,737 INFO L225 Difference]: With dead ends: 861 [2021-07-13 19:33:10,737 INFO L226 Difference]: Without dead ends: 857 [2021-07-13 19:33:10,737 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 420.3ms TimeCoverageRelationStatistics Valid=113, Invalid=643, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:33:10,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 857 states. [2021-07-13 19:33:10,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 857 to 823. [2021-07-13 19:33:10,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 823 states, 822 states have (on average 2.778588807785888) internal successors, (2284), 822 states have internal predecessors, (2284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:33:10,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 823 states to 823 states and 2284 transitions. [2021-07-13 19:33:10,746 INFO L78 Accepts]: Start accepts. Automaton has 823 states and 2284 transitions. Word has length 17 [2021-07-13 19:33:10,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:33:10,746 INFO L482 AbstractCegarLoop]: Abstraction has 823 states and 2284 transitions. [2021-07-13 19:33:10,746 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:33:10,746 INFO L276 IsEmpty]: Start isEmpty. Operand 823 states and 2284 transitions. [2021-07-13 19:33:10,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:33:10,747 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:33:10,747 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:33:10,947 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2055,318 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:33:10,948 INFO L430 AbstractCegarLoop]: === Iteration 328 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:33:10,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:33:10,948 INFO L82 PathProgramCache]: Analyzing trace with hash -1950236700, now seen corresponding path program 314 times [2021-07-13 19:33:10,948 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:33:10,948 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146223817] [2021-07-13 19:33:10,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:33:10,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:33:11,003 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:33:11,004 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:33:11,004 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146223817] [2021-07-13 19:33:11,004 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [146223817] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:33:11,004 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1533289480] [2021-07-13 19:33:11,004 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 319 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 319 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:33:11,029 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:33:11,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:33:11,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 19:33:11,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:33:11,157 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:33:11,158 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:33:11,158 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:33:11,159 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:33:11,161 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:33:11,161 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:33:11,162 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:33:11,182 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-07-13 19:33:11,182 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:33:11,183 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:33:11,183 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-07-13 19:33:11,201 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:33:11,201 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1533289480] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:33:11,201 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:33:11,201 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 17 [2021-07-13 19:33:11,201 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498576352] [2021-07-13 19:33:11,201 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:33:11,202 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:33:11,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:33:11,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:33:11,202 INFO L87 Difference]: Start difference. First operand 823 states and 2284 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:33:11,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:33:11,403 INFO L93 Difference]: Finished difference Result 932 states and 2492 transitions. [2021-07-13 19:33:11,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:33:11,403 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:33:11,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:33:11,405 INFO L225 Difference]: With dead ends: 932 [2021-07-13 19:33:11,405 INFO L226 Difference]: Without dead ends: 932 [2021-07-13 19:33:11,405 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 151.5ms TimeCoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:33:11,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 932 states. [2021-07-13 19:33:11,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 932 to 838. [2021-07-13 19:33:11,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 838 states, 837 states have (on average 2.7897252090800477) internal successors, (2335), 837 states have internal predecessors, (2335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:33:11,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 838 states to 838 states and 2335 transitions. [2021-07-13 19:33:11,414 INFO L78 Accepts]: Start accepts. Automaton has 838 states and 2335 transitions. Word has length 17 [2021-07-13 19:33:11,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:33:11,414 INFO L482 AbstractCegarLoop]: Abstraction has 838 states and 2335 transitions. [2021-07-13 19:33:11,414 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:33:11,414 INFO L276 IsEmpty]: Start isEmpty. Operand 838 states and 2335 transitions. [2021-07-13 19:33:11,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:33:11,415 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:33:11,415 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:33:11,617 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 319 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2060 [2021-07-13 19:33:11,617 INFO L430 AbstractCegarLoop]: === Iteration 329 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:33:11,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:33:11,617 INFO L82 PathProgramCache]: Analyzing trace with hash 1425029888, now seen corresponding path program 315 times [2021-07-13 19:33:11,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:33:11,617 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876484177] [2021-07-13 19:33:11,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:33:11,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:33:11,673 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:33:11,674 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:33:11,674 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876484177] [2021-07-13 19:33:11,674 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [876484177] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:33:11,674 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1515735243] [2021-07-13 19:33:11,674 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 320 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 320 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:33:11,707 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-13 19:33:11,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:33:11,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 19:33:11,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:33:11,840 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:33:11,840 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:33:11,841 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:33:11,841 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:33:11,843 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:33:11,844 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:33:11,846 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:33:11,847 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:33:11,849 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:33:11,850 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:33:11,852 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:33:11,853 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:33:11,855 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:33:11,855 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:33:11,856 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:33:11,885 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-07-13 19:33:11,885 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:33:11,886 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:33:11,886 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-07-13 19:33:11,911 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:33:11,911 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1515735243] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:33:11,911 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:33:11,911 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 17 [2021-07-13 19:33:11,911 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056203985] [2021-07-13 19:33:11,911 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:33:11,911 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:33:11,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:33:11,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:33:11,912 INFO L87 Difference]: Start difference. First operand 838 states and 2335 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:33:12,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:33:12,295 INFO L93 Difference]: Finished difference Result 896 states and 2417 transitions. [2021-07-13 19:33:12,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 19:33:12,295 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:33:12,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:33:12,296 INFO L225 Difference]: With dead ends: 896 [2021-07-13 19:33:12,296 INFO L226 Difference]: Without dead ends: 892 [2021-07-13 19:33:12,297 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 302.7ms TimeCoverageRelationStatistics Valid=86, Invalid=564, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:33:12,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 892 states. [2021-07-13 19:33:12,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 892 to 838. [2021-07-13 19:33:12,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 838 states, 837 states have (on average 2.7873357228195936) internal successors, (2333), 837 states have internal predecessors, (2333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:33:12,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 838 states to 838 states and 2333 transitions. [2021-07-13 19:33:12,307 INFO L78 Accepts]: Start accepts. Automaton has 838 states and 2333 transitions. Word has length 17 [2021-07-13 19:33:12,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:33:12,307 INFO L482 AbstractCegarLoop]: Abstraction has 838 states and 2333 transitions. [2021-07-13 19:33:12,307 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:33:12,307 INFO L276 IsEmpty]: Start isEmpty. Operand 838 states and 2333 transitions. [2021-07-13 19:33:12,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:33:12,308 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:33:12,308 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:33:12,508 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2063,320 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:33:12,508 INFO L430 AbstractCegarLoop]: === Iteration 330 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:33:12,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:33:12,509 INFO L82 PathProgramCache]: Analyzing trace with hash -1942506302, now seen corresponding path program 316 times [2021-07-13 19:33:12,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:33:12,509 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284181464] [2021-07-13 19:33:12,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:33:12,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:33:12,570 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:33:12,570 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:33:12,570 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284181464] [2021-07-13 19:33:12,570 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [284181464] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:33:12,570 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [931081656] [2021-07-13 19:33:12,570 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 321 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 321 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:33:12,596 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:33:12,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:33:12,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 19:33:12,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:33:12,690 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:33:12,691 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:33:12,691 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:33:12,692 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:33:12,694 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:33:12,694 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:33:12,694 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:33:12,695 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:33:12,697 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:33:12,698 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:33:12,698 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:33:12,699 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:33:12,701 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:33:12,701 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:33:12,702 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:33:12,734 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-07-13 19:33:12,734 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:33:12,734 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:33:12,734 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-07-13 19:33:12,780 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:33:12,781 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [931081656] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:33:12,781 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:33:12,781 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 17 [2021-07-13 19:33:12,781 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379194605] [2021-07-13 19:33:12,781 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:33:12,781 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:33:12,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:33:12,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:33:12,781 INFO L87 Difference]: Start difference. First operand 838 states and 2333 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:33:13,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:33:13,049 INFO L93 Difference]: Finished difference Result 949 states and 2506 transitions. [2021-07-13 19:33:13,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:33:13,049 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:33:13,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:33:13,050 INFO L225 Difference]: With dead ends: 949 [2021-07-13 19:33:13,050 INFO L226 Difference]: Without dead ends: 948 [2021-07-13 19:33:13,050 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 256.6ms TimeCoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:33:13,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 948 states. [2021-07-13 19:33:13,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 948 to 839. [2021-07-13 19:33:13,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 839 states, 838 states have (on average 2.788782816229117) internal successors, (2337), 838 states have internal predecessors, (2337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:33:13,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 839 states to 839 states and 2337 transitions. [2021-07-13 19:33:13,060 INFO L78 Accepts]: Start accepts. Automaton has 839 states and 2337 transitions. Word has length 17 [2021-07-13 19:33:13,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:33:13,060 INFO L482 AbstractCegarLoop]: Abstraction has 839 states and 2337 transitions. [2021-07-13 19:33:13,060 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:33:13,061 INFO L276 IsEmpty]: Start isEmpty. Operand 839 states and 2337 transitions. [2021-07-13 19:33:13,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:33:13,061 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:33:13,062 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:33:13,262 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2070,321 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:33:13,262 INFO L430 AbstractCegarLoop]: === Iteration 331 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:33:13,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:33:13,262 INFO L82 PathProgramCache]: Analyzing trace with hash -1140890074, now seen corresponding path program 317 times [2021-07-13 19:33:13,262 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:33:13,262 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667701232] [2021-07-13 19:33:13,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:33:13,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:33:13,323 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:33:13,323 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:33:13,323 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667701232] [2021-07-13 19:33:13,323 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [667701232] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:33:13,323 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [618081702] [2021-07-13 19:33:13,323 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 322 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 322 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:33:13,350 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-13 19:33:13,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:33:13,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 19:33:13,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:33:13,454 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:33:13,454 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:33:13,455 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:33:13,455 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:33:13,457 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:33:13,458 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:33:13,458 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:33:13,459 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:33:13,461 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:33:13,461 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:33:13,462 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:33:13,462 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:33:13,464 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:33:13,464 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:33:13,465 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:33:13,497 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-07-13 19:33:13,497 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:33:13,498 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:33:13,498 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-07-13 19:33:13,558 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:33:13,558 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [618081702] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:33:13,558 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:33:13,558 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 17 [2021-07-13 19:33:13,558 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487920874] [2021-07-13 19:33:13,558 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:33:13,558 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:33:13,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:33:13,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:33:13,558 INFO L87 Difference]: Start difference. First operand 839 states and 2337 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:33:14,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:33:14,020 INFO L93 Difference]: Finished difference Result 925 states and 2478 transitions. [2021-07-13 19:33:14,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-13 19:33:14,021 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:33:14,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:33:14,022 INFO L225 Difference]: With dead ends: 925 [2021-07-13 19:33:14,022 INFO L226 Difference]: Without dead ends: 921 [2021-07-13 19:33:14,022 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 413.7ms TimeCoverageRelationStatistics Valid=117, Invalid=695, Unknown=0, NotChecked=0, Total=812 [2021-07-13 19:33:14,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 921 states. [2021-07-13 19:33:14,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 921 to 844. [2021-07-13 19:33:14,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 844 states, 843 states have (on average 2.792408066429419) internal successors, (2354), 843 states have internal predecessors, (2354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:33:14,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 844 states to 844 states and 2354 transitions. [2021-07-13 19:33:14,032 INFO L78 Accepts]: Start accepts. Automaton has 844 states and 2354 transitions. Word has length 17 [2021-07-13 19:33:14,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:33:14,032 INFO L482 AbstractCegarLoop]: Abstraction has 844 states and 2354 transitions. [2021-07-13 19:33:14,032 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:33:14,032 INFO L276 IsEmpty]: Start isEmpty. Operand 844 states and 2354 transitions. [2021-07-13 19:33:14,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:33:14,033 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:33:14,033 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:33:14,233 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2074,322 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:33:14,233 INFO L430 AbstractCegarLoop]: === Iteration 332 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:33:14,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:33:14,233 INFO L82 PathProgramCache]: Analyzing trace with hash 577453632, now seen corresponding path program 318 times [2021-07-13 19:33:14,234 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:33:14,234 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317847633] [2021-07-13 19:33:14,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:33:14,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:33:14,304 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:33:14,304 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:33:14,304 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317847633] [2021-07-13 19:33:14,305 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [317847633] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:33:14,305 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1449192589] [2021-07-13 19:33:14,305 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 323 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 323 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:33:14,331 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:33:14,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:33:14,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 19:33:14,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:33:14,425 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:33:14,425 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:33:14,426 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:33:14,426 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:33:14,428 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:33:14,429 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:33:14,429 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:33:14,430 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:33:14,432 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:33:14,432 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:33:14,433 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:33:14,433 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:33:14,435 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:33:14,435 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:33:14,436 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:33:14,468 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-07-13 19:33:14,468 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:33:14,468 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:33:14,469 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-07-13 19:33:14,516 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:33:14,516 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1449192589] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:33:14,516 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:33:14,516 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 17 [2021-07-13 19:33:14,516 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90668214] [2021-07-13 19:33:14,516 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:33:14,516 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:33:14,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:33:14,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:33:14,517 INFO L87 Difference]: Start difference. First operand 844 states and 2354 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:33:14,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:33:14,831 INFO L93 Difference]: Finished difference Result 912 states and 2456 transitions. [2021-07-13 19:33:14,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:33:14,831 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:33:14,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:33:14,832 INFO L225 Difference]: With dead ends: 912 [2021-07-13 19:33:14,832 INFO L226 Difference]: Without dead ends: 912 [2021-07-13 19:33:14,833 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 251.9ms TimeCoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:33:14,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 912 states. [2021-07-13 19:33:14,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 912 to 826. [2021-07-13 19:33:14,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 826 states, 825 states have (on average 2.7793939393939393) internal successors, (2293), 825 states have internal predecessors, (2293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:33:14,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 826 states to 826 states and 2293 transitions. [2021-07-13 19:33:14,842 INFO L78 Accepts]: Start accepts. Automaton has 826 states and 2293 transitions. Word has length 17 [2021-07-13 19:33:14,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:33:14,842 INFO L482 AbstractCegarLoop]: Abstraction has 826 states and 2293 transitions. [2021-07-13 19:33:14,842 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:33:14,842 INFO L276 IsEmpty]: Start isEmpty. Operand 826 states and 2293 transitions. [2021-07-13 19:33:14,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:33:14,843 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:33:14,843 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:33:15,043 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2080,323 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:33:15,043 INFO L430 AbstractCegarLoop]: === Iteration 333 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:33:15,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:33:15,044 INFO L82 PathProgramCache]: Analyzing trace with hash -1824390112, now seen corresponding path program 319 times [2021-07-13 19:33:15,044 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:33:15,044 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075543532] [2021-07-13 19:33:15,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:33:15,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:33:15,108 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:33:15,108 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:33:15,108 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075543532] [2021-07-13 19:33:15,108 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2075543532] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:33:15,108 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1962231686] [2021-07-13 19:33:15,109 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 324 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 324 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:33:15,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:33:15,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 19:33:15,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:33:15,231 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:33:15,231 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:33:15,232 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:33:15,232 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:33:15,234 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:33:15,235 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:33:15,235 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:33:15,236 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:33:15,238 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:33:15,238 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:33:15,239 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:33:15,239 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:33:15,241 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:33:15,241 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:33:15,242 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:33:15,273 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-07-13 19:33:15,274 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:33:15,274 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:33:15,274 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-07-13 19:33:15,338 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:33:15,339 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1962231686] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:33:15,339 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:33:15,339 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 17 [2021-07-13 19:33:15,339 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480323555] [2021-07-13 19:33:15,339 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:33:15,339 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:33:15,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:33:15,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:33:15,339 INFO L87 Difference]: Start difference. First operand 826 states and 2293 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:33:15,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:33:15,607 INFO L93 Difference]: Finished difference Result 904 states and 2426 transitions. [2021-07-13 19:33:15,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 19:33:15,608 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:33:15,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:33:15,609 INFO L225 Difference]: With dead ends: 904 [2021-07-13 19:33:15,609 INFO L226 Difference]: Without dead ends: 900 [2021-07-13 19:33:15,609 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 312.6ms TimeCoverageRelationStatistics Valid=90, Invalid=462, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:33:15,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 900 states. [2021-07-13 19:33:15,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 900 to 831. [2021-07-13 19:33:15,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 831 states, 830 states have (on average 2.7819277108433735) internal successors, (2309), 830 states have internal predecessors, (2309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:33:15,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 831 states to 831 states and 2309 transitions. [2021-07-13 19:33:15,624 INFO L78 Accepts]: Start accepts. Automaton has 831 states and 2309 transitions. Word has length 17 [2021-07-13 19:33:15,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:33:15,624 INFO L482 AbstractCegarLoop]: Abstraction has 831 states and 2309 transitions. [2021-07-13 19:33:15,624 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:33:15,625 INFO L276 IsEmpty]: Start isEmpty. Operand 831 states and 2309 transitions. [2021-07-13 19:33:15,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:33:15,625 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:33:15,626 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:33:15,826 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 324 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2084 [2021-07-13 19:33:15,826 INFO L430 AbstractCegarLoop]: === Iteration 334 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:33:15,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:33:15,826 INFO L82 PathProgramCache]: Analyzing trace with hash -95342778, now seen corresponding path program 320 times [2021-07-13 19:33:15,826 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:33:15,826 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406375744] [2021-07-13 19:33:15,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:33:15,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:33:15,885 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:33:15,886 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:33:15,886 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406375744] [2021-07-13 19:33:15,886 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406375744] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:33:15,886 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [725054901] [2021-07-13 19:33:15,886 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 325 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 325 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:33:15,913 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:33:15,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:33:15,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 19:33:15,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:33:16,025 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:33:16,025 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:33:16,025 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:33:16,026 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:33:16,028 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:33:16,029 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:33:16,031 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:33:16,032 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:33:16,034 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:33:16,035 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:33:16,037 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:33:16,037 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:33:16,039 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:33:16,040 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:33:16,040 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:33:16,071 INFO L628 ElimStorePlain]: treesize reduction 43, result has 40.3 percent of original size [2021-07-13 19:33:16,071 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:33:16,071 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:33:16,071 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 2 variables, input treesize:125, output treesize:29 [2021-07-13 19:33:16,100 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:33:16,100 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [725054901] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:33:16,100 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:33:16,100 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 17 [2021-07-13 19:33:16,100 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941110884] [2021-07-13 19:33:16,100 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:33:16,100 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:33:16,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:33:16,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:33:16,100 INFO L87 Difference]: Start difference. First operand 831 states and 2309 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:33:16,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:33:16,308 INFO L93 Difference]: Finished difference Result 870 states and 2366 transitions. [2021-07-13 19:33:16,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 19:33:16,309 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:33:16,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:33:16,310 INFO L225 Difference]: With dead ends: 870 [2021-07-13 19:33:16,310 INFO L226 Difference]: Without dead ends: 862 [2021-07-13 19:33:16,310 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 231.3ms TimeCoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:33:16,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 862 states. [2021-07-13 19:33:16,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 862 to 830. [2021-07-13 19:33:16,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 830 states, 829 states have (on average 2.778045838359469) internal successors, (2303), 829 states have internal predecessors, (2303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:33:16,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 830 states to 830 states and 2303 transitions. [2021-07-13 19:33:16,319 INFO L78 Accepts]: Start accepts. Automaton has 830 states and 2303 transitions. Word has length 17 [2021-07-13 19:33:16,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:33:16,319 INFO L482 AbstractCegarLoop]: Abstraction has 830 states and 2303 transitions. [2021-07-13 19:33:16,319 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:33:16,319 INFO L276 IsEmpty]: Start isEmpty. Operand 830 states and 2303 transitions. [2021-07-13 19:33:16,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:33:16,320 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:33:16,320 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:33:16,520 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 325 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2089 [2021-07-13 19:33:16,520 INFO L430 AbstractCegarLoop]: === Iteration 335 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:33:16,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:33:16,521 INFO L82 PathProgramCache]: Analyzing trace with hash 842049790, now seen corresponding path program 321 times [2021-07-13 19:33:16,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:33:16,521 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974745098] [2021-07-13 19:33:16,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:33:16,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:33:16,621 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:33:16,622 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:33:16,622 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974745098] [2021-07-13 19:33:16,622 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [974745098] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:33:16,622 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [268930126] [2021-07-13 19:33:16,622 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 326 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 326 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:33:16,650 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 19:33:16,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:33:16,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 19:33:16,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:33:16,784 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:33:16,784 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:33:16,785 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:33:16,785 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:33:16,787 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:33:16,788 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:33:16,788 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:33:16,789 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:33:16,791 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:33:16,791 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:33:16,792 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:33:16,792 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:33:16,794 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:33:16,794 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:33:16,795 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:33:16,827 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-07-13 19:33:16,827 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:33:16,827 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:33:16,827 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-07-13 19:33:16,877 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:33:16,877 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [268930126] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:33:16,877 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:33:16,877 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-13 19:33:16,877 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485049903] [2021-07-13 19:33:16,877 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:33:16,877 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:33:16,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:33:16,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:33:16,878 INFO L87 Difference]: Start difference. First operand 830 states and 2303 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:33:17,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:33:17,240 INFO L93 Difference]: Finished difference Result 1009 states and 2637 transitions. [2021-07-13 19:33:17,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:33:17,241 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:33:17,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:33:17,242 INFO L225 Difference]: With dead ends: 1009 [2021-07-13 19:33:17,242 INFO L226 Difference]: Without dead ends: 1009 [2021-07-13 19:33:17,242 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 408.7ms TimeCoverageRelationStatistics Valid=105, Invalid=597, Unknown=0, NotChecked=0, Total=702 [2021-07-13 19:33:17,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1009 states. [2021-07-13 19:33:17,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1009 to 854. [2021-07-13 19:33:17,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 854 states, 853 states have (on average 2.8007033997655335) internal successors, (2389), 853 states have internal predecessors, (2389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:33:17,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 854 states to 854 states and 2389 transitions. [2021-07-13 19:33:17,252 INFO L78 Accepts]: Start accepts. Automaton has 854 states and 2389 transitions. Word has length 17 [2021-07-13 19:33:17,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:33:17,252 INFO L482 AbstractCegarLoop]: Abstraction has 854 states and 2389 transitions. [2021-07-13 19:33:17,252 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:33:17,252 INFO L276 IsEmpty]: Start isEmpty. Operand 854 states and 2389 transitions. [2021-07-13 19:33:17,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:33:17,253 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:33:17,253 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:33:17,453 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 326 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2093 [2021-07-13 19:33:17,453 INFO L430 AbstractCegarLoop]: === Iteration 336 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:33:17,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:33:17,454 INFO L82 PathProgramCache]: Analyzing trace with hash 1643666018, now seen corresponding path program 322 times [2021-07-13 19:33:17,454 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:33:17,454 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871063511] [2021-07-13 19:33:17,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:33:17,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:33:17,543 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:33:17,543 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:33:17,543 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871063511] [2021-07-13 19:33:17,543 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [871063511] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:33:17,543 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [890266992] [2021-07-13 19:33:17,543 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 327 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 327 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:33:17,569 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:33:17,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:33:17,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 19:33:17,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:33:17,709 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:33:17,710 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:33:17,710 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:33:17,711 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:33:17,713 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:33:17,713 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:33:17,713 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:33:17,714 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:33:17,716 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:33:17,717 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:33:17,717 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:33:17,717 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:33:17,719 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:33:17,720 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:33:17,720 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:33:17,752 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-07-13 19:33:17,752 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:33:17,753 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:33:17,753 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-07-13 19:33:17,817 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:33:17,818 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [890266992] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:33:17,818 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:33:17,818 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-13 19:33:17,818 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790797013] [2021-07-13 19:33:17,818 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:33:17,818 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:33:17,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:33:17,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:33:17,818 INFO L87 Difference]: Start difference. First operand 854 states and 2389 transitions. Second operand has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:33:18,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:33:18,731 INFO L93 Difference]: Finished difference Result 1042 states and 2727 transitions. [2021-07-13 19:33:18,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-07-13 19:33:18,731 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:33:18,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:33:18,733 INFO L225 Difference]: With dead ends: 1042 [2021-07-13 19:33:18,733 INFO L226 Difference]: Without dead ends: 1031 [2021-07-13 19:33:18,733 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 419 ImplicationChecksByTransitivity, 825.3ms TimeCoverageRelationStatistics Valid=205, Invalid=1517, Unknown=0, NotChecked=0, Total=1722 [2021-07-13 19:33:18,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1031 states. [2021-07-13 19:33:18,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1031 to 876. [2021-07-13 19:33:18,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 876 states, 875 states have (on average 2.8182857142857145) internal successors, (2466), 875 states have internal predecessors, (2466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:33:18,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 876 states to 876 states and 2466 transitions. [2021-07-13 19:33:18,744 INFO L78 Accepts]: Start accepts. Automaton has 876 states and 2466 transitions. Word has length 17 [2021-07-13 19:33:18,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:33:18,744 INFO L482 AbstractCegarLoop]: Abstraction has 876 states and 2466 transitions. [2021-07-13 19:33:18,744 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:33:18,744 INFO L276 IsEmpty]: Start isEmpty. Operand 876 states and 2466 transitions. [2021-07-13 19:33:18,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:33:18,745 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:33:18,745 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:33:18,945 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2097,327 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:33:18,945 INFO L430 AbstractCegarLoop]: === Iteration 337 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:33:18,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:33:18,946 INFO L82 PathProgramCache]: Analyzing trace with hash -932957572, now seen corresponding path program 323 times [2021-07-13 19:33:18,946 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:33:18,946 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138785785] [2021-07-13 19:33:18,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:33:18,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:33:19,034 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:33:19,034 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:33:19,034 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138785785] [2021-07-13 19:33:19,034 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1138785785] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:33:19,035 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1627694377] [2021-07-13 19:33:19,035 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 328 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 328 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:33:19,061 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:33:19,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:33:19,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 19:33:19,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:33:19,179 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:33:19,180 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:33:19,180 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:33:19,181 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:33:19,183 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:33:19,183 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:33:19,183 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:33:19,184 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:33:19,186 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:33:19,187 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:33:19,187 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:33:19,188 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:33:19,190 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:33:19,190 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:33:19,190 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:33:19,225 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-07-13 19:33:19,225 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:33:19,226 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:33:19,226 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-07-13 19:33:19,281 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:33:19,282 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1627694377] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:33:19,282 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:33:19,282 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-13 19:33:19,282 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361266331] [2021-07-13 19:33:19,282 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:33:19,282 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:33:19,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:33:19,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:33:19,282 INFO L87 Difference]: Start difference. First operand 876 states and 2466 transitions. Second operand has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:33:19,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:33:19,688 INFO L93 Difference]: Finished difference Result 1018 states and 2686 transitions. [2021-07-13 19:33:19,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 19:33:19,689 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:33:19,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:33:19,690 INFO L225 Difference]: With dead ends: 1018 [2021-07-13 19:33:19,690 INFO L226 Difference]: Without dead ends: 1018 [2021-07-13 19:33:19,690 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 453.7ms TimeCoverageRelationStatistics Valid=128, Invalid=742, Unknown=0, NotChecked=0, Total=870 [2021-07-13 19:33:19,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1018 states. [2021-07-13 19:33:19,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1018 to 876. [2021-07-13 19:33:19,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 876 states, 875 states have (on average 2.8034285714285714) internal successors, (2453), 875 states have internal predecessors, (2453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:33:19,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 876 states to 876 states and 2453 transitions. [2021-07-13 19:33:19,700 INFO L78 Accepts]: Start accepts. Automaton has 876 states and 2453 transitions. Word has length 17 [2021-07-13 19:33:19,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:33:19,700 INFO L482 AbstractCegarLoop]: Abstraction has 876 states and 2453 transitions. [2021-07-13 19:33:19,700 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:33:19,700 INFO L276 IsEmpty]: Start isEmpty. Operand 876 states and 2453 transitions. [2021-07-13 19:33:19,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:33:19,701 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:33:19,701 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:33:19,902 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2103,328 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:33:19,902 INFO L430 AbstractCegarLoop]: === Iteration 338 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:33:19,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:33:19,902 INFO L82 PathProgramCache]: Analyzing trace with hash 1651396416, now seen corresponding path program 324 times [2021-07-13 19:33:19,902 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:33:19,902 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89540757] [2021-07-13 19:33:19,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:33:19,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:33:19,982 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:33:19,982 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:33:19,982 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89540757] [2021-07-13 19:33:19,982 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [89540757] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:33:19,982 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1300439342] [2021-07-13 19:33:19,982 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 329 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 329 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:33:20,010 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:33:20,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:33:20,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 19:33:20,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:33:20,146 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:33:20,146 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:33:20,147 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:33:20,147 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:33:20,149 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:33:20,149 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:33:20,150 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:33:20,173 INFO L628 ElimStorePlain]: treesize reduction 30, result has 33.3 percent of original size [2021-07-13 19:33:20,173 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:33:20,173 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:33:20,173 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:59, output treesize:15 [2021-07-13 19:33:20,196 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:33:20,196 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1300439342] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:33:20,197 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:33:20,197 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-13 19:33:20,197 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287776221] [2021-07-13 19:33:20,197 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:33:20,197 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:33:20,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:33:20,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:33:20,197 INFO L87 Difference]: Start difference. First operand 876 states and 2453 transitions. Second operand has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:33:20,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:33:20,978 INFO L93 Difference]: Finished difference Result 1064 states and 2766 transitions. [2021-07-13 19:33:20,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-13 19:33:20,978 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:33:20,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:33:20,979 INFO L225 Difference]: With dead ends: 1064 [2021-07-13 19:33:20,980 INFO L226 Difference]: Without dead ends: 1064 [2021-07-13 19:33:20,980 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 382 ImplicationChecksByTransitivity, 701.1ms TimeCoverageRelationStatistics Valid=197, Invalid=1443, Unknown=0, NotChecked=0, Total=1640 [2021-07-13 19:33:20,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1064 states. [2021-07-13 19:33:20,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1064 to 873. [2021-07-13 19:33:20,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 873 states, 872 states have (on average 2.7924311926605503) internal successors, (2435), 872 states have internal predecessors, (2435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:33:20,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 873 states to 873 states and 2435 transitions. [2021-07-13 19:33:20,990 INFO L78 Accepts]: Start accepts. Automaton has 873 states and 2435 transitions. Word has length 17 [2021-07-13 19:33:20,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:33:20,990 INFO L482 AbstractCegarLoop]: Abstraction has 873 states and 2435 transitions. [2021-07-13 19:33:20,990 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:33:20,990 INFO L276 IsEmpty]: Start isEmpty. Operand 873 states and 2435 transitions. [2021-07-13 19:33:20,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:33:20,991 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:33:20,991 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:33:21,191 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 329 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2107 [2021-07-13 19:33:21,192 INFO L430 AbstractCegarLoop]: === Iteration 339 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:33:21,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:33:21,192 INFO L82 PathProgramCache]: Analyzing trace with hash 161991420, now seen corresponding path program 325 times [2021-07-13 19:33:21,192 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:33:21,192 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104662284] [2021-07-13 19:33:21,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:33:21,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:33:21,272 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:33:21,273 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:33:21,273 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104662284] [2021-07-13 19:33:21,273 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [104662284] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:33:21,273 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1100523003] [2021-07-13 19:33:21,273 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 330 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 330 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:33:21,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:33:21,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 19:33:21,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:33:21,428 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:33:21,429 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:33:21,429 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:33:21,430 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:33:21,432 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:33:21,432 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:33:21,433 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:33:21,449 INFO L628 ElimStorePlain]: treesize reduction 30, result has 33.3 percent of original size [2021-07-13 19:33:21,449 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:33:21,450 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:33:21,450 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:59, output treesize:15 [2021-07-13 19:33:21,472 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:33:21,472 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1100523003] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:33:21,472 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:33:21,472 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-13 19:33:21,472 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741076829] [2021-07-13 19:33:21,473 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:33:21,473 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:33:21,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:33:21,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:33:21,473 INFO L87 Difference]: Start difference. First operand 873 states and 2435 transitions. Second operand has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:33:22,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:33:22,476 INFO L93 Difference]: Finished difference Result 1134 states and 2895 transitions. [2021-07-13 19:33:22,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-07-13 19:33:22,476 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:33:22,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:33:22,478 INFO L225 Difference]: With dead ends: 1134 [2021-07-13 19:33:22,478 INFO L226 Difference]: Without dead ends: 1134 [2021-07-13 19:33:22,478 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 635 ImplicationChecksByTransitivity, 890.6ms TimeCoverageRelationStatistics Valid=289, Invalid=2063, Unknown=0, NotChecked=0, Total=2352 [2021-07-13 19:33:22,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1134 states. [2021-07-13 19:33:22,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1134 to 865. [2021-07-13 19:33:22,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 865 states, 864 states have (on average 2.792824074074074) internal successors, (2413), 864 states have internal predecessors, (2413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:33:22,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 865 states to 865 states and 2413 transitions. [2021-07-13 19:33:22,489 INFO L78 Accepts]: Start accepts. Automaton has 865 states and 2413 transitions. Word has length 17 [2021-07-13 19:33:22,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:33:22,489 INFO L482 AbstractCegarLoop]: Abstraction has 865 states and 2413 transitions. [2021-07-13 19:33:22,489 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:33:22,489 INFO L276 IsEmpty]: Start isEmpty. Operand 865 states and 2413 transitions. [2021-07-13 19:33:22,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:33:22,490 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:33:22,490 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:33:22,691 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2109,330 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:33:22,691 INFO L430 AbstractCegarLoop]: === Iteration 340 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:33:22,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:33:22,691 INFO L82 PathProgramCache]: Analyzing trace with hash 1235076800, now seen corresponding path program 326 times [2021-07-13 19:33:22,691 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:33:22,691 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336629088] [2021-07-13 19:33:22,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:33:22,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:33:22,769 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:33:22,769 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:33:22,769 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336629088] [2021-07-13 19:33:22,769 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336629088] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:33:22,769 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [333645466] [2021-07-13 19:33:22,769 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 331 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 331 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:33:22,800 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:33:22,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:33:22,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 19:33:22,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:33:22,924 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:33:22,924 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:33:22,925 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:33:22,925 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:33:22,927 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:33:22,927 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:33:22,928 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:33:22,945 INFO L628 ElimStorePlain]: treesize reduction 30, result has 33.3 percent of original size [2021-07-13 19:33:22,945 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:33:22,945 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:33:22,945 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:59, output treesize:15 [2021-07-13 19:33:22,968 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:33:22,968 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [333645466] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:33:22,968 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:33:22,968 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-13 19:33:22,968 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707437074] [2021-07-13 19:33:22,968 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:33:22,968 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:33:22,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:33:22,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:33:22,969 INFO L87 Difference]: Start difference. First operand 865 states and 2413 transitions. Second operand has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:33:23,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:33:23,177 INFO L93 Difference]: Finished difference Result 982 states and 2610 transitions. [2021-07-13 19:33:23,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:33:23,178 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:33:23,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:33:23,179 INFO L225 Difference]: With dead ends: 982 [2021-07-13 19:33:23,179 INFO L226 Difference]: Without dead ends: 982 [2021-07-13 19:33:23,179 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 187.1ms TimeCoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:33:23,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 982 states. [2021-07-13 19:33:23,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 982 to 819. [2021-07-13 19:33:23,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 819 states, 818 states have (on average 2.7689486552567235) internal successors, (2265), 818 states have internal predecessors, (2265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:33:23,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 819 states to 819 states and 2265 transitions. [2021-07-13 19:33:23,188 INFO L78 Accepts]: Start accepts. Automaton has 819 states and 2265 transitions. Word has length 17 [2021-07-13 19:33:23,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:33:23,189 INFO L482 AbstractCegarLoop]: Abstraction has 819 states and 2265 transitions. [2021-07-13 19:33:23,189 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:33:23,189 INFO L276 IsEmpty]: Start isEmpty. Operand 819 states and 2265 transitions. [2021-07-13 19:33:23,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:33:23,190 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:33:23,190 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:33:23,390 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 331 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2111 [2021-07-13 19:33:23,390 INFO L430 AbstractCegarLoop]: === Iteration 341 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:33:23,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:33:23,390 INFO L82 PathProgramCache]: Analyzing trace with hash 1502419942, now seen corresponding path program 327 times [2021-07-13 19:33:23,390 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:33:23,390 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488407762] [2021-07-13 19:33:23,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:33:23,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:33:23,951 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:33:23,951 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:33:23,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488407762] [2021-07-13 19:33:23,951 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [488407762] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:33:23,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [199983288] [2021-07-13 19:33:23,951 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 332 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 332 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:33:23,980 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:33:23,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:33:23,981 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 53 conjunts are in the unsatisfiable core [2021-07-13 19:33:23,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:33:24,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:33:24,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:33:24,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:33:24,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:33:24,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:33:24,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:33:24,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:33:24,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:33:24,771 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:33:24,777 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:33:24,777 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 40 [2021-07-13 19:33:24,779 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:33:24,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:33:24,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:33:24,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:33:24,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:33:24,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:33:24,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:33:24,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:33:24,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:33:24,787 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:33:24,788 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 32 [2021-07-13 19:33:24,789 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:33:24,833 INFO L628 ElimStorePlain]: treesize reduction 91, result has 47.4 percent of original size [2021-07-13 19:33:24,833 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:33:24,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:33:24,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:33:24,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:33:24,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:33:24,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:33:24,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:33:24,839 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:33:24,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:33:24,840 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 42 [2021-07-13 19:33:24,841 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:33:24,851 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:33:24,853 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:33:24,853 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-13 19:33:24,854 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-13 19:33:24,863 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:33:24,864 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:33:24,864 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:257, output treesize:22 [2021-07-13 19:33:24,903 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:33:24,903 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [199983288] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:33:24,903 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:33:24,903 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-07-13 19:33:24,903 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561764229] [2021-07-13 19:33:24,903 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 19:33:24,904 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:33:24,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 19:33:24,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=458, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:33:24,904 INFO L87 Difference]: Start difference. First operand 819 states and 2265 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:33:25,500 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 83 [2021-07-13 19:33:25,741 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 92 [2021-07-13 19:33:25,931 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 86 [2021-07-13 19:33:26,244 WARN L205 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 145 DAG size of output: 96 [2021-07-13 19:33:26,442 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 86 [2021-07-13 19:33:26,751 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 95 [2021-07-13 19:33:26,936 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 86 [2021-07-13 19:33:27,244 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 101 [2021-07-13 19:33:27,558 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 74 [2021-07-13 19:33:27,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:33:27,781 INFO L93 Difference]: Finished difference Result 1360 states and 3680 transitions. [2021-07-13 19:33:27,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 19:33:27,781 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:33:27,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:33:27,783 INFO L225 Difference]: With dead ends: 1360 [2021-07-13 19:33:27,783 INFO L226 Difference]: Without dead ends: 1354 [2021-07-13 19:33:27,783 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 9 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 3332.5ms TimeCoverageRelationStatistics Valid=156, Invalid=1176, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 19:33:27,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1354 states. [2021-07-13 19:33:27,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1354 to 831. [2021-07-13 19:33:27,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 831 states, 830 states have (on average 2.763855421686747) internal successors, (2294), 830 states have internal predecessors, (2294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:33:27,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 831 states to 831 states and 2294 transitions. [2021-07-13 19:33:27,793 INFO L78 Accepts]: Start accepts. Automaton has 831 states and 2294 transitions. Word has length 18 [2021-07-13 19:33:27,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:33:27,793 INFO L482 AbstractCegarLoop]: Abstraction has 831 states and 2294 transitions. [2021-07-13 19:33:27,793 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:33:27,793 INFO L276 IsEmpty]: Start isEmpty. Operand 831 states and 2294 transitions. [2021-07-13 19:33:27,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:33:27,794 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:33:27,794 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:33:27,995 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 332 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2113 [2021-07-13 19:33:27,995 INFO L430 AbstractCegarLoop]: === Iteration 342 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:33:27,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:33:27,995 INFO L82 PathProgramCache]: Analyzing trace with hash 734866218, now seen corresponding path program 328 times [2021-07-13 19:33:27,995 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:33:27,995 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624020337] [2021-07-13 19:33:27,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:33:28,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:33:28,499 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:33:28,500 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:33:28,500 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624020337] [2021-07-13 19:33:28,500 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [624020337] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:33:28,500 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1456008312] [2021-07-13 19:33:28,500 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 333 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 333 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:33:28,528 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:33:28,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:33:28,529 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 53 conjunts are in the unsatisfiable core [2021-07-13 19:33:28,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:33:29,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:33:29,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:33:29,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:33:29,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:33:29,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:33:29,135 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:33:29,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:33:29,141 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:33:29,142 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 38 [2021-07-13 19:33:29,143 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:33:29,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:33:29,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:33:29,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:33:29,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:33:29,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:33:29,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:33:29,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:33:29,151 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:33:29,156 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:33:29,157 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 40 [2021-07-13 19:33:29,158 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:33:29,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:33:29,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:33:29,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:33:29,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:33:29,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:33:29,164 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:33:29,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:33:29,165 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 38 [2021-07-13 19:33:29,166 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:33:29,177 INFO L628 ElimStorePlain]: treesize reduction 62, result has 15.1 percent of original size [2021-07-13 19:33:29,177 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:33:29,178 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:33:29,178 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:194, output treesize:11 [2021-07-13 19:33:29,209 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:33:29,209 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1456008312] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:33:29,209 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:33:29,209 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-07-13 19:33:29,209 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265337810] [2021-07-13 19:33:29,209 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 19:33:29,209 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:33:29,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 19:33:29,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=456, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:33:29,210 INFO L87 Difference]: Start difference. First operand 831 states and 2294 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:33:31,268 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 57 [2021-07-13 19:33:31,642 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 65 [2021-07-13 19:33:31,859 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 72 [2021-07-13 19:33:32,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:33:32,198 INFO L93 Difference]: Finished difference Result 1148 states and 3019 transitions. [2021-07-13 19:33:32,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-07-13 19:33:32,198 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:33:32,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:33:32,200 INFO L225 Difference]: With dead ends: 1148 [2021-07-13 19:33:32,200 INFO L226 Difference]: Without dead ends: 1139 [2021-07-13 19:33:32,200 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 477 ImplicationChecksByTransitivity, 3259.2ms TimeCoverageRelationStatistics Valid=221, Invalid=2229, Unknown=0, NotChecked=0, Total=2450 [2021-07-13 19:33:32,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1139 states. [2021-07-13 19:33:32,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1139 to 816. [2021-07-13 19:33:32,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 816 states, 815 states have (on average 2.7607361963190185) internal successors, (2250), 815 states have internal predecessors, (2250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:33:32,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 816 states to 816 states and 2250 transitions. [2021-07-13 19:33:32,210 INFO L78 Accepts]: Start accepts. Automaton has 816 states and 2250 transitions. Word has length 18 [2021-07-13 19:33:32,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:33:32,210 INFO L482 AbstractCegarLoop]: Abstraction has 816 states and 2250 transitions. [2021-07-13 19:33:32,210 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:33:32,210 INFO L276 IsEmpty]: Start isEmpty. Operand 816 states and 2250 transitions. [2021-07-13 19:33:32,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:33:32,211 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:33:32,211 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:33:32,411 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 333 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2133 [2021-07-13 19:33:32,412 INFO L430 AbstractCegarLoop]: === Iteration 343 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:33:32,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:33:32,412 INFO L82 PathProgramCache]: Analyzing trace with hash 742596616, now seen corresponding path program 329 times [2021-07-13 19:33:32,412 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:33:32,412 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597407913] [2021-07-13 19:33:32,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:33:32,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:33:32,881 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:33:32,881 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:33:32,882 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597407913] [2021-07-13 19:33:32,882 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1597407913] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:33:32,882 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2084595448] [2021-07-13 19:33:32,882 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 334 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 334 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:33:32,910 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:33:32,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:33:32,911 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 53 conjunts are in the unsatisfiable core [2021-07-13 19:33:32,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:33:33,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:33:33,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:33:33,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:33:33,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:33:33,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:33:33,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:33:33,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:33:33,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:33:33,603 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:33:33,609 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:33:33,609 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 40 [2021-07-13 19:33:33,611 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:33:33,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:33:33,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:33:33,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:33:33,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:33:33,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:33:33,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:33:33,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:33:33,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:33:33,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:33:33,620 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:33:33,620 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 42 [2021-07-13 19:33:33,622 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:33:33,634 INFO L628 ElimStorePlain]: treesize reduction 110, result has 9.1 percent of original size [2021-07-13 19:33:33,635 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:33:33,635 INFO L518 ElimStorePlain]: Eliminatee v_prenex_156 vanished before elimination [2021-07-13 19:33:33,635 INFO L518 ElimStorePlain]: Eliminatee v_prenex_157 vanished before elimination [2021-07-13 19:33:33,635 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:33:33,635 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 6 variables, input treesize:206, output treesize:11 [2021-07-13 19:33:33,670 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:33:33,670 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2084595448] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:33:33,670 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:33:33,670 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-07-13 19:33:33,670 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996405533] [2021-07-13 19:33:33,670 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 19:33:33,670 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:33:33,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 19:33:33,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=452, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:33:33,671 INFO L87 Difference]: Start difference. First operand 816 states and 2250 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:33:34,331 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2021-07-13 19:33:34,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:33:34,576 INFO L93 Difference]: Finished difference Result 1003 states and 2681 transitions. [2021-07-13 19:33:34,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:33:34,576 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:33:34,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:33:34,578 INFO L225 Difference]: With dead ends: 1003 [2021-07-13 19:33:34,578 INFO L226 Difference]: Without dead ends: 999 [2021-07-13 19:33:34,578 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 1552.8ms TimeCoverageRelationStatistics Valid=93, Invalid=719, Unknown=0, NotChecked=0, Total=812 [2021-07-13 19:33:34,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 999 states. [2021-07-13 19:33:34,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 999 to 816. [2021-07-13 19:33:34,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 816 states, 815 states have (on average 2.7607361963190185) internal successors, (2250), 815 states have internal predecessors, (2250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:33:34,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 816 states to 816 states and 2250 transitions. [2021-07-13 19:33:34,587 INFO L78 Accepts]: Start accepts. Automaton has 816 states and 2250 transitions. Word has length 18 [2021-07-13 19:33:34,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:33:34,587 INFO L482 AbstractCegarLoop]: Abstraction has 816 states and 2250 transitions. [2021-07-13 19:33:34,587 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:33:34,587 INFO L276 IsEmpty]: Start isEmpty. Operand 816 states and 2250 transitions. [2021-07-13 19:33:34,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:33:34,588 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:33:34,588 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:33:34,796 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 334 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2156 [2021-07-13 19:33:34,796 INFO L430 AbstractCegarLoop]: === Iteration 344 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:33:34,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:33:34,796 INFO L82 PathProgramCache]: Analyzing trace with hash -746808380, now seen corresponding path program 330 times [2021-07-13 19:33:34,796 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:33:34,796 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840504429] [2021-07-13 19:33:34,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:33:34,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:33:35,153 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:33:35,153 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:33:35,153 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840504429] [2021-07-13 19:33:35,153 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [840504429] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:33:35,153 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1220640701] [2021-07-13 19:33:35,154 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 335 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 335 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:33:35,182 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:33:35,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:33:35,184 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 53 conjunts are in the unsatisfiable core [2021-07-13 19:33:35,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:33:35,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:33:35,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:33:35,782 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:33:35,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:33:35,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:33:35,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:33:35,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:33:35,788 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:33:35,791 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 42 [2021-07-13 19:33:35,793 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:33:35,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:33:35,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:33:35,798 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:33:35,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:33:35,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:33:35,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:33:35,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:33:35,802 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 40 [2021-07-13 19:33:35,804 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:33:35,816 INFO L628 ElimStorePlain]: treesize reduction 116, result has 8.7 percent of original size [2021-07-13 19:33:35,816 INFO L518 ElimStorePlain]: Eliminatee v_prenex_160 vanished before elimination [2021-07-13 19:33:35,816 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:33:35,816 INFO L518 ElimStorePlain]: Eliminatee v_prenex_159 vanished before elimination [2021-07-13 19:33:35,817 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:33:35,817 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 6 variables, input treesize:206, output treesize:11 [2021-07-13 19:33:35,862 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:33:35,862 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1220640701] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:33:35,862 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:33:35,862 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-07-13 19:33:35,862 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286574761] [2021-07-13 19:33:35,863 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 19:33:35,863 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:33:35,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 19:33:35,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=417, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:33:35,863 INFO L87 Difference]: Start difference. First operand 816 states and 2250 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:33:37,483 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 61 [2021-07-13 19:33:37,692 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 80 [2021-07-13 19:33:38,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:33:38,062 INFO L93 Difference]: Finished difference Result 1084 states and 2849 transitions. [2021-07-13 19:33:38,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-13 19:33:38,062 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:33:38,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:33:38,064 INFO L225 Difference]: With dead ends: 1084 [2021-07-13 19:33:38,064 INFO L226 Difference]: Without dead ends: 1070 [2021-07-13 19:33:38,064 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 2347.4ms TimeCoverageRelationStatistics Valid=164, Invalid=1476, Unknown=0, NotChecked=0, Total=1640 [2021-07-13 19:33:38,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1070 states. [2021-07-13 19:33:38,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1070 to 832. [2021-07-13 19:33:38,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 832 states, 831 states have (on average 2.766546329723225) internal successors, (2299), 831 states have internal predecessors, (2299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:33:38,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 832 states to 832 states and 2299 transitions. [2021-07-13 19:33:38,073 INFO L78 Accepts]: Start accepts. Automaton has 832 states and 2299 transitions. Word has length 18 [2021-07-13 19:33:38,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:33:38,074 INFO L482 AbstractCegarLoop]: Abstraction has 832 states and 2299 transitions. [2021-07-13 19:33:38,074 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:33:38,074 INFO L276 IsEmpty]: Start isEmpty. Operand 832 states and 2299 transitions. [2021-07-13 19:33:38,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:33:38,075 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:33:38,075 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:33:38,275 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2174,335 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:33:38,275 INFO L430 AbstractCegarLoop]: === Iteration 345 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:33:38,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:33:38,275 INFO L82 PathProgramCache]: Analyzing trace with hash 326277000, now seen corresponding path program 331 times [2021-07-13 19:33:38,275 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:33:38,275 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062398851] [2021-07-13 19:33:38,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:33:38,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:33:38,893 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:33:38,894 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:33:38,894 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062398851] [2021-07-13 19:33:38,894 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1062398851] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:33:38,894 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1189830890] [2021-07-13 19:33:38,894 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 336 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 336 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:33:38,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:33:38,922 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 53 conjunts are in the unsatisfiable core [2021-07-13 19:33:38,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:33:39,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:33:39,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:33:39,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:33:39,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:33:39,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:33:39,588 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:33:39,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:33:39,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:33:39,593 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:33:39,594 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 42 [2021-07-13 19:33:39,596 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:33:39,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:33:39,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:33:39,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:33:39,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:33:39,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:33:39,602 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:33:39,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:33:39,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:33:39,603 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 40 [2021-07-13 19:33:39,607 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:33:39,619 INFO L628 ElimStorePlain]: treesize reduction 116, result has 8.7 percent of original size [2021-07-13 19:33:39,619 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:33:39,619 INFO L518 ElimStorePlain]: Eliminatee v_prenex_166 vanished before elimination [2021-07-13 19:33:39,619 INFO L518 ElimStorePlain]: Eliminatee v_prenex_167 vanished before elimination [2021-07-13 19:33:39,620 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:33:39,620 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 6 variables, input treesize:206, output treesize:11 [2021-07-13 19:33:39,656 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:33:39,656 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1189830890] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:33:39,656 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:33:39,656 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-07-13 19:33:39,656 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128330493] [2021-07-13 19:33:39,657 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 19:33:39,657 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:33:39,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 19:33:39,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=458, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:33:39,657 INFO L87 Difference]: Start difference. First operand 832 states and 2299 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:33:40,115 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 63 [2021-07-13 19:33:40,647 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 74 [2021-07-13 19:33:41,005 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 98 [2021-07-13 19:33:41,313 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 95 [2021-07-13 19:33:41,966 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 43 [2021-07-13 19:33:41,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:33:41,982 INFO L93 Difference]: Finished difference Result 1046 states and 2780 transitions. [2021-07-13 19:33:41,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 19:33:41,983 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:33:41,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:33:41,984 INFO L225 Difference]: With dead ends: 1046 [2021-07-13 19:33:41,984 INFO L226 Difference]: Without dead ends: 1038 [2021-07-13 19:33:41,984 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 2818.7ms TimeCoverageRelationStatistics Valid=132, Invalid=1350, Unknown=0, NotChecked=0, Total=1482 [2021-07-13 19:33:41,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1038 states. [2021-07-13 19:33:41,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1038 to 836. [2021-07-13 19:33:41,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 836 states, 835 states have (on average 2.7676646706586827) internal successors, (2311), 835 states have internal predecessors, (2311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:33:41,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 836 states to 836 states and 2311 transitions. [2021-07-13 19:33:41,993 INFO L78 Accepts]: Start accepts. Automaton has 836 states and 2311 transitions. Word has length 18 [2021-07-13 19:33:41,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:33:41,994 INFO L482 AbstractCegarLoop]: Abstraction has 836 states and 2311 transitions. [2021-07-13 19:33:41,994 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:33:41,994 INFO L276 IsEmpty]: Start isEmpty. Operand 836 states and 2311 transitions. [2021-07-13 19:33:41,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:33:41,995 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:33:41,995 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:33:42,195 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2194,336 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:33:42,195 INFO L430 AbstractCegarLoop]: === Iteration 346 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:33:42,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:33:42,195 INFO L82 PathProgramCache]: Analyzing trace with hash -767814588, now seen corresponding path program 332 times [2021-07-13 19:33:42,195 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:33:42,195 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399598029] [2021-07-13 19:33:42,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:33:42,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:33:42,776 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:33:42,776 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:33:42,776 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399598029] [2021-07-13 19:33:42,776 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [399598029] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:33:42,776 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1225818567] [2021-07-13 19:33:42,776 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 337 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 337 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:33:42,803 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:33:42,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:33:42,804 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 57 conjunts are in the unsatisfiable core [2021-07-13 19:33:42,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:33:43,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:33:43,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:33:43,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:33:43,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:33:43,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:33:43,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:33:43,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:33:43,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:33:43,394 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:33:43,399 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:33:43,399 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 48 [2021-07-13 19:33:43,401 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:33:43,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:33:43,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:33:43,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:33:43,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:33:43,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:33:43,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:33:43,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:33:43,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:33:43,409 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:33:43,414 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:33:43,415 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 32 [2021-07-13 19:33:43,416 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:33:43,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:33:43,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:33:43,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:33:43,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:33:43,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:33:43,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:33:43,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:33:43,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:33:43,425 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:33:43,431 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:33:43,431 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 40 [2021-07-13 19:33:43,433 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:33:43,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:33:43,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:33:43,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:33:43,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:33:43,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:33:43,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:33:43,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:33:43,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:33:43,441 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:33:43,441 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 40 [2021-07-13 19:33:43,443 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:33:43,498 INFO L628 ElimStorePlain]: treesize reduction 99, result has 40.4 percent of original size [2021-07-13 19:33:43,500 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:33:43,501 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-13 19:33:43,502 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-13 19:33:43,524 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:33:43,525 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:33:43,525 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 2 variables, input treesize:333, output treesize:62 [2021-07-13 19:33:43,622 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:33:43,622 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1225818567] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:33:43,622 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:33:43,622 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-07-13 19:33:43,622 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915908005] [2021-07-13 19:33:43,622 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-13 19:33:43,622 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:33:43,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-13 19:33:43,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=488, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:33:43,623 INFO L87 Difference]: Start difference. First operand 836 states and 2311 transitions. Second operand has 24 states, 24 states have (on average 1.3333333333333333) internal successors, (32), 24 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:33:44,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:33:44,352 INFO L93 Difference]: Finished difference Result 1077 states and 2845 transitions. [2021-07-13 19:33:44,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 19:33:44,352 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.3333333333333333) internal successors, (32), 24 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:33:44,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:33:44,354 INFO L225 Difference]: With dead ends: 1077 [2021-07-13 19:33:44,354 INFO L226 Difference]: Without dead ends: 1071 [2021-07-13 19:33:44,354 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 1351.6ms TimeCoverageRelationStatistics Valid=92, Invalid=664, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:33:44,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1071 states. [2021-07-13 19:33:44,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1071 to 856. [2021-07-13 19:33:44,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 856 states, 855 states have (on average 2.76140350877193) internal successors, (2361), 855 states have internal predecessors, (2361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:33:44,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 856 states to 856 states and 2361 transitions. [2021-07-13 19:33:44,363 INFO L78 Accepts]: Start accepts. Automaton has 856 states and 2361 transitions. Word has length 18 [2021-07-13 19:33:44,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:33:44,363 INFO L482 AbstractCegarLoop]: Abstraction has 856 states and 2361 transitions. [2021-07-13 19:33:44,363 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.3333333333333333) internal successors, (32), 24 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:33:44,363 INFO L276 IsEmpty]: Start isEmpty. Operand 856 states and 2361 transitions. [2021-07-13 19:33:44,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:33:44,364 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:33:44,364 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:33:44,565 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 337 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2212 [2021-07-13 19:33:44,565 INFO L430 AbstractCegarLoop]: === Iteration 347 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:33:44,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:33:44,565 INFO L82 PathProgramCache]: Analyzing trace with hash -349154778, now seen corresponding path program 333 times [2021-07-13 19:33:44,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:33:44,565 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223550732] [2021-07-13 19:33:44,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:33:44,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:33:45,075 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:33:45,076 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:33:45,076 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223550732] [2021-07-13 19:33:45,076 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1223550732] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:33:45,076 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2113023239] [2021-07-13 19:33:45,076 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 338 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 338 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:33:45,105 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-13 19:33:45,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:33:45,106 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 57 conjunts are in the unsatisfiable core [2021-07-13 19:33:45,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:33:45,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:33:45,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:33:45,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:33:45,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:33:45,620 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:33:45,624 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:33:45,624 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 36 [2021-07-13 19:33:45,626 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:33:45,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:33:45,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:33:45,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:33:45,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:33:45,632 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:33:45,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:33:45,636 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:33:45,637 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 36 [2021-07-13 19:33:45,639 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:33:45,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:33:45,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:33:45,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:33:45,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:33:45,644 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:33:45,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:33:45,648 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:33:45,650 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 44 [2021-07-13 19:33:45,652 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:33:45,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:33:45,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:33:45,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:33:45,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:33:45,658 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:33:45,659 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 28 [2021-07-13 19:33:45,660 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:33:45,716 INFO L628 ElimStorePlain]: treesize reduction 93, result has 44.0 percent of original size [2021-07-13 19:33:45,719 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:33:45,719 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-13 19:33:45,720 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:33:45,742 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:33:45,743 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:33:45,743 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 2 variables, input treesize:301, output treesize:62 [2021-07-13 19:33:45,837 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:33:45,837 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2113023239] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:33:45,837 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:33:45,837 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-07-13 19:33:45,837 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985522806] [2021-07-13 19:33:45,837 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 19:33:45,837 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:33:45,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 19:33:45,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=439, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:33:45,838 INFO L87 Difference]: Start difference. First operand 856 states and 2361 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:33:46,370 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 61 [2021-07-13 19:33:46,638 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 69 [2021-07-13 19:33:47,042 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 74 [2021-07-13 19:33:47,450 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 75 [2021-07-13 19:33:47,819 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 79 [2021-07-13 19:33:48,120 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 58 [2021-07-13 19:33:48,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:33:48,259 INFO L93 Difference]: Finished difference Result 1046 states and 2755 transitions. [2021-07-13 19:33:48,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-07-13 19:33:48,260 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:33:48,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:33:48,261 INFO L225 Difference]: With dead ends: 1046 [2021-07-13 19:33:48,262 INFO L226 Difference]: Without dead ends: 1034 [2021-07-13 19:33:48,262 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 390 ImplicationChecksByTransitivity, 2883.2ms TimeCoverageRelationStatistics Valid=202, Invalid=1604, Unknown=0, NotChecked=0, Total=1806 [2021-07-13 19:33:48,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1034 states. [2021-07-13 19:33:48,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1034 to 882. [2021-07-13 19:33:48,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 882 states, 881 states have (on average 2.7763904653802496) internal successors, (2446), 881 states have internal predecessors, (2446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:33:48,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 882 states to 882 states and 2446 transitions. [2021-07-13 19:33:48,272 INFO L78 Accepts]: Start accepts. Automaton has 882 states and 2446 transitions. Word has length 18 [2021-07-13 19:33:48,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:33:48,272 INFO L482 AbstractCegarLoop]: Abstraction has 882 states and 2446 transitions. [2021-07-13 19:33:48,272 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:33:48,272 INFO L276 IsEmpty]: Start isEmpty. Operand 882 states and 2446 transitions. [2021-07-13 19:33:48,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:33:48,273 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:33:48,273 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:33:48,473 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 338 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2222 [2021-07-13 19:33:48,473 INFO L430 AbstractCegarLoop]: === Iteration 348 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:33:48,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:33:48,474 INFO L82 PathProgramCache]: Analyzing trace with hash -101782042, now seen corresponding path program 334 times [2021-07-13 19:33:48,474 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:33:48,474 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313247366] [2021-07-13 19:33:48,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:33:48,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:33:48,649 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:33:48,649 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:33:48,649 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313247366] [2021-07-13 19:33:48,650 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1313247366] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:33:48,650 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1844901384] [2021-07-13 19:33:48,650 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 339 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 339 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:33:48,676 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:33:48,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:33:48,677 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 53 conjunts are in the unsatisfiable core [2021-07-13 19:33:48,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:33:49,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:33:49,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:33:49,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:33:49,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:33:49,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:33:49,323 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:33:49,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:33:49,324 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 38 [2021-07-13 19:33:49,325 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:33:49,343 INFO L628 ElimStorePlain]: treesize reduction 143, result has 7.1 percent of original size [2021-07-13 19:33:49,343 INFO L518 ElimStorePlain]: Eliminatee array_0 vanished before elimination [2021-07-13 19:33:49,343 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:33:49,343 INFO L518 ElimStorePlain]: Eliminatee v_prenex_169 vanished before elimination [2021-07-13 19:33:49,343 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:33:49,343 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:194, output treesize:11 [2021-07-13 19:33:49,370 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:33:49,370 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1844901384] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:33:49,370 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:33:49,370 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 20 [2021-07-13 19:33:49,370 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290935189] [2021-07-13 19:33:49,370 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 19:33:49,370 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:33:49,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 19:33:49,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=330, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:33:49,371 INFO L87 Difference]: Start difference. First operand 882 states and 2446 transitions. Second operand has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:33:50,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:33:50,630 INFO L93 Difference]: Finished difference Result 1043 states and 2788 transitions. [2021-07-13 19:33:50,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 19:33:50,630 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:33:50,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:33:50,632 INFO L225 Difference]: With dead ends: 1043 [2021-07-13 19:33:50,632 INFO L226 Difference]: Without dead ends: 1039 [2021-07-13 19:33:50,632 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 1553.8ms TimeCoverageRelationStatistics Valid=154, Invalid=1106, Unknown=0, NotChecked=0, Total=1260 [2021-07-13 19:33:50,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1039 states. [2021-07-13 19:33:50,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1039 to 917. [2021-07-13 19:33:50,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 917 states, 916 states have (on average 2.7903930131004366) internal successors, (2556), 916 states have internal predecessors, (2556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:33:50,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 917 states to 917 states and 2556 transitions. [2021-07-13 19:33:50,642 INFO L78 Accepts]: Start accepts. Automaton has 917 states and 2556 transitions. Word has length 18 [2021-07-13 19:33:50,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:33:50,642 INFO L482 AbstractCegarLoop]: Abstraction has 917 states and 2556 transitions. [2021-07-13 19:33:50,642 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:33:50,643 INFO L276 IsEmpty]: Start isEmpty. Operand 917 states and 2556 transitions. [2021-07-13 19:33:50,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:33:50,643 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:33:50,644 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:33:50,844 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 339 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2233 [2021-07-13 19:33:50,844 INFO L430 AbstractCegarLoop]: === Iteration 349 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:33:50,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:33:50,844 INFO L82 PathProgramCache]: Analyzing trace with hash -518101658, now seen corresponding path program 335 times [2021-07-13 19:33:50,844 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:33:50,844 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253837199] [2021-07-13 19:33:50,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:33:50,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:33:51,138 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:33:51,138 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:33:51,138 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253837199] [2021-07-13 19:33:51,138 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [253837199] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:33:51,138 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1010826392] [2021-07-13 19:33:51,138 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 340 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 340 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:33:51,167 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:33:51,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:33:51,168 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 53 conjunts are in the unsatisfiable core [2021-07-13 19:33:51,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:33:51,526 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 48 [2021-07-13 19:33:51,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:33:51,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:33:51,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:33:51,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:33:51,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:33:51,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:33:51,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:33:51,853 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:33:51,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:33:51,859 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:33:51,860 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 42 [2021-07-13 19:33:51,861 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:33:51,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:33:51,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:33:51,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:33:51,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:33:51,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:33:51,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:33:51,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:33:51,869 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:33:51,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:33:51,870 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 40 [2021-07-13 19:33:51,872 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:33:51,922 INFO L628 ElimStorePlain]: treesize reduction 91, result has 45.8 percent of original size [2021-07-13 19:33:51,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:33:51,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:33:51,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:33:51,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:33:51,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:33:51,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:33:51,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 27 [2021-07-13 19:33:51,929 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:33:51,939 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:33:51,939 INFO L518 ElimStorePlain]: Eliminatee v_prenex_173 vanished before elimination [2021-07-13 19:33:51,941 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:33:51,941 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-13 19:33:51,943 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-13 19:33:51,952 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:33:51,953 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:33:51,953 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:257, output treesize:22 [2021-07-13 19:33:51,991 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:33:51,991 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1010826392] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:33:51,991 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:33:51,991 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 20 [2021-07-13 19:33:51,991 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854591158] [2021-07-13 19:33:51,991 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 19:33:51,991 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:33:51,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 19:33:51,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=338, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:33:51,992 INFO L87 Difference]: Start difference. First operand 917 states and 2556 transitions. Second operand has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:33:53,525 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 64 [2021-07-13 19:33:53,684 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 82 [2021-07-13 19:33:53,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:33:53,818 INFO L93 Difference]: Finished difference Result 1092 states and 2931 transitions. [2021-07-13 19:33:53,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 19:33:53,819 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:33:53,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:33:53,820 INFO L225 Difference]: With dead ends: 1092 [2021-07-13 19:33:53,820 INFO L226 Difference]: Without dead ends: 1072 [2021-07-13 19:33:53,820 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 2160.1ms TimeCoverageRelationStatistics Valid=144, Invalid=1116, Unknown=0, NotChecked=0, Total=1260 [2021-07-13 19:33:53,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1072 states. [2021-07-13 19:33:53,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1072 to 946. [2021-07-13 19:33:53,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 946 states, 945 states have (on average 2.785185185185185) internal successors, (2632), 945 states have internal predecessors, (2632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:33:53,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 946 states to 946 states and 2632 transitions. [2021-07-13 19:33:53,830 INFO L78 Accepts]: Start accepts. Automaton has 946 states and 2632 transitions. Word has length 18 [2021-07-13 19:33:53,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:33:53,830 INFO L482 AbstractCegarLoop]: Abstraction has 946 states and 2632 transitions. [2021-07-13 19:33:53,830 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:33:53,831 INFO L276 IsEmpty]: Start isEmpty. Operand 946 states and 2632 transitions. [2021-07-13 19:33:53,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:33:53,831 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:33:53,831 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:33:54,032 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2252,340 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:33:54,032 INFO L430 AbstractCegarLoop]: === Iteration 350 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:33:54,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:33:54,032 INFO L82 PathProgramCache]: Analyzing trace with hash -539107866, now seen corresponding path program 336 times [2021-07-13 19:33:54,032 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:33:54,032 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947465595] [2021-07-13 19:33:54,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:33:54,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:33:54,383 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:33:54,383 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:33:54,383 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947465595] [2021-07-13 19:33:54,383 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1947465595] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:33:54,384 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [629141441] [2021-07-13 19:33:54,384 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 341 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 341 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:33:54,418 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:33:54,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:33:54,419 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 53 conjunts are in the unsatisfiable core [2021-07-13 19:33:54,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:33:55,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:33:55,042 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:33:55,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:33:55,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:33:55,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:33:55,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:33:55,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:33:55,046 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 40 [2021-07-13 19:33:55,047 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:33:55,066 INFO L628 ElimStorePlain]: treesize reduction 151, result has 6.8 percent of original size [2021-07-13 19:33:55,067 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:33:55,067 INFO L518 ElimStorePlain]: Eliminatee v_prenex_177 vanished before elimination [2021-07-13 19:33:55,067 INFO L518 ElimStorePlain]: Eliminatee v_prenex_178 vanished before elimination [2021-07-13 19:33:55,067 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:33:55,067 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:206, output treesize:11 [2021-07-13 19:33:55,100 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:33:55,101 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [629141441] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:33:55,101 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:33:55,101 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-07-13 19:33:55,101 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036124581] [2021-07-13 19:33:55,101 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 19:33:55,101 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:33:55,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 19:33:55,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=416, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:33:55,101 INFO L87 Difference]: Start difference. First operand 946 states and 2632 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:33:56,404 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 84 [2021-07-13 19:33:56,595 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 88 [2021-07-13 19:33:56,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:33:56,697 INFO L93 Difference]: Finished difference Result 1041 states and 2835 transitions. [2021-07-13 19:33:56,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 19:33:56,697 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:33:56,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:33:56,698 INFO L225 Difference]: With dead ends: 1041 [2021-07-13 19:33:56,698 INFO L226 Difference]: Without dead ends: 1037 [2021-07-13 19:33:56,699 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 1904.6ms TimeCoverageRelationStatistics Valid=127, Invalid=1133, Unknown=0, NotChecked=0, Total=1260 [2021-07-13 19:33:56,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1037 states. [2021-07-13 19:33:56,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1037 to 946. [2021-07-13 19:33:56,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 946 states, 945 states have (on average 2.785185185185185) internal successors, (2632), 945 states have internal predecessors, (2632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:33:56,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 946 states to 946 states and 2632 transitions. [2021-07-13 19:33:56,708 INFO L78 Accepts]: Start accepts. Automaton has 946 states and 2632 transitions. Word has length 18 [2021-07-13 19:33:56,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:33:56,709 INFO L482 AbstractCegarLoop]: Abstraction has 946 states and 2632 transitions. [2021-07-13 19:33:56,709 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:33:56,709 INFO L276 IsEmpty]: Start isEmpty. Operand 946 states and 2632 transitions. [2021-07-13 19:33:56,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:33:56,710 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:33:56,710 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:33:56,910 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2273,341 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:33:56,910 INFO L430 AbstractCegarLoop]: === Iteration 351 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:33:56,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:33:56,910 INFO L82 PathProgramCache]: Analyzing trace with hash 312380492, now seen corresponding path program 337 times [2021-07-13 19:33:56,910 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:33:56,910 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338898771] [2021-07-13 19:33:56,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:33:56,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:33:57,348 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:33:57,348 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:33:57,348 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338898771] [2021-07-13 19:33:57,348 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1338898771] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:33:57,348 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1860501010] [2021-07-13 19:33:57,348 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 342 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 342 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:33:57,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:33:57,379 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 53 conjunts are in the unsatisfiable core [2021-07-13 19:33:57,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:33:57,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:33:57,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:33:57,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:33:57,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:33:57,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:33:57,984 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:33:57,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:33:57,989 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:33:57,990 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 38 [2021-07-13 19:33:57,992 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:33:57,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:33:57,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:33:57,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:33:57,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:33:57,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:33:57,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:33:57,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:33:57,999 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:33:58,004 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:33:58,005 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 40 [2021-07-13 19:33:58,006 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:33:58,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:33:58,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:33:58,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:33:58,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:33:58,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:33:58,012 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:33:58,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:33:58,013 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 38 [2021-07-13 19:33:58,014 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:33:58,026 INFO L628 ElimStorePlain]: treesize reduction 62, result has 15.1 percent of original size [2021-07-13 19:33:58,026 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:33:58,026 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:33:58,026 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:194, output treesize:11 [2021-07-13 19:33:58,057 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:33:58,057 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1860501010] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:33:58,057 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:33:58,057 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-07-13 19:33:58,057 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566949453] [2021-07-13 19:33:58,057 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 19:33:58,057 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:33:58,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 19:33:58,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=456, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:33:58,057 INFO L87 Difference]: Start difference. First operand 946 states and 2632 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:33:59,706 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 63 [2021-07-13 19:34:00,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:34:00,124 INFO L93 Difference]: Finished difference Result 1121 states and 2991 transitions. [2021-07-13 19:34:00,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-13 19:34:00,125 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:34:00,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:34:00,126 INFO L225 Difference]: With dead ends: 1121 [2021-07-13 19:34:00,126 INFO L226 Difference]: Without dead ends: 1115 [2021-07-13 19:34:00,126 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 2394.7ms TimeCoverageRelationStatistics Valid=165, Invalid=1557, Unknown=0, NotChecked=0, Total=1722 [2021-07-13 19:34:00,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1115 states. [2021-07-13 19:34:00,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1115 to 963. [2021-07-13 19:34:00,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 963 states, 962 states have (on average 2.7972972972972974) internal successors, (2691), 962 states have internal predecessors, (2691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:34:00,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 963 states to 963 states and 2691 transitions. [2021-07-13 19:34:00,137 INFO L78 Accepts]: Start accepts. Automaton has 963 states and 2691 transitions. Word has length 18 [2021-07-13 19:34:00,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:34:00,137 INFO L482 AbstractCegarLoop]: Abstraction has 963 states and 2691 transitions. [2021-07-13 19:34:00,137 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:34:00,137 INFO L276 IsEmpty]: Start isEmpty. Operand 963 states and 2691 transitions. [2021-07-13 19:34:00,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:34:00,138 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:34:00,138 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:34:00,338 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2292,342 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:34:00,339 INFO L430 AbstractCegarLoop]: === Iteration 352 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:34:00,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:34:00,339 INFO L82 PathProgramCache]: Analyzing trace with hash 320110890, now seen corresponding path program 338 times [2021-07-13 19:34:00,339 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:34:00,339 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120832718] [2021-07-13 19:34:00,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:34:00,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:34:00,799 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:34:00,799 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:34:00,799 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120832718] [2021-07-13 19:34:00,799 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [120832718] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:34:00,800 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [504363386] [2021-07-13 19:34:00,800 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 343 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 343 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:34:00,826 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:34:00,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:34:00,828 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 57 conjunts are in the unsatisfiable core [2021-07-13 19:34:00,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:34:01,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:01,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:01,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:01,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:01,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:01,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:01,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:01,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:01,379 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:34:01,384 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:34:01,384 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 48 [2021-07-13 19:34:01,386 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:34:01,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:01,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:01,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:01,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:01,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:01,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:01,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:01,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:01,394 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:34:01,399 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:34:01,399 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 32 [2021-07-13 19:34:01,400 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:34:01,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:01,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:01,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:01,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:01,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:01,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:01,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:01,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:01,408 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:34:01,414 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:34:01,414 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 40 [2021-07-13 19:34:01,415 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:34:01,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:01,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:01,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:01,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:01,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:01,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:01,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:01,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:01,423 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:34:01,424 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 40 [2021-07-13 19:34:01,425 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:34:01,482 INFO L628 ElimStorePlain]: treesize reduction 97, result has 42.9 percent of original size [2021-07-13 19:34:01,485 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:34:01,485 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-13 19:34:01,486 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:34:01,508 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:34:01,509 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:34:01,509 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 2 variables, input treesize:333, output treesize:62 [2021-07-13 19:34:01,603 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:34:01,603 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [504363386] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:34:01,604 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:34:01,604 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-07-13 19:34:01,604 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340419804] [2021-07-13 19:34:01,604 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-13 19:34:01,604 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:34:01,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-13 19:34:01,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=485, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:34:01,604 INFO L87 Difference]: Start difference. First operand 963 states and 2691 transitions. Second operand has 24 states, 24 states have (on average 1.3333333333333333) internal successors, (32), 24 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:34:03,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:34:03,047 INFO L93 Difference]: Finished difference Result 1135 states and 3035 transitions. [2021-07-13 19:34:03,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-13 19:34:03,047 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.3333333333333333) internal successors, (32), 24 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:34:03,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:34:03,049 INFO L225 Difference]: With dead ends: 1135 [2021-07-13 19:34:03,049 INFO L226 Difference]: Without dead ends: 1123 [2021-07-13 19:34:03,049 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 1930.8ms TimeCoverageRelationStatistics Valid=161, Invalid=1171, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 19:34:03,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1123 states. [2021-07-13 19:34:03,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1123 to 974. [2021-07-13 19:34:03,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 974 states, 973 states have (on average 2.8098663926002057) internal successors, (2734), 973 states have internal predecessors, (2734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:34:03,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 974 states to 974 states and 2734 transitions. [2021-07-13 19:34:03,060 INFO L78 Accepts]: Start accepts. Automaton has 974 states and 2734 transitions. Word has length 18 [2021-07-13 19:34:03,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:34:03,060 INFO L482 AbstractCegarLoop]: Abstraction has 974 states and 2734 transitions. [2021-07-13 19:34:03,060 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.3333333333333333) internal successors, (32), 24 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:34:03,060 INFO L276 IsEmpty]: Start isEmpty. Operand 974 states and 2734 transitions. [2021-07-13 19:34:03,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:34:03,061 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:34:03,061 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:34:03,261 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 343 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2314 [2021-07-13 19:34:03,261 INFO L430 AbstractCegarLoop]: === Iteration 353 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:34:03,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:34:03,262 INFO L82 PathProgramCache]: Analyzing trace with hash -1169294106, now seen corresponding path program 339 times [2021-07-13 19:34:03,262 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:34:03,262 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434681009] [2021-07-13 19:34:03,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:34:03,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:34:03,835 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:34:03,835 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:34:03,835 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434681009] [2021-07-13 19:34:03,835 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [434681009] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:34:03,835 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [915253339] [2021-07-13 19:34:03,835 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 344 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 344 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:34:03,864 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 19:34:03,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:34:03,865 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 57 conjunts are in the unsatisfiable core [2021-07-13 19:34:03,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:34:04,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:04,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:04,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:04,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:04,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:04,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:04,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:04,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:04,415 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:34:04,421 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:34:04,421 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 48 [2021-07-13 19:34:04,423 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:34:04,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:04,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:04,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:04,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:04,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:04,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:04,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:04,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:04,431 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:34:04,436 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:34:04,436 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 32 [2021-07-13 19:34:04,438 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:34:04,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:04,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:04,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:04,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:04,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:04,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:04,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:04,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:04,445 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:34:04,451 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:34:04,451 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 40 [2021-07-13 19:34:04,453 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:34:04,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:04,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:04,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:04,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:04,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:04,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:04,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:04,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:04,460 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:34:04,460 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 40 [2021-07-13 19:34:04,462 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:34:04,520 INFO L628 ElimStorePlain]: treesize reduction 89, result has 45.1 percent of original size [2021-07-13 19:34:04,522 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:34:04,522 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-13 19:34:04,523 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:34:04,546 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:34:04,547 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:34:04,547 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 2 variables, input treesize:333, output treesize:62 [2021-07-13 19:34:04,646 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:34:04,646 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [915253339] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:34:04,646 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:34:04,646 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-07-13 19:34:04,646 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599446783] [2021-07-13 19:34:04,646 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-13 19:34:04,646 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:34:04,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-13 19:34:04,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=487, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:34:04,647 INFO L87 Difference]: Start difference. First operand 974 states and 2734 transitions. Second operand has 24 states, 24 states have (on average 1.3333333333333333) internal successors, (32), 24 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:34:06,007 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 35 [2021-07-13 19:34:06,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:34:06,189 INFO L93 Difference]: Finished difference Result 1092 states and 2973 transitions. [2021-07-13 19:34:06,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-13 19:34:06,190 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.3333333333333333) internal successors, (32), 24 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:34:06,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:34:06,191 INFO L225 Difference]: With dead ends: 1092 [2021-07-13 19:34:06,191 INFO L226 Difference]: Without dead ends: 1084 [2021-07-13 19:34:06,191 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 2123.0ms TimeCoverageRelationStatistics Valid=147, Invalid=1185, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 19:34:06,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1084 states. [2021-07-13 19:34:06,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1084 to 977. [2021-07-13 19:34:06,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 977 states, 976 states have (on average 2.810450819672131) internal successors, (2743), 976 states have internal predecessors, (2743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:34:06,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 977 states to 977 states and 2743 transitions. [2021-07-13 19:34:06,202 INFO L78 Accepts]: Start accepts. Automaton has 977 states and 2743 transitions. Word has length 18 [2021-07-13 19:34:06,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:34:06,202 INFO L482 AbstractCegarLoop]: Abstraction has 977 states and 2743 transitions. [2021-07-13 19:34:06,202 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.3333333333333333) internal successors, (32), 24 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:34:06,202 INFO L276 IsEmpty]: Start isEmpty. Operand 977 states and 2743 transitions. [2021-07-13 19:34:06,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:34:06,203 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:34:06,203 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:34:06,403 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2325,344 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:34:06,403 INFO L430 AbstractCegarLoop]: === Iteration 354 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:34:06,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:34:06,404 INFO L82 PathProgramCache]: Analyzing trace with hash -96208726, now seen corresponding path program 340 times [2021-07-13 19:34:06,404 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:34:06,404 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743998116] [2021-07-13 19:34:06,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:34:06,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:34:06,985 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:34:06,986 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:34:06,986 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743998116] [2021-07-13 19:34:06,986 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1743998116] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:34:06,986 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1446246892] [2021-07-13 19:34:06,986 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 345 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 345 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:34:07,015 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:34:07,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:34:07,017 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 53 conjunts are in the unsatisfiable core [2021-07-13 19:34:07,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:34:07,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:07,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:07,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:07,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:07,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:07,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:07,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:07,732 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:34:07,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:07,737 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:34:07,739 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 40 [2021-07-13 19:34:07,740 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:34:07,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:07,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:07,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:07,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:07,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:07,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:07,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:07,748 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:34:07,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:07,750 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 42 [2021-07-13 19:34:07,751 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:34:07,764 INFO L628 ElimStorePlain]: treesize reduction 112, result has 8.9 percent of original size [2021-07-13 19:34:07,764 INFO L518 ElimStorePlain]: Eliminatee v_prenex_182 vanished before elimination [2021-07-13 19:34:07,764 INFO L518 ElimStorePlain]: Eliminatee v_prenex_183 vanished before elimination [2021-07-13 19:34:07,764 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:34:07,764 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:34:07,764 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 6 variables, input treesize:206, output treesize:11 [2021-07-13 19:34:07,799 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:34:07,799 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1446246892] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:34:07,799 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:34:07,799 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-07-13 19:34:07,800 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301126847] [2021-07-13 19:34:07,800 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 19:34:07,800 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:34:07,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 19:34:07,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=459, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:34:07,800 INFO L87 Difference]: Start difference. First operand 977 states and 2743 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:34:08,434 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 64 [2021-07-13 19:34:08,705 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 86 [2021-07-13 19:34:09,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:34:09,169 INFO L93 Difference]: Finished difference Result 1061 states and 2921 transitions. [2021-07-13 19:34:09,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 19:34:09,169 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:34:09,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:34:09,171 INFO L225 Difference]: With dead ends: 1061 [2021-07-13 19:34:09,171 INFO L226 Difference]: Without dead ends: 1057 [2021-07-13 19:34:09,171 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 1992.4ms TimeCoverageRelationStatistics Valid=103, Invalid=953, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 19:34:09,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1057 states. [2021-07-13 19:34:09,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1057 to 980. [2021-07-13 19:34:09,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 980 states, 979 states have (on average 2.8110316649642493) internal successors, (2752), 979 states have internal predecessors, (2752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:34:09,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 980 states to 980 states and 2752 transitions. [2021-07-13 19:34:09,181 INFO L78 Accepts]: Start accepts. Automaton has 980 states and 2752 transitions. Word has length 18 [2021-07-13 19:34:09,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:34:09,181 INFO L482 AbstractCegarLoop]: Abstraction has 980 states and 2752 transitions. [2021-07-13 19:34:09,181 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:34:09,181 INFO L276 IsEmpty]: Start isEmpty. Operand 980 states and 2752 transitions. [2021-07-13 19:34:09,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:34:09,182 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:34:09,182 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:34:09,383 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 345 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2336 [2021-07-13 19:34:09,383 INFO L430 AbstractCegarLoop]: === Iteration 355 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:34:09,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:34:09,383 INFO L82 PathProgramCache]: Analyzing trace with hash -1190300314, now seen corresponding path program 341 times [2021-07-13 19:34:09,383 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:34:09,383 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672764606] [2021-07-13 19:34:09,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:34:09,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:34:09,626 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:34:09,626 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:34:09,626 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672764606] [2021-07-13 19:34:09,626 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [672764606] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:34:09,626 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1810240157] [2021-07-13 19:34:09,626 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 346 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 346 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:34:09,655 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:34:09,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:34:09,656 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 53 conjunts are in the unsatisfiable core [2021-07-13 19:34:09,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:34:10,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:10,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:10,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:10,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:10,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:10,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:10,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:10,286 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:34:10,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:10,292 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:34:10,293 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 42 [2021-07-13 19:34:10,294 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:34:10,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:10,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:10,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:10,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:10,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:10,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:10,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:10,301 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:34:10,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:10,302 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 40 [2021-07-13 19:34:10,304 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:34:10,316 INFO L628 ElimStorePlain]: treesize reduction 106, result has 9.4 percent of original size [2021-07-13 19:34:10,317 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:34:10,317 INFO L518 ElimStorePlain]: Eliminatee v_prenex_187 vanished before elimination [2021-07-13 19:34:10,317 INFO L518 ElimStorePlain]: Eliminatee v_prenex_188 vanished before elimination [2021-07-13 19:34:10,317 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:34:10,317 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 6 variables, input treesize:206, output treesize:11 [2021-07-13 19:34:10,348 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:34:10,348 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1810240157] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:34:10,348 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:34:10,348 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-07-13 19:34:10,348 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130280287] [2021-07-13 19:34:10,349 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 19:34:10,349 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:34:10,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 19:34:10,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=413, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:34:10,349 INFO L87 Difference]: Start difference. First operand 980 states and 2752 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:34:11,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:34:11,766 INFO L93 Difference]: Finished difference Result 1109 states and 3024 transitions. [2021-07-13 19:34:11,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 19:34:11,767 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:34:11,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:34:11,768 INFO L225 Difference]: With dead ends: 1109 [2021-07-13 19:34:11,768 INFO L226 Difference]: Without dead ends: 1105 [2021-07-13 19:34:11,769 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 1593.6ms TimeCoverageRelationStatistics Valid=127, Invalid=1133, Unknown=0, NotChecked=0, Total=1260 [2021-07-13 19:34:11,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1105 states. [2021-07-13 19:34:11,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1105 to 987. [2021-07-13 19:34:11,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 987 states, 986 states have (on average 2.814401622718053) internal successors, (2775), 986 states have internal predecessors, (2775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:34:11,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 987 states to 987 states and 2775 transitions. [2021-07-13 19:34:11,779 INFO L78 Accepts]: Start accepts. Automaton has 987 states and 2775 transitions. Word has length 18 [2021-07-13 19:34:11,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:34:11,779 INFO L482 AbstractCegarLoop]: Abstraction has 987 states and 2775 transitions. [2021-07-13 19:34:11,779 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:34:11,779 INFO L276 IsEmpty]: Start isEmpty. Operand 987 states and 2775 transitions. [2021-07-13 19:34:11,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:34:11,780 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:34:11,780 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:34:11,980 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 346 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2354 [2021-07-13 19:34:11,981 INFO L430 AbstractCegarLoop]: === Iteration 356 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:34:11,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:34:11,981 INFO L82 PathProgramCache]: Analyzing trace with hash 405932714, now seen corresponding path program 342 times [2021-07-13 19:34:11,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:34:11,981 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001801072] [2021-07-13 19:34:11,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:34:11,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:34:12,519 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:34:12,519 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:34:12,519 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001801072] [2021-07-13 19:34:12,519 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2001801072] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:34:12,519 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1548629032] [2021-07-13 19:34:12,519 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 347 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 347 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:34:12,548 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:34:12,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:34:12,549 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 53 conjunts are in the unsatisfiable core [2021-07-13 19:34:12,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:34:13,154 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:34:13,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:13,157 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:34:13,159 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 34 [2021-07-13 19:34:13,161 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:34:13,164 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:34:13,166 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:34:13,168 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 34 [2021-07-13 19:34:13,170 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:34:13,172 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:34:13,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:13,174 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:34:13,177 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 36 [2021-07-13 19:34:13,178 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:34:13,181 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:34:13,181 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 26 [2021-07-13 19:34:13,183 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:34:13,197 INFO L628 ElimStorePlain]: treesize reduction 73, result has 17.0 percent of original size [2021-07-13 19:34:13,198 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:34:13,198 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:34:13,198 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:209, output treesize:11 [2021-07-13 19:34:13,231 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:34:13,231 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1548629032] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:34:13,231 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:34:13,231 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-07-13 19:34:13,231 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146721929] [2021-07-13 19:34:13,231 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 19:34:13,231 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:34:13,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 19:34:13,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=458, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:34:13,232 INFO L87 Difference]: Start difference. First operand 987 states and 2775 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:34:15,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:34:15,073 INFO L93 Difference]: Finished difference Result 1066 states and 2915 transitions. [2021-07-13 19:34:15,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-13 19:34:15,073 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:34:15,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:34:15,075 INFO L225 Difference]: With dead ends: 1066 [2021-07-13 19:34:15,075 INFO L226 Difference]: Without dead ends: 1053 [2021-07-13 19:34:15,075 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 2327.5ms TimeCoverageRelationStatistics Valid=150, Invalid=1490, Unknown=0, NotChecked=0, Total=1640 [2021-07-13 19:34:15,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1053 states. [2021-07-13 19:34:15,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1053 to 1013. [2021-07-13 19:34:15,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1013 states, 1012 states have (on average 2.8033596837944663) internal successors, (2837), 1012 states have internal predecessors, (2837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:34:15,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1013 states to 1013 states and 2837 transitions. [2021-07-13 19:34:15,085 INFO L78 Accepts]: Start accepts. Automaton has 1013 states and 2837 transitions. Word has length 18 [2021-07-13 19:34:15,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:34:15,085 INFO L482 AbstractCegarLoop]: Abstraction has 1013 states and 2837 transitions. [2021-07-13 19:34:15,085 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:34:15,086 INFO L276 IsEmpty]: Start isEmpty. Operand 1013 states and 2837 transitions. [2021-07-13 19:34:15,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:34:15,086 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:34:15,087 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:34:15,287 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2373,347 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:34:15,287 INFO L430 AbstractCegarLoop]: === Iteration 357 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:34:15,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:34:15,287 INFO L82 PathProgramCache]: Analyzing trace with hash 973957934, now seen corresponding path program 343 times [2021-07-13 19:34:15,287 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:34:15,288 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542109220] [2021-07-13 19:34:15,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:34:15,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:34:15,562 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:34:15,562 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:34:15,562 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542109220] [2021-07-13 19:34:15,562 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1542109220] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:34:15,562 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [635995398] [2021-07-13 19:34:15,562 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 348 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 348 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:34:15,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:34:15,591 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 53 conjunts are in the unsatisfiable core [2021-07-13 19:34:15,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:34:16,180 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:34:16,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:16,182 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:34:16,186 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 34 [2021-07-13 19:34:16,187 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:34:16,189 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:34:16,192 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:34:16,194 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 36 [2021-07-13 19:34:16,195 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:34:16,198 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:34:16,198 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 34 [2021-07-13 19:34:16,200 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:34:16,211 INFO L628 ElimStorePlain]: treesize reduction 62, result has 15.1 percent of original size [2021-07-13 19:34:16,211 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:34:16,212 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:34:16,212 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:170, output treesize:11 [2021-07-13 19:34:16,239 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:34:16,239 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [635995398] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:34:16,239 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:34:16,240 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-07-13 19:34:16,240 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492636782] [2021-07-13 19:34:16,240 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:34:16,240 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:34:16,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:34:16,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=373, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:34:16,240 INFO L87 Difference]: Start difference. First operand 1013 states and 2837 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:34:17,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:34:17,817 INFO L93 Difference]: Finished difference Result 1087 states and 2996 transitions. [2021-07-13 19:34:17,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 19:34:17,817 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:34:17,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:34:17,819 INFO L225 Difference]: With dead ends: 1087 [2021-07-13 19:34:17,819 INFO L226 Difference]: Without dead ends: 1078 [2021-07-13 19:34:17,819 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 1922.4ms TimeCoverageRelationStatistics Valid=159, Invalid=1173, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 19:34:17,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1078 states. [2021-07-13 19:34:17,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1078 to 1020. [2021-07-13 19:34:17,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1020 states, 1019 states have (on average 2.8115799803729145) internal successors, (2865), 1019 states have internal predecessors, (2865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:34:17,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1020 states to 1020 states and 2865 transitions. [2021-07-13 19:34:17,830 INFO L78 Accepts]: Start accepts. Automaton has 1020 states and 2865 transitions. Word has length 18 [2021-07-13 19:34:17,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:34:17,830 INFO L482 AbstractCegarLoop]: Abstraction has 1020 states and 2865 transitions. [2021-07-13 19:34:17,830 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:34:17,830 INFO L276 IsEmpty]: Start isEmpty. Operand 1020 states and 2865 transitions. [2021-07-13 19:34:17,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:34:17,831 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:34:17,831 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:34:18,031 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2406,348 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:34:18,031 INFO L430 AbstractCegarLoop]: === Iteration 358 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:34:18,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:34:18,032 INFO L82 PathProgramCache]: Analyzing trace with hash -507716664, now seen corresponding path program 344 times [2021-07-13 19:34:18,032 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:34:18,032 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159169957] [2021-07-13 19:34:18,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:34:18,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:34:18,199 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:34:18,199 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:34:18,199 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159169957] [2021-07-13 19:34:18,199 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [159169957] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:34:18,199 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [924539687] [2021-07-13 19:34:18,199 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 349 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 349 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:34:18,226 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:34:18,227 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:34:18,227 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 57 conjunts are in the unsatisfiable core [2021-07-13 19:34:18,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:34:18,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:18,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:18,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:18,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:18,801 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:34:18,805 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:34:18,806 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 28 [2021-07-13 19:34:18,808 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:34:18,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:18,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:18,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:18,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:18,813 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:34:18,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:18,817 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:34:18,819 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 36 [2021-07-13 19:34:18,820 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:34:18,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:18,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:18,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:18,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:18,826 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:34:18,830 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:34:18,831 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 36 [2021-07-13 19:34:18,832 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:34:18,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:18,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:18,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:18,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:18,837 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:34:18,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:18,838 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 44 [2021-07-13 19:34:18,840 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:34:18,897 INFO L628 ElimStorePlain]: treesize reduction 103, result has 39.4 percent of original size [2021-07-13 19:34:18,900 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:34:18,900 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-13 19:34:18,902 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-13 19:34:18,926 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:34:18,927 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:34:18,927 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 2 variables, input treesize:301, output treesize:62 [2021-07-13 19:34:19,007 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:34:19,008 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [924539687] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:34:19,008 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:34:19,008 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 20 [2021-07-13 19:34:19,008 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079255563] [2021-07-13 19:34:19,008 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 19:34:19,008 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:34:19,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 19:34:19,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:34:19,008 INFO L87 Difference]: Start difference. First operand 1020 states and 2865 transitions. Second operand has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:34:19,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:34:19,788 INFO L93 Difference]: Finished difference Result 1136 states and 3101 transitions. [2021-07-13 19:34:19,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-13 19:34:19,789 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:34:19,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:34:19,790 INFO L225 Difference]: With dead ends: 1136 [2021-07-13 19:34:19,790 INFO L226 Difference]: Without dead ends: 1129 [2021-07-13 19:34:19,791 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 1138.5ms TimeCoverageRelationStatistics Valid=136, Invalid=856, Unknown=0, NotChecked=0, Total=992 [2021-07-13 19:34:19,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1129 states. [2021-07-13 19:34:19,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1129 to 1037. [2021-07-13 19:34:19,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1037 states, 1036 states have (on average 2.8291505791505793) internal successors, (2931), 1036 states have internal predecessors, (2931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:34:19,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1037 states to 1037 states and 2931 transitions. [2021-07-13 19:34:19,802 INFO L78 Accepts]: Start accepts. Automaton has 1037 states and 2931 transitions. Word has length 18 [2021-07-13 19:34:19,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:34:19,802 INFO L482 AbstractCegarLoop]: Abstraction has 1037 states and 2931 transitions. [2021-07-13 19:34:19,802 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:34:19,802 INFO L276 IsEmpty]: Start isEmpty. Operand 1037 states and 2931 transitions. [2021-07-13 19:34:19,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:34:19,803 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:34:19,803 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:34:20,003 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2438,349 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:34:20,004 INFO L430 AbstractCegarLoop]: === Iteration 359 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:34:20,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:34:20,004 INFO L82 PathProgramCache]: Analyzing trace with hash -2018127868, now seen corresponding path program 345 times [2021-07-13 19:34:20,004 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:34:20,004 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422116702] [2021-07-13 19:34:20,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:34:20,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:34:20,232 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:34:20,232 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:34:20,232 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422116702] [2021-07-13 19:34:20,232 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1422116702] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:34:20,232 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [980786007] [2021-07-13 19:34:20,232 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 350 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 350 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:34:20,260 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-13 19:34:20,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:34:20,261 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 53 conjunts are in the unsatisfiable core [2021-07-13 19:34:20,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:34:20,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:20,914 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:34:20,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:20,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:20,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:20,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:20,917 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 38 [2021-07-13 19:34:20,919 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:34:20,942 INFO L628 ElimStorePlain]: treesize reduction 143, result has 7.1 percent of original size [2021-07-13 19:34:20,942 INFO L518 ElimStorePlain]: Eliminatee v_prenex_191 vanished before elimination [2021-07-13 19:34:20,942 INFO L518 ElimStorePlain]: Eliminatee array_0 vanished before elimination [2021-07-13 19:34:20,942 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:34:20,943 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:34:20,943 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:194, output treesize:11 [2021-07-13 19:34:20,970 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:34:20,970 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [980786007] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:34:20,970 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:34:20,970 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 20 [2021-07-13 19:34:20,970 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264070565] [2021-07-13 19:34:20,970 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 19:34:20,970 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:34:20,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 19:34:20,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:34:20,971 INFO L87 Difference]: Start difference. First operand 1037 states and 2931 transitions. Second operand has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:34:21,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:34:21,909 INFO L93 Difference]: Finished difference Result 1209 states and 3323 transitions. [2021-07-13 19:34:21,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 19:34:21,910 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:34:21,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:34:21,911 INFO L225 Difference]: With dead ends: 1209 [2021-07-13 19:34:21,911 INFO L226 Difference]: Without dead ends: 1205 [2021-07-13 19:34:21,912 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 1328.3ms TimeCoverageRelationStatistics Valid=130, Invalid=862, Unknown=0, NotChecked=0, Total=992 [2021-07-13 19:34:21,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1205 states. [2021-07-13 19:34:21,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1205 to 1051. [2021-07-13 19:34:21,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1051 states, 1050 states have (on average 2.84) internal successors, (2982), 1050 states have internal predecessors, (2982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:34:21,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1051 states to 1051 states and 2982 transitions. [2021-07-13 19:34:21,923 INFO L78 Accepts]: Start accepts. Automaton has 1051 states and 2982 transitions. Word has length 18 [2021-07-13 19:34:21,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:34:21,923 INFO L482 AbstractCegarLoop]: Abstraction has 1051 states and 2982 transitions. [2021-07-13 19:34:21,923 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:34:21,923 INFO L276 IsEmpty]: Start isEmpty. Operand 1051 states and 2982 transitions. [2021-07-13 19:34:21,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:34:21,925 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:34:21,925 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:34:22,125 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 350 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2448 [2021-07-13 19:34:22,125 INFO L430 AbstractCegarLoop]: === Iteration 360 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:34:22,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:34:22,125 INFO L82 PathProgramCache]: Analyzing trace with hash 1625646980, now seen corresponding path program 346 times [2021-07-13 19:34:22,126 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:34:22,126 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755847857] [2021-07-13 19:34:22,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:34:22,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:34:22,427 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:34:22,427 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:34:22,427 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755847857] [2021-07-13 19:34:22,427 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1755847857] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:34:22,427 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1353282236] [2021-07-13 19:34:22,427 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 351 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 351 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:34:22,455 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:34:22,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:34:22,456 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 53 conjunts are in the unsatisfiable core [2021-07-13 19:34:22,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:34:23,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:23,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:23,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:23,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:23,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:23,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:23,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:23,097 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:34:23,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:23,103 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:34:23,104 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 32 [2021-07-13 19:34:23,105 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:34:23,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:23,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:23,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:23,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:23,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:23,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:23,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:23,112 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:34:23,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:23,113 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 40 [2021-07-13 19:34:23,115 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:34:23,162 INFO L628 ElimStorePlain]: treesize reduction 95, result has 46.3 percent of original size [2021-07-13 19:34:23,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:23,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:23,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:23,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:23,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:23,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:23,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:23,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:23,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:23,170 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:34:23,170 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 42 [2021-07-13 19:34:23,172 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:34:23,181 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:34:23,181 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:34:23,183 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:34:23,184 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-13 19:34:23,185 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-13 19:34:23,194 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:34:23,195 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:34:23,195 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:257, output treesize:22 [2021-07-13 19:34:23,238 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:34:23,239 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1353282236] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:34:23,239 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:34:23,239 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-07-13 19:34:23,239 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509869402] [2021-07-13 19:34:23,239 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:34:23,239 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:34:23,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:34:23,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=375, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:34:23,239 INFO L87 Difference]: Start difference. First operand 1051 states and 2982 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:34:23,710 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 52 [2021-07-13 19:34:24,471 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 64 [2021-07-13 19:34:24,620 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 86 [2021-07-13 19:34:24,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:34:24,733 INFO L93 Difference]: Finished difference Result 1096 states and 3062 transitions. [2021-07-13 19:34:24,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 19:34:24,733 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:34:24,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:34:24,735 INFO L225 Difference]: With dead ends: 1096 [2021-07-13 19:34:24,735 INFO L226 Difference]: Without dead ends: 1082 [2021-07-13 19:34:24,735 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 1893.4ms TimeCoverageRelationStatistics Valid=125, Invalid=931, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 19:34:24,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1082 states. [2021-07-13 19:34:24,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1082 to 1022. [2021-07-13 19:34:24,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1022 states, 1021 states have (on average 2.8481880509304602) internal successors, (2908), 1021 states have internal predecessors, (2908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:34:24,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1022 states to 1022 states and 2908 transitions. [2021-07-13 19:34:24,746 INFO L78 Accepts]: Start accepts. Automaton has 1022 states and 2908 transitions. Word has length 18 [2021-07-13 19:34:24,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:34:24,746 INFO L482 AbstractCegarLoop]: Abstraction has 1022 states and 2908 transitions. [2021-07-13 19:34:24,746 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:34:24,746 INFO L276 IsEmpty]: Start isEmpty. Operand 1022 states and 2908 transitions. [2021-07-13 19:34:24,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:34:24,747 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:34:24,747 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:34:24,950 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 351 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2468 [2021-07-13 19:34:24,950 INFO L430 AbstractCegarLoop]: === Iteration 361 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:34:24,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:34:24,951 INFO L82 PathProgramCache]: Analyzing trace with hash -1596234936, now seen corresponding path program 347 times [2021-07-13 19:34:24,951 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:34:24,951 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952801250] [2021-07-13 19:34:24,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:34:24,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:34:25,223 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:34:25,223 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:34:25,224 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952801250] [2021-07-13 19:34:25,224 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1952801250] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:34:25,224 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [832468603] [2021-07-13 19:34:25,224 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 352 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 352 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:34:25,256 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:34:25,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:34:25,257 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 53 conjunts are in the unsatisfiable core [2021-07-13 19:34:25,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:34:25,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:25,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:25,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:25,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:25,883 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:34:25,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:25,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:25,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:25,888 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:34:25,890 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 40 [2021-07-13 19:34:25,892 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:34:25,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:25,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:25,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:25,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:25,897 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:34:25,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:25,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:25,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:25,900 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 42 [2021-07-13 19:34:25,902 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:34:25,914 INFO L628 ElimStorePlain]: treesize reduction 106, result has 9.4 percent of original size [2021-07-13 19:34:25,915 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:34:25,915 INFO L518 ElimStorePlain]: Eliminatee v_prenex_198 vanished before elimination [2021-07-13 19:34:25,915 INFO L518 ElimStorePlain]: Eliminatee v_prenex_199 vanished before elimination [2021-07-13 19:34:25,915 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:34:25,915 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 6 variables, input treesize:206, output treesize:11 [2021-07-13 19:34:25,944 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:34:25,945 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [832468603] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:34:25,945 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:34:25,945 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-07-13 19:34:25,945 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843202509] [2021-07-13 19:34:25,945 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:34:25,945 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:34:25,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:34:25,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=367, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:34:25,945 INFO L87 Difference]: Start difference. First operand 1022 states and 2908 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:34:27,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:34:27,153 INFO L93 Difference]: Finished difference Result 1197 states and 3268 transitions. [2021-07-13 19:34:27,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 19:34:27,154 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:34:27,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:34:27,155 INFO L225 Difference]: With dead ends: 1197 [2021-07-13 19:34:27,156 INFO L226 Difference]: Without dead ends: 1187 [2021-07-13 19:34:27,156 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 1523.7ms TimeCoverageRelationStatistics Valid=132, Invalid=924, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 19:34:27,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1187 states. [2021-07-13 19:34:27,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1187 to 1054. [2021-07-13 19:34:27,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1054 states, 1053 states have (on average 2.8622981956315288) internal successors, (3014), 1053 states have internal predecessors, (3014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:34:27,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1054 states to 1054 states and 3014 transitions. [2021-07-13 19:34:27,167 INFO L78 Accepts]: Start accepts. Automaton has 1054 states and 3014 transitions. Word has length 18 [2021-07-13 19:34:27,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:34:27,167 INFO L482 AbstractCegarLoop]: Abstraction has 1054 states and 3014 transitions. [2021-07-13 19:34:27,167 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:34:27,167 INFO L276 IsEmpty]: Start isEmpty. Operand 1054 states and 3014 transitions. [2021-07-13 19:34:27,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:34:27,168 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:34:27,168 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:34:27,369 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2487,352 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:34:27,369 INFO L430 AbstractCegarLoop]: === Iteration 362 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:34:27,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:34:27,369 INFO L82 PathProgramCache]: Analyzing trace with hash -561310396, now seen corresponding path program 348 times [2021-07-13 19:34:27,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:34:27,369 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518744919] [2021-07-13 19:34:27,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:34:27,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:34:27,640 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:34:27,640 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:34:27,640 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518744919] [2021-07-13 19:34:27,640 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [518744919] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:34:27,640 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1103228937] [2021-07-13 19:34:27,640 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 353 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 353 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:34:27,669 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-13 19:34:27,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:34:27,671 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 57 conjunts are in the unsatisfiable core [2021-07-13 19:34:27,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:34:28,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:28,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:28,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:28,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:28,210 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:34:28,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:28,214 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:34:28,215 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 36 [2021-07-13 19:34:28,217 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:34:28,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:28,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:28,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:28,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:28,223 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:34:28,228 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:34:28,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 36 [2021-07-13 19:34:28,230 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:34:28,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:28,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:28,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:28,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:28,236 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:34:28,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:28,240 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:34:28,242 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 44 [2021-07-13 19:34:28,243 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:34:28,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:28,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:28,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:28,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:28,249 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:34:28,249 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 28 [2021-07-13 19:34:28,251 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:34:28,306 INFO L628 ElimStorePlain]: treesize reduction 95, result has 41.4 percent of original size [2021-07-13 19:34:28,309 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:34:28,309 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-13 19:34:28,310 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-13 19:34:28,333 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:34:28,334 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:34:28,334 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 2 variables, input treesize:301, output treesize:62 [2021-07-13 19:34:28,423 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:34:28,424 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1103228937] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:34:28,424 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:34:28,424 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-07-13 19:34:28,424 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229613708] [2021-07-13 19:34:28,424 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 19:34:28,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:34:28,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 19:34:28,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:34:28,424 INFO L87 Difference]: Start difference. First operand 1054 states and 3014 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:34:29,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:34:29,422 INFO L93 Difference]: Finished difference Result 1175 states and 3258 transitions. [2021-07-13 19:34:29,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-13 19:34:29,422 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:34:29,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:34:29,424 INFO L225 Difference]: With dead ends: 1175 [2021-07-13 19:34:29,424 INFO L226 Difference]: Without dead ends: 1169 [2021-07-13 19:34:29,424 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 1280.1ms TimeCoverageRelationStatistics Valid=130, Invalid=992, Unknown=0, NotChecked=0, Total=1122 [2021-07-13 19:34:29,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1169 states. [2021-07-13 19:34:29,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1169 to 1084. [2021-07-13 19:34:29,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1084 states, 1083 states have (on average 2.853185595567867) internal successors, (3090), 1083 states have internal predecessors, (3090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:34:29,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1084 states to 1084 states and 3090 transitions. [2021-07-13 19:34:29,435 INFO L78 Accepts]: Start accepts. Automaton has 1084 states and 3090 transitions. Word has length 18 [2021-07-13 19:34:29,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:34:29,435 INFO L482 AbstractCegarLoop]: Abstraction has 1084 states and 3090 transitions. [2021-07-13 19:34:29,435 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:34:29,435 INFO L276 IsEmpty]: Start isEmpty. Operand 1084 states and 3090 transitions. [2021-07-13 19:34:29,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:34:29,436 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:34:29,437 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:34:29,637 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2507,353 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:34:29,637 INFO L430 AbstractCegarLoop]: === Iteration 363 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:34:29,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:34:29,637 INFO L82 PathProgramCache]: Analyzing trace with hash 100224874, now seen corresponding path program 349 times [2021-07-13 19:34:29,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:34:29,637 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435675626] [2021-07-13 19:34:29,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:34:29,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:34:30,200 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:34:30,200 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:34:30,200 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435675626] [2021-07-13 19:34:30,200 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1435675626] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:34:30,200 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1532170316] [2021-07-13 19:34:30,200 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 354 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 354 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:34:30,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:34:30,229 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 53 conjunts are in the unsatisfiable core [2021-07-13 19:34:30,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:34:30,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:30,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:30,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:30,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:30,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:30,836 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:34:30,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:30,841 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:34:30,842 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 38 [2021-07-13 19:34:30,844 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:34:30,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:30,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:30,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:30,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:30,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:30,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:30,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:30,851 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:34:30,857 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:34:30,857 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 40 [2021-07-13 19:34:30,859 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:34:30,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:30,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:30,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:30,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:30,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:30,864 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:34:30,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:30,865 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 38 [2021-07-13 19:34:30,867 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:34:30,878 INFO L628 ElimStorePlain]: treesize reduction 66, result has 14.3 percent of original size [2021-07-13 19:34:30,878 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:34:30,878 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:34:30,878 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:194, output treesize:11 [2021-07-13 19:34:30,911 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:34:30,911 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1532170316] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:34:30,911 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:34:30,912 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-07-13 19:34:30,912 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092886954] [2021-07-13 19:34:30,912 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 19:34:30,912 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:34:30,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 19:34:30,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=454, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:34:30,912 INFO L87 Difference]: Start difference. First operand 1084 states and 3090 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:34:31,655 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 57 [2021-07-13 19:34:32,518 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 74 [2021-07-13 19:34:32,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:34:32,856 INFO L93 Difference]: Finished difference Result 1234 states and 3429 transitions. [2021-07-13 19:34:32,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-13 19:34:32,856 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:34:32,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:34:32,858 INFO L225 Difference]: With dead ends: 1234 [2021-07-13 19:34:32,858 INFO L226 Difference]: Without dead ends: 1228 [2021-07-13 19:34:32,858 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 2340.5ms TimeCoverageRelationStatistics Valid=150, Invalid=1410, Unknown=0, NotChecked=0, Total=1560 [2021-07-13 19:34:32,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1228 states. [2021-07-13 19:34:32,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1228 to 1110. [2021-07-13 19:34:32,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1110 states, 1109 states have (on average 2.8674481514878267) internal successors, (3180), 1109 states have internal predecessors, (3180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:34:32,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1110 states to 1110 states and 3180 transitions. [2021-07-13 19:34:32,870 INFO L78 Accepts]: Start accepts. Automaton has 1110 states and 3180 transitions. Word has length 18 [2021-07-13 19:34:32,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:34:32,870 INFO L482 AbstractCegarLoop]: Abstraction has 1110 states and 3180 transitions. [2021-07-13 19:34:32,870 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:34:32,870 INFO L276 IsEmpty]: Start isEmpty. Operand 1110 states and 3180 transitions. [2021-07-13 19:34:32,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:34:32,872 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:34:32,872 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:34:33,072 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2517,354 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:34:33,072 INFO L430 AbstractCegarLoop]: === Iteration 364 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:34:33,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:34:33,072 INFO L82 PathProgramCache]: Analyzing trace with hash -1381449724, now seen corresponding path program 350 times [2021-07-13 19:34:33,072 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:34:33,073 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051231814] [2021-07-13 19:34:33,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:34:33,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:34:33,714 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:34:33,715 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:34:33,715 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051231814] [2021-07-13 19:34:33,715 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1051231814] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:34:33,715 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1315232393] [2021-07-13 19:34:33,715 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 355 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 355 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:34:33,743 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:34:33,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:34:33,744 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 57 conjunts are in the unsatisfiable core [2021-07-13 19:34:33,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:34:34,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:34,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:34,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:34,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:34,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:34,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:34,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:34,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:34,301 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:34:34,306 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:34:34,307 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 48 [2021-07-13 19:34:34,308 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:34:34,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:34,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:34,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:34,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:34,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:34,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:34,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:34,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:34,324 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:34:34,329 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:34:34,329 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 32 [2021-07-13 19:34:34,331 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:34:34,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:34,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:34,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:34,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:34,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:34,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:34,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:34,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:34,339 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:34:34,345 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:34:34,345 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 40 [2021-07-13 19:34:34,347 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:34:34,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:34,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:34,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:34,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:34,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:34,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:34,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:34,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:34,355 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:34:34,355 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 40 [2021-07-13 19:34:34,357 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:34:34,414 INFO L628 ElimStorePlain]: treesize reduction 99, result has 40.4 percent of original size [2021-07-13 19:34:34,417 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:34:34,417 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-13 19:34:34,418 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-13 19:34:34,441 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:34:34,442 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:34:34,442 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 2 variables, input treesize:333, output treesize:62 [2021-07-13 19:34:34,532 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:34:34,532 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1315232393] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:34:34,532 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:34:34,533 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-07-13 19:34:34,533 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784876729] [2021-07-13 19:34:34,533 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-13 19:34:34,533 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:34:34,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-13 19:34:34,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=483, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:34:34,533 INFO L87 Difference]: Start difference. First operand 1110 states and 3180 transitions. Second operand has 24 states, 24 states have (on average 1.3333333333333333) internal successors, (32), 24 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:34:35,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:34:35,745 INFO L93 Difference]: Finished difference Result 1169 states and 3296 transitions. [2021-07-13 19:34:35,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-13 19:34:35,745 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.3333333333333333) internal successors, (32), 24 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:34:35,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:34:35,747 INFO L225 Difference]: With dead ends: 1169 [2021-07-13 19:34:35,747 INFO L226 Difference]: Without dead ends: 1161 [2021-07-13 19:34:35,747 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 1982.1ms TimeCoverageRelationStatistics Valid=141, Invalid=1049, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 19:34:35,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1161 states. [2021-07-13 19:34:35,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1161 to 1116. [2021-07-13 19:34:35,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1116 states, 1115 states have (on average 2.8681614349775786) internal successors, (3198), 1115 states have internal predecessors, (3198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:34:35,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1116 states to 1116 states and 3198 transitions. [2021-07-13 19:34:35,759 INFO L78 Accepts]: Start accepts. Automaton has 1116 states and 3198 transitions. Word has length 18 [2021-07-13 19:34:35,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:34:35,760 INFO L482 AbstractCegarLoop]: Abstraction has 1116 states and 3198 transitions. [2021-07-13 19:34:35,760 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.3333333333333333) internal successors, (32), 24 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:34:35,760 INFO L276 IsEmpty]: Start isEmpty. Operand 1116 states and 3198 transitions. [2021-07-13 19:34:35,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:34:35,761 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:34:35,761 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:34:35,961 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2539,355 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:34:35,961 INFO L430 AbstractCegarLoop]: === Iteration 365 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:34:35,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:34:35,962 INFO L82 PathProgramCache]: Analyzing trace with hash -308364344, now seen corresponding path program 351 times [2021-07-13 19:34:35,962 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:34:35,962 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501300257] [2021-07-13 19:34:35,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:34:35,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:34:36,476 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:34:36,476 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:34:36,476 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501300257] [2021-07-13 19:34:36,476 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [501300257] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:34:36,476 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2088266897] [2021-07-13 19:34:36,476 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 356 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 356 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:34:36,506 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 19:34:36,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:34:36,507 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 53 conjunts are in the unsatisfiable core [2021-07-13 19:34:36,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:34:37,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:37,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:37,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:37,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:37,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:37,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:37,138 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:34:37,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:37,143 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:34:37,144 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 42 [2021-07-13 19:34:37,145 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:34:37,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:37,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:37,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:37,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:37,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:37,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:37,167 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:34:37,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:37,168 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 40 [2021-07-13 19:34:37,170 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:34:37,189 INFO L628 ElimStorePlain]: treesize reduction 116, result has 8.7 percent of original size [2021-07-13 19:34:37,189 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:34:37,189 INFO L518 ElimStorePlain]: Eliminatee v_prenex_201 vanished before elimination [2021-07-13 19:34:37,189 INFO L518 ElimStorePlain]: Eliminatee v_prenex_202 vanished before elimination [2021-07-13 19:34:37,190 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:34:37,190 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 6 variables, input treesize:206, output treesize:11 [2021-07-13 19:34:37,226 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:34:37,226 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2088266897] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:34:37,226 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:34:37,226 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-07-13 19:34:37,227 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747029802] [2021-07-13 19:34:37,227 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 19:34:37,227 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:34:37,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 19:34:37,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=459, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:34:37,227 INFO L87 Difference]: Start difference. First operand 1116 states and 3198 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:34:38,323 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 67 [2021-07-13 19:34:38,569 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 85 [2021-07-13 19:34:38,789 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 86 [2021-07-13 19:34:39,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:34:39,117 INFO L93 Difference]: Finished difference Result 1180 states and 3324 transitions. [2021-07-13 19:34:39,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 19:34:39,117 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:34:39,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:34:39,119 INFO L225 Difference]: With dead ends: 1180 [2021-07-13 19:34:39,119 INFO L226 Difference]: Without dead ends: 1172 [2021-07-13 19:34:39,119 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 2319.9ms TimeCoverageRelationStatistics Valid=144, Invalid=1338, Unknown=0, NotChecked=0, Total=1482 [2021-07-13 19:34:39,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1172 states. [2021-07-13 19:34:39,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1172 to 1122. [2021-07-13 19:34:39,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1122 states, 1121 states have (on average 2.8688670829616414) internal successors, (3216), 1121 states have internal predecessors, (3216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:34:39,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1122 states to 1122 states and 3216 transitions. [2021-07-13 19:34:39,131 INFO L78 Accepts]: Start accepts. Automaton has 1122 states and 3216 transitions. Word has length 18 [2021-07-13 19:34:39,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:34:39,131 INFO L482 AbstractCegarLoop]: Abstraction has 1122 states and 3216 transitions. [2021-07-13 19:34:39,131 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:34:39,131 INFO L276 IsEmpty]: Start isEmpty. Operand 1122 states and 3216 transitions. [2021-07-13 19:34:39,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:34:39,132 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:34:39,132 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:34:39,333 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2549,356 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:34:39,333 INFO L430 AbstractCegarLoop]: === Iteration 366 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:34:39,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:34:39,333 INFO L82 PathProgramCache]: Analyzing trace with hash -1402455932, now seen corresponding path program 352 times [2021-07-13 19:34:39,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:34:39,333 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435533222] [2021-07-13 19:34:39,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:34:39,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:34:39,727 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:34:39,728 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:34:39,728 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435533222] [2021-07-13 19:34:39,728 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1435533222] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:34:39,728 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1677875263] [2021-07-13 19:34:39,728 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 357 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 357 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:34:39,756 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:34:39,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:34:39,757 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 53 conjunts are in the unsatisfiable core [2021-07-13 19:34:39,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:34:40,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:40,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:40,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:40,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:40,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:40,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:40,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:40,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:40,437 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:34:40,443 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:34:40,444 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 32 [2021-07-13 19:34:40,445 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:34:40,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:40,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:40,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:40,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:40,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:40,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:40,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:40,452 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:34:40,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:40,453 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 40 [2021-07-13 19:34:40,455 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:34:40,499 INFO L628 ElimStorePlain]: treesize reduction 91, result has 47.4 percent of original size [2021-07-13 19:34:40,499 INFO L518 ElimStorePlain]: Eliminatee v_prenex_209 vanished before elimination [2021-07-13 19:34:40,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:40,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:40,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:40,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:40,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:40,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:40,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:40,505 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:34:40,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:40,506 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 42 [2021-07-13 19:34:40,507 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:34:40,517 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:34:40,519 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:34:40,519 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-13 19:34:40,521 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-13 19:34:40,530 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:34:40,531 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:34:40,531 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:257, output treesize:22 [2021-07-13 19:34:40,554 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:34:40,554 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1677875263] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:34:40,555 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:34:40,555 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-07-13 19:34:40,555 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733477102] [2021-07-13 19:34:40,555 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 19:34:40,555 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:34:40,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 19:34:40,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=418, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:34:40,555 INFO L87 Difference]: Start difference. First operand 1122 states and 3216 transitions. Second operand has 22 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 22 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:34:42,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:34:42,222 INFO L93 Difference]: Finished difference Result 1176 states and 3324 transitions. [2021-07-13 19:34:42,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 19:34:42,223 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 22 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:34:42,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:34:42,225 INFO L225 Difference]: With dead ends: 1176 [2021-07-13 19:34:42,225 INFO L226 Difference]: Without dead ends: 1173 [2021-07-13 19:34:42,225 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 1966.7ms TimeCoverageRelationStatistics Valid=105, Invalid=1085, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 19:34:42,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1173 states. [2021-07-13 19:34:42,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1173 to 1123. [2021-07-13 19:34:42,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1123 states, 1122 states have (on average 2.8689839572192515) internal successors, (3219), 1122 states have internal predecessors, (3219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:34:42,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1123 states to 1123 states and 3219 transitions. [2021-07-13 19:34:42,237 INFO L78 Accepts]: Start accepts. Automaton has 1123 states and 3219 transitions. Word has length 18 [2021-07-13 19:34:42,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:34:42,237 INFO L482 AbstractCegarLoop]: Abstraction has 1123 states and 3219 transitions. [2021-07-13 19:34:42,237 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 22 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:34:42,237 INFO L276 IsEmpty]: Start isEmpty. Operand 1123 states and 3219 transitions. [2021-07-13 19:34:42,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:34:42,238 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:34:42,238 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:34:42,439 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 357 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2569 [2021-07-13 19:34:42,439 INFO L430 AbstractCegarLoop]: === Iteration 367 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:34:42,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:34:42,439 INFO L82 PathProgramCache]: Analyzing trace with hash -1956158810, now seen corresponding path program 353 times [2021-07-13 19:34:42,439 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:34:42,439 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446125190] [2021-07-13 19:34:42,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:34:42,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:34:42,616 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:34:42,616 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:34:42,616 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446125190] [2021-07-13 19:34:42,616 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1446125190] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:34:42,617 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [827734242] [2021-07-13 19:34:42,617 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 358 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 358 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:34:42,645 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:34:42,645 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:34:42,646 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 53 conjunts are in the unsatisfiable core [2021-07-13 19:34:42,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:34:43,114 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:34:43,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:43,116 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:34:43,120 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 34 [2021-07-13 19:34:43,122 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:34:43,125 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:34:43,127 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:34:43,129 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 36 [2021-07-13 19:34:43,131 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:34:43,133 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:34:43,133 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 34 [2021-07-13 19:34:43,135 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:34:43,147 INFO L628 ElimStorePlain]: treesize reduction 72, result has 13.3 percent of original size [2021-07-13 19:34:43,147 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:34:43,147 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:34:43,147 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:170, output treesize:11 [2021-07-13 19:34:43,155 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:34:43,155 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [827734242] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:34:43,155 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:34:43,155 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-07-13 19:34:43,155 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993010600] [2021-07-13 19:34:43,155 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:34:43,155 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:34:43,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:34:43,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=367, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:34:43,156 INFO L87 Difference]: Start difference. First operand 1123 states and 3219 transitions. Second operand has 21 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:34:43,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:34:43,629 INFO L93 Difference]: Finished difference Result 1166 states and 3305 transitions. [2021-07-13 19:34:43,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 19:34:43,630 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:34:43,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:34:43,631 INFO L225 Difference]: With dead ends: 1166 [2021-07-13 19:34:43,631 INFO L226 Difference]: Without dead ends: 1159 [2021-07-13 19:34:43,632 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 761.4ms TimeCoverageRelationStatistics Valid=101, Invalid=711, Unknown=0, NotChecked=0, Total=812 [2021-07-13 19:34:43,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1159 states. [2021-07-13 19:34:43,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1159 to 1131. [2021-07-13 19:34:43,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1131 states, 1130 states have (on average 2.8628318584070795) internal successors, (3235), 1130 states have internal predecessors, (3235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:34:43,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1131 states to 1131 states and 3235 transitions. [2021-07-13 19:34:43,644 INFO L78 Accepts]: Start accepts. Automaton has 1131 states and 3235 transitions. Word has length 18 [2021-07-13 19:34:43,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:34:43,645 INFO L482 AbstractCegarLoop]: Abstraction has 1131 states and 3235 transitions. [2021-07-13 19:34:43,645 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:34:43,645 INFO L276 IsEmpty]: Start isEmpty. Operand 1131 states and 3235 transitions. [2021-07-13 19:34:43,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:34:43,646 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:34:43,646 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:34:43,846 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 358 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2589 [2021-07-13 19:34:43,846 INFO L430 AbstractCegarLoop]: === Iteration 368 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:34:43,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:34:43,847 INFO L82 PathProgramCache]: Analyzing trace with hash -454160794, now seen corresponding path program 354 times [2021-07-13 19:34:43,847 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:34:43,847 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527178637] [2021-07-13 19:34:43,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:34:43,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:34:44,043 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:34:44,043 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:34:44,043 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527178637] [2021-07-13 19:34:44,043 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1527178637] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:34:44,043 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [682153987] [2021-07-13 19:34:44,043 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 359 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 359 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:34:44,072 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:34:44,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:34:44,073 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 53 conjunts are in the unsatisfiable core [2021-07-13 19:34:44,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:34:44,585 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:34:44,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:44,588 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:34:44,591 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 34 [2021-07-13 19:34:44,593 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:34:44,595 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:34:44,597 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:34:44,599 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 36 [2021-07-13 19:34:44,601 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:34:44,603 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:34:44,603 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 34 [2021-07-13 19:34:44,605 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:34:44,617 INFO L628 ElimStorePlain]: treesize reduction 76, result has 12.6 percent of original size [2021-07-13 19:34:44,617 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:34:44,618 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:34:44,618 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:170, output treesize:11 [2021-07-13 19:34:44,626 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:34:44,626 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [682153987] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:34:44,626 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:34:44,626 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-07-13 19:34:44,626 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334313599] [2021-07-13 19:34:44,626 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:34:44,626 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:34:44,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:34:44,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:34:44,627 INFO L87 Difference]: Start difference. First operand 1131 states and 3235 transitions. Second operand has 21 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:34:45,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:34:45,247 INFO L93 Difference]: Finished difference Result 1217 states and 3385 transitions. [2021-07-13 19:34:45,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:34:45,248 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:34:45,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:34:45,249 INFO L225 Difference]: With dead ends: 1217 [2021-07-13 19:34:45,249 INFO L226 Difference]: Without dead ends: 1207 [2021-07-13 19:34:45,249 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 919.1ms TimeCoverageRelationStatistics Valid=139, Invalid=791, Unknown=0, NotChecked=0, Total=930 [2021-07-13 19:34:45,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1207 states. [2021-07-13 19:34:45,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1207 to 1153. [2021-07-13 19:34:45,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1153 states, 1152 states have (on average 2.859375) internal successors, (3294), 1152 states have internal predecessors, (3294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:34:45,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1153 states to 1153 states and 3294 transitions. [2021-07-13 19:34:45,269 INFO L78 Accepts]: Start accepts. Automaton has 1153 states and 3294 transitions. Word has length 18 [2021-07-13 19:34:45,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:34:45,269 INFO L482 AbstractCegarLoop]: Abstraction has 1153 states and 3294 transitions. [2021-07-13 19:34:45,269 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:34:45,270 INFO L276 IsEmpty]: Start isEmpty. Operand 1153 states and 3294 transitions. [2021-07-13 19:34:45,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:34:45,271 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:34:45,271 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:34:45,471 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 359 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2619 [2021-07-13 19:34:45,471 INFO L430 AbstractCegarLoop]: === Iteration 369 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:34:45,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:34:45,472 INFO L82 PathProgramCache]: Analyzing trace with hash -206788058, now seen corresponding path program 355 times [2021-07-13 19:34:45,472 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:34:45,472 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171173789] [2021-07-13 19:34:45,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:34:45,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:34:45,886 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:34:45,886 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:34:45,886 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171173789] [2021-07-13 19:34:45,886 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1171173789] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:34:45,886 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1616421469] [2021-07-13 19:34:45,887 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 360 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 360 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:34:45,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:34:45,915 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 53 conjunts are in the unsatisfiable core [2021-07-13 19:34:45,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:34:46,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:46,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:46,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:46,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:46,596 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:34:46,596 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 36 [2021-07-13 19:34:46,598 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:34:46,616 INFO L628 ElimStorePlain]: treesize reduction 139, result has 7.3 percent of original size [2021-07-13 19:34:46,617 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:34:46,617 INFO L518 ElimStorePlain]: Eliminatee v_prenex_211 vanished before elimination [2021-07-13 19:34:46,617 INFO L518 ElimStorePlain]: Eliminatee v_prenex_212 vanished before elimination [2021-07-13 19:34:46,617 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:34:46,617 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:182, output treesize:11 [2021-07-13 19:34:46,651 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:34:46,651 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1616421469] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:34:46,651 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:34:46,651 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-07-13 19:34:46,651 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310850323] [2021-07-13 19:34:46,651 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 19:34:46,651 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:34:46,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 19:34:46,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=454, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:34:46,652 INFO L87 Difference]: Start difference. First operand 1153 states and 3294 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:34:47,527 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 58 [2021-07-13 19:34:47,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:34:47,741 INFO L93 Difference]: Finished difference Result 1167 states and 3321 transitions. [2021-07-13 19:34:47,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:34:47,742 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:34:47,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:34:47,744 INFO L225 Difference]: With dead ends: 1167 [2021-07-13 19:34:47,744 INFO L226 Difference]: Without dead ends: 1164 [2021-07-13 19:34:47,744 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 1721.7ms TimeCoverageRelationStatistics Valid=104, Invalid=952, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 19:34:47,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1164 states. [2021-07-13 19:34:47,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1164 to 1153. [2021-07-13 19:34:47,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1153 states, 1152 states have (on average 2.859375) internal successors, (3294), 1152 states have internal predecessors, (3294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:34:47,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1153 states to 1153 states and 3294 transitions. [2021-07-13 19:34:47,756 INFO L78 Accepts]: Start accepts. Automaton has 1153 states and 3294 transitions. Word has length 18 [2021-07-13 19:34:47,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:34:47,756 INFO L482 AbstractCegarLoop]: Abstraction has 1153 states and 3294 transitions. [2021-07-13 19:34:47,756 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:34:47,756 INFO L276 IsEmpty]: Start isEmpty. Operand 1153 states and 3294 transitions. [2021-07-13 19:34:47,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:34:47,758 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:34:47,758 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:34:47,958 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2650,360 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:34:47,958 INFO L430 AbstractCegarLoop]: === Iteration 370 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:34:47,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:34:47,958 INFO L82 PathProgramCache]: Analyzing trace with hash 207374476, now seen corresponding path program 356 times [2021-07-13 19:34:47,958 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:34:47,958 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473752138] [2021-07-13 19:34:47,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:34:47,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:34:48,256 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:34:48,256 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:34:48,256 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473752138] [2021-07-13 19:34:48,256 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1473752138] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:34:48,256 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1242791523] [2021-07-13 19:34:48,256 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 361 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 361 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:34:48,284 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:34:48,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:34:48,285 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 53 conjunts are in the unsatisfiable core [2021-07-13 19:34:48,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:34:48,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:48,918 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:34:48,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:48,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:48,921 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:34:48,923 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 36 [2021-07-13 19:34:48,925 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:34:48,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:48,928 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:34:48,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:48,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:48,932 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:34:48,934 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 36 [2021-07-13 19:34:48,936 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:34:48,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:48,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:48,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:48,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:48,940 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:34:48,941 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 38 [2021-07-13 19:34:48,942 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:34:48,955 INFO L628 ElimStorePlain]: treesize reduction 76, result has 12.6 percent of original size [2021-07-13 19:34:48,955 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:34:48,955 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:34:48,956 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:182, output treesize:11 [2021-07-13 19:34:48,984 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:34:48,984 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1242791523] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:34:48,984 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:34:48,984 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-07-13 19:34:48,984 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269357642] [2021-07-13 19:34:48,984 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:34:48,984 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:34:48,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:34:48,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=366, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:34:48,985 INFO L87 Difference]: Start difference. First operand 1153 states and 3294 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:34:49,869 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 57 [2021-07-13 19:34:50,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:34:50,113 INFO L93 Difference]: Finished difference Result 1228 states and 3438 transitions. [2021-07-13 19:34:50,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 19:34:50,113 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:34:50,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:34:50,115 INFO L225 Difference]: With dead ends: 1228 [2021-07-13 19:34:50,115 INFO L226 Difference]: Without dead ends: 1225 [2021-07-13 19:34:50,115 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 1577.2ms TimeCoverageRelationStatistics Valid=129, Invalid=863, Unknown=0, NotChecked=0, Total=992 [2021-07-13 19:34:50,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1225 states. [2021-07-13 19:34:50,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1225 to 1172. [2021-07-13 19:34:50,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1172 states, 1171 states have (on average 2.8659265584970113) internal successors, (3356), 1171 states have internal predecessors, (3356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:34:50,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1172 states to 1172 states and 3356 transitions. [2021-07-13 19:34:50,127 INFO L78 Accepts]: Start accepts. Automaton has 1172 states and 3356 transitions. Word has length 18 [2021-07-13 19:34:50,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:34:50,127 INFO L482 AbstractCegarLoop]: Abstraction has 1172 states and 3356 transitions. [2021-07-13 19:34:50,127 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:34:50,127 INFO L276 IsEmpty]: Start isEmpty. Operand 1172 states and 3356 transitions. [2021-07-13 19:34:50,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:34:50,134 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:34:50,134 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:34:50,334 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 361 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2669 [2021-07-13 19:34:50,335 INFO L430 AbstractCegarLoop]: === Iteration 371 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:34:50,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:34:50,335 INFO L82 PathProgramCache]: Analyzing trace with hash 215104874, now seen corresponding path program 357 times [2021-07-13 19:34:50,335 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:34:50,335 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674327130] [2021-07-13 19:34:50,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:34:50,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:34:50,506 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:34:50,506 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:34:50,506 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674327130] [2021-07-13 19:34:50,506 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1674327130] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:34:50,506 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [879776767] [2021-07-13 19:34:50,506 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 362 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 362 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:34:50,535 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-13 19:34:50,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:34:50,536 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 53 conjunts are in the unsatisfiable core [2021-07-13 19:34:50,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:34:51,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:51,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:51,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:51,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:51,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:51,161 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:34:51,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:51,166 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:34:51,167 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 38 [2021-07-13 19:34:51,169 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:34:51,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:51,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:51,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:51,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:51,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:51,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:51,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:51,176 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:34:51,177 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 40 [2021-07-13 19:34:51,178 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:34:51,190 INFO L628 ElimStorePlain]: treesize reduction 108, result has 9.2 percent of original size [2021-07-13 19:34:51,190 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:34:51,190 INFO L518 ElimStorePlain]: Eliminatee v_prenex_214 vanished before elimination [2021-07-13 19:34:51,190 INFO L518 ElimStorePlain]: Eliminatee v_prenex_215 vanished before elimination [2021-07-13 19:34:51,190 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:34:51,190 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 6 variables, input treesize:194, output treesize:11 [2021-07-13 19:34:51,199 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:34:51,199 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [879776767] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:34:51,199 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:34:51,199 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 19 [2021-07-13 19:34:51,200 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984405999] [2021-07-13 19:34:51,200 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:34:51,200 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:34:51,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:34:51,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:34:51,200 INFO L87 Difference]: Start difference. First operand 1172 states and 3356 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:34:51,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:34:51,737 INFO L93 Difference]: Finished difference Result 1280 states and 3562 transitions. [2021-07-13 19:34:51,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:34:51,738 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:34:51,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:34:51,740 INFO L225 Difference]: With dead ends: 1280 [2021-07-13 19:34:51,740 INFO L226 Difference]: Without dead ends: 1276 [2021-07-13 19:34:51,740 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 887.1ms TimeCoverageRelationStatistics Valid=83, Invalid=469, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:34:51,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1276 states. [2021-07-13 19:34:51,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1276 to 1203. [2021-07-13 19:34:51,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1203 states, 1202 states have (on average 2.866056572379368) internal successors, (3445), 1202 states have internal predecessors, (3445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:34:51,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1203 states to 1203 states and 3445 transitions. [2021-07-13 19:34:51,753 INFO L78 Accepts]: Start accepts. Automaton has 1203 states and 3445 transitions. Word has length 18 [2021-07-13 19:34:51,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:34:51,753 INFO L482 AbstractCegarLoop]: Abstraction has 1203 states and 3445 transitions. [2021-07-13 19:34:51,753 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:34:51,753 INFO L276 IsEmpty]: Start isEmpty. Operand 1203 states and 3445 transitions. [2021-07-13 19:34:51,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:34:51,754 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:34:51,754 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:34:51,954 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2693,362 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:34:51,955 INFO L430 AbstractCegarLoop]: === Iteration 372 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:34:51,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:34:51,955 INFO L82 PathProgramCache]: Analyzing trace with hash -1274300122, now seen corresponding path program 358 times [2021-07-13 19:34:51,955 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:34:51,955 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503518127] [2021-07-13 19:34:51,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:34:51,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:34:52,315 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:34:52,315 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:34:52,315 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503518127] [2021-07-13 19:34:52,316 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [503518127] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:34:52,316 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2080672430] [2021-07-13 19:34:52,316 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 363 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 363 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:34:52,342 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:34:52,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:34:52,343 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 53 conjunts are in the unsatisfiable core [2021-07-13 19:34:52,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:34:52,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:52,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:52,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:52,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:52,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:52,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:52,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:52,992 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:34:52,992 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 38 [2021-07-13 19:34:52,994 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:34:53,011 INFO L628 ElimStorePlain]: treesize reduction 147, result has 7.0 percent of original size [2021-07-13 19:34:53,012 INFO L518 ElimStorePlain]: Eliminatee v_prenex_218 vanished before elimination [2021-07-13 19:34:53,012 INFO L518 ElimStorePlain]: Eliminatee array_0 vanished before elimination [2021-07-13 19:34:53,012 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:34:53,012 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:34:53,012 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:194, output treesize:11 [2021-07-13 19:34:53,046 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:34:53,046 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2080672430] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:34:53,046 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:34:53,046 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-07-13 19:34:53,046 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352585680] [2021-07-13 19:34:53,046 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 19:34:53,046 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:34:53,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 19:34:53,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=412, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:34:53,047 INFO L87 Difference]: Start difference. First operand 1203 states and 3445 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:34:53,786 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 59 [2021-07-13 19:34:54,138 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 55 [2021-07-13 19:34:54,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:34:54,571 INFO L93 Difference]: Finished difference Result 1294 states and 3628 transitions. [2021-07-13 19:34:54,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 19:34:54,572 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:34:54,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:34:54,574 INFO L225 Difference]: With dead ends: 1294 [2021-07-13 19:34:54,574 INFO L226 Difference]: Without dead ends: 1288 [2021-07-13 19:34:54,574 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 1870.3ms TimeCoverageRelationStatistics Valid=126, Invalid=1064, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 19:34:54,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1288 states. [2021-07-13 19:34:54,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1288 to 1215. [2021-07-13 19:34:54,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1215 states, 1214 states have (on average 2.8739703459637562) internal successors, (3489), 1214 states have internal predecessors, (3489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:34:54,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1215 states to 1215 states and 3489 transitions. [2021-07-13 19:34:54,588 INFO L78 Accepts]: Start accepts. Automaton has 1215 states and 3489 transitions. Word has length 18 [2021-07-13 19:34:54,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:34:54,588 INFO L482 AbstractCegarLoop]: Abstraction has 1215 states and 3489 transitions. [2021-07-13 19:34:54,588 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:34:54,588 INFO L276 IsEmpty]: Start isEmpty. Operand 1215 states and 3489 transitions. [2021-07-13 19:34:54,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:34:54,590 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:34:54,590 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:34:54,792 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2713,363 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:34:54,793 INFO L430 AbstractCegarLoop]: === Iteration 373 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:34:54,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:34:54,793 INFO L82 PathProgramCache]: Analyzing trace with hash -1080521118, now seen corresponding path program 359 times [2021-07-13 19:34:54,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:34:54,793 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741051628] [2021-07-13 19:34:54,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:34:54,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:34:54,975 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:34:54,975 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:34:54,975 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741051628] [2021-07-13 19:34:54,975 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1741051628] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:34:54,975 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [179263888] [2021-07-13 19:34:54,975 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 364 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 364 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:34:55,004 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:34:55,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:34:55,005 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 53 conjunts are in the unsatisfiable core [2021-07-13 19:34:55,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:34:55,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:55,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:55,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:55,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:55,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:55,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:55,581 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:34:55,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:55,586 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:34:55,587 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 42 [2021-07-13 19:34:55,588 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:34:55,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:55,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:55,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:55,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:55,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:55,594 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:34:55,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:55,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:55,596 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 40 [2021-07-13 19:34:55,598 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:34:55,610 INFO L628 ElimStorePlain]: treesize reduction 110, result has 9.1 percent of original size [2021-07-13 19:34:55,610 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:34:55,610 INFO L518 ElimStorePlain]: Eliminatee v_prenex_220 vanished before elimination [2021-07-13 19:34:55,610 INFO L518 ElimStorePlain]: Eliminatee v_prenex_221 vanished before elimination [2021-07-13 19:34:55,610 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:34:55,610 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 6 variables, input treesize:206, output treesize:11 [2021-07-13 19:34:55,636 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:34:55,636 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [179263888] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:34:55,636 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:34:55,636 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 20 [2021-07-13 19:34:55,637 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178410619] [2021-07-13 19:34:55,637 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 19:34:55,637 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:34:55,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 19:34:55,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:34:55,637 INFO L87 Difference]: Start difference. First operand 1215 states and 3489 transitions. Second operand has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:34:56,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:34:56,288 INFO L93 Difference]: Finished difference Result 1295 states and 3647 transitions. [2021-07-13 19:34:56,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 19:34:56,288 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:34:56,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:34:56,290 INFO L225 Difference]: With dead ends: 1295 [2021-07-13 19:34:56,290 INFO L226 Difference]: Without dead ends: 1291 [2021-07-13 19:34:56,290 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 979.9ms TimeCoverageRelationStatistics Valid=92, Invalid=558, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:34:56,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1291 states. [2021-07-13 19:34:56,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1291 to 1238. [2021-07-13 19:34:56,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1238 states, 1237 states have (on average 2.8746968472109944) internal successors, (3556), 1237 states have internal predecessors, (3556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:34:56,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1238 states to 1238 states and 3556 transitions. [2021-07-13 19:34:56,304 INFO L78 Accepts]: Start accepts. Automaton has 1238 states and 3556 transitions. Word has length 18 [2021-07-13 19:34:56,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:34:56,304 INFO L482 AbstractCegarLoop]: Abstraction has 1238 states and 3556 transitions. [2021-07-13 19:34:56,304 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:34:56,304 INFO L276 IsEmpty]: Start isEmpty. Operand 1238 states and 3556 transitions. [2021-07-13 19:34:56,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:34:56,305 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:34:56,305 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:34:56,508 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 364 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2732 [2021-07-13 19:34:56,509 INFO L430 AbstractCegarLoop]: === Iteration 374 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:34:56,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:34:56,509 INFO L82 PathProgramCache]: Analyzing trace with hash -7435738, now seen corresponding path program 360 times [2021-07-13 19:34:56,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:34:56,509 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772406990] [2021-07-13 19:34:56,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:34:56,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:34:56,812 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:34:56,812 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:34:56,812 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772406990] [2021-07-13 19:34:56,813 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [772406990] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:34:56,813 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [362162915] [2021-07-13 19:34:56,813 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 365 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 365 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:34:56,841 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:34:56,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:34:56,842 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 53 conjunts are in the unsatisfiable core [2021-07-13 19:34:56,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:34:57,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:57,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:57,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:57,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:57,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:57,470 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:34:57,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:57,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:57,472 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 40 [2021-07-13 19:34:57,474 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:34:57,491 INFO L628 ElimStorePlain]: treesize reduction 155, result has 6.6 percent of original size [2021-07-13 19:34:57,491 INFO L518 ElimStorePlain]: Eliminatee array_0 vanished before elimination [2021-07-13 19:34:57,491 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:34:57,492 INFO L518 ElimStorePlain]: Eliminatee v_prenex_227 vanished before elimination [2021-07-13 19:34:57,492 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:34:57,492 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:206, output treesize:11 [2021-07-13 19:34:57,521 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:34:57,521 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [362162915] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:34:57,522 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:34:57,522 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-07-13 19:34:57,522 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163706080] [2021-07-13 19:34:57,522 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:34:57,522 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:34:57,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:34:57,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:34:57,522 INFO L87 Difference]: Start difference. First operand 1238 states and 3556 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:34:58,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:34:58,535 INFO L93 Difference]: Finished difference Result 1375 states and 3810 transitions. [2021-07-13 19:34:58,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 19:34:58,535 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:34:58,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:34:58,537 INFO L225 Difference]: With dead ends: 1375 [2021-07-13 19:34:58,537 INFO L226 Difference]: Without dead ends: 1366 [2021-07-13 19:34:58,538 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 1299.8ms TimeCoverageRelationStatistics Valid=110, Invalid=760, Unknown=0, NotChecked=0, Total=870 [2021-07-13 19:34:58,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1366 states. [2021-07-13 19:34:58,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1366 to 1253. [2021-07-13 19:34:58,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1253 states, 1252 states have (on average 2.876996805111821) internal successors, (3602), 1252 states have internal predecessors, (3602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:34:58,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1253 states to 1253 states and 3602 transitions. [2021-07-13 19:34:58,552 INFO L78 Accepts]: Start accepts. Automaton has 1253 states and 3602 transitions. Word has length 18 [2021-07-13 19:34:58,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:34:58,552 INFO L482 AbstractCegarLoop]: Abstraction has 1253 states and 3602 transitions. [2021-07-13 19:34:58,552 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:34:58,552 INFO L276 IsEmpty]: Start isEmpty. Operand 1253 states and 3602 transitions. [2021-07-13 19:34:58,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:34:58,553 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:34:58,553 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:34:58,754 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 365 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2751 [2021-07-13 19:34:58,754 INFO L430 AbstractCegarLoop]: === Iteration 375 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:34:58,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:34:58,754 INFO L82 PathProgramCache]: Analyzing trace with hash 2113335308, now seen corresponding path program 361 times [2021-07-13 19:34:58,754 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:34:58,754 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218208272] [2021-07-13 19:34:58,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:34:58,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:34:59,331 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:34:59,331 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:34:59,331 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218208272] [2021-07-13 19:34:59,331 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [218208272] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:34:59,331 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1803147811] [2021-07-13 19:34:59,332 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 366 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 366 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:34:59,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:34:59,361 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 53 conjunts are in the unsatisfiable core [2021-07-13 19:34:59,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:34:59,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:59,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:59,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:59,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:59,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:59,961 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:34:59,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:59,967 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:34:59,968 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 38 [2021-07-13 19:34:59,970 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:34:59,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:59,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:59,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:59,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:59,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:59,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:59,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:59,977 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:34:59,982 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:34:59,983 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 40 [2021-07-13 19:34:59,985 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:34:59,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:59,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:59,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:59,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:59,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:59,990 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:34:59,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:34:59,991 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 38 [2021-07-13 19:34:59,993 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:35:00,007 INFO L628 ElimStorePlain]: treesize reduction 72, result has 13.3 percent of original size [2021-07-13 19:35:00,007 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:35:00,007 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:35:00,007 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:194, output treesize:11 [2021-07-13 19:35:00,040 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:35:00,040 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1803147811] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:35:00,040 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:35:00,040 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-07-13 19:35:00,040 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270212545] [2021-07-13 19:35:00,040 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 19:35:00,040 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:35:00,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 19:35:00,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=448, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:35:00,041 INFO L87 Difference]: Start difference. First operand 1253 states and 3602 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:35:01,238 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 73 [2021-07-13 19:35:01,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:35:01,539 INFO L93 Difference]: Finished difference Result 1373 states and 3845 transitions. [2021-07-13 19:35:01,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 19:35:01,539 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:35:01,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:35:01,541 INFO L225 Difference]: With dead ends: 1373 [2021-07-13 19:35:01,541 INFO L226 Difference]: Without dead ends: 1367 [2021-07-13 19:35:01,541 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 2027.9ms TimeCoverageRelationStatistics Valid=126, Invalid=1064, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 19:35:01,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1367 states. [2021-07-13 19:35:01,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1367 to 1287. [2021-07-13 19:35:01,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1287 states, 1286 states have (on average 2.8833592534992225) internal successors, (3708), 1286 states have internal predecessors, (3708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:35:01,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1287 states to 1287 states and 3708 transitions. [2021-07-13 19:35:01,556 INFO L78 Accepts]: Start accepts. Automaton has 1287 states and 3708 transitions. Word has length 18 [2021-07-13 19:35:01,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:35:01,556 INFO L482 AbstractCegarLoop]: Abstraction has 1287 states and 3708 transitions. [2021-07-13 19:35:01,556 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:35:01,556 INFO L276 IsEmpty]: Start isEmpty. Operand 1287 states and 3708 transitions. [2021-07-13 19:35:01,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:35:01,557 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:35:01,557 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:35:01,757 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2770,366 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:35:01,758 INFO L430 AbstractCegarLoop]: === Iteration 376 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:35:01,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:35:01,758 INFO L82 PathProgramCache]: Analyzing trace with hash 631660710, now seen corresponding path program 362 times [2021-07-13 19:35:01,758 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:35:01,758 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509050585] [2021-07-13 19:35:01,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:35:01,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:35:02,389 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:35:02,390 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:35:02,390 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509050585] [2021-07-13 19:35:02,390 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [509050585] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:35:02,390 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1662805919] [2021-07-13 19:35:02,390 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 367 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 367 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:35:02,418 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:35:02,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:35:02,419 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 53 conjunts are in the unsatisfiable core [2021-07-13 19:35:02,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:35:03,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:03,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:03,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:03,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:03,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:03,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:03,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:03,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:03,074 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:35:03,075 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 40 [2021-07-13 19:35:03,076 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:35:03,111 INFO L628 ElimStorePlain]: treesize reduction 155, result has 6.6 percent of original size [2021-07-13 19:35:03,112 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:35:03,112 INFO L518 ElimStorePlain]: Eliminatee v_prenex_230 vanished before elimination [2021-07-13 19:35:03,112 INFO L518 ElimStorePlain]: Eliminatee v_prenex_231 vanished before elimination [2021-07-13 19:35:03,112 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:35:03,112 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:206, output treesize:11 [2021-07-13 19:35:03,151 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:35:03,152 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1662805919] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:35:03,152 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:35:03,152 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-07-13 19:35:03,152 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330646384] [2021-07-13 19:35:03,152 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 19:35:03,152 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:35:03,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 19:35:03,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=455, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:35:03,153 INFO L87 Difference]: Start difference. First operand 1287 states and 3708 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:35:03,412 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 47 [2021-07-13 19:35:04,541 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 72 [2021-07-13 19:35:04,746 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 90 [2021-07-13 19:35:05,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:35:05,068 INFO L93 Difference]: Finished difference Result 1347 states and 3831 transitions. [2021-07-13 19:35:05,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 19:35:05,073 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:35:05,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:35:05,075 INFO L225 Difference]: With dead ends: 1347 [2021-07-13 19:35:05,075 INFO L226 Difference]: Without dead ends: 1339 [2021-07-13 19:35:05,075 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 2605.0ms TimeCoverageRelationStatistics Valid=142, Invalid=1264, Unknown=0, NotChecked=0, Total=1406 [2021-07-13 19:35:05,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1339 states. [2021-07-13 19:35:05,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1339 to 1304. [2021-07-13 19:35:05,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1304 states, 1303 states have (on average 2.8848810437452035) internal successors, (3759), 1303 states have internal predecessors, (3759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:35:05,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1304 states to 1304 states and 3759 transitions. [2021-07-13 19:35:05,094 INFO L78 Accepts]: Start accepts. Automaton has 1304 states and 3759 transitions. Word has length 18 [2021-07-13 19:35:05,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:35:05,094 INFO L482 AbstractCegarLoop]: Abstraction has 1304 states and 3759 transitions. [2021-07-13 19:35:05,094 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:35:05,094 INFO L276 IsEmpty]: Start isEmpty. Operand 1304 states and 3759 transitions. [2021-07-13 19:35:05,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:35:05,095 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:35:05,095 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:35:05,296 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2795,367 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:35:05,296 INFO L430 AbstractCegarLoop]: === Iteration 377 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:35:05,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:35:05,296 INFO L82 PathProgramCache]: Analyzing trace with hash 1704746090, now seen corresponding path program 363 times [2021-07-13 19:35:05,296 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:35:05,296 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202804057] [2021-07-13 19:35:05,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:35:05,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:35:05,996 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:35:05,997 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:35:05,997 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202804057] [2021-07-13 19:35:05,997 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1202804057] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:35:05,997 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1898235493] [2021-07-13 19:35:05,997 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 368 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 368 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:35:06,027 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 19:35:06,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:35:06,028 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 53 conjunts are in the unsatisfiable core [2021-07-13 19:35:06,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:35:06,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:06,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:06,699 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:35:06,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:06,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:06,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:06,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:06,702 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 40 [2021-07-13 19:35:06,704 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:35:06,722 INFO L628 ElimStorePlain]: treesize reduction 151, result has 6.8 percent of original size [2021-07-13 19:35:06,722 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:35:06,722 INFO L518 ElimStorePlain]: Eliminatee v_prenex_237 vanished before elimination [2021-07-13 19:35:06,722 INFO L518 ElimStorePlain]: Eliminatee v_prenex_238 vanished before elimination [2021-07-13 19:35:06,725 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:35:06,725 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:206, output treesize:11 [2021-07-13 19:35:06,762 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:35:06,762 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1898235493] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:35:06,762 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:35:06,762 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-07-13 19:35:06,762 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92146098] [2021-07-13 19:35:06,763 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 19:35:06,763 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:35:06,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 19:35:06,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=456, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:35:06,763 INFO L87 Difference]: Start difference. First operand 1304 states and 3759 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:35:07,663 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 57 [2021-07-13 19:35:07,982 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 74 [2021-07-13 19:35:08,323 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 98 [2021-07-13 19:35:08,578 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 98 [2021-07-13 19:35:08,931 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 43 [2021-07-13 19:35:08,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:35:08,947 INFO L93 Difference]: Finished difference Result 1362 states and 3871 transitions. [2021-07-13 19:35:08,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 19:35:08,948 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:35:08,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:35:08,950 INFO L225 Difference]: With dead ends: 1362 [2021-07-13 19:35:08,950 INFO L226 Difference]: Without dead ends: 1354 [2021-07-13 19:35:08,950 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 2873.4ms TimeCoverageRelationStatistics Valid=141, Invalid=1265, Unknown=0, NotChecked=0, Total=1406 [2021-07-13 19:35:08,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1354 states. [2021-07-13 19:35:08,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1354 to 1314. [2021-07-13 19:35:08,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1314 states, 1313 states have (on average 2.884996191926885) internal successors, (3788), 1313 states have internal predecessors, (3788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:35:08,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1314 states to 1314 states and 3788 transitions. [2021-07-13 19:35:08,965 INFO L78 Accepts]: Start accepts. Automaton has 1314 states and 3788 transitions. Word has length 18 [2021-07-13 19:35:08,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:35:08,965 INFO L482 AbstractCegarLoop]: Abstraction has 1314 states and 3788 transitions. [2021-07-13 19:35:08,965 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:35:08,965 INFO L276 IsEmpty]: Start isEmpty. Operand 1314 states and 3788 transitions. [2021-07-13 19:35:08,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:35:08,967 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:35:08,967 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:35:09,167 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 368 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2814 [2021-07-13 19:35:09,167 INFO L430 AbstractCegarLoop]: === Iteration 378 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:35:09,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:35:09,168 INFO L82 PathProgramCache]: Analyzing trace with hash 610654502, now seen corresponding path program 364 times [2021-07-13 19:35:09,168 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:35:09,168 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107043237] [2021-07-13 19:35:09,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:35:09,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:35:09,346 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:35:09,346 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:35:09,346 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107043237] [2021-07-13 19:35:09,346 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [107043237] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:35:09,346 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [764935544] [2021-07-13 19:35:09,346 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 369 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 369 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:35:09,374 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:35:09,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:35:09,375 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 53 conjunts are in the unsatisfiable core [2021-07-13 19:35:09,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:35:10,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:10,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:10,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:10,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:10,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:10,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:10,021 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:35:10,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:10,026 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:35:10,027 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 42 [2021-07-13 19:35:10,028 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:35:10,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:10,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:10,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:10,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:10,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:10,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:10,035 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:35:10,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:10,036 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 40 [2021-07-13 19:35:10,038 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:35:10,050 INFO L628 ElimStorePlain]: treesize reduction 112, result has 8.9 percent of original size [2021-07-13 19:35:10,050 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:35:10,050 INFO L518 ElimStorePlain]: Eliminatee v_prenex_246 vanished before elimination [2021-07-13 19:35:10,050 INFO L518 ElimStorePlain]: Eliminatee v_prenex_247 vanished before elimination [2021-07-13 19:35:10,050 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:35:10,050 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 6 variables, input treesize:206, output treesize:11 [2021-07-13 19:35:10,060 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:35:10,060 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [764935544] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:35:10,060 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:35:10,060 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-07-13 19:35:10,060 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451310068] [2021-07-13 19:35:10,060 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 19:35:10,060 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:35:10,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 19:35:10,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:35:10,061 INFO L87 Difference]: Start difference. First operand 1314 states and 3788 transitions. Second operand has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:35:11,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:35:11,074 INFO L93 Difference]: Finished difference Result 1470 states and 4103 transitions. [2021-07-13 19:35:11,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:35:11,074 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:35:11,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:35:11,077 INFO L225 Difference]: With dead ends: 1470 [2021-07-13 19:35:11,077 INFO L226 Difference]: Without dead ends: 1467 [2021-07-13 19:35:11,077 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 1167.6ms TimeCoverageRelationStatistics Valid=83, Invalid=673, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:35:11,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1467 states. [2021-07-13 19:35:11,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1467 to 1343. [2021-07-13 19:35:11,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1343 states, 1342 states have (on average 2.8934426229508197) internal successors, (3883), 1342 states have internal predecessors, (3883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:35:11,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1343 states to 1343 states and 3883 transitions. [2021-07-13 19:35:11,093 INFO L78 Accepts]: Start accepts. Automaton has 1343 states and 3883 transitions. Word has length 18 [2021-07-13 19:35:11,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:35:11,093 INFO L482 AbstractCegarLoop]: Abstraction has 1343 states and 3883 transitions. [2021-07-13 19:35:11,093 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:35:11,093 INFO L276 IsEmpty]: Start isEmpty. Operand 1343 states and 3883 transitions. [2021-07-13 19:35:11,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:35:11,094 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:35:11,094 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:35:11,304 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2831,369 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:35:11,305 INFO L430 AbstractCegarLoop]: === Iteration 379 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:35:11,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:35:11,305 INFO L82 PathProgramCache]: Analyzing trace with hash 1500373930, now seen corresponding path program 365 times [2021-07-13 19:35:11,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:35:11,305 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729971482] [2021-07-13 19:35:11,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:35:11,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:35:11,744 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:35:11,744 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:35:11,744 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729971482] [2021-07-13 19:35:11,744 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729971482] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:35:11,744 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [80376666] [2021-07-13 19:35:11,744 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 370 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 370 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:35:11,782 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:35:11,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:35:11,783 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 53 conjunts are in the unsatisfiable core [2021-07-13 19:35:11,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:35:12,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:12,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:12,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:12,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:12,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:12,510 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:35:12,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:12,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:12,515 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:35:12,517 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 40 [2021-07-13 19:35:12,519 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:35:12,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:12,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:12,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:12,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:12,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:12,525 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:35:12,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:12,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:12,527 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 42 [2021-07-13 19:35:12,528 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:35:12,541 INFO L628 ElimStorePlain]: treesize reduction 116, result has 8.7 percent of original size [2021-07-13 19:35:12,541 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:35:12,541 INFO L518 ElimStorePlain]: Eliminatee v_prenex_252 vanished before elimination [2021-07-13 19:35:12,541 INFO L518 ElimStorePlain]: Eliminatee v_prenex_253 vanished before elimination [2021-07-13 19:35:12,541 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:35:12,541 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 6 variables, input treesize:206, output treesize:11 [2021-07-13 19:35:12,573 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:35:12,573 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [80376666] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:35:12,573 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:35:12,573 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-07-13 19:35:12,573 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076409936] [2021-07-13 19:35:12,574 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 19:35:12,574 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:35:12,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 19:35:12,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=411, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:35:12,574 INFO L87 Difference]: Start difference. First operand 1343 states and 3883 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:35:13,308 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 74 [2021-07-13 19:35:13,657 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 77 [2021-07-13 19:35:13,936 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 77 [2021-07-13 19:35:14,189 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 78 [2021-07-13 19:35:14,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:35:14,377 INFO L93 Difference]: Finished difference Result 2052 states and 5791 transitions. [2021-07-13 19:35:14,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 19:35:14,378 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:35:14,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:35:14,381 INFO L225 Difference]: With dead ends: 2052 [2021-07-13 19:35:14,381 INFO L226 Difference]: Without dead ends: 2049 [2021-07-13 19:35:14,381 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 2207.1ms TimeCoverageRelationStatistics Valid=146, Invalid=1260, Unknown=0, NotChecked=0, Total=1406 [2021-07-13 19:35:14,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2049 states. [2021-07-13 19:35:14,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2049 to 1345. [2021-07-13 19:35:14,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1345 states, 1344 states have (on average 2.8921130952380953) internal successors, (3887), 1344 states have internal predecessors, (3887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:35:14,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1345 states to 1345 states and 3887 transitions. [2021-07-13 19:35:14,399 INFO L78 Accepts]: Start accepts. Automaton has 1345 states and 3887 transitions. Word has length 18 [2021-07-13 19:35:14,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:35:14,399 INFO L482 AbstractCegarLoop]: Abstraction has 1345 states and 3887 transitions. [2021-07-13 19:35:14,399 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:35:14,399 INFO L276 IsEmpty]: Start isEmpty. Operand 1345 states and 3887 transitions. [2021-07-13 19:35:14,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:35:14,400 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:35:14,400 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:35:14,616 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2848,370 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:35:14,617 INFO L430 AbstractCegarLoop]: === Iteration 380 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:35:14,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:35:14,617 INFO L82 PathProgramCache]: Analyzing trace with hash 1798426888, now seen corresponding path program 366 times [2021-07-13 19:35:14,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:35:14,617 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654949964] [2021-07-13 19:35:14,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:35:14,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:35:14,835 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:35:14,835 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:35:14,836 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654949964] [2021-07-13 19:35:14,836 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [654949964] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:35:14,836 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1615078602] [2021-07-13 19:35:14,836 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 371 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 371 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:35:14,864 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:35:14,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:35:14,865 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 53 conjunts are in the unsatisfiable core [2021-07-13 19:35:14,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:35:15,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:15,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:15,607 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:35:15,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:15,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:15,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:15,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:15,610 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 40 [2021-07-13 19:35:15,612 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:35:15,631 INFO L628 ElimStorePlain]: treesize reduction 155, result has 6.6 percent of original size [2021-07-13 19:35:15,632 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:35:15,632 INFO L518 ElimStorePlain]: Eliminatee v_prenex_258 vanished before elimination [2021-07-13 19:35:15,632 INFO L518 ElimStorePlain]: Eliminatee v_prenex_259 vanished before elimination [2021-07-13 19:35:15,632 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:35:15,632 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:206, output treesize:11 [2021-07-13 19:35:15,640 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:35:15,640 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1615078602] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:35:15,641 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:35:15,641 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-07-13 19:35:15,641 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87420496] [2021-07-13 19:35:15,641 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:35:15,641 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:35:15,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:35:15,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=371, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:35:15,641 INFO L87 Difference]: Start difference. First operand 1345 states and 3887 transitions. Second operand has 21 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:35:16,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:35:16,609 INFO L93 Difference]: Finished difference Result 1586 states and 4489 transitions. [2021-07-13 19:35:16,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 19:35:16,609 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:35:16,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:35:16,612 INFO L225 Difference]: With dead ends: 1586 [2021-07-13 19:35:16,612 INFO L226 Difference]: Without dead ends: 1583 [2021-07-13 19:35:16,612 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 1255.9ms TimeCoverageRelationStatistics Valid=105, Invalid=887, Unknown=0, NotChecked=0, Total=992 [2021-07-13 19:35:16,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1583 states. [2021-07-13 19:35:16,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1583 to 1345. [2021-07-13 19:35:16,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1345 states, 1344 states have (on average 2.8921130952380953) internal successors, (3887), 1344 states have internal predecessors, (3887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:35:16,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1345 states to 1345 states and 3887 transitions. [2021-07-13 19:35:16,628 INFO L78 Accepts]: Start accepts. Automaton has 1345 states and 3887 transitions. Word has length 18 [2021-07-13 19:35:16,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:35:16,628 INFO L482 AbstractCegarLoop]: Abstraction has 1345 states and 3887 transitions. [2021-07-13 19:35:16,628 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:35:16,628 INFO L276 IsEmpty]: Start isEmpty. Operand 1345 states and 3887 transitions. [2021-07-13 19:35:16,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:35:16,630 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:35:16,630 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:35:16,839 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 371 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2867 [2021-07-13 19:35:16,839 INFO L430 AbstractCegarLoop]: === Iteration 381 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:35:16,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:35:16,839 INFO L82 PathProgramCache]: Analyzing trace with hash 166479722, now seen corresponding path program 367 times [2021-07-13 19:35:16,839 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:35:16,839 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276809282] [2021-07-13 19:35:16,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:35:16,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:35:17,398 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:35:17,398 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:35:17,398 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276809282] [2021-07-13 19:35:17,399 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [276809282] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:35:17,399 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [220214027] [2021-07-13 19:35:17,399 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 372 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 372 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:35:17,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:35:17,427 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 53 conjunts are in the unsatisfiable core [2021-07-13 19:35:17,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:35:18,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:18,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:18,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:18,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:18,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:18,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:18,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:18,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:18,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:18,189 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:35:18,195 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:35:18,196 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 42 [2021-07-13 19:35:18,197 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:35:18,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:18,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:18,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:18,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:18,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:18,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:18,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:18,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:18,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:18,206 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:35:18,207 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 40 [2021-07-13 19:35:18,208 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:35:18,260 INFO L628 ElimStorePlain]: treesize reduction 95, result has 46.6 percent of original size [2021-07-13 19:35:18,262 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:35:18,263 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-13 19:35:18,263 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:35:18,278 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:35:18,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:18,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:18,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:18,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:18,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:18,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:18,289 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 27 [2021-07-13 19:35:18,291 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:35:18,300 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:35:18,300 INFO L518 ElimStorePlain]: Eliminatee v_prenex_265 vanished before elimination [2021-07-13 19:35:18,301 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:35:18,301 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:257, output treesize:22 [2021-07-13 19:35:18,341 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:35:18,341 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [220214027] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:35:18,341 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:35:18,341 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-07-13 19:35:18,341 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744843047] [2021-07-13 19:35:18,342 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 19:35:18,342 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:35:18,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 19:35:18,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=458, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:35:18,342 INFO L87 Difference]: Start difference. First operand 1345 states and 3887 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:35:19,175 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 73 [2021-07-13 19:35:19,345 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 68 [2021-07-13 19:35:19,575 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 72 [2021-07-13 19:35:19,771 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 85 [2021-07-13 19:35:20,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:35:20,434 INFO L93 Difference]: Finished difference Result 1603 states and 4518 transitions. [2021-07-13 19:35:20,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-13 19:35:20,434 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:35:20,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:35:20,437 INFO L225 Difference]: With dead ends: 1603 [2021-07-13 19:35:20,437 INFO L226 Difference]: Without dead ends: 1594 [2021-07-13 19:35:20,437 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 2547.1ms TimeCoverageRelationStatistics Valid=127, Invalid=1279, Unknown=0, NotChecked=0, Total=1406 [2021-07-13 19:35:20,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1594 states. [2021-07-13 19:35:20,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1594 to 1353. [2021-07-13 19:35:20,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1353 states, 1352 states have (on average 2.8920118343195265) internal successors, (3910), 1352 states have internal predecessors, (3910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:35:20,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1353 states to 1353 states and 3910 transitions. [2021-07-13 19:35:20,454 INFO L78 Accepts]: Start accepts. Automaton has 1353 states and 3910 transitions. Word has length 18 [2021-07-13 19:35:20,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:35:20,454 INFO L482 AbstractCegarLoop]: Abstraction has 1353 states and 3910 transitions. [2021-07-13 19:35:20,454 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:35:20,454 INFO L276 IsEmpty]: Start isEmpty. Operand 1353 states and 3910 transitions. [2021-07-13 19:35:20,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:35:20,456 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:35:20,456 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:35:20,656 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2886,372 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:35:20,656 INFO L430 AbstractCegarLoop]: === Iteration 382 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:35:20,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:35:20,657 INFO L82 PathProgramCache]: Analyzing trace with hash -994542392, now seen corresponding path program 368 times [2021-07-13 19:35:20,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:35:20,657 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626387336] [2021-07-13 19:35:20,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:35:20,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:35:21,016 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:35:21,016 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:35:21,016 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626387336] [2021-07-13 19:35:21,017 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1626387336] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:35:21,017 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1871280436] [2021-07-13 19:35:21,017 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 373 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 373 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:35:21,044 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:35:21,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:35:21,046 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 57 conjunts are in the unsatisfiable core [2021-07-13 19:35:21,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:35:21,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:21,717 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:35:21,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:21,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:21,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:21,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:21,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:21,721 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:35:21,725 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 42 [2021-07-13 19:35:21,727 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:35:21,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:21,730 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:35:21,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:21,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:21,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:21,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:21,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:21,734 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 40 [2021-07-13 19:35:21,735 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:35:21,748 INFO L628 ElimStorePlain]: treesize reduction 110, result has 9.1 percent of original size [2021-07-13 19:35:21,748 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:35:21,748 INFO L518 ElimStorePlain]: Eliminatee v_prenex_267 vanished before elimination [2021-07-13 19:35:21,748 INFO L518 ElimStorePlain]: Eliminatee v_prenex_268 vanished before elimination [2021-07-13 19:35:21,749 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:35:21,749 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 6 variables, input treesize:206, output treesize:11 [2021-07-13 19:35:21,776 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:35:21,776 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1871280436] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:35:21,776 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:35:21,776 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-07-13 19:35:21,777 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085081763] [2021-07-13 19:35:21,777 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 19:35:21,777 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:35:21,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 19:35:21,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:35:21,777 INFO L87 Difference]: Start difference. First operand 1353 states and 3910 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:35:23,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:35:23,237 INFO L93 Difference]: Finished difference Result 1627 states and 4563 transitions. [2021-07-13 19:35:23,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-13 19:35:23,237 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:35:23,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:35:23,240 INFO L225 Difference]: With dead ends: 1627 [2021-07-13 19:35:23,241 INFO L226 Difference]: Without dead ends: 1618 [2021-07-13 19:35:23,241 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 1671.5ms TimeCoverageRelationStatistics Valid=150, Invalid=1110, Unknown=0, NotChecked=0, Total=1260 [2021-07-13 19:35:23,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1618 states. [2021-07-13 19:35:23,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1618 to 1349. [2021-07-13 19:35:23,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1349 states, 1348 states have (on average 2.8939169139465877) internal successors, (3901), 1348 states have internal predecessors, (3901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:35:23,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1349 states to 1349 states and 3901 transitions. [2021-07-13 19:35:23,256 INFO L78 Accepts]: Start accepts. Automaton has 1349 states and 3901 transitions. Word has length 18 [2021-07-13 19:35:23,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:35:23,256 INFO L482 AbstractCegarLoop]: Abstraction has 1349 states and 3901 transitions. [2021-07-13 19:35:23,256 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:35:23,256 INFO L276 IsEmpty]: Start isEmpty. Operand 1349 states and 3901 transitions. [2021-07-13 19:35:23,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:35:23,258 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:35:23,258 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:35:23,460 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2906,373 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:35:23,461 INFO L430 AbstractCegarLoop]: === Iteration 383 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:35:23,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:35:23,461 INFO L82 PathProgramCache]: Analyzing trace with hash -754900054, now seen corresponding path program 369 times [2021-07-13 19:35:23,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:35:23,461 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925452549] [2021-07-13 19:35:23,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:35:23,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:35:23,741 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:35:23,741 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:35:23,742 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925452549] [2021-07-13 19:35:23,742 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1925452549] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:35:23,742 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [183954426] [2021-07-13 19:35:23,742 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 374 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 374 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:35:23,772 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 19:35:23,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:35:23,773 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 57 conjunts are in the unsatisfiable core [2021-07-13 19:35:23,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:35:24,530 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 55 [2021-07-13 19:35:24,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:24,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:24,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:24,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:24,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:24,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:24,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:24,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:24,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:24,692 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:35:24,699 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:35:24,699 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 42 [2021-07-13 19:35:24,701 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:35:24,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:24,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:24,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:24,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:24,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:24,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:24,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:24,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:24,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:24,711 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:35:24,712 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 40 [2021-07-13 19:35:24,713 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:35:24,775 INFO L628 ElimStorePlain]: treesize reduction 174, result has 33.8 percent of original size [2021-07-13 19:35:24,775 INFO L518 ElimStorePlain]: Eliminatee array_0 vanished before elimination [2021-07-13 19:35:24,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:24,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:24,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:24,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:24,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:24,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:24,781 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 27 [2021-07-13 19:35:24,783 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:35:24,797 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:35:24,798 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:35:24,798 INFO L518 ElimStorePlain]: Eliminatee v_prenex_273 vanished before elimination [2021-07-13 19:35:24,800 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:35:24,800 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-13 19:35:24,801 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-13 19:35:24,815 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:35:24,817 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 6 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:35:24,817 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 9 variables, input treesize:352, output treesize:31 [2021-07-13 19:35:24,853 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:35:24,853 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [183954426] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:35:24,853 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:35:24,853 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-07-13 19:35:24,853 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605539864] [2021-07-13 19:35:24,854 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 19:35:24,854 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:35:24,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 19:35:24,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=438, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:35:24,854 INFO L87 Difference]: Start difference. First operand 1349 states and 3901 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:35:25,930 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 64 [2021-07-13 19:35:26,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:35:26,122 INFO L93 Difference]: Finished difference Result 1668 states and 4648 transitions. [2021-07-13 19:35:26,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 19:35:26,123 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:35:26,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:35:26,126 INFO L225 Difference]: With dead ends: 1668 [2021-07-13 19:35:26,126 INFO L226 Difference]: Without dead ends: 1661 [2021-07-13 19:35:26,126 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 1718.9ms TimeCoverageRelationStatistics Valid=148, Invalid=974, Unknown=0, NotChecked=0, Total=1122 [2021-07-13 19:35:26,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1661 states. [2021-07-13 19:35:26,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1661 to 1359. [2021-07-13 19:35:26,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1359 states, 1358 states have (on average 2.901325478645066) internal successors, (3940), 1358 states have internal predecessors, (3940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:35:26,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1359 states to 1359 states and 3940 transitions. [2021-07-13 19:35:26,142 INFO L78 Accepts]: Start accepts. Automaton has 1359 states and 3940 transitions. Word has length 18 [2021-07-13 19:35:26,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:35:26,142 INFO L482 AbstractCegarLoop]: Abstraction has 1359 states and 3940 transitions. [2021-07-13 19:35:26,142 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:35:26,143 INFO L276 IsEmpty]: Start isEmpty. Operand 1359 states and 3940 transitions. [2021-07-13 19:35:26,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:35:26,144 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:35:26,144 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:35:26,346 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 374 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2925 [2021-07-13 19:35:26,347 INFO L430 AbstractCegarLoop]: === Iteration 384 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:35:26,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:35:26,347 INFO L82 PathProgramCache]: Analyzing trace with hash -747169656, now seen corresponding path program 370 times [2021-07-13 19:35:26,347 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:35:26,347 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141613723] [2021-07-13 19:35:26,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:35:26,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:35:26,573 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:35:26,574 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:35:26,574 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141613723] [2021-07-13 19:35:26,574 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [141613723] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:35:26,574 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [223881896] [2021-07-13 19:35:26,574 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 375 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 375 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:35:26,622 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:35:26,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:35:26,624 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 53 conjunts are in the unsatisfiable core [2021-07-13 19:35:26,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:35:27,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:27,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:27,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:27,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:27,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:27,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:27,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:27,281 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:35:27,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:27,287 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:35:27,288 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 40 [2021-07-13 19:35:27,290 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:35:27,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:27,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:27,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:27,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:27,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:27,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:27,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:27,298 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:35:27,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:27,324 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:35:27,325 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 38 [2021-07-13 19:35:27,327 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:35:27,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:27,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:27,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:27,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:27,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:27,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:27,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:27,334 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:35:27,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:27,335 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 38 [2021-07-13 19:35:27,336 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:35:27,369 INFO L628 ElimStorePlain]: treesize reduction 76, result has 12.6 percent of original size [2021-07-13 19:35:27,369 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:35:27,370 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:35:27,370 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:194, output treesize:11 [2021-07-13 19:35:27,399 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:35:27,399 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [223881896] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:35:27,399 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:35:27,400 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-07-13 19:35:27,400 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164410651] [2021-07-13 19:35:27,400 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:35:27,400 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:35:27,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:35:27,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=371, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:35:27,400 INFO L87 Difference]: Start difference. First operand 1359 states and 3940 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:35:28,286 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 40 [2021-07-13 19:35:29,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:35:29,035 INFO L93 Difference]: Finished difference Result 1670 states and 4656 transitions. [2021-07-13 19:35:29,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-13 19:35:29,037 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:35:29,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:35:29,039 INFO L225 Difference]: With dead ends: 1670 [2021-07-13 19:35:29,039 INFO L226 Difference]: Without dead ends: 1666 [2021-07-13 19:35:29,040 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 323 ImplicationChecksByTransitivity, 1761.2ms TimeCoverageRelationStatistics Valid=167, Invalid=1393, Unknown=0, NotChecked=0, Total=1560 [2021-07-13 19:35:29,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1666 states. [2021-07-13 19:35:29,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1666 to 1322. [2021-07-13 19:35:29,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1322 states, 1321 states have (on average 2.9084027252081754) internal successors, (3842), 1321 states have internal predecessors, (3842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:35:29,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1322 states to 1322 states and 3842 transitions. [2021-07-13 19:35:29,056 INFO L78 Accepts]: Start accepts. Automaton has 1322 states and 3842 transitions. Word has length 18 [2021-07-13 19:35:29,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:35:29,056 INFO L482 AbstractCegarLoop]: Abstraction has 1322 states and 3842 transitions. [2021-07-13 19:35:29,057 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:35:29,057 INFO L276 IsEmpty]: Start isEmpty. Operand 1322 states and 3842 transitions. [2021-07-13 19:35:29,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:35:29,058 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:35:29,058 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:35:29,260 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2965,375 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:35:29,260 INFO L430 AbstractCegarLoop]: === Iteration 385 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:35:29,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:35:29,260 INFO L82 PathProgramCache]: Analyzing trace with hash -806597504, now seen corresponding path program 371 times [2021-07-13 19:35:29,260 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:35:29,261 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756329870] [2021-07-13 19:35:29,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:35:29,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:35:29,658 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:35:29,659 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:35:29,659 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756329870] [2021-07-13 19:35:29,659 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1756329870] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:35:29,659 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2119935439] [2021-07-13 19:35:29,659 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 376 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 376 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:35:29,687 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:35:29,688 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:35:29,689 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 53 conjunts are in the unsatisfiable core [2021-07-13 19:35:29,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:35:30,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:30,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:30,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:30,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:30,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:30,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:30,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:30,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:30,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:30,366 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:35:30,372 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:35:30,373 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 40 [2021-07-13 19:35:30,374 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:35:30,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:30,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:30,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:30,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:30,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:30,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:30,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:30,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:30,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:30,383 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:35:30,383 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 42 [2021-07-13 19:35:30,385 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:35:30,397 INFO L628 ElimStorePlain]: treesize reduction 110, result has 9.1 percent of original size [2021-07-13 19:35:30,397 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:35:30,397 INFO L518 ElimStorePlain]: Eliminatee v_prenex_277 vanished before elimination [2021-07-13 19:35:30,397 INFO L518 ElimStorePlain]: Eliminatee v_prenex_278 vanished before elimination [2021-07-13 19:35:30,398 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:35:30,398 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 6 variables, input treesize:206, output treesize:11 [2021-07-13 19:35:30,425 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:35:30,425 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2119935439] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:35:30,425 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:35:30,425 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-07-13 19:35:30,426 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286086290] [2021-07-13 19:35:30,426 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 19:35:30,426 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:35:30,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 19:35:30,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=409, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:35:30,426 INFO L87 Difference]: Start difference. First operand 1322 states and 3842 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:35:31,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:35:31,308 INFO L93 Difference]: Finished difference Result 1425 states and 4085 transitions. [2021-07-13 19:35:31,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 19:35:31,308 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:35:31,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:35:31,311 INFO L225 Difference]: With dead ends: 1425 [2021-07-13 19:35:31,311 INFO L226 Difference]: Without dead ends: 1418 [2021-07-13 19:35:31,311 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 1224.7ms TimeCoverageRelationStatistics Valid=103, Invalid=827, Unknown=0, NotChecked=0, Total=930 [2021-07-13 19:35:31,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1418 states. [2021-07-13 19:35:31,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1418 to 1325. [2021-07-13 19:35:31,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1325 states, 1324 states have (on average 2.906344410876133) internal successors, (3848), 1324 states have internal predecessors, (3848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:35:31,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1325 states to 1325 states and 3848 transitions. [2021-07-13 19:35:31,325 INFO L78 Accepts]: Start accepts. Automaton has 1325 states and 3848 transitions. Word has length 18 [2021-07-13 19:35:31,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:35:31,325 INFO L482 AbstractCegarLoop]: Abstraction has 1325 states and 3848 transitions. [2021-07-13 19:35:31,325 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:35:31,326 INFO L276 IsEmpty]: Start isEmpty. Operand 1325 states and 3848 transitions. [2021-07-13 19:35:31,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:35:31,327 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:35:31,327 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:35:31,528 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 376 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2995 [2021-07-13 19:35:31,529 INFO L430 AbstractCegarLoop]: === Iteration 386 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:35:31,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:35:31,529 INFO L82 PathProgramCache]: Analyzing trace with hash 695400512, now seen corresponding path program 372 times [2021-07-13 19:35:31,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:35:31,529 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141331325] [2021-07-13 19:35:31,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:35:31,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:35:31,806 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:35:31,807 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:35:31,807 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141331325] [2021-07-13 19:35:31,807 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [141331325] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:35:31,807 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [221223880] [2021-07-13 19:35:31,807 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 377 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 377 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:35:31,837 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:35:31,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:35:31,838 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 57 conjunts are in the unsatisfiable core [2021-07-13 19:35:31,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:35:32,431 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 55 [2021-07-13 19:35:32,638 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 171 DAG size of output: 93 [2021-07-13 19:35:32,774 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:35:32,774 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:35:32,788 INFO L628 ElimStorePlain]: treesize reduction 277, result has 3.8 percent of original size [2021-07-13 19:35:32,789 INFO L518 ElimStorePlain]: Eliminatee v_prenex_291 vanished before elimination [2021-07-13 19:35:32,789 INFO L518 ElimStorePlain]: Eliminatee v_prenex_292 vanished before elimination [2021-07-13 19:35:32,789 INFO L518 ElimStorePlain]: Eliminatee array_0 vanished before elimination [2021-07-13 19:35:32,789 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:35:32,789 INFO L518 ElimStorePlain]: Eliminatee v_prenex_284 vanished before elimination [2021-07-13 19:35:32,789 INFO L518 ElimStorePlain]: Eliminatee v_prenex_285 vanished before elimination [2021-07-13 19:35:32,789 INFO L518 ElimStorePlain]: Eliminatee v_prenex_286 vanished before elimination [2021-07-13 19:35:32,789 INFO L518 ElimStorePlain]: Eliminatee v_prenex_287 vanished before elimination [2021-07-13 19:35:32,789 INFO L518 ElimStorePlain]: Eliminatee v_prenex_289 vanished before elimination [2021-07-13 19:35:32,790 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 10 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:35:32,790 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 15 variables, input treesize:360, output treesize:11 [2021-07-13 19:35:32,798 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:35:32,798 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [221223880] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:35:32,798 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:35:32,798 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-07-13 19:35:32,798 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433289332] [2021-07-13 19:35:32,798 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 19:35:32,798 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:35:32,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 19:35:32,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:35:32,799 INFO L87 Difference]: Start difference. First operand 1325 states and 3848 transitions. Second operand has 22 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 22 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:35:33,702 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 63 [2021-07-13 19:35:33,884 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 101 [2021-07-13 19:35:33,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:35:33,964 INFO L93 Difference]: Finished difference Result 1437 states and 4095 transitions. [2021-07-13 19:35:33,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 19:35:33,964 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 22 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:35:33,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:35:33,967 INFO L225 Difference]: With dead ends: 1437 [2021-07-13 19:35:33,967 INFO L226 Difference]: Without dead ends: 1432 [2021-07-13 19:35:33,967 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 1671.0ms TimeCoverageRelationStatistics Valid=129, Invalid=863, Unknown=0, NotChecked=0, Total=992 [2021-07-13 19:35:33,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1432 states. [2021-07-13 19:35:33,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1432 to 1325. [2021-07-13 19:35:33,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1325 states, 1324 states have (on average 2.906344410876133) internal successors, (3848), 1324 states have internal predecessors, (3848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:35:33,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1325 states to 1325 states and 3848 transitions. [2021-07-13 19:35:33,981 INFO L78 Accepts]: Start accepts. Automaton has 1325 states and 3848 transitions. Word has length 18 [2021-07-13 19:35:33,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:35:33,981 INFO L482 AbstractCegarLoop]: Abstraction has 1325 states and 3848 transitions. [2021-07-13 19:35:33,981 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 22 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:35:33,981 INFO L276 IsEmpty]: Start isEmpty. Operand 1325 states and 3848 transitions. [2021-07-13 19:35:33,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:35:33,983 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:35:33,983 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:35:34,183 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3015,377 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:35:34,183 INFO L430 AbstractCegarLoop]: === Iteration 387 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:35:34,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:35:34,184 INFO L82 PathProgramCache]: Analyzing trace with hash 935042850, now seen corresponding path program 373 times [2021-07-13 19:35:34,184 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:35:34,184 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179836222] [2021-07-13 19:35:34,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:35:34,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:35:34,390 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:35:34,390 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:35:34,390 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179836222] [2021-07-13 19:35:34,390 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [179836222] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:35:34,390 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1598544262] [2021-07-13 19:35:34,390 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 378 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 378 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:35:34,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:35:34,424 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 53 conjunts are in the unsatisfiable core [2021-07-13 19:35:34,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:35:35,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:35,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:35,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:35,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:35,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:35,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:35,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:35,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:35,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:35,105 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:35:35,111 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:35:35,111 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 40 [2021-07-13 19:35:35,114 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:35:35,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:35,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:35,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:35,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:35,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:35,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:35,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:35,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:35,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:35,123 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:35:35,123 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 42 [2021-07-13 19:35:35,124 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:35:35,137 INFO L628 ElimStorePlain]: treesize reduction 106, result has 9.4 percent of original size [2021-07-13 19:35:35,137 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:35:35,137 INFO L518 ElimStorePlain]: Eliminatee v_prenex_295 vanished before elimination [2021-07-13 19:35:35,137 INFO L518 ElimStorePlain]: Eliminatee v_prenex_296 vanished before elimination [2021-07-13 19:35:35,138 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:35:35,138 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 6 variables, input treesize:206, output treesize:11 [2021-07-13 19:35:35,170 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:35:35,170 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1598544262] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:35:35,170 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:35:35,170 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-07-13 19:35:35,170 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188466873] [2021-07-13 19:35:35,171 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 19:35:35,171 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:35:35,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 19:35:35,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:35:35,171 INFO L87 Difference]: Start difference. First operand 1325 states and 3848 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:35:36,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:35:36,212 INFO L93 Difference]: Finished difference Result 1489 states and 4198 transitions. [2021-07-13 19:35:36,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 19:35:36,213 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:35:36,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:35:36,215 INFO L225 Difference]: With dead ends: 1489 [2021-07-13 19:35:36,215 INFO L226 Difference]: Without dead ends: 1485 [2021-07-13 19:35:36,215 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 1328.8ms TimeCoverageRelationStatistics Valid=129, Invalid=863, Unknown=0, NotChecked=0, Total=992 [2021-07-13 19:35:36,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1485 states. [2021-07-13 19:35:36,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1485 to 1342. [2021-07-13 19:35:36,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1342 states, 1341 states have (on average 2.9157345264727814) internal successors, (3910), 1341 states have internal predecessors, (3910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:35:36,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1342 states to 1342 states and 3910 transitions. [2021-07-13 19:35:36,237 INFO L78 Accepts]: Start accepts. Automaton has 1342 states and 3910 transitions. Word has length 18 [2021-07-13 19:35:36,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:35:36,238 INFO L482 AbstractCegarLoop]: Abstraction has 1342 states and 3910 transitions. [2021-07-13 19:35:36,238 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:35:36,238 INFO L276 IsEmpty]: Start isEmpty. Operand 1342 states and 3910 transitions. [2021-07-13 19:35:36,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:35:36,239 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:35:36,239 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:35:36,439 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3035,378 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:35:36,440 INFO L430 AbstractCegarLoop]: === Iteration 388 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:35:36,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:35:36,440 INFO L82 PathProgramCache]: Analyzing trace with hash 942773248, now seen corresponding path program 374 times [2021-07-13 19:35:36,440 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:35:36,440 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100208802] [2021-07-13 19:35:36,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:35:36,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:35:36,628 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:35:36,628 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:35:36,628 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100208802] [2021-07-13 19:35:36,628 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2100208802] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:35:36,628 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1619015031] [2021-07-13 19:35:36,628 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 379 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 379 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:35:36,656 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:35:36,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:35:36,657 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 57 conjunts are in the unsatisfiable core [2021-07-13 19:35:36,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:35:37,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:37,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:37,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:37,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:37,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:37,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:37,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:37,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:37,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:37,301 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:35:37,307 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:35:37,307 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 40 [2021-07-13 19:35:37,309 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:35:37,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:37,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:37,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:37,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:37,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:37,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:37,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:37,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:37,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:37,318 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:35:37,324 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:35:37,324 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 48 [2021-07-13 19:35:37,326 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:35:37,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:37,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:37,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:37,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:37,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:37,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:37,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:37,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:37,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:37,340 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:35:37,345 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:35:37,346 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 32 [2021-07-13 19:35:37,348 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:35:37,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:37,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:37,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:37,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:37,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:37,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:37,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:37,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:37,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:37,361 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:35:37,362 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 40 [2021-07-13 19:35:37,364 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:35:37,430 INFO L628 ElimStorePlain]: treesize reduction 109, result has 40.1 percent of original size [2021-07-13 19:35:37,432 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:35:37,433 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-13 19:35:37,434 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-13 19:35:37,464 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:35:37,465 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:35:37,466 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:345, output treesize:56 [2021-07-13 19:35:37,574 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:35:37,574 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1619015031] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:35:37,574 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:35:37,574 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-07-13 19:35:37,574 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241640339] [2021-07-13 19:35:37,575 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 19:35:37,575 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:35:37,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 19:35:37,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:35:37,575 INFO L87 Difference]: Start difference. First operand 1342 states and 3910 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:35:38,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:35:38,501 INFO L93 Difference]: Finished difference Result 1512 states and 4276 transitions. [2021-07-13 19:35:38,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-13 19:35:38,501 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:35:38,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:35:38,503 INFO L225 Difference]: With dead ends: 1512 [2021-07-13 19:35:38,503 INFO L226 Difference]: Without dead ends: 1506 [2021-07-13 19:35:38,504 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 1218.2ms TimeCoverageRelationStatistics Valid=125, Invalid=931, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 19:35:38,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1506 states. [2021-07-13 19:35:38,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1506 to 1337. [2021-07-13 19:35:38,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1337 states, 1336 states have (on average 2.9154191616766467) internal successors, (3895), 1336 states have internal predecessors, (3895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:35:38,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1337 states to 1337 states and 3895 transitions. [2021-07-13 19:35:38,519 INFO L78 Accepts]: Start accepts. Automaton has 1337 states and 3895 transitions. Word has length 18 [2021-07-13 19:35:38,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:35:38,519 INFO L482 AbstractCegarLoop]: Abstraction has 1337 states and 3895 transitions. [2021-07-13 19:35:38,519 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:35:38,519 INFO L276 IsEmpty]: Start isEmpty. Operand 1337 states and 3895 transitions. [2021-07-13 19:35:38,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:35:38,520 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:35:38,520 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:35:38,721 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3054,379 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:35:38,722 INFO L430 AbstractCegarLoop]: === Iteration 389 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:35:38,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:35:38,722 INFO L82 PathProgramCache]: Analyzing trace with hash -1995645530, now seen corresponding path program 375 times [2021-07-13 19:35:38,722 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:35:38,722 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927483153] [2021-07-13 19:35:38,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:35:38,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:35:39,273 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:35:39,273 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:35:39,273 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927483153] [2021-07-13 19:35:39,273 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1927483153] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:35:39,273 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1872835626] [2021-07-13 19:35:39,273 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 380 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 380 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:35:39,301 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:35:39,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:35:39,303 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 53 conjunts are in the unsatisfiable core [2021-07-13 19:35:39,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:35:40,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:40,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:40,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:40,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:40,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:40,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:40,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:40,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:40,136 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:35:40,142 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:35:40,142 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 42 [2021-07-13 19:35:40,145 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:35:40,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:40,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:40,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:40,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:40,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:40,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:40,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:40,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:40,154 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:35:40,155 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 40 [2021-07-13 19:35:40,156 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:35:40,200 INFO L628 ElimStorePlain]: treesize reduction 95, result has 46.6 percent of original size [2021-07-13 19:35:40,203 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:35:40,203 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-13 19:35:40,204 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:35:40,225 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:35:40,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:40,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:40,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:40,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:40,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:40,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:40,231 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 27 [2021-07-13 19:35:40,233 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:35:40,242 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:35:40,243 INFO L518 ElimStorePlain]: Eliminatee v_prenex_303 vanished before elimination [2021-07-13 19:35:40,251 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:35:40,251 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:257, output treesize:22 [2021-07-13 19:35:40,298 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:35:40,298 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1872835626] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:35:40,298 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:35:40,298 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-07-13 19:35:40,298 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294412415] [2021-07-13 19:35:40,299 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 19:35:40,299 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:35:40,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 19:35:40,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=458, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:35:40,299 INFO L87 Difference]: Start difference. First operand 1337 states and 3895 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:35:41,604 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 67 [2021-07-13 19:35:42,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:35:42,328 INFO L93 Difference]: Finished difference Result 1452 states and 4160 transitions. [2021-07-13 19:35:42,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-13 19:35:42,328 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:35:42,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:35:42,330 INFO L225 Difference]: With dead ends: 1452 [2021-07-13 19:35:42,331 INFO L226 Difference]: Without dead ends: 1439 [2021-07-13 19:35:42,331 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 2616.7ms TimeCoverageRelationStatistics Valid=143, Invalid=1339, Unknown=0, NotChecked=0, Total=1482 [2021-07-13 19:35:42,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1439 states. [2021-07-13 19:35:42,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1439 to 1339. [2021-07-13 19:35:42,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1339 states, 1338 states have (on average 2.914050822122571) internal successors, (3899), 1338 states have internal predecessors, (3899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:35:42,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1339 states to 1339 states and 3899 transitions. [2021-07-13 19:35:42,346 INFO L78 Accepts]: Start accepts. Automaton has 1339 states and 3899 transitions. Word has length 18 [2021-07-13 19:35:42,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:35:42,346 INFO L482 AbstractCegarLoop]: Abstraction has 1339 states and 3899 transitions. [2021-07-13 19:35:42,346 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:35:42,346 INFO L276 IsEmpty]: Start isEmpty. Operand 1339 states and 3899 transitions. [2021-07-13 19:35:42,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:35:42,347 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:35:42,347 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:35:42,548 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 380 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3076 [2021-07-13 19:35:42,548 INFO L430 AbstractCegarLoop]: === Iteration 390 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:35:42,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:35:42,548 INFO L82 PathProgramCache]: Analyzing trace with hash 44208064, now seen corresponding path program 376 times [2021-07-13 19:35:42,548 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:35:42,548 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470297514] [2021-07-13 19:35:42,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:35:42,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:35:42,955 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:35:42,956 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:35:42,956 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470297514] [2021-07-13 19:35:42,956 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1470297514] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:35:42,956 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [427973874] [2021-07-13 19:35:42,956 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 381 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 381 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:35:42,985 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:35:42,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:35:42,986 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 53 conjunts are in the unsatisfiable core [2021-07-13 19:35:42,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:35:43,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:43,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:43,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:43,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:43,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:43,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:43,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:43,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:43,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:43,672 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:35:43,678 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:35:43,679 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 40 [2021-07-13 19:35:43,680 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:35:43,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:43,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:43,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:43,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:43,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:43,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:43,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:43,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:43,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:43,690 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:35:43,690 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 42 [2021-07-13 19:35:43,692 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:35:43,704 INFO L628 ElimStorePlain]: treesize reduction 110, result has 9.1 percent of original size [2021-07-13 19:35:43,704 INFO L518 ElimStorePlain]: Eliminatee v_prenex_308 vanished before elimination [2021-07-13 19:35:43,704 INFO L518 ElimStorePlain]: Eliminatee v_prenex_309 vanished before elimination [2021-07-13 19:35:43,704 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:35:43,704 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:35:43,704 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 6 variables, input treesize:206, output treesize:11 [2021-07-13 19:35:43,731 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:35:43,731 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [427973874] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:35:43,731 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:35:43,731 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-07-13 19:35:43,731 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314020701] [2021-07-13 19:35:43,731 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:35:43,731 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:35:43,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:35:43,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:35:43,731 INFO L87 Difference]: Start difference. First operand 1339 states and 3899 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:35:44,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:35:44,898 INFO L93 Difference]: Finished difference Result 1529 states and 4308 transitions. [2021-07-13 19:35:44,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 19:35:44,898 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:35:44,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:35:44,901 INFO L225 Difference]: With dead ends: 1529 [2021-07-13 19:35:44,901 INFO L226 Difference]: Without dead ends: 1514 [2021-07-13 19:35:44,901 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 1740.8ms TimeCoverageRelationStatistics Valid=158, Invalid=1032, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 19:35:44,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1514 states. [2021-07-13 19:35:44,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1514 to 1367. [2021-07-13 19:35:44,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1367 states, 1366 states have (on average 2.9128843338213763) internal successors, (3979), 1366 states have internal predecessors, (3979), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:35:44,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1367 states to 1367 states and 3979 transitions. [2021-07-13 19:35:44,916 INFO L78 Accepts]: Start accepts. Automaton has 1367 states and 3979 transitions. Word has length 18 [2021-07-13 19:35:44,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:35:44,916 INFO L482 AbstractCegarLoop]: Abstraction has 1367 states and 3979 transitions. [2021-07-13 19:35:44,916 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:35:44,916 INFO L276 IsEmpty]: Start isEmpty. Operand 1367 states and 3979 transitions. [2021-07-13 19:35:44,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:35:44,918 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:35:44,918 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:35:45,118 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 381 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3096 [2021-07-13 19:35:45,118 INFO L430 AbstractCegarLoop]: === Iteration 391 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:35:45,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:35:45,118 INFO L82 PathProgramCache]: Analyzing trace with hash 1356935782, now seen corresponding path program 377 times [2021-07-13 19:35:45,118 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:35:45,119 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392591034] [2021-07-13 19:35:45,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:35:45,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:35:45,396 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:35:45,396 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:35:45,396 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392591034] [2021-07-13 19:35:45,397 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1392591034] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:35:45,397 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1993687526] [2021-07-13 19:35:45,397 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 382 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 382 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:35:45,425 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:35:45,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:35:45,426 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 53 conjunts are in the unsatisfiable core [2021-07-13 19:35:45,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:35:46,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:46,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:46,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:46,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:46,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:46,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:46,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:46,161 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:35:46,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:46,167 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:35:46,168 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 38 [2021-07-13 19:35:46,170 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:35:46,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:46,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:46,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:46,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:46,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:46,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:46,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:46,177 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:35:46,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:46,178 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 40 [2021-07-13 19:35:46,180 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:35:46,192 INFO L628 ElimStorePlain]: treesize reduction 112, result has 8.9 percent of original size [2021-07-13 19:35:46,192 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:35:46,192 INFO L518 ElimStorePlain]: Eliminatee v_prenex_311 vanished before elimination [2021-07-13 19:35:46,192 INFO L518 ElimStorePlain]: Eliminatee v_prenex_312 vanished before elimination [2021-07-13 19:35:46,193 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:35:46,193 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 6 variables, input treesize:194, output treesize:11 [2021-07-13 19:35:46,219 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:35:46,219 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1993687526] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:35:46,219 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:35:46,219 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-07-13 19:35:46,219 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724224015] [2021-07-13 19:35:46,219 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:35:46,219 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:35:46,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:35:46,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:35:46,220 INFO L87 Difference]: Start difference. First operand 1367 states and 3979 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:35:47,497 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 57 [2021-07-13 19:35:47,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:35:47,643 INFO L93 Difference]: Finished difference Result 1527 states and 4324 transitions. [2021-07-13 19:35:47,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 19:35:47,643 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:35:47,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:35:47,645 INFO L225 Difference]: With dead ends: 1527 [2021-07-13 19:35:47,645 INFO L226 Difference]: Without dead ends: 1524 [2021-07-13 19:35:47,645 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 1841.7ms TimeCoverageRelationStatistics Valid=164, Invalid=1168, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 19:35:47,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1524 states. [2021-07-13 19:35:47,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1524 to 1398. [2021-07-13 19:35:47,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1398 states, 1397 states have (on average 2.9098067287043663) internal successors, (4065), 1397 states have internal predecessors, (4065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:35:47,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1398 states to 1398 states and 4065 transitions. [2021-07-13 19:35:47,660 INFO L78 Accepts]: Start accepts. Automaton has 1398 states and 4065 transitions. Word has length 18 [2021-07-13 19:35:47,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:35:47,660 INFO L482 AbstractCegarLoop]: Abstraction has 1398 states and 4065 transitions. [2021-07-13 19:35:47,660 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:35:47,660 INFO L276 IsEmpty]: Start isEmpty. Operand 1398 states and 4065 transitions. [2021-07-13 19:35:47,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:35:47,662 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:35:47,662 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:35:47,862 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3116,382 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:35:47,862 INFO L430 AbstractCegarLoop]: === Iteration 392 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:35:47,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:35:47,862 INFO L82 PathProgramCache]: Analyzing trace with hash -124738816, now seen corresponding path program 378 times [2021-07-13 19:35:47,863 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:35:47,863 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529309945] [2021-07-13 19:35:47,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:35:47,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:35:48,069 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:35:48,069 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:35:48,069 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529309945] [2021-07-13 19:35:48,069 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [529309945] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:35:48,069 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [412875270] [2021-07-13 19:35:48,069 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 383 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 383 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:35:48,099 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-13 19:35:48,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:35:48,101 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 57 conjunts are in the unsatisfiable core [2021-07-13 19:35:48,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:35:48,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:48,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:48,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:48,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:48,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:48,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:48,763 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:35:48,767 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:35:48,768 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 28 [2021-07-13 19:35:48,769 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:35:48,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:48,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:48,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:48,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:48,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:48,776 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:35:48,780 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:35:48,782 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 36 [2021-07-13 19:35:48,783 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:35:48,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:48,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:48,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:48,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:48,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:48,790 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:35:48,793 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:35:48,795 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 44 [2021-07-13 19:35:48,798 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:35:48,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:48,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:48,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:48,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:48,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:48,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:48,805 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:35:48,805 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 36 [2021-07-13 19:35:48,807 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:35:48,881 INFO L628 ElimStorePlain]: treesize reduction 97, result has 41.6 percent of original size [2021-07-13 19:35:48,883 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:35:48,884 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-13 19:35:48,885 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-13 19:35:48,911 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:35:48,912 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:35:48,912 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:305, output treesize:48 [2021-07-13 19:35:48,996 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:35:48,996 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [412875270] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:35:48,996 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:35:48,996 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-07-13 19:35:48,996 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687397813] [2021-07-13 19:35:48,996 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 19:35:48,997 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:35:48,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 19:35:48,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:35:48,997 INFO L87 Difference]: Start difference. First operand 1398 states and 4065 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:35:50,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:35:50,350 INFO L93 Difference]: Finished difference Result 1627 states and 4586 transitions. [2021-07-13 19:35:50,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-13 19:35:50,351 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:35:50,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:35:50,354 INFO L225 Difference]: With dead ends: 1627 [2021-07-13 19:35:50,354 INFO L226 Difference]: Without dead ends: 1619 [2021-07-13 19:35:50,354 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 1570.9ms TimeCoverageRelationStatistics Valid=169, Invalid=1237, Unknown=0, NotChecked=0, Total=1406 [2021-07-13 19:35:50,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1619 states. [2021-07-13 19:35:50,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1619 to 1442. [2021-07-13 19:35:50,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1442 states, 1441 states have (on average 2.9222761970853575) internal successors, (4211), 1441 states have internal predecessors, (4211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:35:50,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1442 states to 1442 states and 4211 transitions. [2021-07-13 19:35:50,372 INFO L78 Accepts]: Start accepts. Automaton has 1442 states and 4211 transitions. Word has length 18 [2021-07-13 19:35:50,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:35:50,372 INFO L482 AbstractCegarLoop]: Abstraction has 1442 states and 4211 transitions. [2021-07-13 19:35:50,372 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:35:50,372 INFO L276 IsEmpty]: Start isEmpty. Operand 1442 states and 4211 transitions. [2021-07-13 19:35:50,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:35:50,373 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:35:50,373 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:35:50,574 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3134,383 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:35:50,574 INFO L430 AbstractCegarLoop]: === Iteration 393 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:35:50,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:35:50,574 INFO L82 PathProgramCache]: Analyzing trace with hash 42024968, now seen corresponding path program 379 times [2021-07-13 19:35:50,574 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:35:50,574 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941998283] [2021-07-13 19:35:50,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:35:50,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:35:51,174 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:35:51,174 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:35:51,174 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941998283] [2021-07-13 19:35:51,174 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1941998283] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:35:51,174 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1503227306] [2021-07-13 19:35:51,174 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 384 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 384 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:35:51,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:35:51,205 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 53 conjunts are in the unsatisfiable core [2021-07-13 19:35:51,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:35:51,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:51,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:51,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:51,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:51,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:51,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:51,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:51,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:51,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:51,916 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:35:51,924 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:35:51,925 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 42 [2021-07-13 19:35:51,927 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:35:51,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:51,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:51,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:51,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:51,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:51,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:51,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:51,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:51,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:51,935 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:35:51,936 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 40 [2021-07-13 19:35:51,937 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:35:51,949 INFO L628 ElimStorePlain]: treesize reduction 110, result has 9.1 percent of original size [2021-07-13 19:35:51,949 INFO L518 ElimStorePlain]: Eliminatee v_prenex_319 vanished before elimination [2021-07-13 19:35:51,949 INFO L518 ElimStorePlain]: Eliminatee array_0 vanished before elimination [2021-07-13 19:35:51,949 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:35:51,950 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:35:51,950 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 6 variables, input treesize:206, output treesize:11 [2021-07-13 19:35:51,979 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:35:51,979 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1503227306] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:35:51,980 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:35:51,980 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-07-13 19:35:51,980 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426433602] [2021-07-13 19:35:51,980 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 19:35:51,980 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:35:51,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 19:35:51,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=412, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:35:51,980 INFO L87 Difference]: Start difference. First operand 1442 states and 4211 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:35:52,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:35:52,985 INFO L93 Difference]: Finished difference Result 1508 states and 4349 transitions. [2021-07-13 19:35:52,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 19:35:52,985 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:35:52,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:35:52,987 INFO L225 Difference]: With dead ends: 1508 [2021-07-13 19:35:52,987 INFO L226 Difference]: Without dead ends: 1498 [2021-07-13 19:35:52,987 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 1734.2ms TimeCoverageRelationStatistics Valid=103, Invalid=889, Unknown=0, NotChecked=0, Total=992 [2021-07-13 19:35:52,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1498 states. [2021-07-13 19:35:52,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1498 to 1443. [2021-07-13 19:35:53,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1443 states, 1442 states have (on average 2.921636615811373) internal successors, (4213), 1442 states have internal predecessors, (4213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:35:53,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1443 states to 1443 states and 4213 transitions. [2021-07-13 19:35:53,002 INFO L78 Accepts]: Start accepts. Automaton has 1443 states and 4213 transitions. Word has length 18 [2021-07-13 19:35:53,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:35:53,002 INFO L482 AbstractCegarLoop]: Abstraction has 1443 states and 4213 transitions. [2021-07-13 19:35:53,002 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:35:53,003 INFO L276 IsEmpty]: Start isEmpty. Operand 1443 states and 4213 transitions. [2021-07-13 19:35:53,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:35:53,004 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:35:53,004 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:35:53,204 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3156,384 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:35:53,204 INFO L430 AbstractCegarLoop]: === Iteration 394 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:35:53,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:35:53,205 INFO L82 PathProgramCache]: Analyzing trace with hash 1544022984, now seen corresponding path program 380 times [2021-07-13 19:35:53,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:35:53,205 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302140532] [2021-07-13 19:35:53,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:35:53,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:35:53,401 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:35:53,401 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:35:53,401 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302140532] [2021-07-13 19:35:53,401 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1302140532] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:35:53,401 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1350965420] [2021-07-13 19:35:53,401 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 385 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 385 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:35:53,429 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:35:53,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:35:53,430 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 57 conjunts are in the unsatisfiable core [2021-07-13 19:35:53,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:35:54,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:54,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:54,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:54,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:54,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:54,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:54,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:54,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:54,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:54,099 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:35:54,105 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:35:54,105 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 40 [2021-07-13 19:35:54,107 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:35:54,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:54,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:54,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:54,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:54,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:54,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:54,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:54,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:54,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:54,116 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:35:54,116 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 42 [2021-07-13 19:35:54,118 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:35:54,130 INFO L628 ElimStorePlain]: treesize reduction 112, result has 8.9 percent of original size [2021-07-13 19:35:54,130 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:35:54,130 INFO L518 ElimStorePlain]: Eliminatee v_prenex_323 vanished before elimination [2021-07-13 19:35:54,130 INFO L518 ElimStorePlain]: Eliminatee v_prenex_324 vanished before elimination [2021-07-13 19:35:54,131 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:35:54,131 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 6 variables, input treesize:206, output treesize:11 [2021-07-13 19:35:54,139 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:35:54,139 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1350965420] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:35:54,139 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:35:54,139 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-07-13 19:35:54,139 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438324392] [2021-07-13 19:35:54,139 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 19:35:54,139 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:35:54,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 19:35:54,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:35:54,140 INFO L87 Difference]: Start difference. First operand 1443 states and 4213 transitions. Second operand has 22 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 22 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:35:54,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:35:54,666 INFO L93 Difference]: Finished difference Result 1494 states and 4320 transitions. [2021-07-13 19:35:54,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 19:35:54,666 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 22 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:35:54,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:35:54,668 INFO L225 Difference]: With dead ends: 1494 [2021-07-13 19:35:54,669 INFO L226 Difference]: Without dead ends: 1485 [2021-07-13 19:35:54,669 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 969.4ms TimeCoverageRelationStatistics Valid=118, Invalid=694, Unknown=0, NotChecked=0, Total=812 [2021-07-13 19:35:54,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1485 states. [2021-07-13 19:35:54,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1485 to 1451. [2021-07-13 19:35:54,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1451 states, 1450 states have (on average 2.9172413793103447) internal successors, (4230), 1450 states have internal predecessors, (4230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:35:54,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1451 states to 1451 states and 4230 transitions. [2021-07-13 19:35:54,685 INFO L78 Accepts]: Start accepts. Automaton has 1451 states and 4230 transitions. Word has length 18 [2021-07-13 19:35:54,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:35:54,685 INFO L482 AbstractCegarLoop]: Abstraction has 1451 states and 4230 transitions. [2021-07-13 19:35:54,685 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 22 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:35:54,685 INFO L276 IsEmpty]: Start isEmpty. Operand 1451 states and 4230 transitions. [2021-07-13 19:35:54,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:35:54,686 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:35:54,686 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:35:54,888 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3175,385 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:35:54,889 INFO L430 AbstractCegarLoop]: === Iteration 395 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:35:54,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:35:54,889 INFO L82 PathProgramCache]: Analyzing trace with hash 1783665322, now seen corresponding path program 381 times [2021-07-13 19:35:54,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:35:54,889 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030657105] [2021-07-13 19:35:54,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:35:54,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:35:55,364 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:35:55,365 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:35:55,365 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030657105] [2021-07-13 19:35:55,365 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1030657105] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:35:55,365 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1153170548] [2021-07-13 19:35:55,365 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 386 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 386 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:35:55,393 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 19:35:55,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:35:55,394 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 57 conjunts are in the unsatisfiable core [2021-07-13 19:35:55,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:35:56,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:56,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:56,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:56,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:56,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:56,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:56,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:56,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:56,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:56,063 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:35:56,070 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:35:56,071 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 32 [2021-07-13 19:35:56,072 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:35:56,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:56,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:56,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:56,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:56,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:56,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:56,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:56,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:56,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:56,081 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:35:56,082 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 40 [2021-07-13 19:35:56,083 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:35:56,129 INFO L628 ElimStorePlain]: treesize reduction 91, result has 47.4 percent of original size [2021-07-13 19:35:56,129 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:35:56,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:56,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:56,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:56,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:56,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:56,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:56,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:56,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:56,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:56,137 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:35:56,137 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 42 [2021-07-13 19:35:56,139 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:35:56,149 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:35:56,151 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:35:56,152 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-13 19:35:56,152 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:35:56,162 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:35:56,163 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:35:56,163 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:257, output treesize:22 [2021-07-13 19:35:56,185 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:35:56,185 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1153170548] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:35:56,185 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:35:56,185 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2021-07-13 19:35:56,185 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351395633] [2021-07-13 19:35:56,185 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 19:35:56,185 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:35:56,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 19:35:56,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:35:56,186 INFO L87 Difference]: Start difference. First operand 1451 states and 4230 transitions. Second operand has 23 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 23 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:35:57,037 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 72 [2021-07-13 19:35:57,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:35:57,361 INFO L93 Difference]: Finished difference Result 1633 states and 4654 transitions. [2021-07-13 19:35:57,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 19:35:57,362 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 23 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:35:57,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:35:57,364 INFO L225 Difference]: With dead ends: 1633 [2021-07-13 19:35:57,364 INFO L226 Difference]: Without dead ends: 1623 [2021-07-13 19:35:57,365 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 1692.2ms TimeCoverageRelationStatistics Valid=127, Invalid=865, Unknown=0, NotChecked=0, Total=992 [2021-07-13 19:35:57,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1623 states. [2021-07-13 19:35:57,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1623 to 1478. [2021-07-13 19:35:57,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1478 states, 1477 states have (on average 2.920108327691266) internal successors, (4313), 1477 states have internal predecessors, (4313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:35:57,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1478 states to 1478 states and 4313 transitions. [2021-07-13 19:35:57,386 INFO L78 Accepts]: Start accepts. Automaton has 1478 states and 4313 transitions. Word has length 18 [2021-07-13 19:35:57,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:35:57,386 INFO L482 AbstractCegarLoop]: Abstraction has 1478 states and 4313 transitions. [2021-07-13 19:35:57,386 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 23 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:35:57,386 INFO L276 IsEmpty]: Start isEmpty. Operand 1478 states and 4313 transitions. [2021-07-13 19:35:57,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:35:57,388 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:35:57,388 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:35:57,588 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 386 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3193 [2021-07-13 19:35:57,588 INFO L430 AbstractCegarLoop]: === Iteration 396 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:35:57,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:35:57,589 INFO L82 PathProgramCache]: Analyzing trace with hash 1791395720, now seen corresponding path program 382 times [2021-07-13 19:35:57,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:35:57,589 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939192262] [2021-07-13 19:35:57,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:35:57,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:35:57,786 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:35:57,786 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:35:57,786 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939192262] [2021-07-13 19:35:57,786 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1939192262] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:35:57,786 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [687192358] [2021-07-13 19:35:57,786 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 387 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 387 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:35:57,812 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:35:57,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:35:57,814 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 53 conjunts are in the unsatisfiable core [2021-07-13 19:35:57,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:35:58,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:58,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:58,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:58,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:58,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:58,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:58,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:58,407 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:35:58,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:58,413 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:35:58,414 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 38 [2021-07-13 19:35:58,416 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:35:58,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:58,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:58,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:58,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:58,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:58,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:58,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:58,423 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:35:58,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:58,429 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:35:58,430 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 40 [2021-07-13 19:35:58,431 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:35:58,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:58,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:58,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:58,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:58,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:58,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:58,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:58,438 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:35:58,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:35:58,439 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 38 [2021-07-13 19:35:58,442 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:35:58,456 INFO L628 ElimStorePlain]: treesize reduction 72, result has 13.3 percent of original size [2021-07-13 19:35:58,456 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:35:58,457 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:35:58,457 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:194, output treesize:11 [2021-07-13 19:35:58,484 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:35:58,485 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [687192358] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:35:58,485 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:35:58,485 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-07-13 19:35:58,485 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245600633] [2021-07-13 19:35:58,485 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:35:58,485 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:35:58,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:35:58,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:35:58,485 INFO L87 Difference]: Start difference. First operand 1478 states and 4313 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:35:59,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:35:59,220 INFO L93 Difference]: Finished difference Result 1690 states and 4811 transitions. [2021-07-13 19:35:59,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 19:35:59,221 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:35:59,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:35:59,223 INFO L225 Difference]: With dead ends: 1690 [2021-07-13 19:35:59,223 INFO L226 Difference]: Without dead ends: 1687 [2021-07-13 19:35:59,223 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 991.8ms TimeCoverageRelationStatistics Valid=106, Invalid=706, Unknown=0, NotChecked=0, Total=812 [2021-07-13 19:35:59,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1687 states. [2021-07-13 19:35:59,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1687 to 1566. [2021-07-13 19:35:59,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1566 states, 1565 states have (on average 2.94888178913738) internal successors, (4615), 1565 states have internal predecessors, (4615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:35:59,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1566 states to 1566 states and 4615 transitions. [2021-07-13 19:35:59,241 INFO L78 Accepts]: Start accepts. Automaton has 1566 states and 4615 transitions. Word has length 18 [2021-07-13 19:35:59,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:35:59,241 INFO L482 AbstractCegarLoop]: Abstraction has 1566 states and 4615 transitions. [2021-07-13 19:35:59,241 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:35:59,241 INFO L276 IsEmpty]: Start isEmpty. Operand 1566 states and 4615 transitions. [2021-07-13 19:35:59,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:35:59,243 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:35:59,243 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:35:59,443 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 387 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3210 [2021-07-13 19:35:59,444 INFO L430 AbstractCegarLoop]: === Iteration 397 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:35:59,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:35:59,444 INFO L82 PathProgramCache]: Analyzing trace with hash -2089409042, now seen corresponding path program 383 times [2021-07-13 19:35:59,444 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:35:59,444 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147924484] [2021-07-13 19:35:59,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:35:59,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:35:59,842 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:35:59,842 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:35:59,842 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147924484] [2021-07-13 19:35:59,842 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1147924484] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:35:59,842 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1524407133] [2021-07-13 19:35:59,842 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 388 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 388 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:35:59,872 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:35:59,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:35:59,873 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 53 conjunts are in the unsatisfiable core [2021-07-13 19:35:59,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:36:00,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:36:00,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:36:00,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:36:00,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:36:00,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:36:00,604 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:36:00,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:36:00,605 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 38 [2021-07-13 19:36:00,607 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:36:00,624 INFO L628 ElimStorePlain]: treesize reduction 147, result has 7.0 percent of original size [2021-07-13 19:36:00,624 INFO L518 ElimStorePlain]: Eliminatee array_0 vanished before elimination [2021-07-13 19:36:00,625 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:36:00,625 INFO L518 ElimStorePlain]: Eliminatee v_prenex_330 vanished before elimination [2021-07-13 19:36:00,625 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:36:00,625 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:194, output treesize:11 [2021-07-13 19:36:00,654 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:36:00,654 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1524407133] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:36:00,654 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:36:00,654 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-07-13 19:36:00,654 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415191679] [2021-07-13 19:36:00,654 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:36:00,654 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:36:00,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:36:00,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=371, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:36:00,655 INFO L87 Difference]: Start difference. First operand 1566 states and 4615 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:36:02,092 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 61 [2021-07-13 19:36:02,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:36:02,224 INFO L93 Difference]: Finished difference Result 1665 states and 4804 transitions. [2021-07-13 19:36:02,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 19:36:02,225 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:36:02,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:36:02,227 INFO L225 Difference]: With dead ends: 1665 [2021-07-13 19:36:02,227 INFO L226 Difference]: Without dead ends: 1662 [2021-07-13 19:36:02,227 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 2142.9ms TimeCoverageRelationStatistics Valid=153, Invalid=1179, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 19:36:02,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1662 states. [2021-07-13 19:36:02,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1662 to 1578. [2021-07-13 19:36:02,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1578 states, 1577 states have (on average 2.946734305643627) internal successors, (4647), 1577 states have internal predecessors, (4647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:36:02,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1578 states to 1578 states and 4647 transitions. [2021-07-13 19:36:02,245 INFO L78 Accepts]: Start accepts. Automaton has 1578 states and 4647 transitions. Word has length 18 [2021-07-13 19:36:02,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:36:02,245 INFO L482 AbstractCegarLoop]: Abstraction has 1578 states and 4647 transitions. [2021-07-13 19:36:02,245 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:36:02,245 INFO L276 IsEmpty]: Start isEmpty. Operand 1578 states and 4647 transitions. [2021-07-13 19:36:02,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:36:02,247 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:36:02,247 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:36:02,447 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3234,388 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:36:02,447 INFO L430 AbstractCegarLoop]: === Iteration 398 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:36:02,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:36:02,447 INFO L82 PathProgramCache]: Analyzing trace with hash 723883656, now seen corresponding path program 384 times [2021-07-13 19:36:02,447 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:36:02,447 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889723684] [2021-07-13 19:36:02,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:36:02,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:36:02,781 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:36:02,781 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:36:02,781 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889723684] [2021-07-13 19:36:02,781 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [889723684] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:36:02,781 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [401807472] [2021-07-13 19:36:02,781 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 389 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 389 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:36:02,813 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-13 19:36:02,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:36:02,814 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 57 conjunts are in the unsatisfiable core [2021-07-13 19:36:02,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:36:03,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:36:03,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:36:03,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:36:03,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:36:03,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:36:03,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:36:03,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:36:03,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:36:03,418 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:36:03,423 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:36:03,423 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 30 [2021-07-13 19:36:03,425 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:36:03,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:36:03,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:36:03,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:36:03,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:36:03,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:36:03,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:36:03,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:36:03,433 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:36:03,438 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:36:03,439 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 38 [2021-07-13 19:36:03,440 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:36:03,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:36:03,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:36:03,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:36:03,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:36:03,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:36:03,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:36:03,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:36:03,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:36:03,450 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:36:03,455 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:36:03,455 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 38 [2021-07-13 19:36:03,457 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:36:03,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:36:03,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:36:03,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:36:03,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:36:03,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:36:03,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:36:03,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:36:03,466 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:36:03,467 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 46 [2021-07-13 19:36:03,469 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:36:03,535 INFO L628 ElimStorePlain]: treesize reduction 101, result has 42.0 percent of original size [2021-07-13 19:36:03,538 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:36:03,538 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-13 19:36:03,539 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-13 19:36:03,566 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:36:03,567 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:36:03,568 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:329, output treesize:52 [2021-07-13 19:36:03,632 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:36:03,632 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [401807472] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:36:03,632 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:36:03,632 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 21 [2021-07-13 19:36:03,632 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175651642] [2021-07-13 19:36:03,632 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:36:03,632 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:36:03,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:36:03,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=367, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:36:03,633 INFO L87 Difference]: Start difference. First operand 1578 states and 4647 transitions. Second operand has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:36:05,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:36:05,028 INFO L93 Difference]: Finished difference Result 1745 states and 5001 transitions. [2021-07-13 19:36:05,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-13 19:36:05,028 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:36:05,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:36:05,031 INFO L225 Difference]: With dead ends: 1745 [2021-07-13 19:36:05,031 INFO L226 Difference]: Without dead ends: 1736 [2021-07-13 19:36:05,031 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 8 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 1703.2ms TimeCoverageRelationStatistics Valid=125, Invalid=997, Unknown=0, NotChecked=0, Total=1122 [2021-07-13 19:36:05,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1736 states. [2021-07-13 19:36:05,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1736 to 1590. [2021-07-13 19:36:05,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1590 states, 1589 states have (on average 2.951541850220264) internal successors, (4690), 1589 states have internal predecessors, (4690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:36:05,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1590 states to 1590 states and 4690 transitions. [2021-07-13 19:36:05,050 INFO L78 Accepts]: Start accepts. Automaton has 1590 states and 4690 transitions. Word has length 18 [2021-07-13 19:36:05,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:36:05,050 INFO L482 AbstractCegarLoop]: Abstraction has 1590 states and 4690 transitions. [2021-07-13 19:36:05,050 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:36:05,050 INFO L276 IsEmpty]: Start isEmpty. Operand 1590 states and 4690 transitions. [2021-07-13 19:36:05,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:36:05,052 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:36:05,052 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:36:05,252 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3256,389 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:36:05,252 INFO L430 AbstractCegarLoop]: === Iteration 399 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:36:05,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:36:05,253 INFO L82 PathProgramCache]: Analyzing trace with hash -302051606, now seen corresponding path program 385 times [2021-07-13 19:36:05,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:36:05,253 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343408988] [2021-07-13 19:36:05,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:36:05,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:36:05,529 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:36:05,529 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:36:05,529 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343408988] [2021-07-13 19:36:05,529 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1343408988] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:36:05,530 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [733545165] [2021-07-13 19:36:05,530 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 390 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 390 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:36:05,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:36:05,559 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 53 conjunts are in the unsatisfiable core [2021-07-13 19:36:05,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:36:06,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:36:06,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:36:06,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:36:06,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:36:06,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:36:06,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:36:06,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:36:06,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:36:06,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:36:06,264 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:36:06,264 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 40 [2021-07-13 19:36:06,266 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:36:06,285 INFO L628 ElimStorePlain]: treesize reduction 155, result has 6.6 percent of original size [2021-07-13 19:36:06,285 INFO L518 ElimStorePlain]: Eliminatee v_prenex_339 vanished before elimination [2021-07-13 19:36:06,285 INFO L518 ElimStorePlain]: Eliminatee array_0 vanished before elimination [2021-07-13 19:36:06,285 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:36:06,285 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:36:06,286 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:206, output treesize:11 [2021-07-13 19:36:06,293 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:36:06,294 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [733545165] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:36:06,294 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:36:06,294 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-07-13 19:36:06,294 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804888649] [2021-07-13 19:36:06,294 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:36:06,294 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:36:06,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:36:06,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=371, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:36:06,294 INFO L87 Difference]: Start difference. First operand 1590 states and 4690 transitions. Second operand has 21 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:36:07,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:36:07,317 INFO L93 Difference]: Finished difference Result 1737 states and 4961 transitions. [2021-07-13 19:36:07,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 19:36:07,317 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:36:07,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:36:07,320 INFO L225 Difference]: With dead ends: 1737 [2021-07-13 19:36:07,320 INFO L226 Difference]: Without dead ends: 1719 [2021-07-13 19:36:07,320 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 1392.9ms TimeCoverageRelationStatistics Valid=110, Invalid=820, Unknown=0, NotChecked=0, Total=930 [2021-07-13 19:36:07,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1719 states. [2021-07-13 19:36:07,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1719 to 1562. [2021-07-13 19:36:07,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1562 states, 1561 states have (on average 2.9506726457399104) internal successors, (4606), 1561 states have internal predecessors, (4606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:36:07,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1562 states to 1562 states and 4606 transitions. [2021-07-13 19:36:07,339 INFO L78 Accepts]: Start accepts. Automaton has 1562 states and 4606 transitions. Word has length 18 [2021-07-13 19:36:07,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:36:07,339 INFO L482 AbstractCegarLoop]: Abstraction has 1562 states and 4606 transitions. [2021-07-13 19:36:07,339 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:36:07,339 INFO L276 IsEmpty]: Start isEmpty. Operand 1562 states and 4606 transitions. [2021-07-13 19:36:07,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:36:07,341 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:36:07,341 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:36:07,541 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 390 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3278 [2021-07-13 19:36:07,541 INFO L430 AbstractCegarLoop]: === Iteration 400 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:36:07,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:36:07,542 INFO L82 PathProgramCache]: Analyzing trace with hash -2114266168, now seen corresponding path program 386 times [2021-07-13 19:36:07,542 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:36:07,542 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244842781] [2021-07-13 19:36:07,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:36:07,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:36:07,813 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:36:07,813 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:36:07,813 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244842781] [2021-07-13 19:36:07,813 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [244842781] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:36:07,813 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [641703784] [2021-07-13 19:36:07,813 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 391 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 391 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:36:07,840 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:36:07,840 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:36:07,841 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 57 conjunts are in the unsatisfiable core [2021-07-13 19:36:07,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:36:08,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:36:08,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:36:08,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:36:08,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:36:08,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:36:08,536 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:36:08,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:36:08,537 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 38 [2021-07-13 19:36:08,538 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:36:08,557 INFO L628 ElimStorePlain]: treesize reduction 143, result has 7.1 percent of original size [2021-07-13 19:36:08,557 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:36:08,557 INFO L518 ElimStorePlain]: Eliminatee v_prenex_343 vanished before elimination [2021-07-13 19:36:08,557 INFO L518 ElimStorePlain]: Eliminatee v_prenex_344 vanished before elimination [2021-07-13 19:36:08,558 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:36:08,558 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:194, output treesize:11 [2021-07-13 19:36:08,584 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:36:08,584 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [641703784] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:36:08,585 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:36:08,585 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-07-13 19:36:08,585 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083335262] [2021-07-13 19:36:08,585 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 19:36:08,585 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:36:08,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 19:36:08,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:36:08,585 INFO L87 Difference]: Start difference. First operand 1562 states and 4606 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:36:09,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:36:09,378 INFO L93 Difference]: Finished difference Result 1728 states and 4945 transitions. [2021-07-13 19:36:09,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 19:36:09,378 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:36:09,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:36:09,381 INFO L225 Difference]: With dead ends: 1728 [2021-07-13 19:36:09,381 INFO L226 Difference]: Without dead ends: 1713 [2021-07-13 19:36:09,381 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 1154.0ms TimeCoverageRelationStatistics Valid=138, Invalid=854, Unknown=0, NotChecked=0, Total=992 [2021-07-13 19:36:09,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1713 states. [2021-07-13 19:36:09,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1713 to 1598. [2021-07-13 19:36:09,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1598 states, 1597 states have (on average 2.949906073888541) internal successors, (4711), 1597 states have internal predecessors, (4711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:36:09,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1598 states to 1598 states and 4711 transitions. [2021-07-13 19:36:09,400 INFO L78 Accepts]: Start accepts. Automaton has 1598 states and 4711 transitions. Word has length 18 [2021-07-13 19:36:09,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:36:09,401 INFO L482 AbstractCegarLoop]: Abstraction has 1598 states and 4711 transitions. [2021-07-13 19:36:09,401 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:36:09,401 INFO L276 IsEmpty]: Start isEmpty. Operand 1598 states and 4711 transitions. [2021-07-13 19:36:09,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:36:09,402 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:36:09,403 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:36:09,603 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 391 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3295 [2021-07-13 19:36:09,603 INFO L430 AbstractCegarLoop]: === Iteration 401 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:36:09,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:36:09,603 INFO L82 PathProgramCache]: Analyzing trace with hash -1895630038, now seen corresponding path program 387 times [2021-07-13 19:36:09,603 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:36:09,603 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902094604] [2021-07-13 19:36:09,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:36:09,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:36:09,783 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:36:09,784 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:36:09,784 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902094604] [2021-07-13 19:36:09,784 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [902094604] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:36:09,784 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1159817044] [2021-07-13 19:36:09,784 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 392 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 392 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:36:09,813 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:36:09,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:36:09,814 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 53 conjunts are in the unsatisfiable core [2021-07-13 19:36:09,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:36:10,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:36:10,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:36:10,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:36:10,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:36:10,518 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:36:10,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:36:10,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:36:10,522 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:36:10,525 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 38 [2021-07-13 19:36:10,526 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:36:10,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:36:10,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:36:10,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:36:10,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:36:10,532 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:36:10,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:36:10,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:36:10,534 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 36 [2021-07-13 19:36:10,535 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:36:10,548 INFO L628 ElimStorePlain]: treesize reduction 104, result has 9.6 percent of original size [2021-07-13 19:36:10,548 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:36:10,548 INFO L518 ElimStorePlain]: Eliminatee v_prenex_346 vanished before elimination [2021-07-13 19:36:10,548 INFO L518 ElimStorePlain]: Eliminatee v_prenex_347 vanished before elimination [2021-07-13 19:36:10,549 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:36:10,549 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 6 variables, input treesize:182, output treesize:11 [2021-07-13 19:36:10,573 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:36:10,573 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1159817044] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:36:10,573 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:36:10,574 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 20 [2021-07-13 19:36:10,574 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508401756] [2021-07-13 19:36:10,574 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 19:36:10,574 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:36:10,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 19:36:10,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:36:10,574 INFO L87 Difference]: Start difference. First operand 1598 states and 4711 transitions. Second operand has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:36:11,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:36:11,570 INFO L93 Difference]: Finished difference Result 1701 states and 4889 transitions. [2021-07-13 19:36:11,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 19:36:11,570 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:36:11,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:36:11,573 INFO L225 Difference]: With dead ends: 1701 [2021-07-13 19:36:11,573 INFO L226 Difference]: Without dead ends: 1696 [2021-07-13 19:36:11,574 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 1360.0ms TimeCoverageRelationStatistics Valid=136, Invalid=920, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 19:36:11,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1696 states. [2021-07-13 19:36:11,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1696 to 1539. [2021-07-13 19:36:11,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1539 states, 1538 states have (on average 2.9408322496749024) internal successors, (4523), 1538 states have internal predecessors, (4523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:36:11,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1539 states to 1539 states and 4523 transitions. [2021-07-13 19:36:11,592 INFO L78 Accepts]: Start accepts. Automaton has 1539 states and 4523 transitions. Word has length 18 [2021-07-13 19:36:11,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:36:11,592 INFO L482 AbstractCegarLoop]: Abstraction has 1539 states and 4523 transitions. [2021-07-13 19:36:11,592 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:36:11,592 INFO L276 IsEmpty]: Start isEmpty. Operand 1539 states and 4523 transitions. [2021-07-13 19:36:11,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:36:11,600 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:36:11,600 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:36:11,800 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3313,392 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:36:11,801 INFO L430 AbstractCegarLoop]: === Iteration 402 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:36:11,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:36:11,801 INFO L82 PathProgramCache]: Analyzing trace with hash 917662660, now seen corresponding path program 388 times [2021-07-13 19:36:11,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:36:11,801 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702613992] [2021-07-13 19:36:11,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:36:11,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:36:12,036 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:36:12,036 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:36:12,036 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702613992] [2021-07-13 19:36:12,036 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1702613992] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:36:12,036 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [665127115] [2021-07-13 19:36:12,036 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 393 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 393 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:36:12,065 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:36:12,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:36:12,066 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 53 conjunts are in the unsatisfiable core [2021-07-13 19:36:12,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:36:12,635 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:36:12,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:36:12,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:36:12,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:36:12,638 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:36:12,643 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 34 [2021-07-13 19:36:12,644 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:36:12,647 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:36:12,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:36:12,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:36:12,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:36:12,649 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:36:12,654 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 36 [2021-07-13 19:36:12,655 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:36:12,657 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:36:12,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:36:12,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:36:12,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:36:12,660 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 34 [2021-07-13 19:36:12,661 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:36:12,673 INFO L628 ElimStorePlain]: treesize reduction 62, result has 15.1 percent of original size [2021-07-13 19:36:12,673 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:36:12,674 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:36:12,674 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:170, output treesize:11 [2021-07-13 19:36:12,700 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:36:12,700 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [665127115] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:36:12,700 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:36:12,700 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 20 [2021-07-13 19:36:12,701 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535674496] [2021-07-13 19:36:12,701 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 19:36:12,701 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:36:12,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 19:36:12,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:36:12,701 INFO L87 Difference]: Start difference. First operand 1539 states and 4523 transitions. Second operand has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:36:13,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:36:13,941 INFO L93 Difference]: Finished difference Result 1648 states and 4754 transitions. [2021-07-13 19:36:13,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 19:36:13,941 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:36:13,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:36:13,944 INFO L225 Difference]: With dead ends: 1648 [2021-07-13 19:36:13,944 INFO L226 Difference]: Without dead ends: 1640 [2021-07-13 19:36:13,944 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 1521.7ms TimeCoverageRelationStatistics Valid=153, Invalid=1037, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 19:36:13,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1640 states. [2021-07-13 19:36:13,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1640 to 1538. [2021-07-13 19:36:13,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1538 states, 1537 states have (on average 2.9362394274560835) internal successors, (4513), 1537 states have internal predecessors, (4513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:36:13,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1538 states to 1538 states and 4513 transitions. [2021-07-13 19:36:13,963 INFO L78 Accepts]: Start accepts. Automaton has 1538 states and 4513 transitions. Word has length 18 [2021-07-13 19:36:13,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:36:13,963 INFO L482 AbstractCegarLoop]: Abstraction has 1538 states and 4513 transitions. [2021-07-13 19:36:13,963 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:36:13,963 INFO L276 IsEmpty]: Start isEmpty. Operand 1538 states and 4513 transitions. [2021-07-13 19:36:13,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:36:13,965 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:36:13,965 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:36:14,172 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3334,393 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:36:14,173 INFO L430 AbstractCegarLoop]: === Iteration 403 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:36:14,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:36:14,173 INFO L82 PathProgramCache]: Analyzing trace with hash 1990748040, now seen corresponding path program 389 times [2021-07-13 19:36:14,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:36:14,173 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084508841] [2021-07-13 19:36:14,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:36:14,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:36:14,436 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:36:14,436 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:36:14,436 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084508841] [2021-07-13 19:36:14,436 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1084508841] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:36:14,436 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [6255164] [2021-07-13 19:36:14,436 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 394 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 394 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:36:14,465 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:36:14,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:36:14,466 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 53 conjunts are in the unsatisfiable core [2021-07-13 19:36:14,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:36:15,031 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:36:15,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:36:15,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:36:15,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:36:15,033 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:36:15,038 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 34 [2021-07-13 19:36:15,040 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:36:15,042 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:36:15,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:36:15,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:36:15,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:36:15,045 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:36:15,049 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 36 [2021-07-13 19:36:15,051 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:36:15,053 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:36:15,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:36:15,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:36:15,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:36:15,055 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 34 [2021-07-13 19:36:15,057 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:36:15,069 INFO L628 ElimStorePlain]: treesize reduction 72, result has 13.3 percent of original size [2021-07-13 19:36:15,069 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:36:15,070 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:36:15,070 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:170, output treesize:11 [2021-07-13 19:36:15,099 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:36:15,099 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [6255164] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:36:15,099 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:36:15,099 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-07-13 19:36:15,100 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407382619] [2021-07-13 19:36:15,100 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:36:15,100 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:36:15,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:36:15,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=371, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:36:15,100 INFO L87 Difference]: Start difference. First operand 1538 states and 4513 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:36:16,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:36:16,869 INFO L93 Difference]: Finished difference Result 1695 states and 4818 transitions. [2021-07-13 19:36:16,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-13 19:36:16,869 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:36:16,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:36:16,872 INFO L225 Difference]: With dead ends: 1695 [2021-07-13 19:36:16,872 INFO L226 Difference]: Without dead ends: 1685 [2021-07-13 19:36:16,873 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 335 ImplicationChecksByTransitivity, 1999.8ms TimeCoverageRelationStatistics Valid=190, Invalid=1532, Unknown=0, NotChecked=0, Total=1722 [2021-07-13 19:36:16,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1685 states. [2021-07-13 19:36:16,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1685 to 1536. [2021-07-13 19:36:16,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1536 states, 1535 states have (on average 2.9381107491856677) internal successors, (4510), 1535 states have internal predecessors, (4510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:36:16,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1536 states to 1536 states and 4510 transitions. [2021-07-13 19:36:16,891 INFO L78 Accepts]: Start accepts. Automaton has 1536 states and 4510 transitions. Word has length 18 [2021-07-13 19:36:16,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:36:16,891 INFO L482 AbstractCegarLoop]: Abstraction has 1536 states and 4510 transitions. [2021-07-13 19:36:16,891 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:36:16,891 INFO L276 IsEmpty]: Start isEmpty. Operand 1536 states and 4510 transitions. [2021-07-13 19:36:16,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:36:16,893 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:36:16,893 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:36:17,093 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3367,394 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:36:17,093 INFO L430 AbstractCegarLoop]: === Iteration 404 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:36:17,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:36:17,094 INFO L82 PathProgramCache]: Analyzing trace with hash 579517824, now seen corresponding path program 390 times [2021-07-13 19:36:17,094 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:36:17,094 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282411063] [2021-07-13 19:36:17,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:36:17,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:36:17,280 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:36:17,280 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:36:17,280 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282411063] [2021-07-13 19:36:17,280 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [282411063] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:36:17,280 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [128164904] [2021-07-13 19:36:17,280 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 395 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 395 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:36:17,309 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:36:17,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:36:17,310 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 53 conjunts are in the unsatisfiable core [2021-07-13 19:36:17,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:36:17,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:36:17,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:36:17,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:36:17,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:36:17,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:36:17,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:36:17,945 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:36:17,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:36:17,946 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 40 [2021-07-13 19:36:17,948 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:36:17,968 INFO L628 ElimStorePlain]: treesize reduction 155, result has 6.6 percent of original size [2021-07-13 19:36:17,968 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:36:17,968 INFO L518 ElimStorePlain]: Eliminatee v_prenex_353 vanished before elimination [2021-07-13 19:36:17,968 INFO L518 ElimStorePlain]: Eliminatee v_prenex_354 vanished before elimination [2021-07-13 19:36:17,968 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:36:17,968 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:206, output treesize:11 [2021-07-13 19:36:17,976 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:36:17,976 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [128164904] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:36:17,976 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:36:17,976 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-07-13 19:36:17,977 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577269073] [2021-07-13 19:36:17,977 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:36:17,977 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:36:17,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:36:17,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=367, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:36:17,977 INFO L87 Difference]: Start difference. First operand 1536 states and 4510 transitions. Second operand has 21 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:36:18,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:36:18,453 INFO L93 Difference]: Finished difference Result 1589 states and 4619 transitions. [2021-07-13 19:36:18,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 19:36:18,453 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:36:18,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:36:18,456 INFO L225 Difference]: With dead ends: 1589 [2021-07-13 19:36:18,456 INFO L226 Difference]: Without dead ends: 1582 [2021-07-13 19:36:18,456 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 844.9ms TimeCoverageRelationStatistics Valid=79, Invalid=571, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:36:18,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1582 states. [2021-07-13 19:36:18,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1582 to 1540. [2021-07-13 19:36:18,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1540 states, 1539 states have (on average 2.935672514619883) internal successors, (4518), 1539 states have internal predecessors, (4518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:36:18,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1540 states to 1540 states and 4518 transitions. [2021-07-13 19:36:18,476 INFO L78 Accepts]: Start accepts. Automaton has 1540 states and 4518 transitions. Word has length 18 [2021-07-13 19:36:18,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:36:18,476 INFO L482 AbstractCegarLoop]: Abstraction has 1540 states and 4518 transitions. [2021-07-13 19:36:18,476 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:36:18,477 INFO L276 IsEmpty]: Start isEmpty. Operand 1540 states and 4518 transitions. [2021-07-13 19:36:18,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:36:18,478 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:36:18,478 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:36:18,685 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3400,395 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:36:18,685 INFO L430 AbstractCegarLoop]: === Iteration 405 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:36:18,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:36:18,685 INFO L82 PathProgramCache]: Analyzing trace with hash 2081515840, now seen corresponding path program 391 times [2021-07-13 19:36:18,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:36:18,685 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474560695] [2021-07-13 19:36:18,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:36:18,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:36:18,896 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:36:18,896 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:36:18,896 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474560695] [2021-07-13 19:36:18,896 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1474560695] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:36:18,896 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [503289942] [2021-07-13 19:36:18,896 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 396 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 396 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:36:18,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:36:18,926 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 53 conjunts are in the unsatisfiable core [2021-07-13 19:36:18,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:36:19,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:36:19,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:36:19,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:36:19,506 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:36:19,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:36:19,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:36:19,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:36:19,510 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:36:19,513 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 40 [2021-07-13 19:36:19,514 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:36:19,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:36:19,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:36:19,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:36:19,519 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:36:19,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:36:19,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:36:19,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:36:19,536 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 42 [2021-07-13 19:36:19,539 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:36:19,553 INFO L628 ElimStorePlain]: treesize reduction 110, result has 9.1 percent of original size [2021-07-13 19:36:19,553 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:36:19,554 INFO L518 ElimStorePlain]: Eliminatee v_prenex_357 vanished before elimination [2021-07-13 19:36:19,554 INFO L518 ElimStorePlain]: Eliminatee v_prenex_358 vanished before elimination [2021-07-13 19:36:19,554 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:36:19,554 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 6 variables, input treesize:206, output treesize:11 [2021-07-13 19:36:19,563 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:36:19,563 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [503289942] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:36:19,563 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:36:19,563 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-07-13 19:36:19,564 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648388454] [2021-07-13 19:36:19,564 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:36:19,564 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:36:19,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:36:19,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:36:19,564 INFO L87 Difference]: Start difference. First operand 1540 states and 4518 transitions. Second operand has 21 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:36:20,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:36:20,183 INFO L93 Difference]: Finished difference Result 1632 states and 4677 transitions. [2021-07-13 19:36:20,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:36:20,184 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:36:20,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:36:20,187 INFO L225 Difference]: With dead ends: 1632 [2021-07-13 19:36:20,187 INFO L226 Difference]: Without dead ends: 1623 [2021-07-13 19:36:20,187 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 984.8ms TimeCoverageRelationStatistics Valid=115, Invalid=641, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:36:20,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1623 states. [2021-07-13 19:36:20,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1623 to 1544. [2021-07-13 19:36:20,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1544 states, 1543 states have (on average 2.929358392741413) internal successors, (4520), 1543 states have internal predecessors, (4520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:36:20,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1544 states to 1544 states and 4520 transitions. [2021-07-13 19:36:20,213 INFO L78 Accepts]: Start accepts. Automaton has 1544 states and 4520 transitions. Word has length 18 [2021-07-13 19:36:20,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:36:20,213 INFO L482 AbstractCegarLoop]: Abstraction has 1544 states and 4520 transitions. [2021-07-13 19:36:20,214 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:36:20,214 INFO L276 IsEmpty]: Start isEmpty. Operand 1544 states and 4520 transitions. [2021-07-13 19:36:20,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:36:20,215 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:36:20,215 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:36:20,415 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 396 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3419 [2021-07-13 19:36:20,416 INFO L430 AbstractCegarLoop]: === Iteration 406 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:36:20,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:36:20,416 INFO L82 PathProgramCache]: Analyzing trace with hash 659752486, now seen corresponding path program 392 times [2021-07-13 19:36:20,416 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:36:20,416 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443339235] [2021-07-13 19:36:20,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:36:20,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:36:20,697 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:36:20,697 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:36:20,698 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443339235] [2021-07-13 19:36:20,698 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [443339235] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:36:20,698 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1300901666] [2021-07-13 19:36:20,698 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 397 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 397 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:36:20,726 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:36:20,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:36:20,727 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 53 conjunts are in the unsatisfiable core [2021-07-13 19:36:20,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:36:21,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:36:21,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:36:21,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:36:21,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:36:21,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:36:21,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:36:21,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:36:21,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:36:21,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:36:21,417 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:36:21,423 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:36:21,423 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 40 [2021-07-13 19:36:21,425 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:36:21,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:36:21,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:36:21,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:36:21,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:36:21,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:36:21,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:36:21,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:36:21,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:36:21,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:36:21,434 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:36:21,438 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 42 [2021-07-13 19:36:21,440 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:36:21,454 INFO L628 ElimStorePlain]: treesize reduction 106, result has 9.4 percent of original size [2021-07-13 19:36:21,454 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:36:21,454 INFO L518 ElimStorePlain]: Eliminatee v_prenex_363 vanished before elimination [2021-07-13 19:36:21,454 INFO L518 ElimStorePlain]: Eliminatee v_prenex_364 vanished before elimination [2021-07-13 19:36:21,455 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:36:21,455 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 6 variables, input treesize:206, output treesize:11 [2021-07-13 19:36:21,481 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:36:21,481 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1300901666] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:36:21,481 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:36:21,481 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-07-13 19:36:21,481 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373870201] [2021-07-13 19:36:21,481 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 19:36:21,481 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:36:21,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 19:36:21,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:36:21,482 INFO L87 Difference]: Start difference. First operand 1544 states and 4520 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:36:22,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:36:22,143 INFO L93 Difference]: Finished difference Result 1739 states and 4962 transitions. [2021-07-13 19:36:22,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 19:36:22,144 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:36:22,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:36:22,146 INFO L225 Difference]: With dead ends: 1739 [2021-07-13 19:36:22,147 INFO L226 Difference]: Without dead ends: 1730 [2021-07-13 19:36:22,147 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 1052.4ms TimeCoverageRelationStatistics Valid=102, Invalid=654, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:36:22,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1730 states. [2021-07-13 19:36:22,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1730 to 1597. [2021-07-13 19:36:22,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1597 states, 1596 states have (on average 2.93796992481203) internal successors, (4689), 1596 states have internal predecessors, (4689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:36:22,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1597 states to 1597 states and 4689 transitions. [2021-07-13 19:36:22,176 INFO L78 Accepts]: Start accepts. Automaton has 1597 states and 4689 transitions. Word has length 18 [2021-07-13 19:36:22,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:36:22,176 INFO L482 AbstractCegarLoop]: Abstraction has 1597 states and 4689 transitions. [2021-07-13 19:36:22,176 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:36:22,176 INFO L276 IsEmpty]: Start isEmpty. Operand 1597 states and 4689 transitions. [2021-07-13 19:36:22,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:36:22,178 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:36:22,178 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:36:22,378 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 397 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3439 [2021-07-13 19:36:22,379 INFO L430 AbstractCegarLoop]: === Iteration 407 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:36:22,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:36:22,379 INFO L82 PathProgramCache]: Analyzing trace with hash -307490624, now seen corresponding path program 393 times [2021-07-13 19:36:22,379 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:36:22,379 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347629450] [2021-07-13 19:36:22,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:36:22,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:36:22,624 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:36:22,624 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:36:22,624 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347629450] [2021-07-13 19:36:22,624 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [347629450] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:36:22,624 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2023691657] [2021-07-13 19:36:22,624 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 398 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 398 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:36:22,653 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-13 19:36:22,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:36:22,654 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 57 conjunts are in the unsatisfiable core [2021-07-13 19:36:22,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:36:23,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:36:23,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:36:23,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:36:23,302 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:36:23,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:36:23,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:36:23,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:36:23,306 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:36:23,308 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 48 [2021-07-13 19:36:23,310 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:36:23,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:36:23,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:36:23,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:36:23,315 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:36:23,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:36:23,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:36:23,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:36:23,320 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:36:23,322 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 40 [2021-07-13 19:36:23,324 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:36:23,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:36:23,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:36:23,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:36:23,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:36:23,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:36:23,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:36:23,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:36:23,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:36:23,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:36:23,333 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:36:23,339 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:36:23,339 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 40 [2021-07-13 19:36:23,341 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:36:23,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:36:23,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:36:23,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:36:23,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:36:23,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:36:23,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:36:23,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:36:23,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:36:23,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:36:23,350 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:36:23,350 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 32 [2021-07-13 19:36:23,352 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:36:23,422 INFO L628 ElimStorePlain]: treesize reduction 105, result has 41.0 percent of original size [2021-07-13 19:36:23,425 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:36:23,425 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-13 19:36:23,426 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-13 19:36:23,452 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:36:23,454 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:36:23,454 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 4 variables, input treesize:345, output treesize:56 [2021-07-13 19:36:23,519 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:36:23,519 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2023691657] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:36:23,519 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:36:23,520 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-07-13 19:36:23,520 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13601147] [2021-07-13 19:36:23,520 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 19:36:23,520 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:36:23,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 19:36:23,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:36:23,520 INFO L87 Difference]: Start difference. First operand 1597 states and 4689 transitions. Second operand has 22 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 22 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:36:24,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:36:24,181 INFO L93 Difference]: Finished difference Result 1778 states and 5087 transitions. [2021-07-13 19:36:24,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 19:36:24,182 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 22 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:36:24,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:36:24,184 INFO L225 Difference]: With dead ends: 1778 [2021-07-13 19:36:24,184 INFO L226 Difference]: Without dead ends: 1769 [2021-07-13 19:36:24,184 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 7 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 1089.5ms TimeCoverageRelationStatistics Valid=85, Invalid=565, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:36:24,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1769 states. [2021-07-13 19:36:24,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1769 to 1652. [2021-07-13 19:36:24,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1652 states, 1651 states have (on average 2.9448818897637796) internal successors, (4862), 1651 states have internal predecessors, (4862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:36:24,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1652 states to 1652 states and 4862 transitions. [2021-07-13 19:36:24,203 INFO L78 Accepts]: Start accepts. Automaton has 1652 states and 4862 transitions. Word has length 18 [2021-07-13 19:36:24,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:36:24,203 INFO L482 AbstractCegarLoop]: Abstraction has 1652 states and 4862 transitions. [2021-07-13 19:36:24,203 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 22 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:36:24,203 INFO L276 IsEmpty]: Start isEmpty. Operand 1652 states and 4862 transitions. [2021-07-13 19:36:24,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:36:24,205 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:36:24,205 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:36:24,405 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3459,398 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:36:24,405 INFO L430 AbstractCegarLoop]: === Iteration 408 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:36:24,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:36:24,406 INFO L82 PathProgramCache]: Analyzing trace with hash 354044646, now seen corresponding path program 394 times [2021-07-13 19:36:24,406 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:36:24,406 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827200029] [2021-07-13 19:36:24,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:36:24,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:36:24,991 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:36:24,992 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:36:24,992 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827200029] [2021-07-13 19:36:24,992 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1827200029] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:36:24,992 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1507982768] [2021-07-13 19:36:24,992 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 399 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 399 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:36:25,021 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:36:25,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:36:25,022 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 53 conjunts are in the unsatisfiable core [2021-07-13 19:36:25,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:36:25,525 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 51 [2021-07-13 19:36:25,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:36:25,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:36:25,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:36:25,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:36:25,773 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:36:25,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:36:25,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:36:25,778 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:36:25,780 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 38 [2021-07-13 19:36:25,782 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:36:25,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:36:25,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:36:25,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:36:25,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:36:25,787 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:36:25,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:36:25,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:36:25,789 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 36 [2021-07-13 19:36:25,790 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:36:25,833 INFO L628 ElimStorePlain]: treesize reduction 87, result has 46.3 percent of original size [2021-07-13 19:36:25,835 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:36:25,836 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-13 19:36:25,836 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:36:25,851 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:36:25,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:36:25,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:36:25,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:36:25,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:36:25,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:36:25,856 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 23 [2021-07-13 19:36:25,858 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:36:25,875 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:36:25,876 INFO L518 ElimStorePlain]: Eliminatee v_prenex_369 vanished before elimination [2021-07-13 19:36:25,877 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:36:25,877 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:225, output treesize:22 [2021-07-13 19:36:25,915 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:36:25,915 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1507982768] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:36:25,916 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:36:25,916 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-07-13 19:36:25,916 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322204495] [2021-07-13 19:36:25,916 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 19:36:25,916 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:36:25,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 19:36:25,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=448, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:36:25,916 INFO L87 Difference]: Start difference. First operand 1652 states and 4862 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:36:26,896 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 67 [2021-07-13 19:36:27,154 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 74 [2021-07-13 19:36:27,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:36:27,477 INFO L93 Difference]: Finished difference Result 1766 states and 5087 transitions. [2021-07-13 19:36:27,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 19:36:27,478 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:36:27,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:36:27,481 INFO L225 Difference]: With dead ends: 1766 [2021-07-13 19:36:27,481 INFO L226 Difference]: Without dead ends: 1760 [2021-07-13 19:36:27,481 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 2178.8ms TimeCoverageRelationStatistics Valid=125, Invalid=997, Unknown=0, NotChecked=0, Total=1122 [2021-07-13 19:36:27,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1760 states. [2021-07-13 19:36:27,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1760 to 1664. [2021-07-13 19:36:27,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1664 states, 1663 states have (on average 2.9464822609741432) internal successors, (4900), 1663 states have internal predecessors, (4900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:36:27,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1664 states to 1664 states and 4900 transitions. [2021-07-13 19:36:27,501 INFO L78 Accepts]: Start accepts. Automaton has 1664 states and 4900 transitions. Word has length 18 [2021-07-13 19:36:27,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:36:27,501 INFO L482 AbstractCegarLoop]: Abstraction has 1664 states and 4900 transitions. [2021-07-13 19:36:27,501 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:36:27,501 INFO L276 IsEmpty]: Start isEmpty. Operand 1664 states and 4900 transitions. [2021-07-13 19:36:27,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:36:27,503 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:36:27,503 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:36:27,703 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 399 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3472 [2021-07-13 19:36:27,703 INFO L430 AbstractCegarLoop]: === Iteration 409 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:36:27,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:36:27,704 INFO L82 PathProgramCache]: Analyzing trace with hash -1127629952, now seen corresponding path program 395 times [2021-07-13 19:36:27,704 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:36:27,704 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465142004] [2021-07-13 19:36:27,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:36:27,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:36:28,308 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:36:28,309 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:36:28,309 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465142004] [2021-07-13 19:36:28,309 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [465142004] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:36:28,309 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1260165076] [2021-07-13 19:36:28,309 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 400 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 400 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:36:28,338 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:36:28,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:36:28,339 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 53 conjunts are in the unsatisfiable core [2021-07-13 19:36:28,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:36:28,892 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:36:28,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:36:28,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:36:28,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:36:28,894 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:36:28,899 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 26 [2021-07-13 19:36:28,901 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:36:28,903 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:36:28,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:36:28,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:36:28,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:36:28,906 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:36:28,910 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 34 [2021-07-13 19:36:28,911 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:36:28,914 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:36:28,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:36:28,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:36:28,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:36:28,916 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:36:28,920 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 42 [2021-07-13 19:36:28,922 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:36:28,924 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:36:28,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:36:28,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:36:28,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:36:28,927 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 34 [2021-07-13 19:36:28,928 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:36:28,944 INFO L628 ElimStorePlain]: treesize reduction 83, result has 15.3 percent of original size [2021-07-13 19:36:28,944 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:36:28,945 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:36:28,945 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:217, output treesize:11 [2021-07-13 19:36:28,978 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:36:28,979 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1260165076] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:36:28,979 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:36:28,979 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-07-13 19:36:28,979 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065013560] [2021-07-13 19:36:28,979 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 19:36:28,979 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:36:28,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 19:36:28,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=455, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:36:28,979 INFO L87 Difference]: Start difference. First operand 1664 states and 4900 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:36:30,219 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 71 [2021-07-13 19:36:30,377 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 70 [2021-07-13 19:36:30,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:36:30,679 INFO L93 Difference]: Finished difference Result 1734 states and 5045 transitions. [2021-07-13 19:36:30,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 19:36:30,679 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:36:30,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:36:30,682 INFO L225 Difference]: With dead ends: 1734 [2021-07-13 19:36:30,682 INFO L226 Difference]: Without dead ends: 1726 [2021-07-13 19:36:30,682 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 2277.6ms TimeCoverageRelationStatistics Valid=145, Invalid=1261, Unknown=0, NotChecked=0, Total=1406 [2021-07-13 19:36:30,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1726 states. [2021-07-13 19:36:30,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1726 to 1667. [2021-07-13 19:36:30,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1667 states, 1666 states have (on average 2.946578631452581) internal successors, (4909), 1666 states have internal predecessors, (4909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:36:30,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1667 states to 1667 states and 4909 transitions. [2021-07-13 19:36:30,702 INFO L78 Accepts]: Start accepts. Automaton has 1667 states and 4909 transitions. Word has length 18 [2021-07-13 19:36:30,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:36:30,702 INFO L482 AbstractCegarLoop]: Abstraction has 1667 states and 4909 transitions. [2021-07-13 19:36:30,702 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:36:30,702 INFO L276 IsEmpty]: Start isEmpty. Operand 1667 states and 4909 transitions. [2021-07-13 19:36:30,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:36:30,704 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:36:30,704 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:36:30,904 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 400 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3493 [2021-07-13 19:36:30,904 INFO L430 AbstractCegarLoop]: === Iteration 410 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:36:30,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:36:30,904 INFO L82 PathProgramCache]: Analyzing trace with hash -54544572, now seen corresponding path program 396 times [2021-07-13 19:36:30,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:36:30,905 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876927854] [2021-07-13 19:36:30,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:36:30,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:36:31,533 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:36:31,534 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:36:31,534 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876927854] [2021-07-13 19:36:31,534 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [876927854] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:36:31,534 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1172514740] [2021-07-13 19:36:31,534 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 401 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 401 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:36:31,565 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:36:31,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:36:31,567 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 53 conjunts are in the unsatisfiable core [2021-07-13 19:36:31,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:36:32,117 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:36:32,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:36:32,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:36:32,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:36:32,120 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:36:32,124 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 26 [2021-07-13 19:36:32,126 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:36:32,129 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:36:32,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:36:32,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:36:32,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:36:32,131 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:36:32,135 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 34 [2021-07-13 19:36:32,137 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:36:32,139 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:36:32,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:36:32,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:36:32,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:36:32,142 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:36:32,146 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 42 [2021-07-13 19:36:32,148 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:36:32,150 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:36:32,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:36:32,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:36:32,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:36:32,153 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 34 [2021-07-13 19:36:32,154 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:36:32,171 INFO L628 ElimStorePlain]: treesize reduction 83, result has 15.3 percent of original size [2021-07-13 19:36:32,171 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:36:32,172 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:36:32,172 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:217, output treesize:11 [2021-07-13 19:36:32,207 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:36:32,207 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1172514740] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:36:32,207 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:36:32,207 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-07-13 19:36:32,207 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757975055] [2021-07-13 19:36:32,207 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 19:36:32,207 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:36:32,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 19:36:32,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=456, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:36:32,208 INFO L87 Difference]: Start difference. First operand 1667 states and 4909 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:36:33,322 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 72 [2021-07-13 19:36:33,618 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 72 [2021-07-13 19:36:33,831 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 71 [2021-07-13 19:36:34,166 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 43 [2021-07-13 19:36:34,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:36:34,182 INFO L93 Difference]: Finished difference Result 1730 states and 5034 transitions. [2021-07-13 19:36:34,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 19:36:34,182 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:36:34,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:36:34,185 INFO L225 Difference]: With dead ends: 1730 [2021-07-13 19:36:34,185 INFO L226 Difference]: Without dead ends: 1722 [2021-07-13 19:36:34,185 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 2517.8ms TimeCoverageRelationStatistics Valid=144, Invalid=1262, Unknown=0, NotChecked=0, Total=1406 [2021-07-13 19:36:34,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1722 states. [2021-07-13 19:36:34,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1722 to 1665. [2021-07-13 19:36:34,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1665 states, 1664 states have (on average 2.9459134615384617) internal successors, (4902), 1664 states have internal predecessors, (4902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:36:34,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1665 states to 1665 states and 4902 transitions. [2021-07-13 19:36:34,205 INFO L78 Accepts]: Start accepts. Automaton has 1665 states and 4902 transitions. Word has length 18 [2021-07-13 19:36:34,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:36:34,205 INFO L482 AbstractCegarLoop]: Abstraction has 1665 states and 4902 transitions. [2021-07-13 19:36:34,205 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:36:34,205 INFO L276 IsEmpty]: Start isEmpty. Operand 1665 states and 4902 transitions. [2021-07-13 19:36:34,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:36:34,207 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:36:34,207 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:36:34,407 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3522,401 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:36:34,407 INFO L430 AbstractCegarLoop]: === Iteration 411 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:36:34,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:36:34,407 INFO L82 PathProgramCache]: Analyzing trace with hash -1148636160, now seen corresponding path program 397 times [2021-07-13 19:36:34,407 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:36:34,408 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825707374] [2021-07-13 19:36:34,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:36:34,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:36:34,600 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:36:34,601 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:36:34,601 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825707374] [2021-07-13 19:36:34,601 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [825707374] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:36:34,601 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [802292413] [2021-07-13 19:36:34,601 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 402 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 402 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:36:34,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:36:34,629 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 53 conjunts are in the unsatisfiable core [2021-07-13 19:36:34,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:36:35,104 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:36:35,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:36:35,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:36:35,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:36:35,107 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:36:35,111 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 34 [2021-07-13 19:36:35,113 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:36:35,115 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:36:35,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:36:35,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:36:35,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:36:35,118 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:36:35,121 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 36 [2021-07-13 19:36:35,123 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:36:35,125 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:36:35,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:36:35,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:36:35,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:36:35,127 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 34 [2021-07-13 19:36:35,129 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:36:35,141 INFO L628 ElimStorePlain]: treesize reduction 72, result has 13.3 percent of original size [2021-07-13 19:36:35,141 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:36:35,141 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:36:35,141 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:170, output treesize:11 [2021-07-13 19:36:35,150 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:36:35,150 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [802292413] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:36:35,150 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:36:35,150 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-07-13 19:36:35,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787562216] [2021-07-13 19:36:35,150 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 19:36:35,151 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:36:35,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 19:36:35,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:36:35,151 INFO L87 Difference]: Start difference. First operand 1665 states and 4902 transitions. Second operand has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:36:35,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:36:35,933 INFO L93 Difference]: Finished difference Result 1814 states and 5191 transitions. [2021-07-13 19:36:35,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:36:35,933 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:36:35,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:36:35,936 INFO L225 Difference]: With dead ends: 1814 [2021-07-13 19:36:35,936 INFO L226 Difference]: Without dead ends: 1811 [2021-07-13 19:36:35,937 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 958.7ms TimeCoverageRelationStatistics Valid=105, Invalid=825, Unknown=0, NotChecked=0, Total=930 [2021-07-13 19:36:35,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1811 states. [2021-07-13 19:36:35,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1811 to 1630. [2021-07-13 19:36:35,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1630 states, 1629 states have (on average 2.9441375076734193) internal successors, (4796), 1629 states have internal predecessors, (4796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:36:35,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1630 states to 1630 states and 4796 transitions. [2021-07-13 19:36:35,959 INFO L78 Accepts]: Start accepts. Automaton has 1630 states and 4796 transitions. Word has length 18 [2021-07-13 19:36:35,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:36:35,959 INFO L482 AbstractCegarLoop]: Abstraction has 1630 states and 4796 transitions. [2021-07-13 19:36:35,959 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:36:35,959 INFO L276 IsEmpty]: Start isEmpty. Operand 1630 states and 4796 transitions. [2021-07-13 19:36:35,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:36:35,961 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:36:35,961 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:36:36,161 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3553,402 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:36:36,161 INFO L430 AbstractCegarLoop]: === Iteration 412 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:36:36,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:36:36,162 INFO L82 PathProgramCache]: Analyzing trace with hash -670707060, now seen corresponding path program 398 times [2021-07-13 19:36:36,162 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:36:36,162 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530144967] [2021-07-13 19:36:36,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:36:36,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:36:36,267 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:36:36,267 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:36:36,267 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530144967] [2021-07-13 19:36:36,267 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1530144967] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:36:36,267 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1891439958] [2021-07-13 19:36:36,267 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 403 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 403 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:36:36,295 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:36:36,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:36:36,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 19:36:36,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:36:36,423 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:36:36,424 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:36:36,425 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:36:36,426 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:36:36,428 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:36:36,429 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:36:36,431 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:36:36,432 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:36:36,434 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:36:36,434 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:36:36,435 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:36:36,436 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:36:36,437 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:36:36,461 INFO L628 ElimStorePlain]: treesize reduction 34, result has 37.0 percent of original size [2021-07-13 19:36:36,461 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:36:36,461 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:36:36,461 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 2 variables, input treesize:107, output treesize:20 [2021-07-13 19:36:36,488 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:36:36,488 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1891439958] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:36:36,488 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:36:36,488 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2021-07-13 19:36:36,488 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081002245] [2021-07-13 19:36:36,488 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:36:36,488 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:36:36,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:36:36,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:36:36,489 INFO L87 Difference]: Start difference. First operand 1630 states and 4796 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:36:36,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:36:36,933 INFO L93 Difference]: Finished difference Result 2344 states and 6637 transitions. [2021-07-13 19:36:36,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 19:36:36,933 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:36:36,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:36:36,936 INFO L225 Difference]: With dead ends: 2344 [2021-07-13 19:36:36,936 INFO L226 Difference]: Without dead ends: 2331 [2021-07-13 19:36:36,936 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 436.3ms TimeCoverageRelationStatistics Valid=121, Invalid=809, Unknown=0, NotChecked=0, Total=930 [2021-07-13 19:36:36,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2331 states. [2021-07-13 19:36:36,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2331 to 1627. [2021-07-13 19:36:36,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1627 states, 1626 states have (on average 2.945879458794588) internal successors, (4790), 1626 states have internal predecessors, (4790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:36:36,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1627 states to 1627 states and 4790 transitions. [2021-07-13 19:36:36,961 INFO L78 Accepts]: Start accepts. Automaton has 1627 states and 4790 transitions. Word has length 19 [2021-07-13 19:36:36,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:36:36,961 INFO L482 AbstractCegarLoop]: Abstraction has 1627 states and 4790 transitions. [2021-07-13 19:36:36,961 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:36:36,961 INFO L276 IsEmpty]: Start isEmpty. Operand 1627 states and 4790 transitions. [2021-07-13 19:36:36,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:36:36,963 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:36:36,963 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:36:37,163 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3585,403 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:36:37,164 INFO L430 AbstractCegarLoop]: === Iteration 413 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:36:37,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:36:37,164 INFO L82 PathProgramCache]: Analyzing trace with hash -1117071366, now seen corresponding path program 399 times [2021-07-13 19:36:37,164 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:36:37,164 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152681140] [2021-07-13 19:36:37,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:36:37,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:36:37,268 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:36:37,268 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:36:37,268 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152681140] [2021-07-13 19:36:37,269 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1152681140] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:36:37,269 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1091906813] [2021-07-13 19:36:37,269 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 404 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 404 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:36:37,301 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 19:36:37,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:36:37,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 19:36:37,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:36:37,426 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:36:37,427 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:36:37,427 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:36:37,429 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:36:37,430 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:36:37,444 INFO L628 ElimStorePlain]: treesize reduction 27, result has 30.8 percent of original size [2021-07-13 19:36:37,445 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:36:37,448 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:36:37,448 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:53, output treesize:12 [2021-07-13 19:36:37,469 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:36:37,469 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1091906813] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:36:37,469 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:36:37,470 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2021-07-13 19:36:37,470 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876350435] [2021-07-13 19:36:37,470 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:36:37,470 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:36:37,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:36:37,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:36:37,470 INFO L87 Difference]: Start difference. First operand 1627 states and 4790 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:36:37,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:36:37,725 INFO L93 Difference]: Finished difference Result 2346 states and 6648 transitions. [2021-07-13 19:36:37,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:36:37,725 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:36:37,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:36:37,728 INFO L225 Difference]: With dead ends: 2346 [2021-07-13 19:36:37,728 INFO L226 Difference]: Without dead ends: 2346 [2021-07-13 19:36:37,728 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 233.2ms TimeCoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:36:37,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2346 states. [2021-07-13 19:36:37,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2346 to 1628. [2021-07-13 19:36:37,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1628 states, 1627 states have (on average 2.945912722802704) internal successors, (4793), 1627 states have internal predecessors, (4793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:36:37,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1628 states to 1628 states and 4793 transitions. [2021-07-13 19:36:37,749 INFO L78 Accepts]: Start accepts. Automaton has 1628 states and 4793 transitions. Word has length 19 [2021-07-13 19:36:37,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:36:37,749 INFO L482 AbstractCegarLoop]: Abstraction has 1628 states and 4793 transitions. [2021-07-13 19:36:37,749 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:36:37,750 INFO L276 IsEmpty]: Start isEmpty. Operand 1628 states and 4793 transitions. [2021-07-13 19:36:37,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:36:37,751 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:36:37,751 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:36:37,952 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3591,404 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:36:37,952 INFO L430 AbstractCegarLoop]: === Iteration 414 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:36:37,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:36:37,952 INFO L82 PathProgramCache]: Analyzing trace with hash 1608725978, now seen corresponding path program 400 times [2021-07-13 19:36:37,952 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:36:37,952 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471333786] [2021-07-13 19:36:37,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:36:37,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:36:38,077 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:36:38,077 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:36:38,077 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471333786] [2021-07-13 19:36:38,077 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1471333786] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:36:38,077 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1288333046] [2021-07-13 19:36:38,077 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 405 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 405 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:36:38,104 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:36:38,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:36:38,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 19:36:38,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:36:38,247 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:36:38,247 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:36:38,248 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:36:38,249 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:36:38,251 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:36:38,251 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:36:38,251 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:36:38,252 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:36:38,254 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:36:38,255 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:36:38,255 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:36:38,255 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:36:38,257 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:36:38,258 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:36:38,258 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:36:38,300 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-07-13 19:36:38,300 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:36:38,301 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:36:38,301 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-07-13 19:36:38,364 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:36:38,364 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1288333046] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:36:38,364 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:36:38,364 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-07-13 19:36:38,364 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125182871] [2021-07-13 19:36:38,364 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 19:36:38,364 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:36:38,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 19:36:38,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:36:38,365 INFO L87 Difference]: Start difference. First operand 1628 states and 4793 transitions. Second operand has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:36:38,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:36:38,755 INFO L93 Difference]: Finished difference Result 2429 states and 6790 transitions. [2021-07-13 19:36:38,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:36:38,755 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:36:38,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:36:38,758 INFO L225 Difference]: With dead ends: 2429 [2021-07-13 19:36:38,758 INFO L226 Difference]: Without dead ends: 2429 [2021-07-13 19:36:38,758 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 376.7ms TimeCoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:36:38,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2429 states. [2021-07-13 19:36:38,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2429 to 1643. [2021-07-13 19:36:38,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1643 states, 1642 states have (on average 2.949451887941535) internal successors, (4843), 1642 states have internal predecessors, (4843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:36:38,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1643 states to 1643 states and 4843 transitions. [2021-07-13 19:36:38,780 INFO L78 Accepts]: Start accepts. Automaton has 1643 states and 4843 transitions. Word has length 19 [2021-07-13 19:36:38,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:36:38,781 INFO L482 AbstractCegarLoop]: Abstraction has 1643 states and 4843 transitions. [2021-07-13 19:36:38,781 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:36:38,781 INFO L276 IsEmpty]: Start isEmpty. Operand 1643 states and 4843 transitions. [2021-07-13 19:36:38,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:36:38,782 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:36:38,783 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:36:38,983 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 405 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3593 [2021-07-13 19:36:38,983 INFO L430 AbstractCegarLoop]: === Iteration 415 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:36:38,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:36:38,983 INFO L82 PathProgramCache]: Analyzing trace with hash -1884625090, now seen corresponding path program 401 times [2021-07-13 19:36:38,983 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:36:38,983 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669595061] [2021-07-13 19:36:38,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:36:38,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:36:39,106 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:36:39,107 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:36:39,107 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669595061] [2021-07-13 19:36:39,107 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [669595061] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:36:39,107 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1285522349] [2021-07-13 19:36:39,107 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 406 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 406 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:36:39,135 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-13 19:36:39,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:36:39,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 19:36:39,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:36:39,273 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:36:39,274 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:36:39,274 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:36:39,275 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:36:39,277 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:36:39,277 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:36:39,277 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:36:39,278 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:36:39,280 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:36:39,281 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:36:39,281 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:36:39,281 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:36:39,283 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:36:39,284 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:36:39,284 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:36:39,316 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-07-13 19:36:39,316 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:36:39,317 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:36:39,317 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-07-13 19:36:39,389 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:36:39,389 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1285522349] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:36:39,389 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:36:39,389 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-07-13 19:36:39,389 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47929771] [2021-07-13 19:36:39,390 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 19:36:39,390 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:36:39,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 19:36:39,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:36:39,390 INFO L87 Difference]: Start difference. First operand 1643 states and 4843 transitions. Second operand has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:36:40,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:36:40,652 INFO L93 Difference]: Finished difference Result 2455 states and 6834 transitions. [2021-07-13 19:36:40,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-07-13 19:36:40,652 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:36:40,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:36:40,656 INFO L225 Difference]: With dead ends: 2455 [2021-07-13 19:36:40,659 INFO L226 Difference]: Without dead ends: 2444 [2021-07-13 19:36:40,659 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 488 ImplicationChecksByTransitivity, 1044.7ms TimeCoverageRelationStatistics Valid=233, Invalid=1929, Unknown=0, NotChecked=0, Total=2162 [2021-07-13 19:36:40,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2444 states. [2021-07-13 19:36:40,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2444 to 1649. [2021-07-13 19:36:40,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1649 states, 1648 states have (on average 2.949635922330097) internal successors, (4861), 1648 states have internal predecessors, (4861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:36:40,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1649 states to 1649 states and 4861 transitions. [2021-07-13 19:36:40,689 INFO L78 Accepts]: Start accepts. Automaton has 1649 states and 4861 transitions. Word has length 19 [2021-07-13 19:36:40,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:36:40,689 INFO L482 AbstractCegarLoop]: Abstraction has 1649 states and 4861 transitions. [2021-07-13 19:36:40,690 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:36:40,690 INFO L276 IsEmpty]: Start isEmpty. Operand 1649 states and 4861 transitions. [2021-07-13 19:36:40,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:36:40,691 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:36:40,692 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:36:40,892 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3597,406 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:36:40,892 INFO L430 AbstractCegarLoop]: === Iteration 416 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:36:40,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:36:40,892 INFO L82 PathProgramCache]: Analyzing trace with hash -166281384, now seen corresponding path program 402 times [2021-07-13 19:36:40,892 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:36:40,892 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409731150] [2021-07-13 19:36:40,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:36:40,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:36:41,014 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:36:41,014 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:36:41,014 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409731150] [2021-07-13 19:36:41,014 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [409731150] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:36:41,014 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2025045016] [2021-07-13 19:36:41,014 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 407 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 407 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:36:41,044 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-13 19:36:41,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:36:41,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 19:36:41,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:36:41,182 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:36:41,182 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:36:41,182 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:36:41,183 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:36:41,185 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:36:41,186 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:36:41,186 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:36:41,187 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:36:41,189 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:36:41,189 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:36:41,189 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:36:41,190 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:36:41,192 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:36:41,192 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:36:41,193 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:36:41,225 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-07-13 19:36:41,225 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:36:41,225 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:36:41,225 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-07-13 19:36:41,277 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:36:41,277 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2025045016] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:36:41,277 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:36:41,277 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-07-13 19:36:41,277 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189024198] [2021-07-13 19:36:41,277 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 19:36:41,277 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:36:41,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 19:36:41,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:36:41,278 INFO L87 Difference]: Start difference. First operand 1649 states and 4861 transitions. Second operand has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:36:42,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:36:42,044 INFO L93 Difference]: Finished difference Result 2425 states and 6791 transitions. [2021-07-13 19:36:42,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-13 19:36:42,044 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:36:42,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:36:42,048 INFO L225 Difference]: With dead ends: 2425 [2021-07-13 19:36:42,048 INFO L226 Difference]: Without dead ends: 2425 [2021-07-13 19:36:42,048 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 651.7ms TimeCoverageRelationStatistics Valid=151, Invalid=1109, Unknown=0, NotChecked=0, Total=1260 [2021-07-13 19:36:42,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2425 states. [2021-07-13 19:36:42,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2425 to 1644. [2021-07-13 19:36:42,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1644 states, 1643 states have (on average 2.945830797321972) internal successors, (4840), 1643 states have internal predecessors, (4840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:36:42,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1644 states to 1644 states and 4840 transitions. [2021-07-13 19:36:42,071 INFO L78 Accepts]: Start accepts. Automaton has 1644 states and 4840 transitions. Word has length 19 [2021-07-13 19:36:42,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:36:42,071 INFO L482 AbstractCegarLoop]: Abstraction has 1644 states and 4840 transitions. [2021-07-13 19:36:42,072 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:36:42,072 INFO L276 IsEmpty]: Start isEmpty. Operand 1644 states and 4840 transitions. [2021-07-13 19:36:42,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:36:42,073 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:36:42,073 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:36:42,274 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 407 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3602 [2021-07-13 19:36:42,274 INFO L430 AbstractCegarLoop]: === Iteration 417 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:36:42,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:36:42,274 INFO L82 PathProgramCache]: Analyzing trace with hash -1876894692, now seen corresponding path program 403 times [2021-07-13 19:36:42,274 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:36:42,274 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427965857] [2021-07-13 19:36:42,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:36:42,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:36:42,388 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:36:42,389 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:36:42,389 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427965857] [2021-07-13 19:36:42,389 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [427965857] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:36:42,389 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [681982188] [2021-07-13 19:36:42,389 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 408 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 408 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:36:42,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:36:42,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 19:36:42,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:36:42,590 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:36:42,590 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:36:42,590 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:36:42,591 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:36:42,593 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:36:42,593 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:36:42,594 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:36:42,616 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-07-13 19:36:42,616 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:36:42,617 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:36:42,617 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-07-13 19:36:42,639 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:36:42,639 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [681982188] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:36:42,639 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:36:42,639 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-07-13 19:36:42,639 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135570703] [2021-07-13 19:36:42,640 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 19:36:42,640 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:36:42,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 19:36:42,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:36:42,640 INFO L87 Difference]: Start difference. First operand 1644 states and 4840 transitions. Second operand has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:36:43,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:36:43,415 INFO L93 Difference]: Finished difference Result 2501 states and 6947 transitions. [2021-07-13 19:36:43,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-07-13 19:36:43,416 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:36:43,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:36:43,420 INFO L225 Difference]: With dead ends: 2501 [2021-07-13 19:36:43,420 INFO L226 Difference]: Without dead ends: 2501 [2021-07-13 19:36:43,420 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 369 ImplicationChecksByTransitivity, 688.9ms TimeCoverageRelationStatistics Valid=192, Invalid=1530, Unknown=0, NotChecked=0, Total=1722 [2021-07-13 19:36:43,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2501 states. [2021-07-13 19:36:43,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2501 to 1656. [2021-07-13 19:36:43,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1656 states, 1655 states have (on average 2.950453172205438) internal successors, (4883), 1655 states have internal predecessors, (4883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:36:43,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1656 states to 1656 states and 4883 transitions. [2021-07-13 19:36:43,446 INFO L78 Accepts]: Start accepts. Automaton has 1656 states and 4883 transitions. Word has length 19 [2021-07-13 19:36:43,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:36:43,446 INFO L482 AbstractCegarLoop]: Abstraction has 1656 states and 4883 transitions. [2021-07-13 19:36:43,446 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:36:43,446 INFO L276 IsEmpty]: Start isEmpty. Operand 1656 states and 4883 transitions. [2021-07-13 19:36:43,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:36:43,448 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:36:43,448 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:36:43,649 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3606,408 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:36:43,649 INFO L430 AbstractCegarLoop]: === Iteration 418 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:36:43,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:36:43,649 INFO L82 PathProgramCache]: Analyzing trace with hash 928667608, now seen corresponding path program 404 times [2021-07-13 19:36:43,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:36:43,649 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599939992] [2021-07-13 19:36:43,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:36:43,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:36:43,765 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:36:43,765 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:36:43,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599939992] [2021-07-13 19:36:43,765 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [599939992] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:36:43,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [857179945] [2021-07-13 19:36:43,765 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 409 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 409 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:36:43,793 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:36:43,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:36:43,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 19:36:43,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:36:43,960 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:36:43,961 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:36:43,961 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:36:43,962 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:36:43,964 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:36:43,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:36:43,965 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:36:43,988 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-07-13 19:36:43,988 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:36:43,989 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:36:43,989 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-07-13 19:36:44,013 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:36:44,013 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [857179945] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:36:44,013 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:36:44,013 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-07-13 19:36:44,013 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898540929] [2021-07-13 19:36:44,013 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 19:36:44,013 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:36:44,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 19:36:44,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=330, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:36:44,014 INFO L87 Difference]: Start difference. First operand 1656 states and 4883 transitions. Second operand has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:36:45,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:36:45,424 INFO L93 Difference]: Finished difference Result 2631 states and 7221 transitions. [2021-07-13 19:36:45,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-07-13 19:36:45,424 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:36:45,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:36:45,428 INFO L225 Difference]: With dead ends: 2631 [2021-07-13 19:36:45,428 INFO L226 Difference]: Without dead ends: 2631 [2021-07-13 19:36:45,428 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1083 ImplicationChecksByTransitivity, 1257.4ms TimeCoverageRelationStatistics Valid=400, Invalid=3382, Unknown=0, NotChecked=0, Total=3782 [2021-07-13 19:36:45,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2631 states. [2021-07-13 19:36:45,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2631 to 1677. [2021-07-13 19:36:45,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1677 states, 1676 states have (on average 2.95763723150358) internal successors, (4957), 1676 states have internal predecessors, (4957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:36:45,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1677 states to 1677 states and 4957 transitions. [2021-07-13 19:36:45,454 INFO L78 Accepts]: Start accepts. Automaton has 1677 states and 4957 transitions. Word has length 19 [2021-07-13 19:36:45,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:36:45,454 INFO L482 AbstractCegarLoop]: Abstraction has 1677 states and 4957 transitions. [2021-07-13 19:36:45,454 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:36:45,454 INFO L276 IsEmpty]: Start isEmpty. Operand 1677 states and 4957 transitions. [2021-07-13 19:36:45,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:36:45,457 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:36:45,457 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:36:45,673 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 409 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3609 [2021-07-13 19:36:45,674 INFO L430 AbstractCegarLoop]: === Iteration 419 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:36:45,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:36:45,674 INFO L82 PathProgramCache]: Analyzing trace with hash 2001752988, now seen corresponding path program 405 times [2021-07-13 19:36:45,674 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:36:45,674 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434044722] [2021-07-13 19:36:45,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:36:45,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:36:45,787 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:36:45,788 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:36:45,788 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434044722] [2021-07-13 19:36:45,788 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [434044722] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:36:45,788 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [878556013] [2021-07-13 19:36:45,788 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 410 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 410 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:36:45,816 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 19:36:45,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:36:45,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 19:36:45,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:36:45,977 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:36:45,978 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:36:45,978 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:36:45,979 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:36:45,981 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:36:45,981 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:36:45,982 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:36:46,003 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-07-13 19:36:46,003 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:36:46,004 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:36:46,004 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-07-13 19:36:46,026 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:36:46,026 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [878556013] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:36:46,027 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:36:46,027 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-07-13 19:36:46,027 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244088009] [2021-07-13 19:36:46,027 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 19:36:46,027 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:36:46,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 19:36:46,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=332, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:36:46,027 INFO L87 Difference]: Start difference. First operand 1677 states and 4957 transitions. Second operand has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:36:46,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:36:46,824 INFO L93 Difference]: Finished difference Result 2498 states and 7046 transitions. [2021-07-13 19:36:46,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-13 19:36:46,824 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:36:46,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:36:46,827 INFO L225 Difference]: With dead ends: 2498 [2021-07-13 19:36:46,827 INFO L226 Difference]: Without dead ends: 2498 [2021-07-13 19:36:46,827 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 724.7ms TimeCoverageRelationStatistics Valid=188, Invalid=1218, Unknown=0, NotChecked=0, Total=1406 [2021-07-13 19:36:46,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2498 states. [2021-07-13 19:36:46,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2498 to 1679. [2021-07-13 19:36:46,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1679 states, 1678 states have (on average 2.957687723480334) internal successors, (4963), 1678 states have internal predecessors, (4963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:36:46,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1679 states to 1679 states and 4963 transitions. [2021-07-13 19:36:46,849 INFO L78 Accepts]: Start accepts. Automaton has 1679 states and 4963 transitions. Word has length 19 [2021-07-13 19:36:46,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:36:46,849 INFO L482 AbstractCegarLoop]: Abstraction has 1679 states and 4963 transitions. [2021-07-13 19:36:46,849 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:36:46,849 INFO L276 IsEmpty]: Start isEmpty. Operand 1679 states and 4963 transitions. [2021-07-13 19:36:46,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:36:46,851 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:36:46,851 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:36:47,051 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3612,410 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:36:47,051 INFO L430 AbstractCegarLoop]: === Iteration 420 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:36:47,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:36:47,051 INFO L82 PathProgramCache]: Analyzing trace with hash 907661400, now seen corresponding path program 406 times [2021-07-13 19:36:47,052 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:36:47,052 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439339350] [2021-07-13 19:36:47,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:36:47,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:36:47,195 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:36:47,196 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:36:47,196 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439339350] [2021-07-13 19:36:47,196 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1439339350] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:36:47,196 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1415318032] [2021-07-13 19:36:47,196 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 411 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 411 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:36:47,228 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:36:47,229 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:36:47,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 19:36:47,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:36:47,392 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:36:47,393 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:36:47,393 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:36:47,394 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:36:47,396 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:36:47,396 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:36:47,397 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:36:47,418 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-07-13 19:36:47,418 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:36:47,419 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:36:47,419 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-07-13 19:36:47,442 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:36:47,442 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1415318032] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:36:47,442 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:36:47,442 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-07-13 19:36:47,442 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115104208] [2021-07-13 19:36:47,442 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 19:36:47,442 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:36:47,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 19:36:47,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:36:47,443 INFO L87 Difference]: Start difference. First operand 1679 states and 4963 transitions. Second operand has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:36:47,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:36:47,689 INFO L93 Difference]: Finished difference Result 2398 states and 6821 transitions. [2021-07-13 19:36:47,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:36:47,690 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:36:47,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:36:47,693 INFO L225 Difference]: With dead ends: 2398 [2021-07-13 19:36:47,693 INFO L226 Difference]: Without dead ends: 2398 [2021-07-13 19:36:47,693 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 254.6ms TimeCoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:36:47,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2398 states. [2021-07-13 19:36:47,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2398 to 1679. [2021-07-13 19:36:47,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1679 states, 1678 states have (on average 2.957687723480334) internal successors, (4963), 1678 states have internal predecessors, (4963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:36:47,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1679 states to 1679 states and 4963 transitions. [2021-07-13 19:36:47,715 INFO L78 Accepts]: Start accepts. Automaton has 1679 states and 4963 transitions. Word has length 19 [2021-07-13 19:36:47,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:36:47,715 INFO L482 AbstractCegarLoop]: Abstraction has 1679 states and 4963 transitions. [2021-07-13 19:36:47,715 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:36:47,715 INFO L276 IsEmpty]: Start isEmpty. Operand 1679 states and 4963 transitions. [2021-07-13 19:36:47,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:36:47,717 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:36:47,717 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:36:47,917 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3615,411 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:36:47,917 INFO L430 AbstractCegarLoop]: === Iteration 421 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:36:47,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:36:47,917 INFO L82 PathProgramCache]: Analyzing trace with hash -2048945378, now seen corresponding path program 407 times [2021-07-13 19:36:47,918 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:36:47,918 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121643840] [2021-07-13 19:36:47,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:36:47,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:36:48,015 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:36:48,015 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:36:48,015 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121643840] [2021-07-13 19:36:48,015 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2121643840] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:36:48,015 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [853934427] [2021-07-13 19:36:48,015 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 412 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 412 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:36:48,045 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-13 19:36:48,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:36:48,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 19:36:48,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:36:48,166 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:36:48,167 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:36:48,168 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:36:48,168 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:36:48,170 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:36:48,170 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:36:48,171 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:36:48,188 INFO L628 ElimStorePlain]: treesize reduction 30, result has 33.3 percent of original size [2021-07-13 19:36:48,188 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:36:48,189 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:36:48,189 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:59, output treesize:15 [2021-07-13 19:36:48,212 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:36:48,212 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [853934427] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:36:48,212 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:36:48,212 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-07-13 19:36:48,212 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380296933] [2021-07-13 19:36:48,212 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 19:36:48,212 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:36:48,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 19:36:48,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=330, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:36:48,213 INFO L87 Difference]: Start difference. First operand 1679 states and 4963 transitions. Second operand has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:36:48,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:36:48,856 INFO L93 Difference]: Finished difference Result 2275 states and 6399 transitions. [2021-07-13 19:36:48,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-13 19:36:48,857 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:36:48,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:36:48,860 INFO L225 Difference]: With dead ends: 2275 [2021-07-13 19:36:48,860 INFO L226 Difference]: Without dead ends: 2275 [2021-07-13 19:36:48,860 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 382.4ms TimeCoverageRelationStatistics Valid=110, Invalid=1080, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 19:36:48,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2275 states. [2021-07-13 19:36:48,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2275 to 1869. [2021-07-13 19:36:48,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1869 states, 1868 states have (on average 2.975374732334047) internal successors, (5558), 1868 states have internal predecessors, (5558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:36:48,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1869 states to 1869 states and 5558 transitions. [2021-07-13 19:36:48,884 INFO L78 Accepts]: Start accepts. Automaton has 1869 states and 5558 transitions. Word has length 19 [2021-07-13 19:36:48,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:36:48,884 INFO L482 AbstractCegarLoop]: Abstraction has 1869 states and 5558 transitions. [2021-07-13 19:36:48,884 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:36:48,884 INFO L276 IsEmpty]: Start isEmpty. Operand 1869 states and 5558 transitions. [2021-07-13 19:36:48,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:36:48,886 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:36:48,886 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:36:49,087 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 412 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3618 [2021-07-13 19:36:49,087 INFO L430 AbstractCegarLoop]: === Iteration 422 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:36:49,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:36:49,087 INFO L82 PathProgramCache]: Analyzing trace with hash 1326321210, now seen corresponding path program 408 times [2021-07-13 19:36:49,087 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:36:49,088 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511527838] [2021-07-13 19:36:49,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:36:49,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:36:49,185 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:36:49,185 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:36:49,185 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511527838] [2021-07-13 19:36:49,186 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1511527838] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:36:49,186 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [599414336] [2021-07-13 19:36:49,186 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 413 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 413 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:36:49,214 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-13 19:36:49,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:36:49,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 19:36:49,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:36:49,343 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:36:49,344 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:36:49,344 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:36:49,345 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:36:49,347 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:36:49,348 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:36:49,348 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:36:49,348 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:36:49,350 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:36:49,351 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:36:49,353 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:36:49,354 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:36:49,355 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:36:49,356 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:36:49,358 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:36:49,358 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:36:49,385 INFO L628 ElimStorePlain]: treesize reduction 21, result has 58.0 percent of original size [2021-07-13 19:36:49,385 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:36:49,386 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:36:49,386 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 2 variables, input treesize:125, output treesize:29 [2021-07-13 19:36:49,418 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:36:49,419 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [599414336] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:36:49,419 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:36:49,419 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-07-13 19:36:49,419 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714529270] [2021-07-13 19:36:49,419 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 19:36:49,419 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:36:49,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 19:36:49,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=330, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:36:49,419 INFO L87 Difference]: Start difference. First operand 1869 states and 5558 transitions. Second operand has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:36:50,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:36:50,059 INFO L93 Difference]: Finished difference Result 2176 states and 6183 transitions. [2021-07-13 19:36:50,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-13 19:36:50,059 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:36:50,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:36:50,062 INFO L225 Difference]: With dead ends: 2176 [2021-07-13 19:36:50,062 INFO L226 Difference]: Without dead ends: 2172 [2021-07-13 19:36:50,062 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 497.6ms TimeCoverageRelationStatistics Valid=143, Invalid=1339, Unknown=0, NotChecked=0, Total=1482 [2021-07-13 19:36:50,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2172 states. [2021-07-13 19:36:50,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2172 to 1869. [2021-07-13 19:36:50,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1869 states, 1868 states have (on average 2.96948608137045) internal successors, (5547), 1868 states have internal predecessors, (5547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:36:50,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1869 states to 1869 states and 5547 transitions. [2021-07-13 19:36:50,084 INFO L78 Accepts]: Start accepts. Automaton has 1869 states and 5547 transitions. Word has length 19 [2021-07-13 19:36:50,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:36:50,084 INFO L482 AbstractCegarLoop]: Abstraction has 1869 states and 5547 transitions. [2021-07-13 19:36:50,084 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:36:50,084 INFO L276 IsEmpty]: Start isEmpty. Operand 1869 states and 5547 transitions. [2021-07-13 19:36:50,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:36:50,086 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:36:50,086 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:36:50,287 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3620,413 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:36:50,287 INFO L430 AbstractCegarLoop]: === Iteration 423 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:36:50,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:36:50,287 INFO L82 PathProgramCache]: Analyzing trace with hash -2041214980, now seen corresponding path program 409 times [2021-07-13 19:36:50,287 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:36:50,287 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740012492] [2021-07-13 19:36:50,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:36:50,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:36:50,388 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:36:50,388 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:36:50,388 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740012492] [2021-07-13 19:36:50,388 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [740012492] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:36:50,388 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [920455959] [2021-07-13 19:36:50,388 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 414 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 414 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:36:50,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:36:50,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 19:36:50,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:36:50,522 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:36:50,523 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:36:50,523 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:36:50,524 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:36:50,526 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:36:50,526 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:36:50,526 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:36:50,527 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:36:50,529 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:36:50,530 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:36:50,530 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:36:50,531 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:36:50,533 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:36:50,533 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:36:50,533 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:36:50,566 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-07-13 19:36:50,566 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:36:50,567 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:36:50,567 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-07-13 19:36:50,621 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:36:50,621 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [920455959] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:36:50,621 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:36:50,621 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-07-13 19:36:50,621 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351694690] [2021-07-13 19:36:50,622 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 19:36:50,622 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:36:50,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 19:36:50,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=330, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:36:50,622 INFO L87 Difference]: Start difference. First operand 1869 states and 5547 transitions. Second operand has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:36:51,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:36:51,297 INFO L93 Difference]: Finished difference Result 2281 states and 6397 transitions. [2021-07-13 19:36:51,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-07-13 19:36:51,297 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:36:51,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:36:51,300 INFO L225 Difference]: With dead ends: 2281 [2021-07-13 19:36:51,300 INFO L226 Difference]: Without dead ends: 2280 [2021-07-13 19:36:51,300 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 291 ImplicationChecksByTransitivity, 476.3ms TimeCoverageRelationStatistics Valid=137, Invalid=1269, Unknown=0, NotChecked=0, Total=1406 [2021-07-13 19:36:51,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2280 states. [2021-07-13 19:36:51,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2280 to 1877. [2021-07-13 19:36:51,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1877 states, 1876 states have (on average 2.9738805970149254) internal successors, (5579), 1876 states have internal predecessors, (5579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:36:51,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1877 states to 1877 states and 5579 transitions. [2021-07-13 19:36:51,325 INFO L78 Accepts]: Start accepts. Automaton has 1877 states and 5579 transitions. Word has length 19 [2021-07-13 19:36:51,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:36:51,326 INFO L482 AbstractCegarLoop]: Abstraction has 1877 states and 5579 transitions. [2021-07-13 19:36:51,326 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:36:51,326 INFO L276 IsEmpty]: Start isEmpty. Operand 1877 states and 5579 transitions. [2021-07-13 19:36:51,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:36:51,328 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:36:51,328 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:36:51,528 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 414 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3625 [2021-07-13 19:36:51,528 INFO L430 AbstractCegarLoop]: === Iteration 424 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:36:51,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:36:51,528 INFO L82 PathProgramCache]: Analyzing trace with hash -1239598752, now seen corresponding path program 410 times [2021-07-13 19:36:51,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:36:51,529 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410526766] [2021-07-13 19:36:51,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:36:51,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:36:51,630 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:36:51,630 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:36:51,630 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410526766] [2021-07-13 19:36:51,631 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [410526766] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:36:51,631 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2072933648] [2021-07-13 19:36:51,631 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 415 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 415 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:36:51,660 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:36:51,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:36:51,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 19:36:51,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:36:51,762 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:36:51,762 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:36:51,763 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:36:51,764 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:36:51,766 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:36:51,766 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:36:51,766 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:36:51,767 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:36:51,769 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:36:51,769 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:36:51,770 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:36:51,770 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:36:51,772 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:36:51,772 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:36:51,773 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:36:51,805 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-07-13 19:36:51,805 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:36:51,806 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:36:51,806 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-07-13 19:36:51,889 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:36:51,889 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2072933648] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:36:51,889 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:36:51,889 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-07-13 19:36:51,890 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259061234] [2021-07-13 19:36:51,890 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 19:36:51,890 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:36:51,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 19:36:51,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=330, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:36:51,890 INFO L87 Difference]: Start difference. First operand 1877 states and 5579 transitions. Second operand has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:36:52,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:36:52,854 INFO L93 Difference]: Finished difference Result 2324 states and 6523 transitions. [2021-07-13 19:36:52,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-07-13 19:36:52,854 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:36:52,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:36:52,857 INFO L225 Difference]: With dead ends: 2324 [2021-07-13 19:36:52,857 INFO L226 Difference]: Without dead ends: 2320 [2021-07-13 19:36:52,857 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 635 ImplicationChecksByTransitivity, 819.7ms TimeCoverageRelationStatistics Valid=240, Invalid=2210, Unknown=0, NotChecked=0, Total=2450 [2021-07-13 19:36:52,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2320 states. [2021-07-13 19:36:52,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2320 to 1900. [2021-07-13 19:36:52,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1900 states, 1899 states have (on average 2.9768299104791995) internal successors, (5653), 1899 states have internal predecessors, (5653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:36:52,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1900 states to 1900 states and 5653 transitions. [2021-07-13 19:36:52,880 INFO L78 Accepts]: Start accepts. Automaton has 1900 states and 5653 transitions. Word has length 19 [2021-07-13 19:36:52,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:36:52,880 INFO L482 AbstractCegarLoop]: Abstraction has 1900 states and 5653 transitions. [2021-07-13 19:36:52,880 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:36:52,880 INFO L276 IsEmpty]: Start isEmpty. Operand 1900 states and 5653 transitions. [2021-07-13 19:36:52,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:36:52,882 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:36:52,882 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:36:53,083 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 415 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3629 [2021-07-13 19:36:53,083 INFO L430 AbstractCegarLoop]: === Iteration 425 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:36:53,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:36:53,083 INFO L82 PathProgramCache]: Analyzing trace with hash 478744954, now seen corresponding path program 411 times [2021-07-13 19:36:53,083 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:36:53,084 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885431549] [2021-07-13 19:36:53,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:36:53,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:36:53,203 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:36:53,203 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:36:53,203 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885431549] [2021-07-13 19:36:53,203 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1885431549] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:36:53,203 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [170468956] [2021-07-13 19:36:53,203 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 416 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 416 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:36:53,234 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-13 19:36:53,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:36:53,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 19:36:53,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:36:53,340 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:36:53,340 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:36:53,341 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:36:53,342 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:36:53,344 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:36:53,344 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:36:53,344 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:36:53,345 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:36:53,347 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:36:53,347 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:36:53,348 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:36:53,348 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:36:53,353 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:36:53,353 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:36:53,354 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:36:53,389 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-07-13 19:36:53,389 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:36:53,390 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:36:53,390 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-07-13 19:36:53,442 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:36:53,442 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [170468956] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:36:53,442 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:36:53,442 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-07-13 19:36:53,442 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891859498] [2021-07-13 19:36:53,442 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 19:36:53,442 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:36:53,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 19:36:53,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=330, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:36:53,443 INFO L87 Difference]: Start difference. First operand 1900 states and 5653 transitions. Second operand has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:36:54,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:36:54,242 INFO L93 Difference]: Finished difference Result 2307 states and 6474 transitions. [2021-07-13 19:36:54,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-07-13 19:36:54,243 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:36:54,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:36:54,246 INFO L225 Difference]: With dead ends: 2307 [2021-07-13 19:36:54,246 INFO L226 Difference]: Without dead ends: 2307 [2021-07-13 19:36:54,246 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 416 ImplicationChecksByTransitivity, 689.2ms TimeCoverageRelationStatistics Valid=208, Invalid=1598, Unknown=0, NotChecked=0, Total=1806 [2021-07-13 19:36:54,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2307 states. [2021-07-13 19:36:54,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2307 to 1863. [2021-07-13 19:36:54,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1863 states, 1862 states have (on average 2.9667024704618687) internal successors, (5524), 1862 states have internal predecessors, (5524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:36:54,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1863 states to 1863 states and 5524 transitions. [2021-07-13 19:36:54,271 INFO L78 Accepts]: Start accepts. Automaton has 1863 states and 5524 transitions. Word has length 19 [2021-07-13 19:36:54,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:36:54,271 INFO L482 AbstractCegarLoop]: Abstraction has 1863 states and 5524 transitions. [2021-07-13 19:36:54,271 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:36:54,271 INFO L276 IsEmpty]: Start isEmpty. Operand 1863 states and 5524 transitions. [2021-07-13 19:36:54,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:36:54,273 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:36:54,273 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:36:54,474 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3634,416 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:36:54,474 INFO L430 AbstractCegarLoop]: === Iteration 426 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:36:54,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:36:54,474 INFO L82 PathProgramCache]: Analyzing trace with hash -1923098790, now seen corresponding path program 412 times [2021-07-13 19:36:54,474 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:36:54,474 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500166592] [2021-07-13 19:36:54,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:36:54,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:36:54,640 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:36:54,640 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:36:54,640 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500166592] [2021-07-13 19:36:54,640 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [500166592] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:36:54,640 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [727546958] [2021-07-13 19:36:54,641 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 417 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 417 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:36:54,668 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:36:54,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:36:54,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 19:36:54,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:36:54,770 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:36:54,770 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:36:54,770 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:36:54,771 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:36:54,773 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:36:54,774 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:36:54,774 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:36:54,775 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:36:54,777 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:36:54,777 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:36:54,777 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:36:54,778 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:36:54,780 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:36:54,780 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:36:54,781 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:36:54,813 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-07-13 19:36:54,813 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:36:54,814 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:36:54,814 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-07-13 19:36:54,879 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:36:54,880 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [727546958] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:36:54,880 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:36:54,880 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-07-13 19:36:54,880 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365256931] [2021-07-13 19:36:54,880 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 19:36:54,880 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:36:54,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 19:36:54,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:36:54,880 INFO L87 Difference]: Start difference. First operand 1863 states and 5524 transitions. Second operand has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:36:55,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:36:55,822 INFO L93 Difference]: Finished difference Result 2314 states and 6477 transitions. [2021-07-13 19:36:55,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-07-13 19:36:55,822 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:36:55,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:36:55,826 INFO L225 Difference]: With dead ends: 2314 [2021-07-13 19:36:55,826 INFO L226 Difference]: Without dead ends: 2309 [2021-07-13 19:36:55,826 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 804 ImplicationChecksByTransitivity, 782.8ms TimeCoverageRelationStatistics Valid=242, Invalid=2620, Unknown=0, NotChecked=0, Total=2862 [2021-07-13 19:36:55,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2309 states. [2021-07-13 19:36:55,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2309 to 1904. [2021-07-13 19:36:55,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1904 states, 1903 states have (on average 2.974776668418287) internal successors, (5661), 1903 states have internal predecessors, (5661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:36:55,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1904 states to 1904 states and 5661 transitions. [2021-07-13 19:36:55,862 INFO L78 Accepts]: Start accepts. Automaton has 1904 states and 5661 transitions. Word has length 19 [2021-07-13 19:36:55,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:36:55,862 INFO L482 AbstractCegarLoop]: Abstraction has 1904 states and 5661 transitions. [2021-07-13 19:36:55,862 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:36:55,862 INFO L276 IsEmpty]: Start isEmpty. Operand 1904 states and 5661 transitions. [2021-07-13 19:36:55,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:36:55,865 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:36:55,865 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:36:56,065 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 417 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3638 [2021-07-13 19:36:56,065 INFO L430 AbstractCegarLoop]: === Iteration 427 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:36:56,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:36:56,065 INFO L82 PathProgramCache]: Analyzing trace with hash -194051456, now seen corresponding path program 413 times [2021-07-13 19:36:56,066 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:36:56,066 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623934881] [2021-07-13 19:36:56,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:36:56,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:36:56,173 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:36:56,173 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:36:56,173 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623934881] [2021-07-13 19:36:56,173 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1623934881] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:36:56,173 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1124343397] [2021-07-13 19:36:56,173 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 418 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 418 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:36:56,204 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:36:56,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:36:56,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 19:36:56,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:36:56,354 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:36:56,355 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:36:56,357 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:36:56,358 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:36:56,360 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:36:56,360 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:36:56,361 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:36:56,361 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:36:56,364 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:36:56,364 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:36:56,367 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:36:56,367 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:36:56,369 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:36:56,370 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:36:56,371 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:36:56,400 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-07-13 19:36:56,400 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:36:56,401 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:36:56,401 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-07-13 19:36:56,429 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:36:56,429 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1124343397] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:36:56,429 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:36:56,429 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-07-13 19:36:56,429 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647843327] [2021-07-13 19:36:56,429 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 19:36:56,429 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:36:56,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 19:36:56,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=330, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:36:56,430 INFO L87 Difference]: Start difference. First operand 1904 states and 5661 transitions. Second operand has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:36:57,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:36:57,140 INFO L93 Difference]: Finished difference Result 2210 states and 6281 transitions. [2021-07-13 19:36:57,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-07-13 19:36:57,141 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:36:57,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:36:57,143 INFO L225 Difference]: With dead ends: 2210 [2021-07-13 19:36:57,143 INFO L226 Difference]: Without dead ends: 2202 [2021-07-13 19:36:57,144 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 397 ImplicationChecksByTransitivity, 524.6ms TimeCoverageRelationStatistics Valid=158, Invalid=1564, Unknown=0, NotChecked=0, Total=1722 [2021-07-13 19:36:57,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2202 states. [2021-07-13 19:36:57,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2202 to 1908. [2021-07-13 19:36:57,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1908 states, 1907 states have (on average 2.966439433665443) internal successors, (5657), 1907 states have internal predecessors, (5657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:36:57,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1908 states to 1908 states and 5657 transitions. [2021-07-13 19:36:57,166 INFO L78 Accepts]: Start accepts. Automaton has 1908 states and 5657 transitions. Word has length 19 [2021-07-13 19:36:57,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:36:57,166 INFO L482 AbstractCegarLoop]: Abstraction has 1908 states and 5657 transitions. [2021-07-13 19:36:57,166 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:36:57,166 INFO L276 IsEmpty]: Start isEmpty. Operand 1908 states and 5657 transitions. [2021-07-13 19:36:57,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:36:57,169 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:36:57,169 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:36:57,376 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3644,418 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:36:57,377 INFO L430 AbstractCegarLoop]: === Iteration 428 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:36:57,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:36:57,377 INFO L82 PathProgramCache]: Analyzing trace with hash 1573693946, now seen corresponding path program 414 times [2021-07-13 19:36:57,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:36:57,377 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492532823] [2021-07-13 19:36:57,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:36:57,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:36:57,479 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:36:57,479 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:36:57,479 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492532823] [2021-07-13 19:36:57,479 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1492532823] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:36:57,479 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [737623967] [2021-07-13 19:36:57,479 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 419 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 419 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:36:57,509 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-13 19:36:57,510 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:36:57,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 19:36:57,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:36:57,640 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:36:57,640 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:36:57,640 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:36:57,641 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:36:57,643 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:36:57,644 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:36:57,644 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:36:57,667 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-07-13 19:36:57,667 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:36:57,668 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:36:57,668 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-07-13 19:36:57,689 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:36:57,690 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [737623967] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:36:57,690 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:36:57,690 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-07-13 19:36:57,690 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990621529] [2021-07-13 19:36:57,690 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 19:36:57,690 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:36:57,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 19:36:57,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=330, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:36:57,690 INFO L87 Difference]: Start difference. First operand 1908 states and 5657 transitions. Second operand has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:36:58,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:36:58,531 INFO L93 Difference]: Finished difference Result 2517 states and 6946 transitions. [2021-07-13 19:36:58,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-07-13 19:36:58,531 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:36:58,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:36:58,535 INFO L225 Difference]: With dead ends: 2517 [2021-07-13 19:36:58,535 INFO L226 Difference]: Without dead ends: 2517 [2021-07-13 19:36:58,535 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 486 ImplicationChecksByTransitivity, 499.1ms TimeCoverageRelationStatistics Valid=184, Invalid=1796, Unknown=0, NotChecked=0, Total=1980 [2021-07-13 19:36:58,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2517 states. [2021-07-13 19:36:58,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2517 to 1947. [2021-07-13 19:36:58,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1947 states, 1946 states have (on average 2.9676258992805757) internal successors, (5775), 1946 states have internal predecessors, (5775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:36:58,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1947 states to 1947 states and 5775 transitions. [2021-07-13 19:36:58,560 INFO L78 Accepts]: Start accepts. Automaton has 1947 states and 5775 transitions. Word has length 19 [2021-07-13 19:36:58,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:36:58,560 INFO L482 AbstractCegarLoop]: Abstraction has 1947 states and 5775 transitions. [2021-07-13 19:36:58,560 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:36:58,560 INFO L276 IsEmpty]: Start isEmpty. Operand 1947 states and 5775 transitions. [2021-07-13 19:36:58,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:36:58,563 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:36:58,563 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:36:58,763 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3651,419 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:36:58,763 INFO L430 AbstractCegarLoop]: === Iteration 429 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:36:58,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:36:58,763 INFO L82 PathProgramCache]: Analyzing trace with hash -850013410, now seen corresponding path program 415 times [2021-07-13 19:36:58,763 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:36:58,763 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716500652] [2021-07-13 19:36:58,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:36:58,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:36:58,871 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:36:58,871 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:36:58,871 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716500652] [2021-07-13 19:36:58,871 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [716500652] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:36:58,871 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [846799251] [2021-07-13 19:36:58,871 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 420 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 420 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:36:58,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:36:58,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 19:36:58,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:36:59,008 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:36:59,009 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:36:59,009 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:36:59,010 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:36:59,012 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:36:59,013 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:36:59,013 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:36:59,029 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:36:59,031 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:36:59,032 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:36:59,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:36:59,033 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:36:59,035 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:36:59,035 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:36:59,036 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:36:59,068 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-07-13 19:36:59,068 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:36:59,069 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:36:59,069 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-07-13 19:36:59,134 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:36:59,134 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [846799251] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:36:59,135 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:36:59,135 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-07-13 19:36:59,135 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35957630] [2021-07-13 19:36:59,135 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 19:36:59,135 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:36:59,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 19:36:59,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:36:59,135 INFO L87 Difference]: Start difference. First operand 1947 states and 5775 transitions. Second operand has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:36:59,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:36:59,766 INFO L93 Difference]: Finished difference Result 2360 states and 6719 transitions. [2021-07-13 19:36:59,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-07-13 19:36:59,767 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:36:59,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:36:59,770 INFO L225 Difference]: With dead ends: 2360 [2021-07-13 19:36:59,770 INFO L226 Difference]: Without dead ends: 2356 [2021-07-13 19:36:59,770 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 369 ImplicationChecksByTransitivity, 511.1ms TimeCoverageRelationStatistics Valid=146, Invalid=1414, Unknown=0, NotChecked=0, Total=1560 [2021-07-13 19:36:59,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2356 states. [2021-07-13 19:36:59,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2356 to 2033. [2021-07-13 19:36:59,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2033 states, 2032 states have (on average 2.979330708661417) internal successors, (6054), 2032 states have internal predecessors, (6054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:36:59,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2033 states to 2033 states and 6054 transitions. [2021-07-13 19:36:59,795 INFO L78 Accepts]: Start accepts. Automaton has 2033 states and 6054 transitions. Word has length 19 [2021-07-13 19:36:59,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:36:59,795 INFO L482 AbstractCegarLoop]: Abstraction has 2033 states and 6054 transitions. [2021-07-13 19:36:59,795 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:36:59,795 INFO L276 IsEmpty]: Start isEmpty. Operand 2033 states and 6054 transitions. [2021-07-13 19:36:59,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:36:59,797 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:36:59,797 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:36:59,998 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3654,420 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:36:59,998 INFO L430 AbstractCegarLoop]: === Iteration 430 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:36:59,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:36:59,998 INFO L82 PathProgramCache]: Analyzing trace with hash 879033924, now seen corresponding path program 416 times [2021-07-13 19:36:59,998 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:36:59,998 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558152218] [2021-07-13 19:36:59,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:37:00,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:37:00,113 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:37:00,113 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:37:00,113 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558152218] [2021-07-13 19:37:00,113 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [558152218] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:37:00,113 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1688839557] [2021-07-13 19:37:00,113 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 421 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 421 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:37:00,142 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:37:00,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:37:00,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 19:37:00,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:37:00,298 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:37:00,299 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:37:00,301 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:37:00,302 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:37:00,304 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:37:00,305 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:37:00,305 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:37:00,306 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:37:00,308 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:37:00,309 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:37:00,311 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:37:00,312 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:37:00,314 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:37:00,314 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:37:00,315 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:37:00,344 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-07-13 19:37:00,345 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:37:00,346 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:37:00,346 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-07-13 19:37:00,373 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:37:00,374 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1688839557] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:37:00,374 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:37:00,374 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-07-13 19:37:00,374 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85880154] [2021-07-13 19:37:00,374 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 19:37:00,374 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:37:00,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 19:37:00,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:37:00,374 INFO L87 Difference]: Start difference. First operand 2033 states and 6054 transitions. Second operand has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:37:01,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:37:01,048 INFO L93 Difference]: Finished difference Result 2349 states and 6703 transitions. [2021-07-13 19:37:01,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-07-13 19:37:01,048 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:37:01,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:37:01,051 INFO L225 Difference]: With dead ends: 2349 [2021-07-13 19:37:01,051 INFO L226 Difference]: Without dead ends: 2341 [2021-07-13 19:37:01,051 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 509.4ms TimeCoverageRelationStatistics Valid=149, Invalid=1333, Unknown=0, NotChecked=0, Total=1482 [2021-07-13 19:37:01,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2341 states. [2021-07-13 19:37:01,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2341 to 2045. [2021-07-13 19:37:01,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2045 states, 2044 states have (on average 2.9779843444227008) internal successors, (6087), 2044 states have internal predecessors, (6087), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:37:01,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2045 states to 2045 states and 6087 transitions. [2021-07-13 19:37:01,075 INFO L78 Accepts]: Start accepts. Automaton has 2045 states and 6087 transitions. Word has length 19 [2021-07-13 19:37:01,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:37:01,076 INFO L482 AbstractCegarLoop]: Abstraction has 2045 states and 6087 transitions. [2021-07-13 19:37:01,076 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:37:01,076 INFO L276 IsEmpty]: Start isEmpty. Operand 2045 states and 6087 transitions. [2021-07-13 19:37:01,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:37:01,078 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:37:01,078 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:37:01,278 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 421 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3660 [2021-07-13 19:37:01,279 INFO L430 AbstractCegarLoop]: === Iteration 431 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:37:01,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:37:01,279 INFO L82 PathProgramCache]: Analyzing trace with hash -1355073570, now seen corresponding path program 417 times [2021-07-13 19:37:01,279 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:37:01,279 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805442262] [2021-07-13 19:37:01,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:37:01,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:37:01,375 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:37:01,375 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:37:01,375 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805442262] [2021-07-13 19:37:01,375 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [805442262] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:37:01,375 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1746299898] [2021-07-13 19:37:01,375 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 422 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 422 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:37:01,404 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 19:37:01,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:37:01,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 19:37:01,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:37:01,569 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:37:01,570 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:37:01,572 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:37:01,573 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:37:01,576 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:37:01,576 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:37:01,576 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:37:01,577 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:37:01,579 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:37:01,580 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:37:01,582 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:37:01,583 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:37:01,585 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:37:01,585 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:37:01,586 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:37:01,615 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-07-13 19:37:01,615 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:37:01,616 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:37:01,616 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-07-13 19:37:01,644 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:37:01,644 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1746299898] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:37:01,644 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:37:01,644 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-07-13 19:37:01,644 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978893616] [2021-07-13 19:37:01,644 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 19:37:01,645 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:37:01,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 19:37:01,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:37:01,645 INFO L87 Difference]: Start difference. First operand 2045 states and 6087 transitions. Second operand has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:37:02,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:37:02,348 INFO L93 Difference]: Finished difference Result 2336 states and 6674 transitions. [2021-07-13 19:37:02,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-13 19:37:02,349 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:37:02,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:37:02,352 INFO L225 Difference]: With dead ends: 2336 [2021-07-13 19:37:02,352 INFO L226 Difference]: Without dead ends: 2324 [2021-07-13 19:37:02,352 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 316 ImplicationChecksByTransitivity, 532.0ms TimeCoverageRelationStatistics Valid=146, Invalid=1336, Unknown=0, NotChecked=0, Total=1482 [2021-07-13 19:37:02,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2324 states. [2021-07-13 19:37:02,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2324 to 2053. [2021-07-13 19:37:02,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2053 states, 2052 states have (on average 2.9683235867446394) internal successors, (6091), 2052 states have internal predecessors, (6091), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:37:02,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2053 states to 2053 states and 6091 transitions. [2021-07-13 19:37:02,380 INFO L78 Accepts]: Start accepts. Automaton has 2053 states and 6091 transitions. Word has length 19 [2021-07-13 19:37:02,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:37:02,380 INFO L482 AbstractCegarLoop]: Abstraction has 2053 states and 6091 transitions. [2021-07-13 19:37:02,380 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:37:02,380 INFO L276 IsEmpty]: Start isEmpty. Operand 2053 states and 6091 transitions. [2021-07-13 19:37:02,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:37:02,382 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:37:02,382 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:37:02,583 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3667,422 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:37:02,583 INFO L430 AbstractCegarLoop]: === Iteration 432 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:37:02,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:37:02,583 INFO L82 PathProgramCache]: Analyzing trace with hash 1157374330, now seen corresponding path program 418 times [2021-07-13 19:37:02,583 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:37:02,583 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348920183] [2021-07-13 19:37:02,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:37:02,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:37:02,682 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:37:02,682 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:37:02,682 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348920183] [2021-07-13 19:37:02,682 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1348920183] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:37:02,682 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2143200453] [2021-07-13 19:37:02,682 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 423 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 423 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:37:02,710 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:37:02,711 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:37:02,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 19:37:02,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:37:02,850 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:37:02,851 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:37:02,851 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:37:02,852 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:37:02,854 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:37:02,854 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:37:02,855 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:37:02,876 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-07-13 19:37:02,876 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:37:02,877 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:37:02,877 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-07-13 19:37:02,899 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:37:02,899 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2143200453] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:37:02,899 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:37:02,899 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-07-13 19:37:02,899 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67855713] [2021-07-13 19:37:02,899 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 19:37:02,899 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:37:02,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 19:37:02,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:37:02,900 INFO L87 Difference]: Start difference. First operand 2053 states and 6091 transitions. Second operand has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:37:03,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:37:03,801 INFO L93 Difference]: Finished difference Result 2605 states and 7193 transitions. [2021-07-13 19:37:03,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-07-13 19:37:03,802 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:37:03,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:37:03,805 INFO L225 Difference]: With dead ends: 2605 [2021-07-13 19:37:03,805 INFO L226 Difference]: Without dead ends: 2601 [2021-07-13 19:37:03,806 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 599 ImplicationChecksByTransitivity, 634.9ms TimeCoverageRelationStatistics Valid=225, Invalid=2127, Unknown=0, NotChecked=0, Total=2352 [2021-07-13 19:37:03,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2601 states. [2021-07-13 19:37:03,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2601 to 2058. [2021-07-13 19:37:03,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2058 states, 2057 states have (on average 2.9679144385026737) internal successors, (6105), 2057 states have internal predecessors, (6105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:37:03,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2058 states to 2058 states and 6105 transitions. [2021-07-13 19:37:03,833 INFO L78 Accepts]: Start accepts. Automaton has 2058 states and 6105 transitions. Word has length 19 [2021-07-13 19:37:03,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:37:03,833 INFO L482 AbstractCegarLoop]: Abstraction has 2058 states and 6105 transitions. [2021-07-13 19:37:03,833 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:37:03,833 INFO L276 IsEmpty]: Start isEmpty. Operand 2058 states and 6105 transitions. [2021-07-13 19:37:03,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:37:03,835 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:37:03,835 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:37:04,035 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3674,423 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:37:04,036 INFO L430 AbstractCegarLoop]: === Iteration 433 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:37:04,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:37:04,036 INFO L82 PathProgramCache]: Analyzing trace with hash -1944104998, now seen corresponding path program 419 times [2021-07-13 19:37:04,036 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:37:04,036 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564064620] [2021-07-13 19:37:04,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:37:04,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:37:04,147 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:37:04,147 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:37:04,147 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564064620] [2021-07-13 19:37:04,147 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1564064620] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:37:04,147 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [394472840] [2021-07-13 19:37:04,147 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 424 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 424 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:37:04,176 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:37:04,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:37:04,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 19:37:04,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:37:04,294 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:37:04,294 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:37:04,294 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:37:04,295 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:37:04,297 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:37:04,298 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:37:04,298 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:37:04,299 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:37:04,301 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:37:04,301 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:37:04,301 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:37:04,302 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:37:04,304 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:37:04,304 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:37:04,305 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:37:04,337 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-07-13 19:37:04,337 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:37:04,338 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:37:04,338 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-07-13 19:37:04,402 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:37:04,402 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [394472840] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:37:04,402 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:37:04,403 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-07-13 19:37:04,403 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805539387] [2021-07-13 19:37:04,403 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 19:37:04,403 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:37:04,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 19:37:04,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=330, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:37:04,403 INFO L87 Difference]: Start difference. First operand 2058 states and 6105 transitions. Second operand has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:37:05,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:37:05,036 INFO L93 Difference]: Finished difference Result 2431 states and 6944 transitions. [2021-07-13 19:37:05,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-13 19:37:05,036 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:37:05,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:37:05,040 INFO L225 Difference]: With dead ends: 2431 [2021-07-13 19:37:05,040 INFO L226 Difference]: Without dead ends: 2427 [2021-07-13 19:37:05,040 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 288 ImplicationChecksByTransitivity, 521.7ms TimeCoverageRelationStatistics Valid=139, Invalid=1193, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 19:37:05,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2427 states. [2021-07-13 19:37:05,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2427 to 2116. [2021-07-13 19:37:05,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2116 states, 2115 states have (on average 2.9749408983451535) internal successors, (6292), 2115 states have internal predecessors, (6292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:37:05,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2116 states to 2116 states and 6292 transitions. [2021-07-13 19:37:05,065 INFO L78 Accepts]: Start accepts. Automaton has 2116 states and 6292 transitions. Word has length 19 [2021-07-13 19:37:05,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:37:05,065 INFO L482 AbstractCegarLoop]: Abstraction has 2116 states and 6292 transitions. [2021-07-13 19:37:05,065 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:37:05,065 INFO L276 IsEmpty]: Start isEmpty. Operand 2116 states and 6292 transitions. [2021-07-13 19:37:05,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:37:05,068 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:37:05,068 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:37:05,268 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3677,424 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:37:05,268 INFO L430 AbstractCegarLoop]: === Iteration 434 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:37:05,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:37:05,268 INFO L82 PathProgramCache]: Analyzing trace with hash -215057664, now seen corresponding path program 420 times [2021-07-13 19:37:05,268 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:37:05,268 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119744148] [2021-07-13 19:37:05,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:37:05,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:37:05,373 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:37:05,374 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:37:05,374 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119744148] [2021-07-13 19:37:05,374 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [119744148] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:37:05,374 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1929865646] [2021-07-13 19:37:05,374 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 425 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 425 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:37:05,403 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:37:05,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:37:05,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 19:37:05,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:37:05,569 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:37:05,570 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:37:05,572 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:37:05,573 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:37:05,575 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:37:05,576 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:37:05,576 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:37:05,577 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:37:05,590 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:37:05,591 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:37:05,594 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:37:05,595 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:37:05,597 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:37:05,597 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:37:05,598 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:37:05,627 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-07-13 19:37:05,627 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:37:05,628 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:37:05,628 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-07-13 19:37:05,656 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:37:05,656 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1929865646] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:37:05,656 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:37:05,656 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-07-13 19:37:05,657 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635564987] [2021-07-13 19:37:05,657 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 19:37:05,657 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:37:05,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 19:37:05,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=330, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:37:05,657 INFO L87 Difference]: Start difference. First operand 2116 states and 6292 transitions. Second operand has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:37:06,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:37:06,195 INFO L93 Difference]: Finished difference Result 2391 states and 6848 transitions. [2021-07-13 19:37:06,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-13 19:37:06,195 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:37:06,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:37:06,199 INFO L225 Difference]: With dead ends: 2391 [2021-07-13 19:37:06,199 INFO L226 Difference]: Without dead ends: 2383 [2021-07-13 19:37:06,199 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 459.1ms TimeCoverageRelationStatistics Valid=118, Invalid=1004, Unknown=0, NotChecked=0, Total=1122 [2021-07-13 19:37:06,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2383 states. [2021-07-13 19:37:06,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2383 to 2116. [2021-07-13 19:37:06,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2116 states, 2115 states have (on average 2.9735224586288416) internal successors, (6289), 2115 states have internal predecessors, (6289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:37:06,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2116 states to 2116 states and 6289 transitions. [2021-07-13 19:37:06,224 INFO L78 Accepts]: Start accepts. Automaton has 2116 states and 6289 transitions. Word has length 19 [2021-07-13 19:37:06,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:37:06,224 INFO L482 AbstractCegarLoop]: Abstraction has 2116 states and 6289 transitions. [2021-07-13 19:37:06,225 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:37:06,225 INFO L276 IsEmpty]: Start isEmpty. Operand 2116 states and 6289 transitions. [2021-07-13 19:37:06,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:37:06,227 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:37:06,227 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:37:06,427 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 425 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3683 [2021-07-13 19:37:06,427 INFO L430 AbstractCegarLoop]: === Iteration 435 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:37:06,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:37:06,428 INFO L82 PathProgramCache]: Analyzing trace with hash 1845802138, now seen corresponding path program 421 times [2021-07-13 19:37:06,428 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:37:06,428 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515221984] [2021-07-13 19:37:06,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:37:06,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:37:06,532 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:37:06,532 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:37:06,532 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515221984] [2021-07-13 19:37:06,532 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1515221984] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:37:06,532 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [41937429] [2021-07-13 19:37:06,532 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 426 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 426 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:37:06,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:37:06,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 19:37:06,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:37:06,733 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:37:06,734 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:37:06,737 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:37:06,737 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:37:06,740 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:37:06,740 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:37:06,740 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:37:06,741 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:37:06,743 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:37:06,744 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:37:06,746 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:37:06,747 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:37:06,749 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:37:06,749 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:37:06,750 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:37:06,779 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-07-13 19:37:06,779 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:37:06,780 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:37:06,780 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-07-13 19:37:06,809 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:37:06,809 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [41937429] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:37:06,809 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:37:06,809 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-07-13 19:37:06,809 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193293788] [2021-07-13 19:37:06,809 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 19:37:06,809 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:37:06,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 19:37:06,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=332, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:37:06,810 INFO L87 Difference]: Start difference. First operand 2116 states and 6289 transitions. Second operand has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:37:07,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:37:07,296 INFO L93 Difference]: Finished difference Result 2342 states and 6772 transitions. [2021-07-13 19:37:07,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-13 19:37:07,297 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:37:07,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:37:07,301 INFO L225 Difference]: With dead ends: 2342 [2021-07-13 19:37:07,301 INFO L226 Difference]: Without dead ends: 2330 [2021-07-13 19:37:07,301 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 445.8ms TimeCoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2021-07-13 19:37:07,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2330 states. [2021-07-13 19:37:07,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2330 to 2116. [2021-07-13 19:37:07,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2116 states, 2115 states have (on average 2.9706855791962177) internal successors, (6283), 2115 states have internal predecessors, (6283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:37:07,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2116 states to 2116 states and 6283 transitions. [2021-07-13 19:37:07,331 INFO L78 Accepts]: Start accepts. Automaton has 2116 states and 6283 transitions. Word has length 19 [2021-07-13 19:37:07,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:37:07,331 INFO L482 AbstractCegarLoop]: Abstraction has 2116 states and 6283 transitions. [2021-07-13 19:37:07,331 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:37:07,331 INFO L276 IsEmpty]: Start isEmpty. Operand 2116 states and 6283 transitions. [2021-07-13 19:37:07,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:37:07,333 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:37:07,333 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:37:07,534 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3690,426 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:37:07,534 INFO L430 AbstractCegarLoop]: === Iteration 436 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:37:07,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:37:07,534 INFO L82 PathProgramCache]: Analyzing trace with hash 1307946560, now seen corresponding path program 422 times [2021-07-13 19:37:07,534 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:37:07,534 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688865114] [2021-07-13 19:37:07,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:37:07,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:37:07,641 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:37:07,641 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:37:07,642 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688865114] [2021-07-13 19:37:07,642 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [688865114] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:37:07,642 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [375618481] [2021-07-13 19:37:07,642 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 427 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 427 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:37:07,670 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:37:07,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:37:07,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 19:37:07,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:37:07,849 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:37:07,850 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:37:07,852 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:37:07,853 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:37:07,855 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:37:07,856 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:37:07,856 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:37:07,856 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:37:07,859 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:37:07,860 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:37:07,862 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:37:07,863 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:37:07,865 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:37:07,865 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:37:07,866 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:37:07,896 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-07-13 19:37:07,896 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:37:07,897 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:37:07,897 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-07-13 19:37:07,926 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:37:07,926 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [375618481] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:37:07,926 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:37:07,926 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-07-13 19:37:07,926 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241981585] [2021-07-13 19:37:07,926 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 19:37:07,926 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:37:07,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 19:37:07,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=333, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:37:07,927 INFO L87 Difference]: Start difference. First operand 2116 states and 6283 transitions. Second operand has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:37:08,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:37:08,391 INFO L93 Difference]: Finished difference Result 2338 states and 6760 transitions. [2021-07-13 19:37:08,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-13 19:37:08,391 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:37:08,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:37:08,395 INFO L225 Difference]: With dead ends: 2338 [2021-07-13 19:37:08,395 INFO L226 Difference]: Without dead ends: 2322 [2021-07-13 19:37:08,395 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 473.5ms TimeCoverageRelationStatistics Valid=104, Invalid=826, Unknown=0, NotChecked=0, Total=930 [2021-07-13 19:37:08,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2322 states. [2021-07-13 19:37:08,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2322 to 2118. [2021-07-13 19:37:08,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2118 states, 2117 states have (on average 2.966461974492206) internal successors, (6280), 2117 states have internal predecessors, (6280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:37:08,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2118 states to 2118 states and 6280 transitions. [2021-07-13 19:37:08,420 INFO L78 Accepts]: Start accepts. Automaton has 2118 states and 6280 transitions. Word has length 19 [2021-07-13 19:37:08,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:37:08,420 INFO L482 AbstractCegarLoop]: Abstraction has 2118 states and 6280 transitions. [2021-07-13 19:37:08,421 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:37:08,421 INFO L276 IsEmpty]: Start isEmpty. Operand 2118 states and 6280 transitions. [2021-07-13 19:37:08,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:37:08,423 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:37:08,423 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:37:08,623 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3697,427 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:37:08,624 INFO L430 AbstractCegarLoop]: === Iteration 437 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:37:08,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:37:08,624 INFO L82 PathProgramCache]: Analyzing trace with hash 1136368122, now seen corresponding path program 423 times [2021-07-13 19:37:08,624 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:37:08,624 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969039601] [2021-07-13 19:37:08,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:37:08,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:37:08,723 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:37:08,723 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:37:08,723 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969039601] [2021-07-13 19:37:08,723 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [969039601] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:37:08,723 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [461245] [2021-07-13 19:37:08,724 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 428 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 428 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:37:08,752 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 19:37:08,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:37:08,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 19:37:08,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:37:08,895 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:37:08,896 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:37:08,896 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:37:08,897 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:37:08,899 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:37:08,899 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:37:08,900 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:37:08,922 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-07-13 19:37:08,922 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:37:08,923 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:37:08,923 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-07-13 19:37:08,945 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:37:08,945 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [461245] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:37:08,945 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:37:08,945 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-07-13 19:37:08,945 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578872822] [2021-07-13 19:37:08,946 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 19:37:08,946 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:37:08,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 19:37:08,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=332, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:37:08,946 INFO L87 Difference]: Start difference. First operand 2118 states and 6280 transitions. Second operand has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:37:09,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:37:09,315 INFO L93 Difference]: Finished difference Result 2384 states and 6857 transitions. [2021-07-13 19:37:09,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 19:37:09,315 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:37:09,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:37:09,318 INFO L225 Difference]: With dead ends: 2384 [2021-07-13 19:37:09,318 INFO L226 Difference]: Without dead ends: 2384 [2021-07-13 19:37:09,318 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 235.5ms TimeCoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:37:09,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2384 states. [2021-07-13 19:37:09,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2384 to 2112. [2021-07-13 19:37:09,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2112 states, 2111 states have (on average 2.968261487446708) internal successors, (6266), 2111 states have internal predecessors, (6266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:37:09,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2112 states to 2112 states and 6266 transitions. [2021-07-13 19:37:09,351 INFO L78 Accepts]: Start accepts. Automaton has 2112 states and 6266 transitions. Word has length 19 [2021-07-13 19:37:09,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:37:09,351 INFO L482 AbstractCegarLoop]: Abstraction has 2112 states and 6266 transitions. [2021-07-13 19:37:09,351 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:37:09,351 INFO L276 IsEmpty]: Start isEmpty. Operand 2112 states and 6266 transitions. [2021-07-13 19:37:09,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:37:09,353 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:37:09,353 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:37:09,554 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3704,428 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:37:09,554 INFO L430 AbstractCegarLoop]: === Iteration 438 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:37:09,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:37:09,554 INFO L82 PathProgramCache]: Analyzing trace with hash 1186240252, now seen corresponding path program 424 times [2021-07-13 19:37:09,554 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:37:09,554 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477866893] [2021-07-13 19:37:09,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:37:09,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:37:09,673 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:37:09,673 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:37:09,673 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477866893] [2021-07-13 19:37:09,673 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [477866893] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:37:09,673 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1872728054] [2021-07-13 19:37:09,673 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 429 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 429 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:37:09,715 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:37:09,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:37:09,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 19:37:09,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:37:09,857 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:37:09,857 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:37:09,857 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:37:09,858 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:37:09,860 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:37:09,861 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:37:09,861 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:37:09,862 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:37:09,864 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:37:09,864 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:37:09,864 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:37:09,865 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:37:09,867 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:37:09,867 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:37:09,868 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:37:09,900 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-07-13 19:37:09,900 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:37:09,901 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:37:09,901 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-07-13 19:37:09,955 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:37:09,955 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1872728054] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:37:09,955 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:37:09,955 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-07-13 19:37:09,955 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693351643] [2021-07-13 19:37:09,955 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 19:37:09,955 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:37:09,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 19:37:09,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=333, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:37:09,956 INFO L87 Difference]: Start difference. First operand 2112 states and 6266 transitions. Second operand has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:37:10,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:37:10,294 INFO L93 Difference]: Finished difference Result 2407 states and 6882 transitions. [2021-07-13 19:37:10,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:37:10,294 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:37:10,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:37:10,298 INFO L225 Difference]: With dead ends: 2407 [2021-07-13 19:37:10,298 INFO L226 Difference]: Without dead ends: 2407 [2021-07-13 19:37:10,298 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 309.3ms TimeCoverageRelationStatistics Valid=57, Invalid=405, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:37:10,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2407 states. [2021-07-13 19:37:10,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2407 to 2123. [2021-07-13 19:37:10,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2123 states, 2122 states have (on average 2.9717247879359094) internal successors, (6306), 2122 states have internal predecessors, (6306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:37:10,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2123 states to 2123 states and 6306 transitions. [2021-07-13 19:37:10,325 INFO L78 Accepts]: Start accepts. Automaton has 2123 states and 6306 transitions. Word has length 19 [2021-07-13 19:37:10,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:37:10,325 INFO L482 AbstractCegarLoop]: Abstraction has 2123 states and 6306 transitions. [2021-07-13 19:37:10,325 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:37:10,325 INFO L276 IsEmpty]: Start isEmpty. Operand 2123 states and 6306 transitions. [2021-07-13 19:37:10,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:37:10,327 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:37:10,327 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:37:10,527 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 429 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3707 [2021-07-13 19:37:10,528 INFO L430 AbstractCegarLoop]: === Iteration 439 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:37:10,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:37:10,528 INFO L82 PathProgramCache]: Analyzing trace with hash 1987856480, now seen corresponding path program 425 times [2021-07-13 19:37:10,528 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:37:10,528 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704241958] [2021-07-13 19:37:10,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:37:10,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:37:10,646 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:37:10,647 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:37:10,647 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704241958] [2021-07-13 19:37:10,647 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [704241958] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:37:10,647 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [753765247] [2021-07-13 19:37:10,647 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 430 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 430 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:37:10,689 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-13 19:37:10,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:37:10,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 19:37:10,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:37:10,821 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:37:10,822 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:37:10,822 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:37:10,823 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:37:10,825 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:37:10,826 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:37:10,826 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:37:10,826 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:37:10,829 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:37:10,829 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:37:10,829 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:37:10,830 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:37:10,832 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:37:10,832 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:37:10,833 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:37:10,866 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-07-13 19:37:10,866 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:37:10,866 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:37:10,866 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-07-13 19:37:10,939 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:37:10,939 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [753765247] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:37:10,939 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:37:10,939 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-07-13 19:37:10,940 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421833633] [2021-07-13 19:37:10,940 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 19:37:10,940 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:37:10,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 19:37:10,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=333, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:37:10,940 INFO L87 Difference]: Start difference. First operand 2123 states and 6306 transitions. Second operand has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:37:11,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:37:11,956 INFO L93 Difference]: Finished difference Result 2434 states and 6929 transitions. [2021-07-13 19:37:11,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-07-13 19:37:11,957 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:37:11,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:37:11,960 INFO L225 Difference]: With dead ends: 2434 [2021-07-13 19:37:11,960 INFO L226 Difference]: Without dead ends: 2422 [2021-07-13 19:37:11,960 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 432 ImplicationChecksByTransitivity, 879.4ms TimeCoverageRelationStatistics Valid=188, Invalid=1704, Unknown=0, NotChecked=0, Total=1892 [2021-07-13 19:37:11,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2422 states. [2021-07-13 19:37:11,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2422 to 2130. [2021-07-13 19:37:11,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2130 states, 2129 states have (on average 2.971817754814467) internal successors, (6327), 2129 states have internal predecessors, (6327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:37:11,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2130 states to 2130 states and 6327 transitions. [2021-07-13 19:37:11,986 INFO L78 Accepts]: Start accepts. Automaton has 2130 states and 6327 transitions. Word has length 19 [2021-07-13 19:37:11,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:37:11,986 INFO L482 AbstractCegarLoop]: Abstraction has 2130 states and 6327 transitions. [2021-07-13 19:37:11,986 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:37:11,986 INFO L276 IsEmpty]: Start isEmpty. Operand 2130 states and 6327 transitions. [2021-07-13 19:37:11,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:37:11,988 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:37:11,989 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:37:12,189 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3711,430 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:37:12,189 INFO L430 AbstractCegarLoop]: === Iteration 440 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:37:12,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:37:12,189 INFO L82 PathProgramCache]: Analyzing trace with hash -588767110, now seen corresponding path program 426 times [2021-07-13 19:37:12,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:37:12,189 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761980918] [2021-07-13 19:37:12,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:37:12,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:37:12,311 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:37:12,311 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:37:12,311 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761980918] [2021-07-13 19:37:12,311 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1761980918] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:37:12,311 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1773229047] [2021-07-13 19:37:12,311 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 431 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 431 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:37:12,341 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-13 19:37:12,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:37:12,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 19:37:12,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:37:12,472 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:37:12,480 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:37:12,480 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:37:12,482 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:37:12,484 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:37:12,485 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:37:12,485 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:37:12,486 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:37:12,489 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:37:12,489 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:37:12,489 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:37:12,490 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:37:12,493 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:37:12,493 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:37:12,494 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:37:12,534 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-07-13 19:37:12,534 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:37:12,535 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:37:12,535 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-07-13 19:37:12,596 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:37:12,597 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1773229047] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:37:12,597 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:37:12,597 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-07-13 19:37:12,597 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12299142] [2021-07-13 19:37:12,597 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 19:37:12,597 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:37:12,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 19:37:12,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=333, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:37:12,597 INFO L87 Difference]: Start difference. First operand 2130 states and 6327 transitions. Second operand has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:37:13,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:37:13,268 INFO L93 Difference]: Finished difference Result 2403 states and 6885 transitions. [2021-07-13 19:37:13,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-13 19:37:13,268 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:37:13,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:37:13,271 INFO L225 Difference]: With dead ends: 2403 [2021-07-13 19:37:13,272 INFO L226 Difference]: Without dead ends: 2403 [2021-07-13 19:37:13,272 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 577.3ms TimeCoverageRelationStatistics Valid=135, Invalid=987, Unknown=0, NotChecked=0, Total=1122 [2021-07-13 19:37:13,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2403 states. [2021-07-13 19:37:13,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2403 to 2116. [2021-07-13 19:37:13,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2116 states, 2115 states have (on average 2.9673758865248225) internal successors, (6276), 2115 states have internal predecessors, (6276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:37:13,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2116 states to 2116 states and 6276 transitions. [2021-07-13 19:37:13,297 INFO L78 Accepts]: Start accepts. Automaton has 2116 states and 6276 transitions. Word has length 19 [2021-07-13 19:37:13,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:37:13,297 INFO L482 AbstractCegarLoop]: Abstraction has 2116 states and 6276 transitions. [2021-07-13 19:37:13,297 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:37:13,297 INFO L276 IsEmpty]: Start isEmpty. Operand 2116 states and 6276 transitions. [2021-07-13 19:37:13,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:37:13,299 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:37:13,299 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:37:13,499 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 431 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3716 [2021-07-13 19:37:13,500 INFO L430 AbstractCegarLoop]: === Iteration 441 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:37:13,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:37:13,500 INFO L82 PathProgramCache]: Analyzing trace with hash 1995586878, now seen corresponding path program 427 times [2021-07-13 19:37:13,500 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:37:13,500 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147943284] [2021-07-13 19:37:13,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:37:13,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:37:13,626 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:37:13,626 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:37:13,626 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147943284] [2021-07-13 19:37:13,626 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1147943284] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:37:13,626 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [419273033] [2021-07-13 19:37:13,626 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 432 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 432 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:37:13,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:37:13,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 19:37:13,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:37:13,825 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:37:13,826 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:37:13,826 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:37:13,827 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:37:13,829 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:37:13,829 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:37:13,830 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:37:13,852 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-07-13 19:37:13,853 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:37:13,853 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:37:13,853 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-07-13 19:37:13,884 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:37:13,884 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [419273033] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:37:13,884 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:37:13,884 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-07-13 19:37:13,885 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933071440] [2021-07-13 19:37:13,885 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 19:37:13,885 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:37:13,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 19:37:13,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=333, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:37:13,885 INFO L87 Difference]: Start difference. First operand 2116 states and 6276 transitions. Second operand has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:37:14,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:37:14,691 INFO L93 Difference]: Finished difference Result 2466 states and 7001 transitions. [2021-07-13 19:37:14,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-07-13 19:37:14,691 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:37:14,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:37:14,695 INFO L225 Difference]: With dead ends: 2466 [2021-07-13 19:37:14,695 INFO L226 Difference]: Without dead ends: 2466 [2021-07-13 19:37:14,695 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 692.4ms TimeCoverageRelationStatistics Valid=193, Invalid=1529, Unknown=0, NotChecked=0, Total=1722 [2021-07-13 19:37:14,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2466 states. [2021-07-13 19:37:14,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2466 to 2117. [2021-07-13 19:37:14,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2117 states, 2116 states have (on average 2.967391304347826) internal successors, (6279), 2116 states have internal predecessors, (6279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:37:14,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2117 states to 2117 states and 6279 transitions. [2021-07-13 19:37:14,720 INFO L78 Accepts]: Start accepts. Automaton has 2117 states and 6279 transitions. Word has length 19 [2021-07-13 19:37:14,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:37:14,721 INFO L482 AbstractCegarLoop]: Abstraction has 2117 states and 6279 transitions. [2021-07-13 19:37:14,721 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:37:14,721 INFO L276 IsEmpty]: Start isEmpty. Operand 2117 states and 6279 transitions. [2021-07-13 19:37:14,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:37:14,723 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:37:14,723 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:37:14,923 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3720,432 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:37:14,923 INFO L430 AbstractCegarLoop]: === Iteration 442 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:37:14,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:37:14,924 INFO L82 PathProgramCache]: Analyzing trace with hash 506181882, now seen corresponding path program 428 times [2021-07-13 19:37:14,924 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:37:14,924 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051043171] [2021-07-13 19:37:14,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:37:14,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:37:15,028 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:37:15,028 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:37:15,028 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051043171] [2021-07-13 19:37:15,028 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1051043171] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:37:15,028 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2073503936] [2021-07-13 19:37:15,028 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 433 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 433 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:37:15,057 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:37:15,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:37:15,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 19:37:15,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:37:15,215 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:37:15,216 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:37:15,216 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:37:15,217 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:37:15,219 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:37:15,219 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:37:15,220 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:37:15,242 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-07-13 19:37:15,242 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:37:15,243 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:37:15,243 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-07-13 19:37:15,265 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:37:15,265 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2073503936] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:37:15,265 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:37:15,265 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-07-13 19:37:15,265 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642744877] [2021-07-13 19:37:15,265 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 19:37:15,265 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:37:15,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 19:37:15,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=333, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:37:15,266 INFO L87 Difference]: Start difference. First operand 2117 states and 6279 transitions. Second operand has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:37:16,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:37:16,658 INFO L93 Difference]: Finished difference Result 2572 states and 7203 transitions. [2021-07-13 19:37:16,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-07-13 19:37:16,659 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:37:16,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:37:16,662 INFO L225 Difference]: With dead ends: 2572 [2021-07-13 19:37:16,662 INFO L226 Difference]: Without dead ends: 2572 [2021-07-13 19:37:16,662 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1089 ImplicationChecksByTransitivity, 1235.6ms TimeCoverageRelationStatistics Valid=411, Invalid=3371, Unknown=0, NotChecked=0, Total=3782 [2021-07-13 19:37:16,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2572 states. [2021-07-13 19:37:16,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2572 to 2113. [2021-07-13 19:37:16,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2113 states, 2112 states have (on average 2.968276515151515) internal successors, (6269), 2112 states have internal predecessors, (6269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:37:16,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2113 states to 2113 states and 6269 transitions. [2021-07-13 19:37:16,688 INFO L78 Accepts]: Start accepts. Automaton has 2113 states and 6269 transitions. Word has length 19 [2021-07-13 19:37:16,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:37:16,688 INFO L482 AbstractCegarLoop]: Abstraction has 2113 states and 6269 transitions. [2021-07-13 19:37:16,688 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:37:16,688 INFO L276 IsEmpty]: Start isEmpty. Operand 2113 states and 6269 transitions. [2021-07-13 19:37:16,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:37:16,691 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:37:16,691 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:37:16,891 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3723,433 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:37:16,891 INFO L430 AbstractCegarLoop]: === Iteration 443 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:37:16,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:37:16,892 INFO L82 PathProgramCache]: Analyzing trace with hash 1579267262, now seen corresponding path program 429 times [2021-07-13 19:37:16,892 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:37:16,892 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729930329] [2021-07-13 19:37:16,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:37:16,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:37:16,994 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:37:16,994 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:37:16,994 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729930329] [2021-07-13 19:37:16,994 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [729930329] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:37:16,994 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1204923513] [2021-07-13 19:37:16,994 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 434 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 434 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:37:17,023 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 19:37:17,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:37:17,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 19:37:17,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:37:17,175 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:37:17,175 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:37:17,176 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:37:17,176 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:37:17,179 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:37:17,179 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:37:17,179 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:37:17,201 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-07-13 19:37:17,202 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:37:17,202 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:37:17,202 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-07-13 19:37:17,225 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:37:17,225 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1204923513] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:37:17,226 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:37:17,226 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-07-13 19:37:17,226 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113412059] [2021-07-13 19:37:17,226 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 19:37:17,226 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:37:17,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 19:37:17,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=333, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:37:17,226 INFO L87 Difference]: Start difference. First operand 2113 states and 6269 transitions. Second operand has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:37:18,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:37:18,046 INFO L93 Difference]: Finished difference Result 2426 states and 6972 transitions. [2021-07-13 19:37:18,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-13 19:37:18,046 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:37:18,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:37:18,049 INFO L225 Difference]: With dead ends: 2426 [2021-07-13 19:37:18,049 INFO L226 Difference]: Without dead ends: 2426 [2021-07-13 19:37:18,049 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 703.3ms TimeCoverageRelationStatistics Valid=191, Invalid=1215, Unknown=0, NotChecked=0, Total=1406 [2021-07-13 19:37:18,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2426 states. [2021-07-13 19:37:18,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2426 to 2115. [2021-07-13 19:37:18,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2115 states, 2114 states have (on average 2.968306527909177) internal successors, (6275), 2114 states have internal predecessors, (6275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:37:18,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2115 states to 2115 states and 6275 transitions. [2021-07-13 19:37:18,075 INFO L78 Accepts]: Start accepts. Automaton has 2115 states and 6275 transitions. Word has length 19 [2021-07-13 19:37:18,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:37:18,075 INFO L482 AbstractCegarLoop]: Abstraction has 2115 states and 6275 transitions. [2021-07-13 19:37:18,075 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:37:18,075 INFO L276 IsEmpty]: Start isEmpty. Operand 2115 states and 6275 transitions. [2021-07-13 19:37:18,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:37:18,077 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:37:18,077 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:37:18,278 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3726,434 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:37:18,278 INFO L430 AbstractCegarLoop]: === Iteration 444 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:37:18,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:37:18,278 INFO L82 PathProgramCache]: Analyzing trace with hash 485175674, now seen corresponding path program 430 times [2021-07-13 19:37:18,278 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:37:18,278 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644073517] [2021-07-13 19:37:18,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:37:18,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:37:18,397 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:37:18,398 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:37:18,398 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644073517] [2021-07-13 19:37:18,398 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644073517] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:37:18,398 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1498938330] [2021-07-13 19:37:18,398 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 435 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 435 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:37:18,427 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:37:18,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:37:18,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 19:37:18,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:37:18,602 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:37:18,603 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:37:18,603 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:37:18,604 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:37:18,606 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:37:18,607 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:37:18,607 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:37:18,629 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-07-13 19:37:18,630 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:37:18,630 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:37:18,630 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-07-13 19:37:18,653 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:37:18,653 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1498938330] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:37:18,653 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:37:18,654 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-07-13 19:37:18,654 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122377534] [2021-07-13 19:37:18,654 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 19:37:18,654 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:37:18,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 19:37:18,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=335, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:37:18,654 INFO L87 Difference]: Start difference. First operand 2115 states and 6275 transitions. Second operand has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:37:18,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:37:18,908 INFO L93 Difference]: Finished difference Result 2351 states and 6795 transitions. [2021-07-13 19:37:18,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 19:37:18,908 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:37:18,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:37:18,911 INFO L225 Difference]: With dead ends: 2351 [2021-07-13 19:37:18,911 INFO L226 Difference]: Without dead ends: 2351 [2021-07-13 19:37:18,911 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 254.2ms TimeCoverageRelationStatistics Valid=45, Invalid=335, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:37:18,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2351 states. [2021-07-13 19:37:18,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2351 to 2117. [2021-07-13 19:37:18,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2117 states, 2116 states have (on average 2.9683364839319473) internal successors, (6281), 2116 states have internal predecessors, (6281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:37:18,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2117 states to 2117 states and 6281 transitions. [2021-07-13 19:37:18,937 INFO L78 Accepts]: Start accepts. Automaton has 2117 states and 6281 transitions. Word has length 19 [2021-07-13 19:37:18,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:37:18,937 INFO L482 AbstractCegarLoop]: Abstraction has 2117 states and 6281 transitions. [2021-07-13 19:37:18,937 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:37:18,937 INFO L276 IsEmpty]: Start isEmpty. Operand 2117 states and 6281 transitions. [2021-07-13 19:37:18,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:37:18,950 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:37:18,950 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:37:19,150 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 435 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3729 [2021-07-13 19:37:19,150 INFO L430 AbstractCegarLoop]: === Iteration 445 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:37:19,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:37:19,150 INFO L82 PathProgramCache]: Analyzing trace with hash 527359578, now seen corresponding path program 431 times [2021-07-13 19:37:19,151 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:37:19,151 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535139258] [2021-07-13 19:37:19,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:37:19,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:37:19,250 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:37:19,250 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:37:19,250 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535139258] [2021-07-13 19:37:19,251 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [535139258] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:37:19,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1844327659] [2021-07-13 19:37:19,251 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 436 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 436 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:37:19,281 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-13 19:37:19,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:37:19,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 19:37:19,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:37:19,421 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:37:19,422 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:37:19,422 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:37:19,423 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:37:19,425 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:37:19,425 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:37:19,426 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:37:19,443 INFO L628 ElimStorePlain]: treesize reduction 30, result has 33.3 percent of original size [2021-07-13 19:37:19,443 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:37:19,443 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:37:19,443 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:59, output treesize:15 [2021-07-13 19:37:19,467 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:37:19,467 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1844327659] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:37:19,467 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:37:19,467 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-07-13 19:37:19,467 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191642751] [2021-07-13 19:37:19,467 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:37:19,467 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:37:19,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:37:19,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=367, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:37:19,468 INFO L87 Difference]: Start difference. First operand 2117 states and 6281 transitions. Second operand has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:37:20,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:37:20,043 INFO L93 Difference]: Finished difference Result 2538 states and 7280 transitions. [2021-07-13 19:37:20,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-13 19:37:20,044 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:37:20,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:37:20,047 INFO L225 Difference]: With dead ends: 2538 [2021-07-13 19:37:20,047 INFO L226 Difference]: Without dead ends: 2538 [2021-07-13 19:37:20,047 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 347.3ms TimeCoverageRelationStatistics Valid=101, Invalid=955, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 19:37:20,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2538 states. [2021-07-13 19:37:20,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2538 to 2253. [2021-07-13 19:37:20,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2253 states, 2252 states have (on average 2.9871225577264653) internal successors, (6727), 2252 states have internal predecessors, (6727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:37:20,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2253 states to 2253 states and 6727 transitions. [2021-07-13 19:37:20,077 INFO L78 Accepts]: Start accepts. Automaton has 2253 states and 6727 transitions. Word has length 19 [2021-07-13 19:37:20,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:37:20,077 INFO L482 AbstractCegarLoop]: Abstraction has 2253 states and 6727 transitions. [2021-07-13 19:37:20,077 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:37:20,077 INFO L276 IsEmpty]: Start isEmpty. Operand 2253 states and 6727 transitions. [2021-07-13 19:37:20,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:37:20,080 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:37:20,080 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:37:20,280 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3732,436 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:37:20,280 INFO L430 AbstractCegarLoop]: === Iteration 446 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:37:20,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:37:20,280 INFO L82 PathProgramCache]: Analyzing trace with hash 2081408702, now seen corresponding path program 432 times [2021-07-13 19:37:20,280 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:37:20,281 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026912088] [2021-07-13 19:37:20,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:37:20,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:37:20,416 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:37:20,416 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:37:20,416 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026912088] [2021-07-13 19:37:20,417 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2026912088] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:37:20,417 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [761779482] [2021-07-13 19:37:20,417 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 437 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 437 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:37:20,454 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-13 19:37:20,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:37:20,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 19:37:20,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:37:20,608 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:37:20,608 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:37:20,609 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:37:20,609 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:37:20,612 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:37:20,612 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:37:20,612 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:37:20,613 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:37:20,615 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:37:20,615 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:37:20,617 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:37:20,618 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:37:20,620 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:37:20,621 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:37:20,622 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:37:20,623 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:37:20,650 INFO L628 ElimStorePlain]: treesize reduction 21, result has 58.0 percent of original size [2021-07-13 19:37:20,650 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:37:20,651 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:37:20,651 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 2 variables, input treesize:125, output treesize:29 [2021-07-13 19:37:20,684 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:37:20,684 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [761779482] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:37:20,684 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:37:20,684 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-07-13 19:37:20,684 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123929483] [2021-07-13 19:37:20,684 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:37:20,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:37:20,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:37:20,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=367, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:37:20,685 INFO L87 Difference]: Start difference. First operand 2253 states and 6727 transitions. Second operand has 21 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:37:21,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:37:21,290 INFO L93 Difference]: Finished difference Result 2409 states and 6994 transitions. [2021-07-13 19:37:21,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-13 19:37:21,290 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:37:21,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:37:21,294 INFO L225 Difference]: With dead ends: 2409 [2021-07-13 19:37:21,294 INFO L226 Difference]: Without dead ends: 2403 [2021-07-13 19:37:21,294 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 335 ImplicationChecksByTransitivity, 555.0ms TimeCoverageRelationStatistics Valid=145, Invalid=1415, Unknown=0, NotChecked=0, Total=1560 [2021-07-13 19:37:21,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2403 states. [2021-07-13 19:37:21,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2403 to 2255. [2021-07-13 19:37:21,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2255 states, 2254 states have (on average 2.9835847382431235) internal successors, (6725), 2254 states have internal predecessors, (6725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:37:21,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2255 states to 2255 states and 6725 transitions. [2021-07-13 19:37:21,320 INFO L78 Accepts]: Start accepts. Automaton has 2255 states and 6725 transitions. Word has length 19 [2021-07-13 19:37:21,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:37:21,320 INFO L482 AbstractCegarLoop]: Abstraction has 2255 states and 6725 transitions. [2021-07-13 19:37:21,320 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:37:21,320 INFO L276 IsEmpty]: Start isEmpty. Operand 2255 states and 6725 transitions. [2021-07-13 19:37:21,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:37:21,323 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:37:21,323 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:37:21,523 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3734,437 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:37:21,523 INFO L430 AbstractCegarLoop]: === Iteration 447 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:37:21,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:37:21,523 INFO L82 PathProgramCache]: Analyzing trace with hash 767001916, now seen corresponding path program 433 times [2021-07-13 19:37:21,523 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:37:21,523 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824774831] [2021-07-13 19:37:21,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:37:21,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:37:21,630 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:37:21,630 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:37:21,630 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824774831] [2021-07-13 19:37:21,630 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1824774831] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:37:21,630 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [400620080] [2021-07-13 19:37:21,630 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 438 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 438 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:37:21,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:37:21,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 19:37:21,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:37:21,804 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:37:21,804 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:37:21,805 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:37:21,805 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:37:21,807 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:37:21,807 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:37:21,808 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:37:21,825 INFO L628 ElimStorePlain]: treesize reduction 30, result has 33.3 percent of original size [2021-07-13 19:37:21,825 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:37:21,826 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:37:21,826 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:59, output treesize:15 [2021-07-13 19:37:21,850 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:37:21,850 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [400620080] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:37:21,850 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:37:21,851 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-07-13 19:37:21,851 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312388601] [2021-07-13 19:37:21,851 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:37:21,851 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:37:21,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:37:21,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=367, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:37:21,851 INFO L87 Difference]: Start difference. First operand 2255 states and 6725 transitions. Second operand has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:37:22,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:37:22,836 INFO L93 Difference]: Finished difference Result 2634 states and 7517 transitions. [2021-07-13 19:37:22,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-07-13 19:37:22,836 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:37:22,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:37:22,840 INFO L225 Difference]: With dead ends: 2634 [2021-07-13 19:37:22,840 INFO L226 Difference]: Without dead ends: 2632 [2021-07-13 19:37:22,840 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 694 ImplicationChecksByTransitivity, 824.2ms TimeCoverageRelationStatistics Valid=253, Invalid=2399, Unknown=0, NotChecked=0, Total=2652 [2021-07-13 19:37:22,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2632 states. [2021-07-13 19:37:22,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2632 to 2294. [2021-07-13 19:37:22,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2294 states, 2293 states have (on average 2.988661142607937) internal successors, (6853), 2293 states have internal predecessors, (6853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:37:22,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2294 states to 2294 states and 6853 transitions. [2021-07-13 19:37:22,869 INFO L78 Accepts]: Start accepts. Automaton has 2294 states and 6853 transitions. Word has length 19 [2021-07-13 19:37:22,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:37:22,869 INFO L482 AbstractCegarLoop]: Abstraction has 2294 states and 6853 transitions. [2021-07-13 19:37:22,869 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:37:22,870 INFO L276 IsEmpty]: Start isEmpty. Operand 2294 states and 6853 transitions. [2021-07-13 19:37:22,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:37:22,872 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:37:22,872 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:37:23,072 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 438 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3739 [2021-07-13 19:37:23,073 INFO L430 AbstractCegarLoop]: === Iteration 448 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:37:23,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:37:23,073 INFO L82 PathProgramCache]: Analyzing trace with hash -152698792, now seen corresponding path program 434 times [2021-07-13 19:37:23,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:37:23,073 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941878920] [2021-07-13 19:37:23,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:37:23,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:37:23,181 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:37:23,181 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:37:23,181 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941878920] [2021-07-13 19:37:23,181 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1941878920] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:37:23,181 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1106445625] [2021-07-13 19:37:23,181 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 439 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 439 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:37:23,211 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:37:23,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:37:23,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 19:37:23,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:37:23,361 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:37:23,362 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:37:23,362 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:37:23,363 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:37:23,365 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:37:23,366 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:37:23,366 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:37:23,367 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:37:23,368 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:37:23,369 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:37:23,371 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:37:23,372 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:37:23,374 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:37:23,375 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:37:23,376 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:37:23,377 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:37:23,404 INFO L628 ElimStorePlain]: treesize reduction 21, result has 58.0 percent of original size [2021-07-13 19:37:23,404 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:37:23,405 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:37:23,405 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 2 variables, input treesize:125, output treesize:29 [2021-07-13 19:37:23,438 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:37:23,438 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1106445625] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:37:23,438 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:37:23,438 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-07-13 19:37:23,438 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530857525] [2021-07-13 19:37:23,439 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:37:23,439 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:37:23,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:37:23,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=367, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:37:23,439 INFO L87 Difference]: Start difference. First operand 2294 states and 6853 transitions. Second operand has 21 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:37:24,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:37:24,374 INFO L93 Difference]: Finished difference Result 2456 states and 7146 transitions. [2021-07-13 19:37:24,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-07-13 19:37:24,374 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:37:24,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:37:24,378 INFO L225 Difference]: With dead ends: 2456 [2021-07-13 19:37:24,378 INFO L226 Difference]: Without dead ends: 2450 [2021-07-13 19:37:24,378 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 466 ImplicationChecksByTransitivity, 755.5ms TimeCoverageRelationStatistics Valid=195, Invalid=1785, Unknown=0, NotChecked=0, Total=1980 [2021-07-13 19:37:24,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2450 states. [2021-07-13 19:37:24,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2450 to 2301. [2021-07-13 19:37:24,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2301 states, 2300 states have (on average 2.9808695652173913) internal successors, (6856), 2300 states have internal predecessors, (6856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:37:24,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2301 states to 2301 states and 6856 transitions. [2021-07-13 19:37:24,411 INFO L78 Accepts]: Start accepts. Automaton has 2301 states and 6856 transitions. Word has length 19 [2021-07-13 19:37:24,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:37:24,411 INFO L482 AbstractCegarLoop]: Abstraction has 2301 states and 6856 transitions. [2021-07-13 19:37:24,411 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:37:24,411 INFO L276 IsEmpty]: Start isEmpty. Operand 2301 states and 6856 transitions. [2021-07-13 19:37:24,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:37:24,414 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:37:24,414 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:37:24,615 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3741,439 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:37:24,615 INFO L430 AbstractCegarLoop]: === Iteration 449 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:37:24,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:37:24,615 INFO L82 PathProgramCache]: Analyzing trace with hash 774732314, now seen corresponding path program 435 times [2021-07-13 19:37:24,615 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:37:24,615 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928718213] [2021-07-13 19:37:24,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:37:24,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:37:24,719 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:37:24,719 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:37:24,719 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928718213] [2021-07-13 19:37:24,719 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1928718213] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:37:24,719 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1227879117] [2021-07-13 19:37:24,719 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 440 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 440 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:37:24,749 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-13 19:37:24,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:37:24,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 19:37:24,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:37:24,880 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:37:24,880 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:37:24,881 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:37:24,882 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:37:24,884 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:37:24,884 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:37:24,884 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:37:24,885 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:37:24,887 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:37:24,887 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:37:24,888 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:37:24,888 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:37:24,890 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:37:24,890 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:37:24,891 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:37:24,923 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-07-13 19:37:24,923 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:37:24,924 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:37:24,924 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-07-13 19:37:24,980 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:37:24,980 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1227879117] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:37:24,980 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:37:24,980 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-07-13 19:37:24,980 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719845691] [2021-07-13 19:37:24,981 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:37:24,981 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:37:24,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:37:24,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=366, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:37:24,981 INFO L87 Difference]: Start difference. First operand 2301 states and 6856 transitions. Second operand has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:37:25,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:37:25,930 INFO L93 Difference]: Finished difference Result 2657 states and 7535 transitions. [2021-07-13 19:37:25,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-07-13 19:37:25,930 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:37:25,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:37:25,934 INFO L225 Difference]: With dead ends: 2657 [2021-07-13 19:37:25,934 INFO L226 Difference]: Without dead ends: 2655 [2021-07-13 19:37:25,934 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 558 ImplicationChecksByTransitivity, 807.3ms TimeCoverageRelationStatistics Valid=238, Invalid=2018, Unknown=0, NotChecked=0, Total=2256 [2021-07-13 19:37:25,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2655 states. [2021-07-13 19:37:25,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2655 to 2288. [2021-07-13 19:37:25,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2288 states, 2287 states have (on average 2.979011805859204) internal successors, (6813), 2287 states have internal predecessors, (6813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:37:25,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2288 states to 2288 states and 6813 transitions. [2021-07-13 19:37:25,963 INFO L78 Accepts]: Start accepts. Automaton has 2288 states and 6813 transitions. Word has length 19 [2021-07-13 19:37:25,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:37:25,964 INFO L482 AbstractCegarLoop]: Abstraction has 2288 states and 6813 transitions. [2021-07-13 19:37:25,964 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:37:25,964 INFO L276 IsEmpty]: Start isEmpty. Operand 2288 states and 6813 transitions. [2021-07-13 19:37:25,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:37:25,966 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:37:25,966 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:37:26,166 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3746,440 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:37:26,167 INFO L430 AbstractCegarLoop]: === Iteration 450 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:37:26,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:37:26,167 INFO L82 PathProgramCache]: Analyzing trace with hash 1576348542, now seen corresponding path program 436 times [2021-07-13 19:37:26,167 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:37:26,167 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527718008] [2021-07-13 19:37:26,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:37:26,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:37:26,276 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:37:26,276 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:37:26,276 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527718008] [2021-07-13 19:37:26,276 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1527718008] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:37:26,276 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2061806612] [2021-07-13 19:37:26,276 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 441 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 441 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:37:26,304 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:37:26,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:37:26,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 19:37:26,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:37:26,439 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:37:26,440 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:37:26,440 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:37:26,441 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:37:26,443 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:37:26,443 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:37:26,443 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:37:26,444 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:37:26,446 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:37:26,446 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:37:26,447 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:37:26,447 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:37:26,449 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:37:26,449 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:37:26,450 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:37:26,482 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-07-13 19:37:26,482 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:37:26,483 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:37:26,483 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-07-13 19:37:26,555 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:37:26,555 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2061806612] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:37:26,555 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:37:26,555 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-07-13 19:37:26,555 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790864500] [2021-07-13 19:37:26,555 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:37:26,555 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:37:26,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:37:26,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=366, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:37:26,556 INFO L87 Difference]: Start difference. First operand 2288 states and 6813 transitions. Second operand has 21 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:37:27,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:37:27,690 INFO L93 Difference]: Finished difference Result 2603 states and 7447 transitions. [2021-07-13 19:37:27,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-07-13 19:37:27,690 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:37:27,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:37:27,694 INFO L225 Difference]: With dead ends: 2603 [2021-07-13 19:37:27,694 INFO L226 Difference]: Without dead ends: 2598 [2021-07-13 19:37:27,694 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 778 ImplicationChecksByTransitivity, 970.1ms TimeCoverageRelationStatistics Valid=287, Invalid=2575, Unknown=0, NotChecked=0, Total=2862 [2021-07-13 19:37:27,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2598 states. [2021-07-13 19:37:27,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2598 to 2308. [2021-07-13 19:37:27,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2308 states, 2307 states have (on average 2.979627221499783) internal successors, (6874), 2307 states have internal predecessors, (6874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:37:27,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2308 states to 2308 states and 6874 transitions. [2021-07-13 19:37:27,723 INFO L78 Accepts]: Start accepts. Automaton has 2308 states and 6874 transitions. Word has length 19 [2021-07-13 19:37:27,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:37:27,723 INFO L482 AbstractCegarLoop]: Abstraction has 2308 states and 6874 transitions. [2021-07-13 19:37:27,723 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:37:27,723 INFO L276 IsEmpty]: Start isEmpty. Operand 2308 states and 6874 transitions. [2021-07-13 19:37:27,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:37:27,726 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:37:27,726 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:37:27,926 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3750,441 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:37:27,926 INFO L430 AbstractCegarLoop]: === Iteration 451 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:37:27,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:37:27,927 INFO L82 PathProgramCache]: Analyzing trace with hash -1000275048, now seen corresponding path program 437 times [2021-07-13 19:37:27,927 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:37:27,927 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113766938] [2021-07-13 19:37:27,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:37:27,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:37:28,032 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:37:28,032 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:37:28,032 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113766938] [2021-07-13 19:37:28,032 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2113766938] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:37:28,032 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [676492666] [2021-07-13 19:37:28,032 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 442 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 442 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:37:28,064 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-13 19:37:28,064 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:37:28,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 19:37:28,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:37:28,193 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:37:28,194 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:37:28,194 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:37:28,195 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:37:28,197 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:37:28,197 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:37:28,197 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:37:28,198 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:37:28,200 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:37:28,200 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:37:28,201 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:37:28,201 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:37:28,203 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:37:28,203 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:37:28,204 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:37:28,236 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-07-13 19:37:28,236 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:37:28,237 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:37:28,237 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-07-13 19:37:28,290 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:37:28,290 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [676492666] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:37:28,290 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:37:28,290 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-07-13 19:37:28,290 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260421650] [2021-07-13 19:37:28,290 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:37:28,291 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:37:28,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:37:28,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=366, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:37:28,291 INFO L87 Difference]: Start difference. First operand 2308 states and 6874 transitions. Second operand has 21 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:37:29,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:37:29,240 INFO L93 Difference]: Finished difference Result 2589 states and 7396 transitions. [2021-07-13 19:37:29,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-07-13 19:37:29,241 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:37:29,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:37:29,244 INFO L225 Difference]: With dead ends: 2589 [2021-07-13 19:37:29,244 INFO L226 Difference]: Without dead ends: 2589 [2021-07-13 19:37:29,244 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 496 ImplicationChecksByTransitivity, 798.9ms TimeCoverageRelationStatistics Valid=244, Invalid=1826, Unknown=0, NotChecked=0, Total=2070 [2021-07-13 19:37:29,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2589 states. [2021-07-13 19:37:29,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2589 to 2217. [2021-07-13 19:37:29,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2217 states, 2216 states have (on average 2.9657039711191335) internal successors, (6572), 2216 states have internal predecessors, (6572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:37:29,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2217 states to 2217 states and 6572 transitions. [2021-07-13 19:37:29,270 INFO L78 Accepts]: Start accepts. Automaton has 2217 states and 6572 transitions. Word has length 19 [2021-07-13 19:37:29,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:37:29,270 INFO L482 AbstractCegarLoop]: Abstraction has 2217 states and 6572 transitions. [2021-07-13 19:37:29,270 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:37:29,270 INFO L276 IsEmpty]: Start isEmpty. Operand 2217 states and 6572 transitions. [2021-07-13 19:37:29,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:37:29,273 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:37:29,273 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:37:29,473 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3755,442 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:37:29,473 INFO L430 AbstractCegarLoop]: === Iteration 452 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:37:29,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:37:29,473 INFO L82 PathProgramCache]: Analyzing trace with hash -839628416, now seen corresponding path program 438 times [2021-07-13 19:37:29,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:37:29,474 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429516771] [2021-07-13 19:37:29,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:37:29,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:37:29,562 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:37:29,563 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:37:29,563 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429516771] [2021-07-13 19:37:29,563 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1429516771] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:37:29,563 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1864237058] [2021-07-13 19:37:29,563 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 443 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 443 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:37:29,592 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-13 19:37:29,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:37:29,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 19:37:29,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:37:29,701 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:37:29,702 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:37:29,702 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:37:29,703 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:37:29,705 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:37:29,706 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:37:29,706 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:37:29,706 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:37:29,709 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:37:29,709 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:37:29,709 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:37:29,710 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:37:29,712 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:37:29,712 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:37:29,713 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:37:29,744 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-07-13 19:37:29,745 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:37:29,745 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:37:29,745 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-07-13 19:37:29,819 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:37:29,820 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1864237058] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:37:29,820 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:37:29,820 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 20 [2021-07-13 19:37:29,820 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970436636] [2021-07-13 19:37:29,820 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 19:37:29,820 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:37:29,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 19:37:29,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:37:29,820 INFO L87 Difference]: Start difference. First operand 2217 states and 6572 transitions. Second operand has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:37:30,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:37:30,797 INFO L93 Difference]: Finished difference Result 2408 states and 6911 transitions. [2021-07-13 19:37:30,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-07-13 19:37:30,797 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:37:30,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:37:30,800 INFO L225 Difference]: With dead ends: 2408 [2021-07-13 19:37:30,800 INFO L226 Difference]: Without dead ends: 2404 [2021-07-13 19:37:30,801 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 725 ImplicationChecksByTransitivity, 806.9ms TimeCoverageRelationStatistics Valid=250, Invalid=2402, Unknown=0, NotChecked=0, Total=2652 [2021-07-13 19:37:30,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2404 states. [2021-07-13 19:37:30,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2404 to 2218. [2021-07-13 19:37:30,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2218 states, 2217 states have (on average 2.962110960757781) internal successors, (6567), 2217 states have internal predecessors, (6567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:37:30,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2218 states to 2218 states and 6567 transitions. [2021-07-13 19:37:30,829 INFO L78 Accepts]: Start accepts. Automaton has 2218 states and 6567 transitions. Word has length 19 [2021-07-13 19:37:30,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:37:30,829 INFO L482 AbstractCegarLoop]: Abstraction has 2218 states and 6567 transitions. [2021-07-13 19:37:30,830 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:37:30,830 INFO L276 IsEmpty]: Start isEmpty. Operand 2218 states and 6567 transitions. [2021-07-13 19:37:30,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:37:30,832 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:37:30,832 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:37:31,032 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 443 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3759 [2021-07-13 19:37:31,033 INFO L430 AbstractCegarLoop]: === Iteration 453 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:37:31,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:37:31,033 INFO L82 PathProgramCache]: Analyzing trace with hash 358412698, now seen corresponding path program 439 times [2021-07-13 19:37:31,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:37:31,033 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346701668] [2021-07-13 19:37:31,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:37:31,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:37:31,138 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 1 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:37:31,138 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:37:31,138 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346701668] [2021-07-13 19:37:31,138 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1346701668] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:37:31,138 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1569785400] [2021-07-13 19:37:31,138 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 444 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 444 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:37:31,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:37:31,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 19:37:31,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:37:31,274 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:37:31,275 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:37:31,275 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:37:31,276 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:37:31,278 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:37:31,278 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:37:31,279 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:37:31,279 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:37:31,281 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:37:31,282 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:37:31,282 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:37:31,282 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:37:31,285 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:37:31,285 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:37:31,286 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:37:31,321 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-07-13 19:37:31,321 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:37:31,321 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:37:31,322 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-07-13 19:37:31,373 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:37:31,373 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1569785400] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:37:31,373 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:37:31,373 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 20 [2021-07-13 19:37:31,373 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873793439] [2021-07-13 19:37:31,373 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 19:37:31,373 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:37:31,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 19:37:31,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:37:31,374 INFO L87 Difference]: Start difference. First operand 2218 states and 6567 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:37:32,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:37:32,029 INFO L93 Difference]: Finished difference Result 2492 states and 7096 transitions. [2021-07-13 19:37:32,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-13 19:37:32,029 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:37:32,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:37:32,032 INFO L225 Difference]: With dead ends: 2492 [2021-07-13 19:37:32,032 INFO L226 Difference]: Without dead ends: 2488 [2021-07-13 19:37:32,033 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 321 ImplicationChecksByTransitivity, 514.1ms TimeCoverageRelationStatistics Valid=160, Invalid=1246, Unknown=0, NotChecked=0, Total=1406 [2021-07-13 19:37:32,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2488 states. [2021-07-13 19:37:32,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2488 to 2223. [2021-07-13 19:37:32,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2223 states, 2222 states have (on average 2.963996399639964) internal successors, (6586), 2222 states have internal predecessors, (6586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:37:32,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2223 states to 2223 states and 6586 transitions. [2021-07-13 19:37:32,061 INFO L78 Accepts]: Start accepts. Automaton has 2223 states and 6586 transitions. Word has length 19 [2021-07-13 19:37:32,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:37:32,061 INFO L482 AbstractCegarLoop]: Abstraction has 2223 states and 6586 transitions. [2021-07-13 19:37:32,061 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:37:32,061 INFO L276 IsEmpty]: Start isEmpty. Operand 2223 states and 6586 transitions. [2021-07-13 19:37:32,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:37:32,063 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:37:32,063 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:37:32,263 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3765,444 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:37:32,264 INFO L430 AbstractCegarLoop]: === Iteration 454 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:37:32,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:37:32,264 INFO L82 PathProgramCache]: Analyzing trace with hash 1160028926, now seen corresponding path program 440 times [2021-07-13 19:37:32,264 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:37:32,264 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596203951] [2021-07-13 19:37:32,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:37:32,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:37:32,375 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:37:32,375 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:37:32,375 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596203951] [2021-07-13 19:37:32,375 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1596203951] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:37:32,375 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1989278676] [2021-07-13 19:37:32,375 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 445 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 445 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:37:32,404 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:37:32,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:37:32,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 19:37:32,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:37:32,513 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:37:32,514 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:37:32,514 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:37:32,515 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:37:32,517 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:37:32,518 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:37:32,518 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:37:32,518 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:37:32,520 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:37:32,521 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:37:32,521 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:37:32,522 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:37:32,524 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:37:32,524 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:37:32,524 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:37:32,556 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-07-13 19:37:32,556 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:37:32,557 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:37:32,557 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-07-13 19:37:32,627 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:37:32,627 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1989278676] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:37:32,627 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:37:32,627 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 20 [2021-07-13 19:37:32,627 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061868311] [2021-07-13 19:37:32,627 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 19:37:32,627 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:37:32,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 19:37:32,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:37:32,627 INFO L87 Difference]: Start difference. First operand 2223 states and 6586 transitions. Second operand has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:37:33,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:37:33,635 INFO L93 Difference]: Finished difference Result 2547 states and 7260 transitions. [2021-07-13 19:37:33,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-07-13 19:37:33,636 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:37:33,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:37:33,639 INFO L225 Difference]: With dead ends: 2547 [2021-07-13 19:37:33,639 INFO L226 Difference]: Without dead ends: 2541 [2021-07-13 19:37:33,639 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 569 ImplicationChecksByTransitivity, 826.9ms TimeCoverageRelationStatistics Valid=232, Invalid=2024, Unknown=0, NotChecked=0, Total=2256 [2021-07-13 19:37:33,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2541 states. [2021-07-13 19:37:33,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2541 to 2244. [2021-07-13 19:37:33,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2244 states, 2243 states have (on average 2.965670976370932) internal successors, (6652), 2243 states have internal predecessors, (6652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:37:33,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2244 states to 2244 states and 6652 transitions. [2021-07-13 19:37:33,668 INFO L78 Accepts]: Start accepts. Automaton has 2244 states and 6652 transitions. Word has length 19 [2021-07-13 19:37:33,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:37:33,668 INFO L482 AbstractCegarLoop]: Abstraction has 2244 states and 6652 transitions. [2021-07-13 19:37:33,668 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:37:33,668 INFO L276 IsEmpty]: Start isEmpty. Operand 2244 states and 6652 transitions. [2021-07-13 19:37:33,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:37:33,671 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:37:33,671 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:37:33,871 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 445 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3769 [2021-07-13 19:37:33,871 INFO L430 AbstractCegarLoop]: === Iteration 455 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:37:33,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:37:33,871 INFO L82 PathProgramCache]: Analyzing trace with hash -1416594664, now seen corresponding path program 441 times [2021-07-13 19:37:33,871 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:37:33,871 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782074223] [2021-07-13 19:37:33,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:37:33,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:37:33,963 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:37:33,963 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:37:33,963 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782074223] [2021-07-13 19:37:33,963 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1782074223] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:37:33,963 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1861483293] [2021-07-13 19:37:33,963 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 446 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 446 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:37:33,992 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-13 19:37:33,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:37:33,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 19:37:33,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:37:34,099 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:37:34,100 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:37:34,100 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:37:34,101 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:37:34,103 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:37:34,103 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:37:34,103 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:37:34,104 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:37:34,106 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:37:34,107 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:37:34,107 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:37:34,107 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:37:34,109 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:37:34,109 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:37:34,110 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:37:34,142 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-07-13 19:37:34,142 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:37:34,143 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:37:34,143 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-07-13 19:37:34,192 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:37:34,192 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1861483293] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:37:34,192 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:37:34,192 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 20 [2021-07-13 19:37:34,192 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699054631] [2021-07-13 19:37:34,192 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 19:37:34,192 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:37:34,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 19:37:34,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:37:34,193 INFO L87 Difference]: Start difference. First operand 2244 states and 6652 transitions. Second operand has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:37:34,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:37:34,770 INFO L93 Difference]: Finished difference Result 2539 states and 7222 transitions. [2021-07-13 19:37:34,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-13 19:37:34,770 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:37:34,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:37:34,774 INFO L225 Difference]: With dead ends: 2539 [2021-07-13 19:37:34,774 INFO L226 Difference]: Without dead ends: 2537 [2021-07-13 19:37:34,774 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258 ImplicationChecksByTransitivity, 392.6ms TimeCoverageRelationStatistics Valid=138, Invalid=1052, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 19:37:34,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2537 states. [2021-07-13 19:37:34,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2537 to 2220. [2021-07-13 19:37:34,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2220 states, 2219 states have (on average 2.953582694907616) internal successors, (6554), 2219 states have internal predecessors, (6554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:37:34,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2220 states to 2220 states and 6554 transitions. [2021-07-13 19:37:34,801 INFO L78 Accepts]: Start accepts. Automaton has 2220 states and 6554 transitions. Word has length 19 [2021-07-13 19:37:34,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:37:34,801 INFO L482 AbstractCegarLoop]: Abstraction has 2220 states and 6554 transitions. [2021-07-13 19:37:34,802 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:37:34,802 INFO L276 IsEmpty]: Start isEmpty. Operand 2220 states and 6554 transitions. [2021-07-13 19:37:34,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:37:34,804 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:37:34,804 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:37:35,004 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3774,446 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:37:35,005 INFO L430 AbstractCegarLoop]: === Iteration 456 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:37:35,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:37:35,005 INFO L82 PathProgramCache]: Analyzing trace with hash 1167759324, now seen corresponding path program 442 times [2021-07-13 19:37:35,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:37:35,005 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944301711] [2021-07-13 19:37:35,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:37:35,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:37:35,094 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:37:35,095 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:37:35,095 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944301711] [2021-07-13 19:37:35,095 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [944301711] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:37:35,095 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [468229349] [2021-07-13 19:37:35,095 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 447 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 447 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:37:35,123 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:37:35,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:37:35,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 19:37:35,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:37:35,260 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:37:35,260 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:37:35,260 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:37:35,261 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:37:35,263 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:37:35,263 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:37:35,264 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:37:35,286 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-07-13 19:37:35,286 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:37:35,287 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:37:35,287 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-07-13 19:37:35,307 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:37:35,307 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [468229349] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:37:35,308 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:37:35,308 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 20 [2021-07-13 19:37:35,308 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488636155] [2021-07-13 19:37:35,308 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 19:37:35,308 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:37:35,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 19:37:35,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:37:35,308 INFO L87 Difference]: Start difference. First operand 2220 states and 6554 transitions. Second operand has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:37:35,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:37:35,892 INFO L93 Difference]: Finished difference Result 2563 states and 7274 transitions. [2021-07-13 19:37:35,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-13 19:37:35,892 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:37:35,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:37:35,896 INFO L225 Difference]: With dead ends: 2563 [2021-07-13 19:37:35,896 INFO L226 Difference]: Without dead ends: 2563 [2021-07-13 19:37:35,896 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 360.6ms TimeCoverageRelationStatistics Valid=127, Invalid=1063, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 19:37:35,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2563 states. [2021-07-13 19:37:35,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2563 to 2223. [2021-07-13 19:37:35,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2223 states, 2222 states have (on average 2.9531953195319534) internal successors, (6562), 2222 states have internal predecessors, (6562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:37:35,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2223 states to 2223 states and 6562 transitions. [2021-07-13 19:37:35,926 INFO L78 Accepts]: Start accepts. Automaton has 2223 states and 6562 transitions. Word has length 19 [2021-07-13 19:37:35,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:37:35,926 INFO L482 AbstractCegarLoop]: Abstraction has 2223 states and 6562 transitions. [2021-07-13 19:37:35,927 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:37:35,927 INFO L276 IsEmpty]: Start isEmpty. Operand 2223 states and 6562 transitions. [2021-07-13 19:37:35,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:37:35,929 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:37:35,929 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:37:36,129 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 447 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3778 [2021-07-13 19:37:36,130 INFO L430 AbstractCegarLoop]: === Iteration 457 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:37:36,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:37:36,130 INFO L82 PathProgramCache]: Analyzing trace with hash 337406490, now seen corresponding path program 443 times [2021-07-13 19:37:36,130 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:37:36,130 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317373895] [2021-07-13 19:37:36,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:37:36,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:37:36,227 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 2 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:37:36,227 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:37:36,228 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317373895] [2021-07-13 19:37:36,228 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [317373895] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:37:36,228 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1677578728] [2021-07-13 19:37:36,228 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 448 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 448 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:37:36,257 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:37:36,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:37:36,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 19:37:36,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:37:36,377 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:37:36,377 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:37:36,377 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:37:36,378 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:37:36,380 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:37:36,381 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:37:36,381 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:37:36,382 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:37:36,384 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:37:36,384 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:37:36,384 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:37:36,385 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:37:36,387 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:37:36,387 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:37:36,388 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:37:36,420 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-07-13 19:37:36,420 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:37:36,420 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:37:36,421 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-07-13 19:37:36,471 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:37:36,471 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1677578728] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:37:36,471 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:37:36,471 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 20 [2021-07-13 19:37:36,471 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551504038] [2021-07-13 19:37:36,471 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 19:37:36,471 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:37:36,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 19:37:36,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:37:36,471 INFO L87 Difference]: Start difference. First operand 2223 states and 6562 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:37:37,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:37:37,006 INFO L93 Difference]: Finished difference Result 2401 states and 6892 transitions. [2021-07-13 19:37:37,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-13 19:37:37,006 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:37:37,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:37:37,009 INFO L225 Difference]: With dead ends: 2401 [2021-07-13 19:37:37,009 INFO L226 Difference]: Without dead ends: 2399 [2021-07-13 19:37:37,009 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 443.1ms TimeCoverageRelationStatistics Valid=129, Invalid=993, Unknown=0, NotChecked=0, Total=1122 [2021-07-13 19:37:37,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2399 states. [2021-07-13 19:37:37,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2399 to 2211. [2021-07-13 19:37:37,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2211 states, 2210 states have (on average 2.951131221719457) internal successors, (6522), 2210 states have internal predecessors, (6522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:37:37,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2211 states to 2211 states and 6522 transitions. [2021-07-13 19:37:37,034 INFO L78 Accepts]: Start accepts. Automaton has 2211 states and 6522 transitions. Word has length 19 [2021-07-13 19:37:37,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:37:37,034 INFO L482 AbstractCegarLoop]: Abstraction has 2211 states and 6522 transitions. [2021-07-13 19:37:37,034 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:37:37,034 INFO L276 IsEmpty]: Start isEmpty. Operand 2211 states and 6522 transitions. [2021-07-13 19:37:37,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:37:37,037 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:37:37,037 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:37:37,237 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 448 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3781 [2021-07-13 19:37:37,237 INFO L430 AbstractCegarLoop]: === Iteration 458 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:37:37,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:37:37,238 INFO L82 PathProgramCache]: Analyzing trace with hash 1944927676, now seen corresponding path program 444 times [2021-07-13 19:37:37,238 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:37:37,238 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115587481] [2021-07-13 19:37:37,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:37:37,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:37:37,351 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:37:37,351 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:37:37,351 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115587481] [2021-07-13 19:37:37,351 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [115587481] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:37:37,352 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1792769266] [2021-07-13 19:37:37,352 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 449 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 449 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:37:37,381 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:37:37,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:37:37,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 19:37:37,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:37:37,500 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:37:37,500 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:37:37,500 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:37:37,501 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:37:37,503 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:37:37,504 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:37:37,504 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:37:37,505 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:37:37,507 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:37:37,507 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:37:37,507 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:37:37,508 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:37:37,510 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:37:37,510 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:37:37,511 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:37:37,543 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-07-13 19:37:37,544 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:37:37,544 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:37:37,544 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-07-13 19:37:37,608 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:37:37,608 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1792769266] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:37:37,609 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:37:37,609 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 20 [2021-07-13 19:37:37,609 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54867641] [2021-07-13 19:37:37,609 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 19:37:37,609 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:37:37,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 19:37:37,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:37:37,609 INFO L87 Difference]: Start difference. First operand 2211 states and 6522 transitions. Second operand has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:37:38,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:37:38,358 INFO L93 Difference]: Finished difference Result 2380 states and 6825 transitions. [2021-07-13 19:37:38,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-07-13 19:37:38,359 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:37:38,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:37:38,362 INFO L225 Difference]: With dead ends: 2380 [2021-07-13 19:37:38,362 INFO L226 Difference]: Without dead ends: 2376 [2021-07-13 19:37:38,362 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 505 ImplicationChecksByTransitivity, 633.4ms TimeCoverageRelationStatistics Valid=192, Invalid=1700, Unknown=0, NotChecked=0, Total=1892 [2021-07-13 19:37:38,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2376 states. [2021-07-13 19:37:38,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2376 to 2207. [2021-07-13 19:37:38,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2207 states, 2206 states have (on average 2.9505893019038987) internal successors, (6509), 2206 states have internal predecessors, (6509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:37:38,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2207 states to 2207 states and 6509 transitions. [2021-07-13 19:37:38,387 INFO L78 Accepts]: Start accepts. Automaton has 2207 states and 6509 transitions. Word has length 19 [2021-07-13 19:37:38,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:37:38,387 INFO L482 AbstractCegarLoop]: Abstraction has 2207 states and 6509 transitions. [2021-07-13 19:37:38,387 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:37:38,388 INFO L276 IsEmpty]: Start isEmpty. Operand 2207 states and 6509 transitions. [2021-07-13 19:37:38,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:37:38,390 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:37:38,390 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:37:38,590 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3785,449 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:37:38,590 INFO L430 AbstractCegarLoop]: === Iteration 459 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:37:38,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:37:38,591 INFO L82 PathProgramCache]: Analyzing trace with hash -620992286, now seen corresponding path program 445 times [2021-07-13 19:37:38,591 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:37:38,591 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125360829] [2021-07-13 19:37:38,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:37:38,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:37:38,691 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:37:38,691 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:37:38,691 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125360829] [2021-07-13 19:37:38,691 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2125360829] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:37:38,691 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1640390819] [2021-07-13 19:37:38,691 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 450 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 450 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:37:38,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:37:38,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 19:37:38,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:37:38,924 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:37:38,925 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:37:38,933 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:37:38,935 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:37:38,937 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:37:38,938 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:37:38,938 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:37:38,939 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:37:38,941 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:37:38,944 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:37:38,946 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:37:38,947 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:37:38,963 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:37:38,963 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:37:38,964 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:37:38,996 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-07-13 19:37:38,997 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:37:38,998 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:37:38,998 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-07-13 19:37:39,043 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:37:39,043 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1640390819] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:37:39,043 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:37:39,043 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 20 [2021-07-13 19:37:39,043 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945846420] [2021-07-13 19:37:39,044 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 19:37:39,044 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:37:39,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 19:37:39,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=330, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:37:39,044 INFO L87 Difference]: Start difference. First operand 2207 states and 6509 transitions. Second operand has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:37:39,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:37:39,798 INFO L93 Difference]: Finished difference Result 2338 states and 6745 transitions. [2021-07-13 19:37:39,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-13 19:37:39,798 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:37:39,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:37:39,802 INFO L225 Difference]: With dead ends: 2338 [2021-07-13 19:37:39,802 INFO L226 Difference]: Without dead ends: 2330 [2021-07-13 19:37:39,802 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 646.0ms TimeCoverageRelationStatistics Valid=157, Invalid=1325, Unknown=0, NotChecked=0, Total=1482 [2021-07-13 19:37:39,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2330 states. [2021-07-13 19:37:39,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2330 to 2205. [2021-07-13 19:37:39,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2205 states, 2204 states have (on average 2.9478221415607986) internal successors, (6497), 2204 states have internal predecessors, (6497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:37:39,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2205 states to 2205 states and 6497 transitions. [2021-07-13 19:37:39,829 INFO L78 Accepts]: Start accepts. Automaton has 2205 states and 6497 transitions. Word has length 19 [2021-07-13 19:37:39,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:37:39,829 INFO L482 AbstractCegarLoop]: Abstraction has 2205 states and 6497 transitions. [2021-07-13 19:37:39,829 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:37:39,829 INFO L276 IsEmpty]: Start isEmpty. Operand 2205 states and 6497 transitions. [2021-07-13 19:37:39,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:37:39,831 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:37:39,831 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:37:40,032 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3791,450 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:37:40,032 INFO L430 AbstractCegarLoop]: === Iteration 460 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:37:40,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:37:40,032 INFO L82 PathProgramCache]: Analyzing trace with hash 1146753116, now seen corresponding path program 446 times [2021-07-13 19:37:40,032 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:37:40,032 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589845571] [2021-07-13 19:37:40,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:37:40,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:37:40,162 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:37:40,162 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:37:40,162 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589845571] [2021-07-13 19:37:40,163 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1589845571] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:37:40,163 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1915936782] [2021-07-13 19:37:40,163 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 451 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 451 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:37:40,192 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:37:40,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:37:40,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 19:37:40,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:37:40,359 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:37:40,360 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:37:40,360 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:37:40,361 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:37:40,363 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:37:40,363 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:37:40,364 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:37:40,387 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-07-13 19:37:40,388 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:37:40,388 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:37:40,388 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-07-13 19:37:40,411 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:37:40,412 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1915936782] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:37:40,412 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:37:40,412 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 20 [2021-07-13 19:37:40,412 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584464935] [2021-07-13 19:37:40,412 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 19:37:40,412 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:37:40,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 19:37:40,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:37:40,412 INFO L87 Difference]: Start difference. First operand 2205 states and 6497 transitions. Second operand has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:37:41,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:37:41,248 INFO L93 Difference]: Finished difference Result 2482 states and 7063 transitions. [2021-07-13 19:37:41,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-13 19:37:41,248 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:37:41,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:37:41,252 INFO L225 Difference]: With dead ends: 2482 [2021-07-13 19:37:41,252 INFO L226 Difference]: Without dead ends: 2478 [2021-07-13 19:37:41,253 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 360 ImplicationChecksByTransitivity, 641.3ms TimeCoverageRelationStatistics Valid=182, Invalid=1378, Unknown=0, NotChecked=0, Total=1560 [2021-07-13 19:37:41,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2478 states. [2021-07-13 19:37:41,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2478 to 2199. [2021-07-13 19:37:41,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2199 states, 2198 states have (on average 2.9426751592356686) internal successors, (6468), 2198 states have internal predecessors, (6468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:37:41,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2199 states to 2199 states and 6468 transitions. [2021-07-13 19:37:41,283 INFO L78 Accepts]: Start accepts. Automaton has 2199 states and 6468 transitions. Word has length 19 [2021-07-13 19:37:41,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:37:41,283 INFO L482 AbstractCegarLoop]: Abstraction has 2199 states and 6468 transitions. [2021-07-13 19:37:41,283 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:37:41,283 INFO L276 IsEmpty]: Start isEmpty. Operand 2199 states and 6468 transitions. [2021-07-13 19:37:41,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:37:41,286 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:37:41,286 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:37:41,502 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3798,451 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:37:41,503 INFO L430 AbstractCegarLoop]: === Iteration 461 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:37:41,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:37:41,503 INFO L82 PathProgramCache]: Analyzing trace with hash 1439867516, now seen corresponding path program 447 times [2021-07-13 19:37:41,503 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:37:41,503 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531128030] [2021-07-13 19:37:41,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:37:41,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:37:41,590 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:37:41,591 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:37:41,591 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531128030] [2021-07-13 19:37:41,591 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1531128030] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:37:41,591 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1530827983] [2021-07-13 19:37:41,591 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 452 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 452 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:37:41,619 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 19:37:41,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:37:41,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 19:37:41,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:37:41,795 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:37:41,796 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:37:41,798 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:37:41,799 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:37:41,801 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:37:41,802 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:37:41,802 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:37:41,803 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:37:41,805 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:37:41,806 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:37:41,808 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:37:41,809 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:37:41,811 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:37:41,811 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:37:41,812 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:37:41,841 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-07-13 19:37:41,841 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:37:41,842 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:37:41,842 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-07-13 19:37:41,871 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:37:41,871 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1530827983] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:37:41,871 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:37:41,871 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 20 [2021-07-13 19:37:41,871 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304526511] [2021-07-13 19:37:41,872 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 19:37:41,872 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:37:41,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 19:37:41,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:37:41,872 INFO L87 Difference]: Start difference. First operand 2199 states and 6468 transitions. Second operand has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:37:42,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:37:42,535 INFO L93 Difference]: Finished difference Result 2299 states and 6645 transitions. [2021-07-13 19:37:42,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-13 19:37:42,535 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:37:42,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:37:42,539 INFO L225 Difference]: With dead ends: 2299 [2021-07-13 19:37:42,539 INFO L226 Difference]: Without dead ends: 2287 [2021-07-13 19:37:42,539 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 560.4ms TimeCoverageRelationStatistics Valid=139, Invalid=1193, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 19:37:42,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2287 states. [2021-07-13 19:37:42,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2287 to 2199. [2021-07-13 19:37:42,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2199 states, 2198 states have (on average 2.9381255686988172) internal successors, (6458), 2198 states have internal predecessors, (6458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:37:42,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2199 states to 2199 states and 6458 transitions. [2021-07-13 19:37:42,565 INFO L78 Accepts]: Start accepts. Automaton has 2199 states and 6458 transitions. Word has length 19 [2021-07-13 19:37:42,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:37:42,565 INFO L482 AbstractCegarLoop]: Abstraction has 2199 states and 6458 transitions. [2021-07-13 19:37:42,565 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:37:42,565 INFO L276 IsEmpty]: Start isEmpty. Operand 2199 states and 6458 transitions. [2021-07-13 19:37:42,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:37:42,567 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:37:42,567 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:37:42,768 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 452 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3801 [2021-07-13 19:37:42,768 INFO L430 AbstractCegarLoop]: === Iteration 462 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:37:42,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:37:42,768 INFO L82 PathProgramCache]: Analyzing trace with hash -342651880, now seen corresponding path program 448 times [2021-07-13 19:37:42,768 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:37:42,768 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275985774] [2021-07-13 19:37:42,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:37:42,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:37:42,855 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:37:42,855 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:37:42,855 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275985774] [2021-07-13 19:37:42,855 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [275985774] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:37:42,855 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1226671959] [2021-07-13 19:37:42,855 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 453 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 453 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:37:42,993 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:37:42,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:37:42,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 19:37:42,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:37:43,143 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:37:43,144 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:37:43,144 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:37:43,145 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:37:43,147 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:37:43,147 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:37:43,148 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:37:43,170 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-07-13 19:37:43,170 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:37:43,171 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:37:43,171 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-07-13 19:37:43,193 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:37:43,193 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1226671959] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:37:43,193 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:37:43,193 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 20 [2021-07-13 19:37:43,193 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629308963] [2021-07-13 19:37:43,193 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 19:37:43,193 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:37:43,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 19:37:43,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=330, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:37:43,194 INFO L87 Difference]: Start difference. First operand 2199 states and 6458 transitions. Second operand has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:37:43,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:37:43,573 INFO L93 Difference]: Finished difference Result 2465 states and 7055 transitions. [2021-07-13 19:37:43,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 19:37:43,573 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:37:43,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:37:43,578 INFO L225 Difference]: With dead ends: 2465 [2021-07-13 19:37:43,578 INFO L226 Difference]: Without dead ends: 2465 [2021-07-13 19:37:43,578 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 246.7ms TimeCoverageRelationStatistics Valid=68, Invalid=484, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:37:43,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2465 states. [2021-07-13 19:37:43,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2465 to 2205. [2021-07-13 19:37:43,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2205 states, 2204 states have (on average 2.939201451905626) internal successors, (6478), 2204 states have internal predecessors, (6478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:37:43,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2205 states to 2205 states and 6478 transitions. [2021-07-13 19:37:43,609 INFO L78 Accepts]: Start accepts. Automaton has 2205 states and 6478 transitions. Word has length 19 [2021-07-13 19:37:43,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:37:43,609 INFO L482 AbstractCegarLoop]: Abstraction has 2205 states and 6478 transitions. [2021-07-13 19:37:43,609 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:37:43,609 INFO L276 IsEmpty]: Start isEmpty. Operand 2205 states and 6478 transitions. [2021-07-13 19:37:43,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:37:43,612 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:37:43,612 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:37:43,813 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 453 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3808 [2021-07-13 19:37:43,813 INFO L430 AbstractCegarLoop]: === Iteration 463 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:37:43,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:37:43,813 INFO L82 PathProgramCache]: Analyzing trace with hash -313785958, now seen corresponding path program 449 times [2021-07-13 19:37:43,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:37:43,813 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795011468] [2021-07-13 19:37:43,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:37:43,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:37:43,920 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 1 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:37:43,920 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:37:43,920 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795011468] [2021-07-13 19:37:43,921 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [795011468] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:37:43,921 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [517110372] [2021-07-13 19:37:43,921 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 454 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 454 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:37:43,951 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:37:43,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:37:43,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 19:37:43,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:37:44,096 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:37:44,096 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:37:44,097 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:37:44,098 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:37:44,100 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:37:44,100 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:37:44,100 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:37:44,101 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:37:44,103 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:37:44,103 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:37:44,103 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:37:44,104 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:37:44,106 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:37:44,106 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:37:44,107 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:37:44,138 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-07-13 19:37:44,138 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:37:44,139 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:37:44,139 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-07-13 19:37:44,194 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:37:44,194 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [517110372] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:37:44,194 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:37:44,194 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 20 [2021-07-13 19:37:44,194 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565751214] [2021-07-13 19:37:44,196 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 19:37:44,196 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:37:44,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 19:37:44,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:37:44,196 INFO L87 Difference]: Start difference. First operand 2205 states and 6478 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:37:44,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:37:44,655 INFO L93 Difference]: Finished difference Result 2452 states and 7010 transitions. [2021-07-13 19:37:44,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 19:37:44,656 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:37:44,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:37:44,659 INFO L225 Difference]: With dead ends: 2452 [2021-07-13 19:37:44,659 INFO L226 Difference]: Without dead ends: 2451 [2021-07-13 19:37:44,660 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 410.4ms TimeCoverageRelationStatistics Valid=93, Invalid=663, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:37:44,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2451 states. [2021-07-13 19:37:44,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2451 to 2222. [2021-07-13 19:37:44,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2222 states, 2221 states have (on average 2.9477712742008104) internal successors, (6547), 2221 states have internal predecessors, (6547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:37:44,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2222 states to 2222 states and 6547 transitions. [2021-07-13 19:37:44,709 INFO L78 Accepts]: Start accepts. Automaton has 2222 states and 6547 transitions. Word has length 19 [2021-07-13 19:37:44,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:37:44,710 INFO L482 AbstractCegarLoop]: Abstraction has 2222 states and 6547 transitions. [2021-07-13 19:37:44,710 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:37:44,710 INFO L276 IsEmpty]: Start isEmpty. Operand 2222 states and 6547 transitions. [2021-07-13 19:37:44,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:37:44,712 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:37:44,713 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:37:44,913 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 454 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3811 [2021-07-13 19:37:44,913 INFO L430 AbstractCegarLoop]: === Iteration 464 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:37:44,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:37:44,913 INFO L82 PathProgramCache]: Analyzing trace with hash 487830270, now seen corresponding path program 450 times [2021-07-13 19:37:44,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:37:44,914 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213248042] [2021-07-13 19:37:44,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:37:44,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:37:45,056 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:37:45,056 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:37:45,056 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213248042] [2021-07-13 19:37:45,056 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1213248042] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:37:45,056 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1159154866] [2021-07-13 19:37:45,056 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 455 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 455 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:37:45,086 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-13 19:37:45,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:37:45,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 19:37:45,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:37:45,228 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:37:45,229 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:37:45,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:37:45,230 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:37:45,232 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:37:45,232 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:37:45,233 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:37:45,233 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:37:45,235 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:37:45,235 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:37:45,236 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:37:45,236 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:37:45,238 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:37:45,238 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:37:45,239 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:37:45,270 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-07-13 19:37:45,270 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:37:45,271 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:37:45,271 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-07-13 19:37:45,345 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:37:45,345 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1159154866] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:37:45,345 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:37:45,345 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 20 [2021-07-13 19:37:45,346 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488037898] [2021-07-13 19:37:45,346 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 19:37:45,346 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:37:45,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 19:37:45,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:37:45,346 INFO L87 Difference]: Start difference. First operand 2222 states and 6547 transitions. Second operand has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:37:46,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:37:46,298 INFO L93 Difference]: Finished difference Result 2473 states and 7056 transitions. [2021-07-13 19:37:46,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-07-13 19:37:46,298 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:37:46,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:37:46,302 INFO L225 Difference]: With dead ends: 2473 [2021-07-13 19:37:46,302 INFO L226 Difference]: Without dead ends: 2463 [2021-07-13 19:37:46,302 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 421 ImplicationChecksByTransitivity, 851.2ms TimeCoverageRelationStatistics Valid=185, Invalid=1537, Unknown=0, NotChecked=0, Total=1722 [2021-07-13 19:37:46,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2463 states. [2021-07-13 19:37:46,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2463 to 2231. [2021-07-13 19:37:46,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2231 states, 2230 states have (on average 2.947085201793722) internal successors, (6572), 2230 states have internal predecessors, (6572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:37:46,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2231 states to 2231 states and 6572 transitions. [2021-07-13 19:37:46,333 INFO L78 Accepts]: Start accepts. Automaton has 2231 states and 6572 transitions. Word has length 19 [2021-07-13 19:37:46,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:37:46,333 INFO L482 AbstractCegarLoop]: Abstraction has 2231 states and 6572 transitions. [2021-07-13 19:37:46,333 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:37:46,333 INFO L276 IsEmpty]: Start isEmpty. Operand 2231 states and 6572 transitions. [2021-07-13 19:37:46,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:37:46,336 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:37:46,336 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:37:46,537 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 455 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3815 [2021-07-13 19:37:46,537 INFO L430 AbstractCegarLoop]: === Iteration 465 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:37:46,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:37:46,537 INFO L82 PathProgramCache]: Analyzing trace with hash -2088793320, now seen corresponding path program 451 times [2021-07-13 19:37:46,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:37:46,537 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050170461] [2021-07-13 19:37:46,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:37:46,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:37:46,637 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:37:46,637 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:37:46,637 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050170461] [2021-07-13 19:37:46,637 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1050170461] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:37:46,637 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2018345669] [2021-07-13 19:37:46,637 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 456 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 456 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:37:46,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:37:46,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 19:37:46,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:37:46,790 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:37:46,791 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:37:46,791 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:37:46,792 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:37:46,794 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:37:46,794 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:37:46,794 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:37:46,795 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:37:46,797 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:37:46,798 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:37:46,798 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:37:46,798 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:37:46,800 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:37:46,801 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:37:46,801 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:37:46,833 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-07-13 19:37:46,833 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:37:46,834 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:37:46,834 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-07-13 19:37:46,882 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:37:46,883 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2018345669] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:37:46,883 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:37:46,883 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 20 [2021-07-13 19:37:46,883 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934575268] [2021-07-13 19:37:46,883 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 19:37:46,883 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:37:46,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 19:37:46,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:37:46,883 INFO L87 Difference]: Start difference. First operand 2231 states and 6572 transitions. Second operand has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:37:47,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:37:47,466 INFO L93 Difference]: Finished difference Result 2450 states and 7009 transitions. [2021-07-13 19:37:47,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-13 19:37:47,466 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:37:47,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:37:47,470 INFO L225 Difference]: With dead ends: 2450 [2021-07-13 19:37:47,470 INFO L226 Difference]: Without dead ends: 2450 [2021-07-13 19:37:47,470 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 544.6ms TimeCoverageRelationStatistics Valid=150, Invalid=1040, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 19:37:47,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2450 states. [2021-07-13 19:37:47,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2450 to 2209. [2021-07-13 19:37:47,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2209 states, 2208 states have (on average 2.9384057971014492) internal successors, (6488), 2208 states have internal predecessors, (6488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:37:47,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2209 states to 2209 states and 6488 transitions. [2021-07-13 19:37:47,497 INFO L78 Accepts]: Start accepts. Automaton has 2209 states and 6488 transitions. Word has length 19 [2021-07-13 19:37:47,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:37:47,497 INFO L482 AbstractCegarLoop]: Abstraction has 2209 states and 6488 transitions. [2021-07-13 19:37:47,497 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:37:47,497 INFO L276 IsEmpty]: Start isEmpty. Operand 2209 states and 6488 transitions. [2021-07-13 19:37:47,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:37:47,499 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:37:47,499 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:37:47,700 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3820,456 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:37:47,700 INFO L430 AbstractCegarLoop]: === Iteration 466 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:37:47,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:37:47,700 INFO L82 PathProgramCache]: Analyzing trace with hash 495560668, now seen corresponding path program 452 times [2021-07-13 19:37:47,700 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:37:47,700 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514617071] [2021-07-13 19:37:47,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:37:47,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:37:47,796 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:37:47,796 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:37:47,796 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514617071] [2021-07-13 19:37:47,796 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1514617071] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:37:47,796 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [463730950] [2021-07-13 19:37:47,796 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 457 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 457 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:37:47,825 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:37:47,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:37:47,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 19:37:47,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:37:47,981 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:37:47,982 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:37:47,982 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:37:47,983 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:37:47,985 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:37:47,986 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:37:47,986 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:37:48,010 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-07-13 19:37:48,011 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:37:48,011 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:37:48,012 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-07-13 19:37:48,032 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:37:48,032 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [463730950] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:37:48,032 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:37:48,032 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 20 [2021-07-13 19:37:48,033 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31019981] [2021-07-13 19:37:48,033 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 19:37:48,033 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:37:48,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 19:37:48,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:37:48,033 INFO L87 Difference]: Start difference. First operand 2209 states and 6488 transitions. Second operand has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:37:48,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:37:48,946 INFO L93 Difference]: Finished difference Result 2513 states and 7080 transitions. [2021-07-13 19:37:48,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-07-13 19:37:48,946 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:37:48,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:37:48,950 INFO L225 Difference]: With dead ends: 2513 [2021-07-13 19:37:48,950 INFO L226 Difference]: Without dead ends: 2507 [2021-07-13 19:37:48,950 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 442 ImplicationChecksByTransitivity, 680.4ms TimeCoverageRelationStatistics Valid=201, Invalid=1605, Unknown=0, NotChecked=0, Total=1806 [2021-07-13 19:37:48,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2507 states. [2021-07-13 19:37:48,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2507 to 2188. [2021-07-13 19:37:48,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2188 states, 2187 states have (on average 2.9350708733424784) internal successors, (6419), 2187 states have internal predecessors, (6419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:37:48,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2188 states to 2188 states and 6419 transitions. [2021-07-13 19:37:48,978 INFO L78 Accepts]: Start accepts. Automaton has 2188 states and 6419 transitions. Word has length 19 [2021-07-13 19:37:48,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:37:48,978 INFO L482 AbstractCegarLoop]: Abstraction has 2188 states and 6419 transitions. [2021-07-13 19:37:48,978 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:37:48,978 INFO L276 IsEmpty]: Start isEmpty. Operand 2188 states and 6419 transitions. [2021-07-13 19:37:48,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:37:48,980 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:37:48,980 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:37:49,181 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 457 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3824 [2021-07-13 19:37:49,181 INFO L430 AbstractCegarLoop]: === Iteration 467 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:37:49,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:37:49,181 INFO L82 PathProgramCache]: Analyzing trace with hash -993844328, now seen corresponding path program 453 times [2021-07-13 19:37:49,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:37:49,181 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949812342] [2021-07-13 19:37:49,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:37:49,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:37:49,269 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:37:49,270 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:37:49,270 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949812342] [2021-07-13 19:37:49,270 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [949812342] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:37:49,270 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [858912858] [2021-07-13 19:37:49,270 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 458 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 458 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:37:49,299 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-13 19:37:49,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:37:49,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 19:37:49,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:37:49,451 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:37:49,452 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:37:49,452 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:37:49,453 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:37:49,455 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:37:49,455 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:37:49,456 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:37:49,477 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-07-13 19:37:49,477 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:37:49,478 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:37:49,478 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-07-13 19:37:49,499 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:37:49,500 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [858912858] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:37:49,500 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:37:49,500 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 20 [2021-07-13 19:37:49,500 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240618698] [2021-07-13 19:37:49,500 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 19:37:49,500 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:37:49,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 19:37:49,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:37:49,500 INFO L87 Difference]: Start difference. First operand 2188 states and 6419 transitions. Second operand has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:37:50,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:37:50,593 INFO L93 Difference]: Finished difference Result 2513 states and 7095 transitions. [2021-07-13 19:37:50,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-07-13 19:37:50,594 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:37:50,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:37:50,597 INFO L225 Difference]: With dead ends: 2513 [2021-07-13 19:37:50,597 INFO L226 Difference]: Without dead ends: 2513 [2021-07-13 19:37:50,597 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 641 ImplicationChecksByTransitivity, 907.1ms TimeCoverageRelationStatistics Valid=292, Invalid=2258, Unknown=0, NotChecked=0, Total=2550 [2021-07-13 19:37:50,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2513 states. [2021-07-13 19:37:50,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2513 to 2207. [2021-07-13 19:37:50,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2207 states, 2206 states have (on average 2.9324569356301) internal successors, (6469), 2206 states have internal predecessors, (6469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:37:50,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2207 states to 2207 states and 6469 transitions. [2021-07-13 19:37:50,623 INFO L78 Accepts]: Start accepts. Automaton has 2207 states and 6469 transitions. Word has length 19 [2021-07-13 19:37:50,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:37:50,623 INFO L482 AbstractCegarLoop]: Abstraction has 2207 states and 6469 transitions. [2021-07-13 19:37:50,623 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:37:50,623 INFO L276 IsEmpty]: Start isEmpty. Operand 2207 states and 6469 transitions. [2021-07-13 19:37:50,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:37:50,625 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:37:50,625 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:37:50,825 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 458 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3827 [2021-07-13 19:37:50,825 INFO L430 AbstractCegarLoop]: === Iteration 468 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:37:50,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:37:50,826 INFO L82 PathProgramCache]: Analyzing trace with hash 79241052, now seen corresponding path program 454 times [2021-07-13 19:37:50,826 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:37:50,826 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19152143] [2021-07-13 19:37:50,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:37:50,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:37:50,926 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:37:50,926 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:37:50,927 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19152143] [2021-07-13 19:37:50,927 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [19152143] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:37:50,927 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1421215553] [2021-07-13 19:37:50,927 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 459 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 459 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:37:50,956 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:37:50,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:37:50,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 19:37:50,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:37:51,113 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:37:51,113 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:37:51,113 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:37:51,114 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:37:51,116 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:37:51,117 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:37:51,117 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:37:51,139 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-07-13 19:37:51,139 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:37:51,140 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:37:51,140 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-07-13 19:37:51,161 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:37:51,162 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1421215553] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:37:51,162 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:37:51,162 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 20 [2021-07-13 19:37:51,162 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578461930] [2021-07-13 19:37:51,162 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 19:37:51,162 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:37:51,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 19:37:51,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=333, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:37:51,162 INFO L87 Difference]: Start difference. First operand 2207 states and 6469 transitions. Second operand has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:37:51,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:37:51,481 INFO L93 Difference]: Finished difference Result 2348 states and 6752 transitions. [2021-07-13 19:37:51,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 19:37:51,481 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:37:51,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:37:51,484 INFO L225 Difference]: With dead ends: 2348 [2021-07-13 19:37:51,484 INFO L226 Difference]: Without dead ends: 2348 [2021-07-13 19:37:51,484 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 230.9ms TimeCoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:37:51,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2348 states. [2021-07-13 19:37:51,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2348 to 2194. [2021-07-13 19:37:51,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2194 states, 2193 states have (on average 2.93296853625171) internal successors, (6432), 2193 states have internal predecessors, (6432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:37:51,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2194 states to 2194 states and 6432 transitions. [2021-07-13 19:37:51,511 INFO L78 Accepts]: Start accepts. Automaton has 2194 states and 6432 transitions. Word has length 19 [2021-07-13 19:37:51,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:37:51,511 INFO L482 AbstractCegarLoop]: Abstraction has 2194 states and 6432 transitions. [2021-07-13 19:37:51,511 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:37:51,511 INFO L276 IsEmpty]: Start isEmpty. Operand 2194 states and 6432 transitions. [2021-07-13 19:37:51,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:37:51,513 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:37:51,514 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:37:51,714 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3830,459 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:37:51,714 INFO L430 AbstractCegarLoop]: === Iteration 469 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:37:51,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:37:51,714 INFO L82 PathProgramCache]: Analyzing trace with hash 974084634, now seen corresponding path program 455 times [2021-07-13 19:37:51,714 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:37:51,714 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899791037] [2021-07-13 19:37:51,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:37:51,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:37:51,830 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:37:51,831 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:37:51,831 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899791037] [2021-07-13 19:37:51,831 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1899791037] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:37:51,831 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [621275460] [2021-07-13 19:37:51,831 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 460 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 460 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:37:51,860 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-13 19:37:51,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:37:51,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 19:37:51,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:37:52,003 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:37:52,003 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:37:52,004 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:37:52,005 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:37:52,007 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:37:52,007 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:37:52,007 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:37:52,008 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:37:52,010 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:37:52,010 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:37:52,011 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:37:52,011 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:37:52,013 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:37:52,014 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:37:52,024 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:37:52,057 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-07-13 19:37:52,057 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:37:52,058 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:37:52,058 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-07-13 19:37:52,115 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:37:52,115 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [621275460] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:37:52,115 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:37:52,115 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-07-13 19:37:52,115 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066823270] [2021-07-13 19:37:52,115 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:37:52,115 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:37:52,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:37:52,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=368, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:37:52,116 INFO L87 Difference]: Start difference. First operand 2194 states and 6432 transitions. Second operand has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:37:52,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:37:52,477 INFO L93 Difference]: Finished difference Result 2389 states and 6806 transitions. [2021-07-13 19:37:52,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:37:52,478 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:37:52,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:37:52,481 INFO L225 Difference]: With dead ends: 2389 [2021-07-13 19:37:52,481 INFO L226 Difference]: Without dead ends: 2389 [2021-07-13 19:37:52,481 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 328.5ms TimeCoverageRelationStatistics Valid=67, Invalid=485, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:37:52,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2389 states. [2021-07-13 19:37:52,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2389 to 2215. [2021-07-13 19:37:52,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2215 states, 2214 states have (on average 2.93676603432701) internal successors, (6502), 2214 states have internal predecessors, (6502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:37:52,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2215 states to 2215 states and 6502 transitions. [2021-07-13 19:37:52,508 INFO L78 Accepts]: Start accepts. Automaton has 2215 states and 6502 transitions. Word has length 19 [2021-07-13 19:37:52,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:37:52,508 INFO L482 AbstractCegarLoop]: Abstraction has 2215 states and 6502 transitions. [2021-07-13 19:37:52,508 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:37:52,508 INFO L276 IsEmpty]: Start isEmpty. Operand 2215 states and 6502 transitions. [2021-07-13 19:37:52,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:37:52,510 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:37:52,511 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:37:52,711 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3833,460 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:37:52,711 INFO L430 AbstractCegarLoop]: === Iteration 470 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:37:52,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:37:52,711 INFO L82 PathProgramCache]: Analyzing trace with hash 1775700862, now seen corresponding path program 456 times [2021-07-13 19:37:52,711 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:37:52,711 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73877904] [2021-07-13 19:37:52,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:37:52,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:37:52,826 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:37:52,826 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:37:52,826 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73877904] [2021-07-13 19:37:52,826 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [73877904] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:37:52,826 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1454152264] [2021-07-13 19:37:52,826 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 461 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 461 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:37:52,856 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-13 19:37:52,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:37:52,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 19:37:52,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:37:52,998 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:37:52,998 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:37:52,999 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:37:53,000 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:37:53,002 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:37:53,002 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:37:53,002 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:37:53,003 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:37:53,005 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:37:53,005 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:37:53,006 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:37:53,006 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:37:53,008 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:37:53,008 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:37:53,009 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:37:53,041 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-07-13 19:37:53,041 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:37:53,042 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:37:53,042 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-07-13 19:37:53,114 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:37:53,114 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1454152264] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:37:53,114 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:37:53,114 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-07-13 19:37:53,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456374303] [2021-07-13 19:37:53,114 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:37:53,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:37:53,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:37:53,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=368, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:37:53,115 INFO L87 Difference]: Start difference. First operand 2215 states and 6502 transitions. Second operand has 21 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:37:54,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:37:54,215 INFO L93 Difference]: Finished difference Result 2423 states and 6873 transitions. [2021-07-13 19:37:54,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-07-13 19:37:54,216 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:37:54,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:37:54,219 INFO L225 Difference]: With dead ends: 2423 [2021-07-13 19:37:54,219 INFO L226 Difference]: Without dead ends: 2411 [2021-07-13 19:37:54,220 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 484 ImplicationChecksByTransitivity, 897.4ms TimeCoverageRelationStatistics Valid=200, Invalid=1780, Unknown=0, NotChecked=0, Total=1980 [2021-07-13 19:37:54,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2411 states. [2021-07-13 19:37:54,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2411 to 2221. [2021-07-13 19:37:54,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2221 states, 2220 states have (on average 2.9364864864864866) internal successors, (6519), 2220 states have internal predecessors, (6519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:37:54,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2221 states to 2221 states and 6519 transitions. [2021-07-13 19:37:54,249 INFO L78 Accepts]: Start accepts. Automaton has 2221 states and 6519 transitions. Word has length 19 [2021-07-13 19:37:54,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:37:54,249 INFO L482 AbstractCegarLoop]: Abstraction has 2221 states and 6519 transitions. [2021-07-13 19:37:54,249 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:37:54,249 INFO L276 IsEmpty]: Start isEmpty. Operand 2221 states and 6519 transitions. [2021-07-13 19:37:54,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:37:54,251 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:37:54,251 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:37:54,452 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 461 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3837 [2021-07-13 19:37:54,452 INFO L430 AbstractCegarLoop]: === Iteration 471 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:37:54,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:37:54,452 INFO L82 PathProgramCache]: Analyzing trace with hash -800922728, now seen corresponding path program 457 times [2021-07-13 19:37:54,452 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:37:54,453 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761844289] [2021-07-13 19:37:54,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:37:54,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:37:54,577 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:37:54,578 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:37:54,578 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761844289] [2021-07-13 19:37:54,578 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1761844289] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:37:54,578 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1444493676] [2021-07-13 19:37:54,578 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 462 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 462 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:37:54,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:37:54,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 19:37:54,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:37:54,748 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:37:54,749 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:37:54,749 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:37:54,750 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:37:54,752 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:37:54,753 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:37:54,753 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:37:54,754 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:37:54,756 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:37:54,756 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:37:54,756 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:37:54,757 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:37:54,759 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:37:54,759 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:37:54,760 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:37:54,793 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-07-13 19:37:54,794 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:37:54,794 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:37:54,794 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-07-13 19:37:54,846 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:37:54,847 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1444493676] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:37:54,847 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:37:54,847 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-07-13 19:37:54,847 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550585783] [2021-07-13 19:37:54,847 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:37:54,847 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:37:54,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:37:54,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=368, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:37:54,847 INFO L87 Difference]: Start difference. First operand 2221 states and 6519 transitions. Second operand has 21 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:37:55,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:37:55,447 INFO L93 Difference]: Finished difference Result 2391 states and 6825 transitions. [2021-07-13 19:37:55,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-13 19:37:55,447 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:37:55,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:37:55,451 INFO L225 Difference]: With dead ends: 2391 [2021-07-13 19:37:55,451 INFO L226 Difference]: Without dead ends: 2391 [2021-07-13 19:37:55,451 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 555.4ms TimeCoverageRelationStatistics Valid=138, Invalid=984, Unknown=0, NotChecked=0, Total=1122 [2021-07-13 19:37:55,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2391 states. [2021-07-13 19:37:55,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2391 to 2207. [2021-07-13 19:37:55,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2207 states, 2206 states have (on average 2.931097008159565) internal successors, (6466), 2206 states have internal predecessors, (6466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:37:55,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2207 states to 2207 states and 6466 transitions. [2021-07-13 19:37:55,484 INFO L78 Accepts]: Start accepts. Automaton has 2207 states and 6466 transitions. Word has length 19 [2021-07-13 19:37:55,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:37:55,484 INFO L482 AbstractCegarLoop]: Abstraction has 2207 states and 6466 transitions. [2021-07-13 19:37:55,485 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:37:55,485 INFO L276 IsEmpty]: Start isEmpty. Operand 2207 states and 6466 transitions. [2021-07-13 19:37:55,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:37:55,487 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:37:55,487 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:37:55,687 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 462 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3842 [2021-07-13 19:37:55,687 INFO L430 AbstractCegarLoop]: === Iteration 472 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:37:55,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:37:55,688 INFO L82 PathProgramCache]: Analyzing trace with hash 1783431260, now seen corresponding path program 458 times [2021-07-13 19:37:55,688 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:37:55,688 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525375826] [2021-07-13 19:37:55,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:37:55,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:37:55,799 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:37:55,799 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:37:55,799 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525375826] [2021-07-13 19:37:55,799 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [525375826] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:37:55,799 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [658495934] [2021-07-13 19:37:55,800 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 463 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 463 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:37:55,827 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:37:55,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:37:55,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 19:37:55,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:37:55,997 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:37:55,998 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:37:55,998 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:37:55,999 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:37:56,001 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:37:56,001 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:37:56,002 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:37:56,024 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-07-13 19:37:56,024 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:37:56,025 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:37:56,025 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-07-13 19:37:56,047 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:37:56,047 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [658495934] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:37:56,047 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:37:56,047 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-07-13 19:37:56,047 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432617968] [2021-07-13 19:37:56,047 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:37:56,047 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:37:56,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:37:56,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=368, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:37:56,048 INFO L87 Difference]: Start difference. First operand 2207 states and 6466 transitions. Second operand has 21 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:37:56,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:37:56,973 INFO L93 Difference]: Finished difference Result 2494 states and 7014 transitions. [2021-07-13 19:37:56,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-07-13 19:37:56,973 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:37:56,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:37:56,977 INFO L225 Difference]: With dead ends: 2494 [2021-07-13 19:37:56,977 INFO L226 Difference]: Without dead ends: 2494 [2021-07-13 19:37:56,977 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 442 ImplicationChecksByTransitivity, 688.9ms TimeCoverageRelationStatistics Valid=209, Invalid=1683, Unknown=0, NotChecked=0, Total=1892 [2021-07-13 19:37:56,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2494 states. [2021-07-13 19:37:56,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2494 to 2205. [2021-07-13 19:37:57,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2205 states, 2204 states have (on average 2.9310344827586206) internal successors, (6460), 2204 states have internal predecessors, (6460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:37:57,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2205 states to 2205 states and 6460 transitions. [2021-07-13 19:37:57,004 INFO L78 Accepts]: Start accepts. Automaton has 2205 states and 6460 transitions. Word has length 19 [2021-07-13 19:37:57,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:37:57,004 INFO L482 AbstractCegarLoop]: Abstraction has 2205 states and 6460 transitions. [2021-07-13 19:37:57,004 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:37:57,004 INFO L276 IsEmpty]: Start isEmpty. Operand 2205 states and 6460 transitions. [2021-07-13 19:37:57,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:37:57,006 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:37:57,006 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:37:57,207 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3846,463 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:37:57,207 INFO L430 AbstractCegarLoop]: === Iteration 473 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:37:57,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:37:57,207 INFO L82 PathProgramCache]: Analyzing trace with hash 294026264, now seen corresponding path program 459 times [2021-07-13 19:37:57,207 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:37:57,207 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112459375] [2021-07-13 19:37:57,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:37:57,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:37:57,309 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:37:57,309 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:37:57,309 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112459375] [2021-07-13 19:37:57,309 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2112459375] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:37:57,309 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1959741582] [2021-07-13 19:37:57,310 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 464 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 464 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:37:57,338 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 19:37:57,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:37:57,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 19:37:57,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:37:57,507 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:37:57,507 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:37:57,508 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:37:57,508 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:37:57,511 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:37:57,511 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:37:57,511 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:37:57,533 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-07-13 19:37:57,533 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:37:57,534 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:37:57,534 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-07-13 19:37:57,556 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:37:57,556 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1959741582] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:37:57,556 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:37:57,557 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-07-13 19:37:57,557 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228057120] [2021-07-13 19:37:57,557 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:37:57,557 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:37:57,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:37:57,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=368, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:37:57,557 INFO L87 Difference]: Start difference. First operand 2205 states and 6460 transitions. Second operand has 21 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:37:59,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:37:59,148 INFO L93 Difference]: Finished difference Result 2625 states and 7276 transitions. [2021-07-13 19:37:59,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-07-13 19:37:59,148 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:37:59,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:37:59,152 INFO L225 Difference]: With dead ends: 2625 [2021-07-13 19:37:59,152 INFO L226 Difference]: Without dead ends: 2625 [2021-07-13 19:37:59,152 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1187 ImplicationChecksByTransitivity, 1231.6ms TimeCoverageRelationStatistics Valid=427, Invalid=3605, Unknown=0, NotChecked=0, Total=4032 [2021-07-13 19:37:59,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2625 states. [2021-07-13 19:37:59,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2625 to 2206. [2021-07-13 19:37:59,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2206 states, 2205 states have (on average 2.931065759637188) internal successors, (6463), 2205 states have internal predecessors, (6463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:37:59,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2206 states to 2206 states and 6463 transitions. [2021-07-13 19:37:59,179 INFO L78 Accepts]: Start accepts. Automaton has 2206 states and 6463 transitions. Word has length 19 [2021-07-13 19:37:59,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:37:59,180 INFO L482 AbstractCegarLoop]: Abstraction has 2206 states and 6463 transitions. [2021-07-13 19:37:59,180 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:37:59,180 INFO L276 IsEmpty]: Start isEmpty. Operand 2206 states and 6463 transitions. [2021-07-13 19:37:59,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:37:59,182 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:37:59,182 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:37:59,383 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 464 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3849 [2021-07-13 19:37:59,383 INFO L430 AbstractCegarLoop]: === Iteration 474 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:37:59,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:37:59,383 INFO L82 PathProgramCache]: Analyzing trace with hash 1367111644, now seen corresponding path program 460 times [2021-07-13 19:37:59,383 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:37:59,383 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719410207] [2021-07-13 19:37:59,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:37:59,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:37:59,485 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:37:59,485 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:37:59,485 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719410207] [2021-07-13 19:37:59,485 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [719410207] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:37:59,485 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1685300705] [2021-07-13 19:37:59,485 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 465 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 465 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:37:59,514 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:37:59,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:37:59,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 19:37:59,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:37:59,689 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:37:59,690 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:37:59,690 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:37:59,691 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:37:59,693 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:37:59,693 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:37:59,694 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:37:59,715 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-07-13 19:37:59,716 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:37:59,716 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:37:59,716 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-07-13 19:37:59,739 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:37:59,739 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1685300705] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:37:59,739 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:37:59,739 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-07-13 19:37:59,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588716512] [2021-07-13 19:37:59,739 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:37:59,739 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:37:59,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:37:59,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=370, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:37:59,740 INFO L87 Difference]: Start difference. First operand 2206 states and 6463 transitions. Second operand has 21 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:02,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:02,220 INFO L93 Difference]: Finished difference Result 2591 states and 7250 transitions. [2021-07-13 19:38:02,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2021-07-13 19:38:02,220 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:38:02,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:02,224 INFO L225 Difference]: With dead ends: 2591 [2021-07-13 19:38:02,224 INFO L226 Difference]: Without dead ends: 2591 [2021-07-13 19:38:02,224 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2258 ImplicationChecksByTransitivity, 2006.6ms TimeCoverageRelationStatistics Valid=748, Invalid=6392, Unknown=0, NotChecked=0, Total=7140 [2021-07-13 19:38:02,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2591 states. [2021-07-13 19:38:02,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2591 to 2208. [2021-07-13 19:38:02,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2208 states, 2207 states have (on average 2.931128228364295) internal successors, (6469), 2207 states have internal predecessors, (6469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:02,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2208 states to 2208 states and 6469 transitions. [2021-07-13 19:38:02,250 INFO L78 Accepts]: Start accepts. Automaton has 2208 states and 6469 transitions. Word has length 19 [2021-07-13 19:38:02,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:02,250 INFO L482 AbstractCegarLoop]: Abstraction has 2208 states and 6469 transitions. [2021-07-13 19:38:02,250 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:02,250 INFO L276 IsEmpty]: Start isEmpty. Operand 2208 states and 6469 transitions. [2021-07-13 19:38:02,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:38:02,253 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:02,253 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:02,453 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3852,465 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:38:02,453 INFO L430 AbstractCegarLoop]: === Iteration 475 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:02,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:02,454 INFO L82 PathProgramCache]: Analyzing trace with hash 273020056, now seen corresponding path program 461 times [2021-07-13 19:38:02,454 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:02,454 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624596523] [2021-07-13 19:38:02,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:02,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:02,556 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:02,556 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:02,557 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624596523] [2021-07-13 19:38:02,557 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [624596523] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:02,557 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1035880941] [2021-07-13 19:38:02,557 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 466 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 466 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:38:02,586 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:38:02,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:38:02,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 19:38:02,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:38:02,764 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:02,765 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:02,765 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:38:02,766 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:02,768 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:02,768 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:38:02,769 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:02,791 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-07-13 19:38:02,791 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:38:02,791 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:38:02,792 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-07-13 19:38:02,815 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:02,815 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1035880941] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:02,815 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:38:02,815 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-07-13 19:38:02,815 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943636201] [2021-07-13 19:38:02,815 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:38:02,815 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:02,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:38:02,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=372, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:38:02,816 INFO L87 Difference]: Start difference. First operand 2208 states and 6469 transitions. Second operand has 21 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:03,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:03,126 INFO L93 Difference]: Finished difference Result 2306 states and 6668 transitions. [2021-07-13 19:38:03,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 19:38:03,127 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:38:03,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:03,130 INFO L225 Difference]: With dead ends: 2306 [2021-07-13 19:38:03,130 INFO L226 Difference]: Without dead ends: 2306 [2021-07-13 19:38:03,130 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 244.6ms TimeCoverageRelationStatistics Valid=48, Invalid=372, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:38:03,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2306 states. [2021-07-13 19:38:03,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2306 to 2208. [2021-07-13 19:38:03,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2208 states, 2207 states have (on average 2.931128228364295) internal successors, (6469), 2207 states have internal predecessors, (6469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:03,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2208 states to 2208 states and 6469 transitions. [2021-07-13 19:38:03,159 INFO L78 Accepts]: Start accepts. Automaton has 2208 states and 6469 transitions. Word has length 19 [2021-07-13 19:38:03,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:03,159 INFO L482 AbstractCegarLoop]: Abstraction has 2208 states and 6469 transitions. [2021-07-13 19:38:03,159 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:03,159 INFO L276 IsEmpty]: Start isEmpty. Operand 2208 states and 6469 transitions. [2021-07-13 19:38:03,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:38:03,162 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:03,162 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:03,362 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3855,466 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:38:03,362 INFO L430 AbstractCegarLoop]: === Iteration 476 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:03,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:03,363 INFO L82 PathProgramCache]: Analyzing trace with hash -1211565410, now seen corresponding path program 462 times [2021-07-13 19:38:03,363 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:03,363 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224992377] [2021-07-13 19:38:03,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:03,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:03,481 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:03,481 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:03,481 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224992377] [2021-07-13 19:38:03,481 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [224992377] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:03,481 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1698824000] [2021-07-13 19:38:03,481 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 467 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 467 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:38:03,510 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-13 19:38:03,510 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:38:03,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 19:38:03,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:38:03,670 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:03,671 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:03,671 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:38:03,672 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:03,673 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:03,674 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:38:03,674 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:03,691 INFO L628 ElimStorePlain]: treesize reduction 30, result has 33.3 percent of original size [2021-07-13 19:38:03,692 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:38:03,692 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:38:03,692 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:59, output treesize:15 [2021-07-13 19:38:03,717 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:03,717 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1698824000] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:03,717 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:38:03,717 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-07-13 19:38:03,717 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177362811] [2021-07-13 19:38:03,717 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 19:38:03,717 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:03,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 19:38:03,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=406, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:38:03,717 INFO L87 Difference]: Start difference. First operand 2208 states and 6469 transitions. Second operand has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:04,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:04,129 INFO L93 Difference]: Finished difference Result 2441 states and 6959 transitions. [2021-07-13 19:38:04,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-13 19:38:04,129 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:38:04,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:04,133 INFO L225 Difference]: With dead ends: 2441 [2021-07-13 19:38:04,133 INFO L226 Difference]: Without dead ends: 2441 [2021-07-13 19:38:04,133 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 325.4ms TimeCoverageRelationStatistics Valid=80, Invalid=676, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:38:04,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2441 states. [2021-07-13 19:38:04,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2441 to 2268. [2021-07-13 19:38:04,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2268 states, 2267 states have (on average 2.941773268636965) internal successors, (6669), 2267 states have internal predecessors, (6669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:04,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2268 states to 2268 states and 6669 transitions. [2021-07-13 19:38:04,163 INFO L78 Accepts]: Start accepts. Automaton has 2268 states and 6669 transitions. Word has length 19 [2021-07-13 19:38:04,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:04,163 INFO L482 AbstractCegarLoop]: Abstraction has 2268 states and 6669 transitions. [2021-07-13 19:38:04,163 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:04,163 INFO L276 IsEmpty]: Start isEmpty. Operand 2268 states and 6669 transitions. [2021-07-13 19:38:04,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:38:04,165 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:04,166 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:04,366 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3858,467 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:38:04,366 INFO L430 AbstractCegarLoop]: === Iteration 477 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:04,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:04,366 INFO L82 PathProgramCache]: Analyzing trace with hash -280682822, now seen corresponding path program 463 times [2021-07-13 19:38:04,366 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:04,367 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819810196] [2021-07-13 19:38:04,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:04,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:04,466 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:04,466 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:04,466 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819810196] [2021-07-13 19:38:04,466 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1819810196] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:04,467 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1725430506] [2021-07-13 19:38:04,467 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 468 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 468 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:38:04,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:04,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 19:38:04,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:38:04,684 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:04,689 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:04,689 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:38:04,690 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:04,692 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:04,693 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:04,693 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:38:04,694 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:04,695 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:38:04,696 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:04,698 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:38:04,699 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:04,701 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:38:04,701 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:04,703 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:38:04,704 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:04,730 INFO L628 ElimStorePlain]: treesize reduction 21, result has 58.0 percent of original size [2021-07-13 19:38:04,731 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:38:04,731 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:38:04,731 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 2 variables, input treesize:125, output treesize:29 [2021-07-13 19:38:04,765 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:04,765 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1725430506] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:04,765 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:38:04,765 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-07-13 19:38:04,765 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252770622] [2021-07-13 19:38:04,765 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 19:38:04,765 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:04,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 19:38:04,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=406, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:38:04,766 INFO L87 Difference]: Start difference. First operand 2268 states and 6669 transitions. Second operand has 22 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 22 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:05,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:05,445 INFO L93 Difference]: Finished difference Result 2383 states and 6831 transitions. [2021-07-13 19:38:05,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-13 19:38:05,445 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 22 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:38:05,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:05,448 INFO L225 Difference]: With dead ends: 2383 [2021-07-13 19:38:05,449 INFO L226 Difference]: Without dead ends: 2375 [2021-07-13 19:38:05,449 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 332 ImplicationChecksByTransitivity, 545.7ms TimeCoverageRelationStatistics Valid=143, Invalid=1417, Unknown=0, NotChecked=0, Total=1560 [2021-07-13 19:38:05,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2375 states. [2021-07-13 19:38:05,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2375 to 2275. [2021-07-13 19:38:05,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2275 states, 2274 states have (on average 2.936675461741425) internal successors, (6678), 2274 states have internal predecessors, (6678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:05,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2275 states to 2275 states and 6678 transitions. [2021-07-13 19:38:05,477 INFO L78 Accepts]: Start accepts. Automaton has 2275 states and 6678 transitions. Word has length 19 [2021-07-13 19:38:05,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:05,477 INFO L482 AbstractCegarLoop]: Abstraction has 2275 states and 6678 transitions. [2021-07-13 19:38:05,477 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 22 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:05,477 INFO L276 IsEmpty]: Start isEmpty. Operand 2275 states and 6678 transitions. [2021-07-13 19:38:05,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:38:05,480 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:05,480 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:05,680 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3860,468 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:38:05,680 INFO L430 AbstractCegarLoop]: === Iteration 478 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:05,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:05,681 INFO L82 PathProgramCache]: Analyzing trace with hash 1922379772, now seen corresponding path program 464 times [2021-07-13 19:38:05,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:05,681 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324330739] [2021-07-13 19:38:05,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:05,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:05,780 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:05,780 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:05,780 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324330739] [2021-07-13 19:38:05,780 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1324330739] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:05,780 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1621392581] [2021-07-13 19:38:05,780 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 469 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 469 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:38:05,809 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:38:05,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:38:05,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 19:38:05,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:38:05,984 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:05,984 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:05,984 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:38:05,985 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:05,987 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:05,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:38:05,988 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:06,005 INFO L628 ElimStorePlain]: treesize reduction 30, result has 33.3 percent of original size [2021-07-13 19:38:06,005 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:38:06,006 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:38:06,006 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:59, output treesize:15 [2021-07-13 19:38:06,030 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:06,030 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1621392581] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:06,030 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:38:06,031 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-07-13 19:38:06,031 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270178706] [2021-07-13 19:38:06,031 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 19:38:06,031 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:06,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 19:38:06,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=406, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:38:06,031 INFO L87 Difference]: Start difference. First operand 2275 states and 6678 transitions. Second operand has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:07,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:07,460 INFO L93 Difference]: Finished difference Result 2619 states and 7342 transitions. [2021-07-13 19:38:07,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-07-13 19:38:07,460 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:38:07,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:07,464 INFO L225 Difference]: With dead ends: 2619 [2021-07-13 19:38:07,464 INFO L226 Difference]: Without dead ends: 2616 [2021-07-13 19:38:07,465 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1021 ImplicationChecksByTransitivity, 1202.8ms TimeCoverageRelationStatistics Valid=364, Invalid=3296, Unknown=0, NotChecked=0, Total=3660 [2021-07-13 19:38:07,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2616 states. [2021-07-13 19:38:07,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2616 to 2292. [2021-07-13 19:38:07,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2292 states, 2291 states have (on average 2.939764295067656) internal successors, (6735), 2291 states have internal predecessors, (6735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:07,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2292 states to 2292 states and 6735 transitions. [2021-07-13 19:38:07,504 INFO L78 Accepts]: Start accepts. Automaton has 2292 states and 6735 transitions. Word has length 19 [2021-07-13 19:38:07,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:07,504 INFO L482 AbstractCegarLoop]: Abstraction has 2292 states and 6735 transitions. [2021-07-13 19:38:07,504 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:07,505 INFO L276 IsEmpty]: Start isEmpty. Operand 2292 states and 6735 transitions. [2021-07-13 19:38:07,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:38:07,507 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:07,507 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:07,707 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3865,469 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:38:07,707 INFO L430 AbstractCegarLoop]: === Iteration 479 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:07,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:07,708 INFO L82 PathProgramCache]: Analyzing trace with hash -818538400, now seen corresponding path program 465 times [2021-07-13 19:38:07,708 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:07,708 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165779425] [2021-07-13 19:38:07,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:07,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:07,818 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:07,818 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:07,818 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165779425] [2021-07-13 19:38:07,818 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [165779425] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:07,818 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [720289980] [2021-07-13 19:38:07,818 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 470 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 470 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:38:07,847 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 19:38:07,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:38:07,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 19:38:07,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:38:08,018 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:08,019 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:08,019 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:38:08,020 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:08,022 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:08,022 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:08,022 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:38:08,023 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:08,025 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:38:08,025 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:08,027 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:38:08,028 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:08,030 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:38:08,031 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:08,032 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:38:08,033 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:08,060 INFO L628 ElimStorePlain]: treesize reduction 21, result has 58.0 percent of original size [2021-07-13 19:38:08,060 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:38:08,060 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:38:08,060 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 2 variables, input treesize:125, output treesize:29 [2021-07-13 19:38:08,094 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:08,094 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [720289980] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:08,094 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:38:08,094 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-07-13 19:38:08,094 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916102427] [2021-07-13 19:38:08,094 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 19:38:08,094 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:08,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 19:38:08,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=406, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:38:08,095 INFO L87 Difference]: Start difference. First operand 2292 states and 6735 transitions. Second operand has 22 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 22 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:08,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:08,926 INFO L93 Difference]: Finished difference Result 2421 states and 6932 transitions. [2021-07-13 19:38:08,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-07-13 19:38:08,927 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 22 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:38:08,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:08,930 INFO L225 Difference]: With dead ends: 2421 [2021-07-13 19:38:08,930 INFO L226 Difference]: Without dead ends: 2415 [2021-07-13 19:38:08,930 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 516 ImplicationChecksByTransitivity, 753.5ms TimeCoverageRelationStatistics Valid=206, Invalid=1956, Unknown=0, NotChecked=0, Total=2162 [2021-07-13 19:38:08,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2415 states. [2021-07-13 19:38:08,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2415 to 2298. [2021-07-13 19:38:08,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2298 states, 2297 states have (on average 2.936003482803657) internal successors, (6744), 2297 states have internal predecessors, (6744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:08,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2298 states to 2298 states and 6744 transitions. [2021-07-13 19:38:08,955 INFO L78 Accepts]: Start accepts. Automaton has 2298 states and 6744 transitions. Word has length 19 [2021-07-13 19:38:08,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:08,955 INFO L482 AbstractCegarLoop]: Abstraction has 2298 states and 6744 transitions. [2021-07-13 19:38:08,955 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 22 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:08,955 INFO L276 IsEmpty]: Start isEmpty. Operand 2298 states and 6744 transitions. [2021-07-13 19:38:08,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:38:08,958 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:08,958 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:09,158 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3867,470 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:38:09,158 INFO L430 AbstractCegarLoop]: === Iteration 480 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:09,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:09,158 INFO L82 PathProgramCache]: Analyzing trace with hash -2132945186, now seen corresponding path program 466 times [2021-07-13 19:38:09,158 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:09,158 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933516567] [2021-07-13 19:38:09,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:09,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:09,258 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:09,259 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:09,259 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933516567] [2021-07-13 19:38:09,259 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [933516567] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:09,259 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [723755513] [2021-07-13 19:38:09,259 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 471 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 471 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:38:09,288 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:38:09,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:38:09,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 19:38:09,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:38:09,458 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:09,458 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:09,459 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:38:09,459 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:09,461 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:09,461 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:38:09,462 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:09,479 INFO L628 ElimStorePlain]: treesize reduction 30, result has 33.3 percent of original size [2021-07-13 19:38:09,479 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:38:09,480 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:38:09,480 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:59, output treesize:15 [2021-07-13 19:38:09,504 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:09,504 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [723755513] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:09,505 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:38:09,505 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-07-13 19:38:09,505 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993299994] [2021-07-13 19:38:09,505 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 19:38:09,505 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:09,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 19:38:09,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=405, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:38:09,505 INFO L87 Difference]: Start difference. First operand 2298 states and 6744 transitions. Second operand has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:10,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:10,780 INFO L93 Difference]: Finished difference Result 2660 states and 7469 transitions. [2021-07-13 19:38:10,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-07-13 19:38:10,781 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:38:10,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:10,785 INFO L225 Difference]: With dead ends: 2660 [2021-07-13 19:38:10,785 INFO L226 Difference]: Without dead ends: 2657 [2021-07-13 19:38:10,785 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 830 ImplicationChecksByTransitivity, 1016.0ms TimeCoverageRelationStatistics Valid=305, Invalid=2775, Unknown=0, NotChecked=0, Total=3080 [2021-07-13 19:38:10,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2657 states. [2021-07-13 19:38:10,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2657 to 2336. [2021-07-13 19:38:10,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2336 states, 2335 states have (on average 2.9413276231263383) internal successors, (6868), 2335 states have internal predecessors, (6868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:10,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2336 states to 2336 states and 6868 transitions. [2021-07-13 19:38:10,815 INFO L78 Accepts]: Start accepts. Automaton has 2336 states and 6868 transitions. Word has length 19 [2021-07-13 19:38:10,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:10,815 INFO L482 AbstractCegarLoop]: Abstraction has 2336 states and 6868 transitions. [2021-07-13 19:38:10,815 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:10,815 INFO L276 IsEmpty]: Start isEmpty. Operand 2336 states and 6868 transitions. [2021-07-13 19:38:10,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:38:10,818 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:10,818 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:11,018 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3872,471 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:38:11,018 INFO L430 AbstractCegarLoop]: === Iteration 481 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:11,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:11,019 INFO L82 PathProgramCache]: Analyzing trace with hash 1242321402, now seen corresponding path program 467 times [2021-07-13 19:38:11,019 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:11,019 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936649452] [2021-07-13 19:38:11,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:11,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:11,129 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:11,129 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:11,129 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936649452] [2021-07-13 19:38:11,129 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1936649452] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:11,129 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1334516977] [2021-07-13 19:38:11,129 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 472 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 472 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:38:11,159 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:38:11,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:38:11,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 19:38:11,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:38:11,345 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:11,346 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:11,346 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:38:11,347 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:11,349 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:11,350 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:11,350 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:38:11,350 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:11,352 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:38:11,353 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:11,355 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:38:11,356 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:11,365 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:38:11,366 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:11,367 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:38:11,368 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:11,395 INFO L628 ElimStorePlain]: treesize reduction 21, result has 58.0 percent of original size [2021-07-13 19:38:11,395 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:38:11,396 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:38:11,396 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 2 variables, input treesize:125, output treesize:29 [2021-07-13 19:38:11,430 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:11,430 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1334516977] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:11,430 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:38:11,430 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-07-13 19:38:11,430 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477431845] [2021-07-13 19:38:11,430 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 19:38:11,430 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:11,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 19:38:11,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=405, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:38:11,431 INFO L87 Difference]: Start difference. First operand 2336 states and 6868 transitions. Second operand has 22 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 22 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:12,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:12,285 INFO L93 Difference]: Finished difference Result 2433 states and 7025 transitions. [2021-07-13 19:38:12,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-07-13 19:38:12,286 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 22 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:38:12,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:12,289 INFO L225 Difference]: With dead ends: 2433 [2021-07-13 19:38:12,289 INFO L226 Difference]: Without dead ends: 2429 [2021-07-13 19:38:12,289 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 430 ImplicationChecksByTransitivity, 769.9ms TimeCoverageRelationStatistics Valid=195, Invalid=1697, Unknown=0, NotChecked=0, Total=1892 [2021-07-13 19:38:12,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2429 states. [2021-07-13 19:38:12,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2429 to 2339. [2021-07-13 19:38:12,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2339 states, 2338 states have (on average 2.9345594525235246) internal successors, (6861), 2338 states have internal predecessors, (6861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:12,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2339 states to 2339 states and 6861 transitions. [2021-07-13 19:38:12,324 INFO L78 Accepts]: Start accepts. Automaton has 2339 states and 6861 transitions. Word has length 19 [2021-07-13 19:38:12,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:12,324 INFO L482 AbstractCegarLoop]: Abstraction has 2339 states and 6861 transitions. [2021-07-13 19:38:12,324 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 22 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:12,324 INFO L276 IsEmpty]: Start isEmpty. Operand 2339 states and 6861 transitions. [2021-07-13 19:38:12,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:38:12,326 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:12,327 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:12,527 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3874,472 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:38:12,527 INFO L430 AbstractCegarLoop]: === Iteration 482 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:12,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:12,527 INFO L82 PathProgramCache]: Analyzing trace with hash -2125214788, now seen corresponding path program 468 times [2021-07-13 19:38:12,527 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:12,528 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848849798] [2021-07-13 19:38:12,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:12,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:12,643 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:12,643 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:12,643 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848849798] [2021-07-13 19:38:12,643 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [848849798] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:12,643 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [970230762] [2021-07-13 19:38:12,643 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 473 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 473 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:38:12,674 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-13 19:38:12,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:38:12,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 19:38:12,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:38:12,827 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:12,827 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:12,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:38:12,829 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:12,831 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:12,831 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:12,831 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:38:12,832 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:12,834 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:12,835 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:12,835 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:38:12,835 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:12,837 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:12,838 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:38:12,838 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:12,871 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-07-13 19:38:12,871 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:38:12,872 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:38:12,872 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-07-13 19:38:12,929 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:12,930 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [970230762] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:12,930 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:38:12,930 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-07-13 19:38:12,930 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518058669] [2021-07-13 19:38:12,930 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 19:38:12,930 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:12,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 19:38:12,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:38:12,930 INFO L87 Difference]: Start difference. First operand 2339 states and 6861 transitions. Second operand has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:13,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:13,912 INFO L93 Difference]: Finished difference Result 2643 states and 7373 transitions. [2021-07-13 19:38:13,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-07-13 19:38:13,912 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:38:13,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:13,915 INFO L225 Difference]: With dead ends: 2643 [2021-07-13 19:38:13,916 INFO L226 Difference]: Without dead ends: 2641 [2021-07-13 19:38:13,916 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 456 ImplicationChecksByTransitivity, 828.4ms TimeCoverageRelationStatistics Valid=225, Invalid=1755, Unknown=0, NotChecked=0, Total=1980 [2021-07-13 19:38:13,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2641 states. [2021-07-13 19:38:13,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2641 to 2285. [2021-07-13 19:38:13,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2285 states, 2284 states have (on average 2.9229422066549913) internal successors, (6676), 2284 states have internal predecessors, (6676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:13,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2285 states to 2285 states and 6676 transitions. [2021-07-13 19:38:13,944 INFO L78 Accepts]: Start accepts. Automaton has 2285 states and 6676 transitions. Word has length 19 [2021-07-13 19:38:13,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:13,944 INFO L482 AbstractCegarLoop]: Abstraction has 2285 states and 6676 transitions. [2021-07-13 19:38:13,944 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:13,944 INFO L276 IsEmpty]: Start isEmpty. Operand 2285 states and 6676 transitions. [2021-07-13 19:38:13,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:38:13,947 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:13,947 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:14,147 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3879,473 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:38:14,147 INFO L430 AbstractCegarLoop]: === Iteration 483 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:14,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:14,147 INFO L82 PathProgramCache]: Analyzing trace with hash -1323598560, now seen corresponding path program 469 times [2021-07-13 19:38:14,147 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:14,147 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759584720] [2021-07-13 19:38:14,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:14,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:14,260 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:14,260 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:14,260 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759584720] [2021-07-13 19:38:14,260 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1759584720] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:14,261 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1397507906] [2021-07-13 19:38:14,261 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 474 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 474 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:38:14,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:14,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 19:38:14,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:38:14,442 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:14,443 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:14,443 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:38:14,444 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:14,446 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:14,446 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:14,447 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:38:14,447 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:14,449 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:14,450 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:14,450 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:38:14,451 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:14,453 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:14,453 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:38:14,453 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:14,486 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-07-13 19:38:14,486 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:38:14,487 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:38:14,487 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-07-13 19:38:14,566 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:14,566 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1397507906] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:14,566 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:38:14,566 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-07-13 19:38:14,566 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65435316] [2021-07-13 19:38:14,567 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 19:38:14,567 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:14,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 19:38:14,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:38:14,567 INFO L87 Difference]: Start difference. First operand 2285 states and 6676 transitions. Second operand has 22 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 22 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:15,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:15,636 INFO L93 Difference]: Finished difference Result 2491 states and 7057 transitions. [2021-07-13 19:38:15,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-07-13 19:38:15,637 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 22 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:38:15,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:15,640 INFO L225 Difference]: With dead ends: 2491 [2021-07-13 19:38:15,640 INFO L226 Difference]: Without dead ends: 2487 [2021-07-13 19:38:15,641 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 587 ImplicationChecksByTransitivity, 946.1ms TimeCoverageRelationStatistics Valid=250, Invalid=2102, Unknown=0, NotChecked=0, Total=2352 [2021-07-13 19:38:15,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2487 states. [2021-07-13 19:38:15,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2487 to 2293. [2021-07-13 19:38:15,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2293 states, 2292 states have (on average 2.9210296684118675) internal successors, (6695), 2292 states have internal predecessors, (6695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:15,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2293 states to 2293 states and 6695 transitions. [2021-07-13 19:38:15,672 INFO L78 Accepts]: Start accepts. Automaton has 2293 states and 6695 transitions. Word has length 19 [2021-07-13 19:38:15,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:15,672 INFO L482 AbstractCegarLoop]: Abstraction has 2293 states and 6695 transitions. [2021-07-13 19:38:15,672 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 22 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:15,672 INFO L276 IsEmpty]: Start isEmpty. Operand 2293 states and 6695 transitions. [2021-07-13 19:38:15,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:38:15,675 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:15,675 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:15,875 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3883,474 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:38:15,875 INFO L430 AbstractCegarLoop]: === Iteration 484 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:15,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:15,876 INFO L82 PathProgramCache]: Analyzing trace with hash 394745146, now seen corresponding path program 470 times [2021-07-13 19:38:15,876 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:15,876 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583041390] [2021-07-13 19:38:15,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:15,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:16,003 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:16,004 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:16,004 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583041390] [2021-07-13 19:38:16,004 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1583041390] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:16,004 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1426301653] [2021-07-13 19:38:16,004 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 475 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 475 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:38:16,032 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:38:16,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:38:16,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 19:38:16,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:38:16,189 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:16,190 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:16,190 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:38:16,191 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:16,193 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:16,194 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:16,194 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:38:16,195 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:16,197 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:16,197 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:16,197 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:38:16,198 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:16,200 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:16,200 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:38:16,201 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:16,234 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-07-13 19:38:16,234 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:38:16,235 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:38:16,235 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-07-13 19:38:16,289 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:16,289 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1426301653] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:16,289 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:38:16,289 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-07-13 19:38:16,289 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114861504] [2021-07-13 19:38:16,289 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 19:38:16,289 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:16,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 19:38:16,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:38:16,290 INFO L87 Difference]: Start difference. First operand 2293 states and 6695 transitions. Second operand has 22 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 22 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:17,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:17,005 INFO L93 Difference]: Finished difference Result 2462 states and 7000 transitions. [2021-07-13 19:38:17,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-13 19:38:17,006 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 22 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:38:17,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:17,009 INFO L225 Difference]: With dead ends: 2462 [2021-07-13 19:38:17,009 INFO L226 Difference]: Without dead ends: 2462 [2021-07-13 19:38:17,009 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 686.0ms TimeCoverageRelationStatistics Valid=186, Invalid=1296, Unknown=0, NotChecked=0, Total=1482 [2021-07-13 19:38:17,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2462 states. [2021-07-13 19:38:17,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2462 to 2226. [2021-07-13 19:38:17,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2226 states, 2225 states have (on average 2.9087640449438203) internal successors, (6472), 2225 states have internal predecessors, (6472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:17,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2226 states to 2226 states and 6472 transitions. [2021-07-13 19:38:17,044 INFO L78 Accepts]: Start accepts. Automaton has 2226 states and 6472 transitions. Word has length 19 [2021-07-13 19:38:17,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:17,044 INFO L482 AbstractCegarLoop]: Abstraction has 2226 states and 6472 transitions. [2021-07-13 19:38:17,044 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 22 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:17,044 INFO L276 IsEmpty]: Start isEmpty. Operand 2226 states and 6472 transitions. [2021-07-13 19:38:17,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:38:17,046 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:17,046 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:17,246 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3888,475 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:38:17,247 INFO L430 AbstractCegarLoop]: === Iteration 485 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:17,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:17,247 INFO L82 PathProgramCache]: Analyzing trace with hash -1611785190, now seen corresponding path program 471 times [2021-07-13 19:38:17,247 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:17,247 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377966894] [2021-07-13 19:38:17,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:17,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:17,340 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:38:17,340 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:17,340 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377966894] [2021-07-13 19:38:17,340 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [377966894] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:17,340 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [988783622] [2021-07-13 19:38:17,341 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 476 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 476 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:38:17,370 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 19:38:17,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:38:17,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 19:38:17,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:38:17,506 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:17,507 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:17,507 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:38:17,508 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:17,510 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:17,511 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:17,511 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:38:17,511 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:17,514 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:17,514 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:17,514 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:38:17,515 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:17,517 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:17,517 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:38:17,518 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:17,550 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-07-13 19:38:17,551 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:38:17,551 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:38:17,551 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-07-13 19:38:17,618 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:17,618 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [988783622] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:17,618 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:38:17,618 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 21 [2021-07-13 19:38:17,618 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891300693] [2021-07-13 19:38:17,619 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:38:17,619 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:17,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:38:17,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:38:17,619 INFO L87 Difference]: Start difference. First operand 2226 states and 6472 transitions. Second operand has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:18,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:18,624 INFO L93 Difference]: Finished difference Result 2355 states and 6707 transitions. [2021-07-13 19:38:18,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-07-13 19:38:18,624 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:38:18,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:18,628 INFO L225 Difference]: With dead ends: 2355 [2021-07-13 19:38:18,628 INFO L226 Difference]: Without dead ends: 2351 [2021-07-13 19:38:18,628 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 642 ImplicationChecksByTransitivity, 839.4ms TimeCoverageRelationStatistics Valid=248, Invalid=2202, Unknown=0, NotChecked=0, Total=2450 [2021-07-13 19:38:18,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2351 states. [2021-07-13 19:38:18,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2351 to 2231. [2021-07-13 19:38:18,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2231 states, 2230 states have (on average 2.907174887892377) internal successors, (6483), 2230 states have internal predecessors, (6483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:18,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2231 states to 2231 states and 6483 transitions. [2021-07-13 19:38:18,655 INFO L78 Accepts]: Start accepts. Automaton has 2231 states and 6483 transitions. Word has length 19 [2021-07-13 19:38:18,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:18,655 INFO L482 AbstractCegarLoop]: Abstraction has 2231 states and 6483 transitions. [2021-07-13 19:38:18,655 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:18,655 INFO L276 IsEmpty]: Start isEmpty. Operand 2231 states and 6483 transitions. [2021-07-13 19:38:18,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:38:18,658 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:18,658 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:18,859 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 476 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3892 [2021-07-13 19:38:18,859 INFO L430 AbstractCegarLoop]: === Iteration 486 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:18,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:18,859 INFO L82 PathProgramCache]: Analyzing trace with hash 659341304, now seen corresponding path program 472 times [2021-07-13 19:38:18,859 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:18,859 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765349703] [2021-07-13 19:38:18,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:18,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:18,947 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:18,947 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:18,947 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765349703] [2021-07-13 19:38:18,947 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [765349703] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:18,947 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1119540628] [2021-07-13 19:38:18,947 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 477 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 477 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:38:18,975 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:38:18,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:38:18,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 19:38:18,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:38:19,096 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:19,097 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:19,097 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:38:19,098 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:19,100 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:19,100 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:19,101 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:38:19,101 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:19,103 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:19,104 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:19,104 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:38:19,105 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:19,107 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:19,107 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:38:19,107 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:19,140 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-07-13 19:38:19,140 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:38:19,140 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:38:19,141 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-07-13 19:38:19,193 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:19,193 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1119540628] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:19,193 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:38:19,193 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 20 [2021-07-13 19:38:19,193 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403843731] [2021-07-13 19:38:19,193 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 19:38:19,193 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:19,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 19:38:19,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:38:19,193 INFO L87 Difference]: Start difference. First operand 2231 states and 6483 transitions. Second operand has 20 states, 20 states have (on average 1.5) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:19,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:19,809 INFO L93 Difference]: Finished difference Result 2378 states and 6711 transitions. [2021-07-13 19:38:19,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-13 19:38:19,809 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.5) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:38:19,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:19,813 INFO L225 Difference]: With dead ends: 2378 [2021-07-13 19:38:19,813 INFO L226 Difference]: Without dead ends: 2377 [2021-07-13 19:38:19,813 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 515.4ms TimeCoverageRelationStatistics Valid=163, Invalid=1097, Unknown=0, NotChecked=0, Total=1260 [2021-07-13 19:38:19,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2377 states. [2021-07-13 19:38:19,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2377 to 2202. [2021-07-13 19:38:19,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2202 states, 2201 states have (on average 2.9000454338936845) internal successors, (6383), 2201 states have internal predecessors, (6383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:19,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2202 states to 2202 states and 6383 transitions. [2021-07-13 19:38:19,841 INFO L78 Accepts]: Start accepts. Automaton has 2202 states and 6383 transitions. Word has length 19 [2021-07-13 19:38:19,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:19,841 INFO L482 AbstractCegarLoop]: Abstraction has 2202 states and 6383 transitions. [2021-07-13 19:38:19,841 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.5) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:19,842 INFO L276 IsEmpty]: Start isEmpty. Operand 2202 states and 6383 transitions. [2021-07-13 19:38:19,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:38:19,844 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:19,844 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:20,044 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3898,477 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:38:20,044 INFO L430 AbstractCegarLoop]: === Iteration 487 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:20,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:20,045 INFO L82 PathProgramCache]: Analyzing trace with hash 1460957532, now seen corresponding path program 473 times [2021-07-13 19:38:20,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:20,045 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818028361] [2021-07-13 19:38:20,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:20,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:20,129 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:20,129 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:20,130 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818028361] [2021-07-13 19:38:20,130 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1818028361] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:20,130 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [219869800] [2021-07-13 19:38:20,130 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 478 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 478 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:38:20,158 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-13 19:38:20,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:38:20,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 19:38:20,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:38:20,277 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:20,277 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:20,277 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:38:20,278 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:20,280 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:20,281 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:20,281 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:38:20,282 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:20,284 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:20,284 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:20,284 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:38:20,285 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:20,287 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:20,287 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:38:20,288 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:20,320 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-07-13 19:38:20,320 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:38:20,321 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:38:20,321 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-07-13 19:38:20,391 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:20,391 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [219869800] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:20,391 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:38:20,392 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 20 [2021-07-13 19:38:20,392 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791930435] [2021-07-13 19:38:20,392 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 19:38:20,392 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:20,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 19:38:20,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:38:20,392 INFO L87 Difference]: Start difference. First operand 2202 states and 6383 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:21,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:21,010 INFO L93 Difference]: Finished difference Result 2334 states and 6632 transitions. [2021-07-13 19:38:21,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-13 19:38:21,010 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:38:21,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:21,014 INFO L225 Difference]: With dead ends: 2334 [2021-07-13 19:38:21,014 INFO L226 Difference]: Without dead ends: 2328 [2021-07-13 19:38:21,014 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 566.2ms TimeCoverageRelationStatistics Valid=160, Invalid=1172, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 19:38:21,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2328 states. [2021-07-13 19:38:21,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2328 to 2212. [2021-07-13 19:38:21,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2212 states, 2211 states have (on average 2.895974672094075) internal successors, (6403), 2211 states have internal predecessors, (6403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:21,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2212 states to 2212 states and 6403 transitions. [2021-07-13 19:38:21,038 INFO L78 Accepts]: Start accepts. Automaton has 2212 states and 6403 transitions. Word has length 19 [2021-07-13 19:38:21,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:21,038 INFO L482 AbstractCegarLoop]: Abstraction has 2212 states and 6403 transitions. [2021-07-13 19:38:21,038 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:21,038 INFO L276 IsEmpty]: Start isEmpty. Operand 2212 states and 6403 transitions. [2021-07-13 19:38:21,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:38:21,041 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:21,041 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:21,241 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 478 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3902 [2021-07-13 19:38:21,241 INFO L430 AbstractCegarLoop]: === Iteration 488 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:21,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:21,241 INFO L82 PathProgramCache]: Analyzing trace with hash -1115666058, now seen corresponding path program 474 times [2021-07-13 19:38:21,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:21,242 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378220028] [2021-07-13 19:38:21,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:21,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:21,331 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:21,331 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:21,331 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378220028] [2021-07-13 19:38:21,331 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1378220028] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:21,331 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1107717383] [2021-07-13 19:38:21,332 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 479 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 479 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:38:21,362 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-13 19:38:21,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:38:21,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 19:38:21,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:38:21,486 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:21,487 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:21,487 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:38:21,488 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:21,490 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:21,491 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:21,491 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:38:21,492 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:21,494 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:21,494 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:21,495 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:38:21,495 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:21,497 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:21,498 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:38:21,498 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:21,531 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-07-13 19:38:21,531 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:38:21,532 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:38:21,532 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-07-13 19:38:21,581 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:21,581 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1107717383] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:21,581 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:38:21,581 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 20 [2021-07-13 19:38:21,581 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591141364] [2021-07-13 19:38:21,582 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 19:38:21,582 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:21,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 19:38:21,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:38:21,582 INFO L87 Difference]: Start difference. First operand 2212 states and 6403 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:22,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:22,021 INFO L93 Difference]: Finished difference Result 2328 states and 6621 transitions. [2021-07-13 19:38:22,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 19:38:22,021 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:38:22,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:22,024 INFO L225 Difference]: With dead ends: 2328 [2021-07-13 19:38:22,024 INFO L226 Difference]: Without dead ends: 2328 [2021-07-13 19:38:22,024 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 419.7ms TimeCoverageRelationStatistics Valid=123, Invalid=807, Unknown=0, NotChecked=0, Total=930 [2021-07-13 19:38:22,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2328 states. [2021-07-13 19:38:22,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2328 to 2205. [2021-07-13 19:38:22,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2205 states, 2204 states have (on average 2.8924682395644283) internal successors, (6375), 2204 states have internal predecessors, (6375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:22,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2205 states to 2205 states and 6375 transitions. [2021-07-13 19:38:22,051 INFO L78 Accepts]: Start accepts. Automaton has 2205 states and 6375 transitions. Word has length 19 [2021-07-13 19:38:22,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:22,051 INFO L482 AbstractCegarLoop]: Abstraction has 2205 states and 6375 transitions. [2021-07-13 19:38:22,051 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:22,051 INFO L276 IsEmpty]: Start isEmpty. Operand 2205 states and 6375 transitions. [2021-07-13 19:38:22,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:38:22,053 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:22,053 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:22,253 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 479 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3907 [2021-07-13 19:38:22,254 INFO L430 AbstractCegarLoop]: === Iteration 489 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:22,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:22,254 INFO L82 PathProgramCache]: Analyzing trace with hash 1468687930, now seen corresponding path program 475 times [2021-07-13 19:38:22,254 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:22,254 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318653347] [2021-07-13 19:38:22,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:22,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:22,337 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:22,337 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:22,337 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318653347] [2021-07-13 19:38:22,337 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [318653347] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:22,337 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [143110169] [2021-07-13 19:38:22,337 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 480 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 480 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:38:22,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:22,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 19:38:22,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:38:22,523 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:22,523 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:22,524 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:38:22,524 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:22,527 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:22,527 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:38:22,528 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:22,551 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-07-13 19:38:22,551 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:38:22,552 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:38:22,552 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-07-13 19:38:22,573 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:22,573 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [143110169] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:22,573 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:38:22,573 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 20 [2021-07-13 19:38:22,573 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622998211] [2021-07-13 19:38:22,574 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 19:38:22,574 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:22,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 19:38:22,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:38:22,574 INFO L87 Difference]: Start difference. First operand 2205 states and 6375 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:22,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:22,872 INFO L93 Difference]: Finished difference Result 2355 states and 6704 transitions. [2021-07-13 19:38:22,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 19:38:22,873 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:38:22,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:22,876 INFO L225 Difference]: With dead ends: 2355 [2021-07-13 19:38:22,876 INFO L226 Difference]: Without dead ends: 2355 [2021-07-13 19:38:22,876 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 248.5ms TimeCoverageRelationStatistics Valid=70, Invalid=482, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:38:22,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2355 states. [2021-07-13 19:38:22,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2355 to 2183. [2021-07-13 19:38:22,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2183 states, 2182 states have (on average 2.8900091659028413) internal successors, (6306), 2182 states have internal predecessors, (6306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:22,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2183 states to 2183 states and 6306 transitions. [2021-07-13 19:38:22,905 INFO L78 Accepts]: Start accepts. Automaton has 2183 states and 6306 transitions. Word has length 19 [2021-07-13 19:38:22,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:22,905 INFO L482 AbstractCegarLoop]: Abstraction has 2183 states and 6306 transitions. [2021-07-13 19:38:22,905 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:22,905 INFO L276 IsEmpty]: Start isEmpty. Operand 2183 states and 6306 transitions. [2021-07-13 19:38:22,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:38:22,907 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:22,908 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:23,108 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 480 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3911 [2021-07-13 19:38:23,108 INFO L430 AbstractCegarLoop]: === Iteration 490 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:23,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:23,108 INFO L82 PathProgramCache]: Analyzing trace with hash 1615670042, now seen corresponding path program 476 times [2021-07-13 19:38:23,108 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:23,108 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537467822] [2021-07-13 19:38:23,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:23,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:23,199 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:38:23,199 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:23,199 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537467822] [2021-07-13 19:38:23,199 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1537467822] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:23,199 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [691865808] [2021-07-13 19:38:23,199 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 481 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 481 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:38:23,232 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:38:23,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:38:23,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 19:38:23,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:38:23,343 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:23,344 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:23,344 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:38:23,345 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:23,347 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:23,347 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:23,347 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:38:23,348 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:23,350 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:23,351 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:23,351 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:38:23,351 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:23,353 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:23,354 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:38:23,354 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:23,386 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-07-13 19:38:23,386 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:38:23,387 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:38:23,387 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-07-13 19:38:23,448 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:23,449 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [691865808] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:23,449 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:38:23,449 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 19 [2021-07-13 19:38:23,449 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144578342] [2021-07-13 19:38:23,449 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:38:23,449 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:23,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:38:23,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:38:23,449 INFO L87 Difference]: Start difference. First operand 2183 states and 6306 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:23,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:23,973 INFO L93 Difference]: Finished difference Result 2246 states and 6416 transitions. [2021-07-13 19:38:23,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-13 19:38:23,973 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:38:23,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:23,976 INFO L225 Difference]: With dead ends: 2246 [2021-07-13 19:38:23,976 INFO L226 Difference]: Without dead ends: 2242 [2021-07-13 19:38:23,977 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 304 ImplicationChecksByTransitivity, 491.7ms TimeCoverageRelationStatistics Valid=148, Invalid=1112, Unknown=0, NotChecked=0, Total=1260 [2021-07-13 19:38:23,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2242 states. [2021-07-13 19:38:23,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2242 to 2181. [2021-07-13 19:38:23,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2181 states, 2180 states have (on average 2.889908256880734) internal successors, (6300), 2180 states have internal predecessors, (6300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:24,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2181 states to 2181 states and 6300 transitions. [2021-07-13 19:38:24,002 INFO L78 Accepts]: Start accepts. Automaton has 2181 states and 6300 transitions. Word has length 19 [2021-07-13 19:38:24,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:24,002 INFO L482 AbstractCegarLoop]: Abstraction has 2181 states and 6300 transitions. [2021-07-13 19:38:24,002 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:24,002 INFO L276 IsEmpty]: Start isEmpty. Operand 2181 states and 6300 transitions. [2021-07-13 19:38:24,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:38:24,005 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:24,005 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:24,205 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3914,481 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:38:24,205 INFO L430 AbstractCegarLoop]: === Iteration 491 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:24,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:24,205 INFO L82 PathProgramCache]: Analyzing trace with hash -950249920, now seen corresponding path program 477 times [2021-07-13 19:38:24,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:24,205 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363648137] [2021-07-13 19:38:24,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:24,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:24,275 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 18 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:38:24,275 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:24,275 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363648137] [2021-07-13 19:38:24,275 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1363648137] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:24,275 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [198231907] [2021-07-13 19:38:24,275 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 482 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 482 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:38:24,305 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 19:38:24,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:38:24,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 19:38:24,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:38:24,475 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:38:24,476 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:24,478 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:38:24,479 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:24,481 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:24,481 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:24,482 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:38:24,482 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:24,484 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:38:24,485 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:24,487 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:38:24,488 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:24,490 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:24,490 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:38:24,491 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:24,520 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-07-13 19:38:24,520 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:38:24,521 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:38:24,521 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-07-13 19:38:24,547 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:24,548 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [198231907] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:24,548 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:38:24,548 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 19 [2021-07-13 19:38:24,548 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310197353] [2021-07-13 19:38:24,548 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:38:24,548 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:24,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:38:24,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:38:24,548 INFO L87 Difference]: Start difference. First operand 2181 states and 6300 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:24,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:24,882 INFO L93 Difference]: Finished difference Result 2210 states and 6353 transitions. [2021-07-13 19:38:24,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 19:38:24,882 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:38:24,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:24,885 INFO L225 Difference]: With dead ends: 2210 [2021-07-13 19:38:24,885 INFO L226 Difference]: Without dead ends: 2202 [2021-07-13 19:38:24,885 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 360.9ms TimeCoverageRelationStatistics Valid=99, Invalid=713, Unknown=0, NotChecked=0, Total=812 [2021-07-13 19:38:24,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2202 states. [2021-07-13 19:38:24,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2202 to 2179. [2021-07-13 19:38:24,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2179 states, 2178 states have (on average 2.8898071625344355) internal successors, (6294), 2178 states have internal predecessors, (6294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:24,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2179 states to 2179 states and 6294 transitions. [2021-07-13 19:38:24,910 INFO L78 Accepts]: Start accepts. Automaton has 2179 states and 6294 transitions. Word has length 19 [2021-07-13 19:38:24,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:24,910 INFO L482 AbstractCegarLoop]: Abstraction has 2179 states and 6294 transitions. [2021-07-13 19:38:24,910 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:24,910 INFO L276 IsEmpty]: Start isEmpty. Operand 2179 states and 6294 transitions. [2021-07-13 19:38:24,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:38:24,913 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:24,913 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:25,113 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3920,482 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:38:25,113 INFO L430 AbstractCegarLoop]: === Iteration 492 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:25,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:25,113 INFO L82 PathProgramCache]: Analyzing trace with hash 1081234236, now seen corresponding path program 478 times [2021-07-13 19:38:25,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:25,113 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033122857] [2021-07-13 19:38:25,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:25,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:25,206 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 1 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:25,206 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:25,206 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033122857] [2021-07-13 19:38:25,206 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1033122857] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:25,206 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1698502805] [2021-07-13 19:38:25,206 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 483 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 483 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:38:25,234 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:38:25,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:38:25,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 19:38:25,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:38:25,362 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:25,362 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:25,363 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:38:25,364 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:25,366 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:25,366 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:25,366 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:38:25,367 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:25,369 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:25,369 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:25,370 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:38:25,370 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:25,372 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:25,380 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:38:25,381 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:25,419 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-07-13 19:38:25,419 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:38:25,420 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:38:25,420 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-07-13 19:38:25,481 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:25,481 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1698502805] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:25,481 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:38:25,481 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 20 [2021-07-13 19:38:25,481 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353427350] [2021-07-13 19:38:25,481 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 19:38:25,481 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:25,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 19:38:25,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:38:25,482 INFO L87 Difference]: Start difference. First operand 2179 states and 6294 transitions. Second operand has 20 states, 20 states have (on average 1.5) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:25,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:25,906 INFO L93 Difference]: Finished difference Result 2347 states and 6623 transitions. [2021-07-13 19:38:25,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-13 19:38:25,907 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.5) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:38:25,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:25,910 INFO L225 Difference]: With dead ends: 2347 [2021-07-13 19:38:25,910 INFO L226 Difference]: Without dead ends: 2344 [2021-07-13 19:38:25,910 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 424.5ms TimeCoverageRelationStatistics Valid=124, Invalid=868, Unknown=0, NotChecked=0, Total=992 [2021-07-13 19:38:25,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2344 states. [2021-07-13 19:38:25,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2344 to 2198. [2021-07-13 19:38:25,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2198 states, 2197 states have (on average 2.8939462903959945) internal successors, (6358), 2197 states have internal predecessors, (6358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:25,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2198 states to 2198 states and 6358 transitions. [2021-07-13 19:38:25,938 INFO L78 Accepts]: Start accepts. Automaton has 2198 states and 6358 transitions. Word has length 19 [2021-07-13 19:38:25,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:25,938 INFO L482 AbstractCegarLoop]: Abstraction has 2198 states and 6358 transitions. [2021-07-13 19:38:25,938 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.5) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:25,938 INFO L276 IsEmpty]: Start isEmpty. Operand 2198 states and 6358 transitions. [2021-07-13 19:38:25,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:38:25,941 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:25,941 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:26,141 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3927,483 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:38:26,141 INFO L430 AbstractCegarLoop]: === Iteration 493 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:26,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:26,142 INFO L82 PathProgramCache]: Analyzing trace with hash 1882850464, now seen corresponding path program 479 times [2021-07-13 19:38:26,142 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:26,142 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721790878] [2021-07-13 19:38:26,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:26,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:26,227 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:26,227 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:26,227 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721790878] [2021-07-13 19:38:26,228 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [721790878] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:26,228 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1985544706] [2021-07-13 19:38:26,228 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 484 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 484 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:38:26,258 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-13 19:38:26,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:38:26,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 19:38:26,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:38:26,383 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:26,384 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:26,384 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:38:26,385 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:26,387 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:26,388 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:26,388 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:38:26,388 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:26,391 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:26,391 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:26,391 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:38:26,392 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:26,394 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:26,394 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:38:26,395 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:26,428 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-07-13 19:38:26,428 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:38:26,429 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:38:26,429 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-07-13 19:38:26,500 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:26,500 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1985544706] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:26,500 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:38:26,500 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 20 [2021-07-13 19:38:26,500 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541278636] [2021-07-13 19:38:26,500 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 19:38:26,500 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:26,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 19:38:26,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:38:26,501 INFO L87 Difference]: Start difference. First operand 2198 states and 6358 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:27,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:27,054 INFO L93 Difference]: Finished difference Result 2282 states and 6504 transitions. [2021-07-13 19:38:27,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-13 19:38:27,054 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:38:27,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:27,057 INFO L225 Difference]: With dead ends: 2282 [2021-07-13 19:38:27,058 INFO L226 Difference]: Without dead ends: 2274 [2021-07-13 19:38:27,058 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 487.3ms TimeCoverageRelationStatistics Valid=120, Invalid=872, Unknown=0, NotChecked=0, Total=992 [2021-07-13 19:38:27,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2274 states. [2021-07-13 19:38:27,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2274 to 2208. [2021-07-13 19:38:27,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2208 states, 2207 states have (on average 2.8885364748527413) internal successors, (6375), 2207 states have internal predecessors, (6375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:27,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2208 states to 2208 states and 6375 transitions. [2021-07-13 19:38:27,083 INFO L78 Accepts]: Start accepts. Automaton has 2208 states and 6375 transitions. Word has length 19 [2021-07-13 19:38:27,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:27,083 INFO L482 AbstractCegarLoop]: Abstraction has 2208 states and 6375 transitions. [2021-07-13 19:38:27,083 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:27,083 INFO L276 IsEmpty]: Start isEmpty. Operand 2208 states and 6375 transitions. [2021-07-13 19:38:27,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:38:27,085 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:27,085 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:27,285 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3931,484 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:38:27,286 INFO L430 AbstractCegarLoop]: === Iteration 494 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:27,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:27,287 INFO L82 PathProgramCache]: Analyzing trace with hash -693773126, now seen corresponding path program 480 times [2021-07-13 19:38:27,287 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:27,287 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146829087] [2021-07-13 19:38:27,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:27,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:27,376 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:27,376 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:27,376 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146829087] [2021-07-13 19:38:27,376 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [146829087] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:27,376 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2059602196] [2021-07-13 19:38:27,376 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 485 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 485 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:38:27,406 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-13 19:38:27,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:38:27,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 19:38:27,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:38:27,534 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:27,534 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:27,534 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:38:27,535 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:27,537 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:27,538 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:27,538 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:38:27,539 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:27,541 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:27,541 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:27,541 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:38:27,542 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:27,544 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:27,544 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:38:27,545 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:27,577 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-07-13 19:38:27,577 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:38:27,578 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:38:27,578 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-07-13 19:38:27,626 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:27,626 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2059602196] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:27,627 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:38:27,627 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 20 [2021-07-13 19:38:27,627 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612239247] [2021-07-13 19:38:27,627 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 19:38:27,627 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:27,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 19:38:27,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:38:27,627 INFO L87 Difference]: Start difference. First operand 2208 states and 6375 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:28,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:28,162 INFO L93 Difference]: Finished difference Result 2365 states and 6681 transitions. [2021-07-13 19:38:28,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-13 19:38:28,162 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:38:28,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:28,166 INFO L225 Difference]: With dead ends: 2365 [2021-07-13 19:38:28,166 INFO L226 Difference]: Without dead ends: 2365 [2021-07-13 19:38:28,166 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 474.9ms TimeCoverageRelationStatistics Valid=138, Invalid=918, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 19:38:28,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2365 states. [2021-07-13 19:38:28,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2365 to 2193. [2021-07-13 19:38:28,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2193 states, 2192 states have (on average 2.883211678832117) internal successors, (6320), 2192 states have internal predecessors, (6320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:28,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2193 states to 2193 states and 6320 transitions. [2021-07-13 19:38:28,191 INFO L78 Accepts]: Start accepts. Automaton has 2193 states and 6320 transitions. Word has length 19 [2021-07-13 19:38:28,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:28,191 INFO L482 AbstractCegarLoop]: Abstraction has 2193 states and 6320 transitions. [2021-07-13 19:38:28,191 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:28,191 INFO L276 IsEmpty]: Start isEmpty. Operand 2193 states and 6320 transitions. [2021-07-13 19:38:28,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:38:28,194 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:28,194 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:28,404 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3936,485 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:38:28,405 INFO L430 AbstractCegarLoop]: === Iteration 495 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:28,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:28,405 INFO L82 PathProgramCache]: Analyzing trace with hash 1890580862, now seen corresponding path program 481 times [2021-07-13 19:38:28,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:28,405 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270971663] [2021-07-13 19:38:28,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:28,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:28,494 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:28,494 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:28,494 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270971663] [2021-07-13 19:38:28,494 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [270971663] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:28,495 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [795142768] [2021-07-13 19:38:28,495 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 486 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 486 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:38:28,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:28,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 19:38:28,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:38:28,677 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:28,678 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:28,678 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:38:28,679 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:28,681 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:28,681 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:38:28,682 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:28,704 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-07-13 19:38:28,704 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:38:28,705 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:38:28,705 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-07-13 19:38:28,725 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:28,726 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [795142768] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:28,726 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:38:28,726 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 20 [2021-07-13 19:38:28,726 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320732003] [2021-07-13 19:38:28,726 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 19:38:28,726 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:28,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 19:38:28,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:38:28,726 INFO L87 Difference]: Start difference. First operand 2193 states and 6320 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:29,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:29,328 INFO L93 Difference]: Finished difference Result 2384 states and 6720 transitions. [2021-07-13 19:38:29,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-13 19:38:29,329 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:38:29,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:29,332 INFO L225 Difference]: With dead ends: 2384 [2021-07-13 19:38:29,332 INFO L226 Difference]: Without dead ends: 2384 [2021-07-13 19:38:29,332 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 485.6ms TimeCoverageRelationStatistics Valid=142, Invalid=1048, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 19:38:29,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2384 states. [2021-07-13 19:38:29,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2384 to 2185. [2021-07-13 19:38:29,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2185 states, 2184 states have (on average 2.880952380952381) internal successors, (6292), 2184 states have internal predecessors, (6292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:29,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2185 states to 2185 states and 6292 transitions. [2021-07-13 19:38:29,356 INFO L78 Accepts]: Start accepts. Automaton has 2185 states and 6292 transitions. Word has length 19 [2021-07-13 19:38:29,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:29,356 INFO L482 AbstractCegarLoop]: Abstraction has 2185 states and 6292 transitions. [2021-07-13 19:38:29,356 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:29,356 INFO L276 IsEmpty]: Start isEmpty. Operand 2185 states and 6292 transitions. [2021-07-13 19:38:29,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:38:29,358 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:29,358 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:29,558 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3940,486 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:38:29,559 INFO L430 AbstractCegarLoop]: === Iteration 496 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:29,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:29,559 INFO L82 PathProgramCache]: Analyzing trace with hash 401175866, now seen corresponding path program 482 times [2021-07-13 19:38:29,559 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:29,559 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121272886] [2021-07-13 19:38:29,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:29,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:29,636 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:29,636 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:29,636 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121272886] [2021-07-13 19:38:29,636 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2121272886] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:29,636 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2085905842] [2021-07-13 19:38:29,636 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 487 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 487 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:38:29,663 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:38:29,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:38:29,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 19:38:29,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:38:29,821 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:29,821 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:29,822 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:38:29,822 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:29,824 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:29,825 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:38:29,825 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:29,847 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-07-13 19:38:29,847 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:38:29,848 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:38:29,848 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-07-13 19:38:29,869 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:29,869 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2085905842] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:29,869 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:38:29,869 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 20 [2021-07-13 19:38:29,869 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599603338] [2021-07-13 19:38:29,869 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 19:38:29,870 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:29,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 19:38:29,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:38:29,870 INFO L87 Difference]: Start difference. First operand 2185 states and 6292 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:30,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:30,258 INFO L93 Difference]: Finished difference Result 2349 states and 6659 transitions. [2021-07-13 19:38:30,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 19:38:30,259 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:38:30,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:30,262 INFO L225 Difference]: With dead ends: 2349 [2021-07-13 19:38:30,262 INFO L226 Difference]: Without dead ends: 2349 [2021-07-13 19:38:30,262 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 218.8ms TimeCoverageRelationStatistics Valid=57, Invalid=405, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:38:30,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2349 states. [2021-07-13 19:38:30,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2349 to 2173. [2021-07-13 19:38:30,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2173 states, 2172 states have (on average 2.882136279926335) internal successors, (6260), 2172 states have internal predecessors, (6260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:30,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2173 states to 2173 states and 6260 transitions. [2021-07-13 19:38:30,286 INFO L78 Accepts]: Start accepts. Automaton has 2173 states and 6260 transitions. Word has length 19 [2021-07-13 19:38:30,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:30,286 INFO L482 AbstractCegarLoop]: Abstraction has 2173 states and 6260 transitions. [2021-07-13 19:38:30,287 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:30,287 INFO L276 IsEmpty]: Start isEmpty. Operand 2173 states and 6260 transitions. [2021-07-13 19:38:30,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:38:30,289 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:30,289 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:30,489 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3943,487 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:38:30,489 INFO L430 AbstractCegarLoop]: === Iteration 497 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:30,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:30,490 INFO L82 PathProgramCache]: Analyzing trace with hash 1275013240, now seen corresponding path program 483 times [2021-07-13 19:38:30,490 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:30,490 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985558010] [2021-07-13 19:38:30,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:30,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:30,590 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 1 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:30,590 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:30,590 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985558010] [2021-07-13 19:38:30,590 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [985558010] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:30,590 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1105736771] [2021-07-13 19:38:30,590 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 488 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 488 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:38:30,619 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-13 19:38:30,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:38:30,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 19:38:30,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:38:30,758 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:30,759 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:30,759 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:38:30,760 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:30,762 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:30,763 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:30,763 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:38:30,763 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:30,765 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:30,766 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:30,766 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:38:30,767 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:30,769 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:30,769 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:38:30,769 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:30,801 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-07-13 19:38:30,802 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:38:30,802 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:38:30,802 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-07-13 19:38:30,854 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:30,854 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1105736771] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:30,854 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:38:30,854 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 21 [2021-07-13 19:38:30,854 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961385449] [2021-07-13 19:38:30,854 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:38:30,854 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:30,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:38:30,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:38:30,855 INFO L87 Difference]: Start difference. First operand 2173 states and 6260 transitions. Second operand has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:31,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:31,317 INFO L93 Difference]: Finished difference Result 2397 states and 6740 transitions. [2021-07-13 19:38:31,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 19:38:31,317 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:38:31,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:31,321 INFO L225 Difference]: With dead ends: 2397 [2021-07-13 19:38:31,321 INFO L226 Difference]: Without dead ends: 2396 [2021-07-13 19:38:31,321 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 398.4ms TimeCoverageRelationStatistics Valid=103, Invalid=767, Unknown=0, NotChecked=0, Total=870 [2021-07-13 19:38:31,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2396 states. [2021-07-13 19:38:31,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2396 to 2189. [2021-07-13 19:38:31,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2189 states, 2188 states have (on average 2.882998171846435) internal successors, (6308), 2188 states have internal predecessors, (6308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:31,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2189 states to 2189 states and 6308 transitions. [2021-07-13 19:38:31,360 INFO L78 Accepts]: Start accepts. Automaton has 2189 states and 6308 transitions. Word has length 19 [2021-07-13 19:38:31,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:31,360 INFO L482 AbstractCegarLoop]: Abstraction has 2189 states and 6308 transitions. [2021-07-13 19:38:31,360 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:31,360 INFO L276 IsEmpty]: Start isEmpty. Operand 2189 states and 6308 transitions. [2021-07-13 19:38:31,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:38:31,362 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:31,362 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:31,563 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 488 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3946 [2021-07-13 19:38:31,563 INFO L430 AbstractCegarLoop]: === Iteration 498 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:31,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:31,563 INFO L82 PathProgramCache]: Analyzing trace with hash 2076629468, now seen corresponding path program 484 times [2021-07-13 19:38:31,563 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:31,563 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140399763] [2021-07-13 19:38:31,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:31,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:31,666 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:31,666 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:31,666 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140399763] [2021-07-13 19:38:31,666 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2140399763] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:31,666 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [675517045] [2021-07-13 19:38:31,666 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 489 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 489 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:38:31,694 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:38:31,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:38:31,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 19:38:31,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:38:31,836 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:31,836 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:31,836 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:38:31,837 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:31,840 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:31,840 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:31,840 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:38:31,841 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:31,843 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:31,843 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:31,844 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:38:31,844 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:31,846 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:31,846 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:38:31,847 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:31,879 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-07-13 19:38:31,879 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:38:31,880 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:38:31,880 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-07-13 19:38:31,950 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:31,951 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [675517045] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:31,951 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:38:31,951 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 21 [2021-07-13 19:38:31,951 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311395798] [2021-07-13 19:38:31,951 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:38:31,951 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:31,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:38:31,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:38:31,951 INFO L87 Difference]: Start difference. First operand 2189 states and 6308 transitions. Second operand has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:33,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:33,019 INFO L93 Difference]: Finished difference Result 2373 states and 6622 transitions. [2021-07-13 19:38:33,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-07-13 19:38:33,020 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:38:33,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:33,023 INFO L225 Difference]: With dead ends: 2373 [2021-07-13 19:38:33,024 INFO L226 Difference]: Without dead ends: 2361 [2021-07-13 19:38:33,024 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 573 ImplicationChecksByTransitivity, 938.9ms TimeCoverageRelationStatistics Valid=231, Invalid=1931, Unknown=0, NotChecked=0, Total=2162 [2021-07-13 19:38:33,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2361 states. [2021-07-13 19:38:33,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2361 to 2185. [2021-07-13 19:38:33,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2185 states, 2184 states have (on average 2.874084249084249) internal successors, (6277), 2184 states have internal predecessors, (6277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:33,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2185 states to 2185 states and 6277 transitions. [2021-07-13 19:38:33,052 INFO L78 Accepts]: Start accepts. Automaton has 2185 states and 6277 transitions. Word has length 19 [2021-07-13 19:38:33,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:33,052 INFO L482 AbstractCegarLoop]: Abstraction has 2185 states and 6277 transitions. [2021-07-13 19:38:33,053 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:33,053 INFO L276 IsEmpty]: Start isEmpty. Operand 2185 states and 6277 transitions. [2021-07-13 19:38:33,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:38:33,055 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:33,055 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:33,255 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3950,489 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:38:33,255 INFO L430 AbstractCegarLoop]: === Iteration 499 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:33,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:33,256 INFO L82 PathProgramCache]: Analyzing trace with hash -499994122, now seen corresponding path program 485 times [2021-07-13 19:38:33,256 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:33,256 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197354802] [2021-07-13 19:38:33,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:33,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:33,363 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:33,364 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:33,364 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197354802] [2021-07-13 19:38:33,364 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [197354802] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:33,364 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1802096851] [2021-07-13 19:38:33,364 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 490 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 490 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:38:33,393 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-13 19:38:33,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:38:33,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 19:38:33,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:38:33,545 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:33,545 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:33,545 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:38:33,546 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:33,548 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:33,549 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:33,549 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:38:33,550 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:33,552 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:33,552 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:33,552 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:38:33,553 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:33,555 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:33,555 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:38:33,556 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:33,588 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-07-13 19:38:33,588 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:38:33,589 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:38:33,589 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-07-13 19:38:33,639 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:33,639 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1802096851] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:33,639 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:38:33,639 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 21 [2021-07-13 19:38:33,639 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69428717] [2021-07-13 19:38:33,640 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:38:33,640 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:33,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:38:33,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:38:33,640 INFO L87 Difference]: Start difference. First operand 2185 states and 6277 transitions. Second operand has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:34,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:34,399 INFO L93 Difference]: Finished difference Result 2357 states and 6572 transitions. [2021-07-13 19:38:34,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-13 19:38:34,400 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:38:34,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:34,403 INFO L225 Difference]: With dead ends: 2357 [2021-07-13 19:38:34,403 INFO L226 Difference]: Without dead ends: 2353 [2021-07-13 19:38:34,403 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 342 ImplicationChecksByTransitivity, 720.8ms TimeCoverageRelationStatistics Valid=187, Invalid=1295, Unknown=0, NotChecked=0, Total=1482 [2021-07-13 19:38:34,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2353 states. [2021-07-13 19:38:34,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2353 to 2153. [2021-07-13 19:38:34,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2153 states, 2152 states have (on average 2.8615241635687734) internal successors, (6158), 2152 states have internal predecessors, (6158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:34,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2153 states to 2153 states and 6158 transitions. [2021-07-13 19:38:34,427 INFO L78 Accepts]: Start accepts. Automaton has 2153 states and 6158 transitions. Word has length 19 [2021-07-13 19:38:34,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:34,427 INFO L482 AbstractCegarLoop]: Abstraction has 2153 states and 6158 transitions. [2021-07-13 19:38:34,427 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:34,427 INFO L276 IsEmpty]: Start isEmpty. Operand 2153 states and 6158 transitions. [2021-07-13 19:38:34,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:38:34,429 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:34,429 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:34,629 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 490 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3955 [2021-07-13 19:38:34,630 INFO L430 AbstractCegarLoop]: === Iteration 500 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:34,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:34,630 INFO L82 PathProgramCache]: Analyzing trace with hash 2084359866, now seen corresponding path program 486 times [2021-07-13 19:38:34,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:34,630 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745299635] [2021-07-13 19:38:34,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:34,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:34,725 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:34,725 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:34,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745299635] [2021-07-13 19:38:34,725 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1745299635] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:34,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [341438414] [2021-07-13 19:38:34,725 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 491 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 491 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:38:34,754 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-13 19:38:34,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:38:34,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 19:38:34,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:38:34,926 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:34,926 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:34,926 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:38:34,927 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:34,929 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:34,930 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:38:34,930 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:34,952 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-07-13 19:38:34,952 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:38:34,953 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:38:34,953 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-07-13 19:38:34,984 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:34,984 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [341438414] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:34,984 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:38:34,984 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 21 [2021-07-13 19:38:34,985 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654347628] [2021-07-13 19:38:34,985 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:38:34,985 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:34,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:38:34,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=366, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:38:34,985 INFO L87 Difference]: Start difference. First operand 2153 states and 6158 transitions. Second operand has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:35,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:35,884 INFO L93 Difference]: Finished difference Result 2535 states and 6885 transitions. [2021-07-13 19:38:35,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-07-13 19:38:35,884 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:38:35,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:35,888 INFO L225 Difference]: With dead ends: 2535 [2021-07-13 19:38:35,888 INFO L226 Difference]: Without dead ends: 2535 [2021-07-13 19:38:35,888 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 650.6ms TimeCoverageRelationStatistics Valid=197, Invalid=1609, Unknown=0, NotChecked=0, Total=1806 [2021-07-13 19:38:35,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2535 states. [2021-07-13 19:38:35,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2535 to 2099. [2021-07-13 19:38:35,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2099 states, 2098 states have (on average 2.8512869399428027) internal successors, (5982), 2098 states have internal predecessors, (5982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:35,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2099 states to 2099 states and 5982 transitions. [2021-07-13 19:38:35,916 INFO L78 Accepts]: Start accepts. Automaton has 2099 states and 5982 transitions. Word has length 19 [2021-07-13 19:38:35,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:35,916 INFO L482 AbstractCegarLoop]: Abstraction has 2099 states and 5982 transitions. [2021-07-13 19:38:35,916 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:35,916 INFO L276 IsEmpty]: Start isEmpty. Operand 2099 states and 5982 transitions. [2021-07-13 19:38:35,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:38:35,918 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:35,919 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:36,119 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3959,491 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:38:36,119 INFO L430 AbstractCegarLoop]: === Iteration 501 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:36,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:36,119 INFO L82 PathProgramCache]: Analyzing trace with hash 594954870, now seen corresponding path program 487 times [2021-07-13 19:38:36,119 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:36,119 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915655591] [2021-07-13 19:38:36,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:36,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:36,209 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:36,209 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:36,209 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915655591] [2021-07-13 19:38:36,209 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915655591] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:36,209 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2114878971] [2021-07-13 19:38:36,209 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 492 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 492 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:38:36,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:36,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 19:38:36,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:38:36,418 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:36,418 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:36,418 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:38:36,419 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:36,421 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:36,422 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:38:36,422 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:36,444 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-07-13 19:38:36,444 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:38:36,445 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:38:36,445 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-07-13 19:38:36,467 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:36,467 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2114878971] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:36,467 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:38:36,467 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 21 [2021-07-13 19:38:36,467 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45198401] [2021-07-13 19:38:36,467 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:38:36,467 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:36,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:38:36,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=368, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:38:36,468 INFO L87 Difference]: Start difference. First operand 2099 states and 5982 transitions. Second operand has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:37,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:37,613 INFO L93 Difference]: Finished difference Result 2411 states and 6591 transitions. [2021-07-13 19:38:37,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-07-13 19:38:37,613 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:38:37,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:37,616 INFO L225 Difference]: With dead ends: 2411 [2021-07-13 19:38:37,616 INFO L226 Difference]: Without dead ends: 2411 [2021-07-13 19:38:37,616 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 644 ImplicationChecksByTransitivity, 921.3ms TimeCoverageRelationStatistics Valid=289, Invalid=2261, Unknown=0, NotChecked=0, Total=2550 [2021-07-13 19:38:37,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2411 states. [2021-07-13 19:38:37,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2411 to 2081. [2021-07-13 19:38:37,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2081 states, 2080 states have (on average 2.84375) internal successors, (5915), 2080 states have internal predecessors, (5915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:37,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2081 states to 2081 states and 5915 transitions. [2021-07-13 19:38:37,640 INFO L78 Accepts]: Start accepts. Automaton has 2081 states and 5915 transitions. Word has length 19 [2021-07-13 19:38:37,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:37,640 INFO L482 AbstractCegarLoop]: Abstraction has 2081 states and 5915 transitions. [2021-07-13 19:38:37,640 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:37,640 INFO L276 IsEmpty]: Start isEmpty. Operand 2081 states and 5915 transitions. [2021-07-13 19:38:37,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:38:37,642 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:37,642 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:37,842 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3962,492 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:38:37,843 INFO L430 AbstractCegarLoop]: === Iteration 502 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:37,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:37,843 INFO L82 PathProgramCache]: Analyzing trace with hash 1668040250, now seen corresponding path program 488 times [2021-07-13 19:38:37,843 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:37,843 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467969027] [2021-07-13 19:38:37,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:37,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:37,933 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:37,933 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:37,933 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467969027] [2021-07-13 19:38:37,933 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1467969027] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:37,933 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1811608859] [2021-07-13 19:38:37,933 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 493 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 493 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:38:37,962 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:38:37,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:38:37,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 19:38:37,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:38:38,131 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:38,132 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:38,132 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:38:38,133 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:38,135 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:38,135 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:38:38,136 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:38,160 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-07-13 19:38:38,160 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:38:38,161 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:38:38,161 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-07-13 19:38:38,184 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:38,184 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1811608859] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:38,184 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:38:38,184 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 21 [2021-07-13 19:38:38,184 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384643810] [2021-07-13 19:38:38,184 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:38:38,184 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:38,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:38:38,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=370, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:38:38,185 INFO L87 Difference]: Start difference. First operand 2081 states and 5915 transitions. Second operand has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:38,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:38,562 INFO L93 Difference]: Finished difference Result 2196 states and 6134 transitions. [2021-07-13 19:38:38,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 19:38:38,562 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:38:38,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:38,565 INFO L225 Difference]: With dead ends: 2196 [2021-07-13 19:38:38,565 INFO L226 Difference]: Without dead ends: 2196 [2021-07-13 19:38:38,566 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 233.9ms TimeCoverageRelationStatistics Valid=54, Invalid=408, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:38:38,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2196 states. [2021-07-13 19:38:38,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2196 to 2060. [2021-07-13 19:38:38,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2060 states, 2059 states have (on average 2.8411850412821757) internal successors, (5850), 2059 states have internal predecessors, (5850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:38,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2060 states to 2060 states and 5850 transitions. [2021-07-13 19:38:38,598 INFO L78 Accepts]: Start accepts. Automaton has 2060 states and 5850 transitions. Word has length 19 [2021-07-13 19:38:38,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:38,598 INFO L482 AbstractCegarLoop]: Abstraction has 2060 states and 5850 transitions. [2021-07-13 19:38:38,598 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:38,598 INFO L276 IsEmpty]: Start isEmpty. Operand 2060 states and 5850 transitions. [2021-07-13 19:38:38,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:38:38,601 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:38,601 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:38,804 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3965,493 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:38:38,805 INFO L430 AbstractCegarLoop]: === Iteration 503 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:38,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:38,805 INFO L82 PathProgramCache]: Analyzing trace with hash -143150182, now seen corresponding path program 489 times [2021-07-13 19:38:38,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:38,805 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374181463] [2021-07-13 19:38:38,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:38,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:38,903 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:38:38,904 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:38,904 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374181463] [2021-07-13 19:38:38,904 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [374181463] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:38,904 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [772800965] [2021-07-13 19:38:38,904 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 494 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 494 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:38:38,932 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:38:38,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:38:38,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 19:38:38,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:38:39,077 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:39,078 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:39,078 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:38:39,079 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:39,081 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:39,081 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:39,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:38:39,082 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:39,086 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:39,086 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:39,086 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:38:39,087 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:39,089 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:39,089 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:38:39,090 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:39,122 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-07-13 19:38:39,122 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:38:39,123 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:38:39,123 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-07-13 19:38:39,187 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:39,187 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [772800965] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:39,187 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:38:39,187 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 21 [2021-07-13 19:38:39,187 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962725396] [2021-07-13 19:38:39,187 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:38:39,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:39,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:38:39,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:38:39,187 INFO L87 Difference]: Start difference. First operand 2060 states and 5850 transitions. Second operand has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:39,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:39,516 INFO L93 Difference]: Finished difference Result 2143 states and 6007 transitions. [2021-07-13 19:38:39,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 19:38:39,516 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:38:39,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:39,519 INFO L225 Difference]: With dead ends: 2143 [2021-07-13 19:38:39,519 INFO L226 Difference]: Without dead ends: 2139 [2021-07-13 19:38:39,519 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 391.1ms TimeCoverageRelationStatistics Valid=89, Invalid=667, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:38:39,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2139 states. [2021-07-13 19:38:39,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2139 to 2068. [2021-07-13 19:38:39,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2068 states, 2067 states have (on average 2.840832123850992) internal successors, (5872), 2067 states have internal predecessors, (5872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:39,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2068 states to 2068 states and 5872 transitions. [2021-07-13 19:38:39,541 INFO L78 Accepts]: Start accepts. Automaton has 2068 states and 5872 transitions. Word has length 19 [2021-07-13 19:38:39,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:39,541 INFO L482 AbstractCegarLoop]: Abstraction has 2068 states and 5872 transitions. [2021-07-13 19:38:39,541 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:39,541 INFO L276 IsEmpty]: Start isEmpty. Operand 2068 states and 5872 transitions. [2021-07-13 19:38:39,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:38:39,543 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:39,543 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:39,744 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 494 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3968 [2021-07-13 19:38:39,744 INFO L430 AbstractCegarLoop]: === Iteration 504 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:39,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:39,744 INFO L82 PathProgramCache]: Analyzing trace with hash 1585897152, now seen corresponding path program 490 times [2021-07-13 19:38:39,744 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:39,745 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367067272] [2021-07-13 19:38:39,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:39,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:39,839 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:38:39,839 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:39,839 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367067272] [2021-07-13 19:38:39,839 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1367067272] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:39,839 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [728062502] [2021-07-13 19:38:39,839 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 495 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 495 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:38:39,878 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:38:39,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:38:39,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 19:38:39,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:38:40,068 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:38:40,069 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:40,071 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:38:40,072 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:40,074 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:40,075 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:40,075 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:38:40,076 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:40,078 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:38:40,088 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:40,090 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:38:40,091 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:40,093 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:40,094 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:38:40,094 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:40,126 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-07-13 19:38:40,127 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:38:40,128 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:38:40,128 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-07-13 19:38:40,156 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:40,156 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [728062502] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:40,156 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:38:40,156 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 21 [2021-07-13 19:38:40,157 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67604286] [2021-07-13 19:38:40,157 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:38:40,157 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:40,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:38:40,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:38:40,157 INFO L87 Difference]: Start difference. First operand 2068 states and 5872 transitions. Second operand has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:40,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:40,458 INFO L93 Difference]: Finished difference Result 2118 states and 5951 transitions. [2021-07-13 19:38:40,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 19:38:40,458 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:38:40,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:40,461 INFO L225 Difference]: With dead ends: 2118 [2021-07-13 19:38:40,461 INFO L226 Difference]: Without dead ends: 2110 [2021-07-13 19:38:40,461 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 384.9ms TimeCoverageRelationStatistics Valid=91, Invalid=665, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:38:40,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2110 states. [2021-07-13 19:38:40,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2110 to 2067. [2021-07-13 19:38:40,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2067 states, 2066 states have (on average 2.839303000968054) internal successors, (5866), 2066 states have internal predecessors, (5866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:40,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2067 states to 2067 states and 5866 transitions. [2021-07-13 19:38:40,484 INFO L78 Accepts]: Start accepts. Automaton has 2067 states and 5866 transitions. Word has length 19 [2021-07-13 19:38:40,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:40,484 INFO L482 AbstractCegarLoop]: Abstraction has 2067 states and 5866 transitions. [2021-07-13 19:38:40,484 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:40,485 INFO L276 IsEmpty]: Start isEmpty. Operand 2067 states and 5866 transitions. [2021-07-13 19:38:40,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:38:40,487 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:40,487 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:40,687 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 495 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3974 [2021-07-13 19:38:40,687 INFO L430 AbstractCegarLoop]: === Iteration 505 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:40,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:40,687 INFO L82 PathProgramCache]: Analyzing trace with hash -648210342, now seen corresponding path program 491 times [2021-07-13 19:38:40,687 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:40,687 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823750910] [2021-07-13 19:38:40,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:40,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:40,779 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:38:40,779 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:40,779 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823750910] [2021-07-13 19:38:40,779 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1823750910] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:40,779 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [422949803] [2021-07-13 19:38:40,779 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 496 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 496 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:38:40,808 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:38:40,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:38:40,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 19:38:40,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:38:41,019 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:38:41,020 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:41,022 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:38:41,023 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:41,025 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:41,026 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:41,026 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:38:41,027 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:41,029 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:38:41,030 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:41,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:38:41,033 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:41,035 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:41,035 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:38:41,036 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:41,065 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-07-13 19:38:41,065 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:38:41,066 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:38:41,066 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-07-13 19:38:41,095 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:41,095 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [422949803] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:41,095 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:38:41,095 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 21 [2021-07-13 19:38:41,095 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604974658] [2021-07-13 19:38:41,095 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:38:41,095 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:41,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:38:41,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:38:41,095 INFO L87 Difference]: Start difference. First operand 2067 states and 5866 transitions. Second operand has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:41,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:41,535 INFO L93 Difference]: Finished difference Result 2121 states and 5951 transitions. [2021-07-13 19:38:41,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 19:38:41,536 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:38:41,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:41,539 INFO L225 Difference]: With dead ends: 2121 [2021-07-13 19:38:41,539 INFO L226 Difference]: Without dead ends: 2109 [2021-07-13 19:38:41,539 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 476.6ms TimeCoverageRelationStatistics Valid=112, Invalid=880, Unknown=0, NotChecked=0, Total=992 [2021-07-13 19:38:41,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2109 states. [2021-07-13 19:38:41,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2109 to 2066. [2021-07-13 19:38:41,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2066 states, 2065 states have (on average 2.8372881355932202) internal successors, (5859), 2065 states have internal predecessors, (5859), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:41,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2066 states to 2066 states and 5859 transitions. [2021-07-13 19:38:41,563 INFO L78 Accepts]: Start accepts. Automaton has 2066 states and 5859 transitions. Word has length 19 [2021-07-13 19:38:41,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:41,563 INFO L482 AbstractCegarLoop]: Abstraction has 2066 states and 5859 transitions. [2021-07-13 19:38:41,563 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:41,563 INFO L276 IsEmpty]: Start isEmpty. Operand 2066 states and 5859 transitions. [2021-07-13 19:38:41,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:38:41,565 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:41,565 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:41,765 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3981,496 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:38:41,765 INFO L430 AbstractCegarLoop]: === Iteration 506 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:41,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:41,766 INFO L82 PathProgramCache]: Analyzing trace with hash -1186065920, now seen corresponding path program 492 times [2021-07-13 19:38:41,766 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:41,766 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988872816] [2021-07-13 19:38:41,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:41,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:41,857 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:38:41,857 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:41,858 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988872816] [2021-07-13 19:38:41,858 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1988872816] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:41,858 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1123925668] [2021-07-13 19:38:41,858 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 497 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 497 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:38:41,886 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:38:41,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:38:41,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 19:38:41,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:38:42,086 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:38:42,087 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:42,089 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:38:42,090 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:42,092 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:42,093 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:42,093 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:38:42,093 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:42,096 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:38:42,096 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:42,098 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:38:42,099 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:42,101 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:42,102 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:38:42,102 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:42,131 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-07-13 19:38:42,132 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:38:42,132 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:38:42,133 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-07-13 19:38:42,170 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:42,171 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1123925668] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:42,171 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:38:42,171 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 21 [2021-07-13 19:38:42,171 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190890245] [2021-07-13 19:38:42,171 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:38:42,171 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:42,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:38:42,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=370, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:38:42,171 INFO L87 Difference]: Start difference. First operand 2066 states and 5859 transitions. Second operand has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:42,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:42,595 INFO L93 Difference]: Finished difference Result 2106 states and 5923 transitions. [2021-07-13 19:38:42,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 19:38:42,595 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:38:42,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:42,598 INFO L225 Difference]: With dead ends: 2106 [2021-07-13 19:38:42,598 INFO L226 Difference]: Without dead ends: 2090 [2021-07-13 19:38:42,598 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 468.4ms TimeCoverageRelationStatistics Valid=104, Invalid=826, Unknown=0, NotChecked=0, Total=930 [2021-07-13 19:38:42,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2090 states. [2021-07-13 19:38:42,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2090 to 2066. [2021-07-13 19:38:42,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2066 states, 2065 states have (on average 2.834866828087167) internal successors, (5854), 2065 states have internal predecessors, (5854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:42,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2066 states to 2066 states and 5854 transitions. [2021-07-13 19:38:42,619 INFO L78 Accepts]: Start accepts. Automaton has 2066 states and 5854 transitions. Word has length 19 [2021-07-13 19:38:42,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:42,619 INFO L482 AbstractCegarLoop]: Abstraction has 2066 states and 5854 transitions. [2021-07-13 19:38:42,619 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:42,619 INFO L276 IsEmpty]: Start isEmpty. Operand 2066 states and 5854 transitions. [2021-07-13 19:38:42,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:38:42,622 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:42,622 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:42,822 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 497 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3988 [2021-07-13 19:38:42,822 INFO L430 AbstractCegarLoop]: === Iteration 507 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:42,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:42,822 INFO L82 PathProgramCache]: Analyzing trace with hash -1307772228, now seen corresponding path program 493 times [2021-07-13 19:38:42,822 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:42,822 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194750526] [2021-07-13 19:38:42,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:42,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:42,951 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:42,951 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:42,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194750526] [2021-07-13 19:38:42,951 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [194750526] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:42,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [445432232] [2021-07-13 19:38:42,951 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 498 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 498 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:38:42,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:42,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 19:38:42,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:38:43,138 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:43,139 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:43,139 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:38:43,140 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:43,142 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:43,142 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:43,142 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:38:43,143 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:43,145 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:43,146 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:43,146 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:38:43,146 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:43,148 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:43,149 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:38:43,149 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:43,181 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-07-13 19:38:43,181 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:38:43,182 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:38:43,182 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-07-13 19:38:43,238 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:43,238 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [445432232] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:43,238 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:38:43,238 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-07-13 19:38:43,238 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061347361] [2021-07-13 19:38:43,238 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 19:38:43,238 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:43,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 19:38:43,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=408, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:38:43,239 INFO L87 Difference]: Start difference. First operand 2066 states and 5854 transitions. Second operand has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:43,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:43,662 INFO L93 Difference]: Finished difference Result 2263 states and 6214 transitions. [2021-07-13 19:38:43,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 19:38:43,662 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:38:43,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:43,665 INFO L225 Difference]: With dead ends: 2263 [2021-07-13 19:38:43,665 INFO L226 Difference]: Without dead ends: 2263 [2021-07-13 19:38:43,665 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 443.9ms TimeCoverageRelationStatistics Valid=99, Invalid=713, Unknown=0, NotChecked=0, Total=812 [2021-07-13 19:38:43,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2263 states. [2021-07-13 19:38:43,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2263 to 2094. [2021-07-13 19:38:43,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2094 states, 2093 states have (on average 2.84089823220258) internal successors, (5946), 2093 states have internal predecessors, (5946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:43,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2094 states to 2094 states and 5946 transitions. [2021-07-13 19:38:43,690 INFO L78 Accepts]: Start accepts. Automaton has 2094 states and 5946 transitions. Word has length 19 [2021-07-13 19:38:43,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:43,690 INFO L482 AbstractCegarLoop]: Abstraction has 2094 states and 5946 transitions. [2021-07-13 19:38:43,690 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:43,690 INFO L276 IsEmpty]: Start isEmpty. Operand 2094 states and 5946 transitions. [2021-07-13 19:38:43,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:38:43,692 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:43,692 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:43,892 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3995,498 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:38:43,892 INFO L430 AbstractCegarLoop]: === Iteration 508 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:43,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:43,893 INFO L82 PathProgramCache]: Analyzing trace with hash -506156000, now seen corresponding path program 494 times [2021-07-13 19:38:43,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:43,893 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591897361] [2021-07-13 19:38:43,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:43,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:44,007 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:44,008 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:44,008 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591897361] [2021-07-13 19:38:44,008 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [591897361] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:44,008 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [447874559] [2021-07-13 19:38:44,008 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 499 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 499 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:38:44,036 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:38:44,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:38:44,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 19:38:44,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:38:44,189 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:44,190 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:44,190 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:38:44,191 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:44,193 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:44,193 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:44,194 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:38:44,194 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:44,196 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:44,197 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:44,197 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:38:44,198 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:44,199 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:44,200 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:38:44,200 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:44,232 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-07-13 19:38:44,233 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:38:44,233 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:38:44,233 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-07-13 19:38:44,305 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:44,305 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [447874559] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:44,305 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:38:44,305 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-07-13 19:38:44,305 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787470227] [2021-07-13 19:38:44,305 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 19:38:44,305 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:44,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 19:38:44,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=405, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:38:44,306 INFO L87 Difference]: Start difference. First operand 2094 states and 5946 transitions. Second operand has 22 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 22 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:45,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:45,299 INFO L93 Difference]: Finished difference Result 2277 states and 6275 transitions. [2021-07-13 19:38:45,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-07-13 19:38:45,300 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 22 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:38:45,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:45,303 INFO L225 Difference]: With dead ends: 2277 [2021-07-13 19:38:45,303 INFO L226 Difference]: Without dead ends: 2265 [2021-07-13 19:38:45,303 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 539 ImplicationChecksByTransitivity, 909.8ms TimeCoverageRelationStatistics Valid=212, Invalid=1858, Unknown=0, NotChecked=0, Total=2070 [2021-07-13 19:38:45,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2265 states. [2021-07-13 19:38:45,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2265 to 2111. [2021-07-13 19:38:45,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2111 states, 2110 states have (on average 2.844075829383886) internal successors, (6001), 2110 states have internal predecessors, (6001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:45,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2111 states to 2111 states and 6001 transitions. [2021-07-13 19:38:45,329 INFO L78 Accepts]: Start accepts. Automaton has 2111 states and 6001 transitions. Word has length 19 [2021-07-13 19:38:45,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:45,329 INFO L482 AbstractCegarLoop]: Abstraction has 2111 states and 6001 transitions. [2021-07-13 19:38:45,329 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 22 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:45,329 INFO L276 IsEmpty]: Start isEmpty. Operand 2111 states and 6001 transitions. [2021-07-13 19:38:45,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:38:45,331 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:45,332 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:45,532 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 499 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3999 [2021-07-13 19:38:45,532 INFO L430 AbstractCegarLoop]: === Iteration 509 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:45,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:45,532 INFO L82 PathProgramCache]: Analyzing trace with hash 1212187706, now seen corresponding path program 495 times [2021-07-13 19:38:45,532 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:45,532 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26141908] [2021-07-13 19:38:45,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:45,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:45,646 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:45,647 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:45,647 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26141908] [2021-07-13 19:38:45,647 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [26141908] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:45,647 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1232566596] [2021-07-13 19:38:45,647 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 500 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 500 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:38:45,677 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-13 19:38:45,677 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:38:45,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 19:38:45,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:38:45,841 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:45,842 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:45,842 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:38:45,843 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:45,845 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:45,845 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:45,845 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:38:45,846 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:45,848 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:45,848 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:45,849 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:38:45,849 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:45,851 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:45,851 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:38:45,852 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:45,884 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-07-13 19:38:45,884 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:38:45,884 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:38:45,884 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-07-13 19:38:45,935 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:45,936 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1232566596] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:45,936 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:38:45,936 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-07-13 19:38:45,936 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245019141] [2021-07-13 19:38:45,936 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 19:38:45,936 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:45,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 19:38:45,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=405, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:38:45,936 INFO L87 Difference]: Start difference. First operand 2111 states and 6001 transitions. Second operand has 22 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 22 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:46,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:46,507 INFO L93 Difference]: Finished difference Result 2246 states and 6234 transitions. [2021-07-13 19:38:46,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-13 19:38:46,508 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 22 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:38:46,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:46,511 INFO L225 Difference]: With dead ends: 2246 [2021-07-13 19:38:46,511 INFO L226 Difference]: Without dead ends: 2246 [2021-07-13 19:38:46,511 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 568.1ms TimeCoverageRelationStatistics Valid=141, Invalid=981, Unknown=0, NotChecked=0, Total=1122 [2021-07-13 19:38:46,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2246 states. [2021-07-13 19:38:46,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2246 to 2106. [2021-07-13 19:38:46,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2106 states, 2105 states have (on average 2.841330166270784) internal successors, (5981), 2105 states have internal predecessors, (5981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:46,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2106 states to 2106 states and 5981 transitions. [2021-07-13 19:38:46,537 INFO L78 Accepts]: Start accepts. Automaton has 2106 states and 5981 transitions. Word has length 19 [2021-07-13 19:38:46,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:46,537 INFO L482 AbstractCegarLoop]: Abstraction has 2106 states and 5981 transitions. [2021-07-13 19:38:46,537 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 22 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:46,537 INFO L276 IsEmpty]: Start isEmpty. Operand 2106 states and 5981 transitions. [2021-07-13 19:38:46,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:38:46,540 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:46,540 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:46,740 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4004,500 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:38:46,740 INFO L430 AbstractCegarLoop]: === Iteration 510 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:46,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:46,740 INFO L82 PathProgramCache]: Analyzing trace with hash -498425602, now seen corresponding path program 496 times [2021-07-13 19:38:46,740 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:46,740 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135628010] [2021-07-13 19:38:46,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:46,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:46,848 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:46,848 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:46,848 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135628010] [2021-07-13 19:38:46,848 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [135628010] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:46,848 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [247557779] [2021-07-13 19:38:46,848 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 501 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 501 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:38:46,876 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:38:46,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:38:46,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 19:38:46,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:38:47,067 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:47,068 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:47,068 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:38:47,069 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:47,071 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:47,071 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:38:47,072 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:47,093 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-07-13 19:38:47,093 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:38:47,094 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:38:47,094 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-07-13 19:38:47,115 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:47,115 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [247557779] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:47,115 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:38:47,115 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-07-13 19:38:47,115 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259573999] [2021-07-13 19:38:47,115 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 19:38:47,115 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:47,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 19:38:47,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=405, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:38:47,116 INFO L87 Difference]: Start difference. First operand 2106 states and 5981 transitions. Second operand has 22 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 22 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:47,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:47,983 INFO L93 Difference]: Finished difference Result 2384 states and 6529 transitions. [2021-07-13 19:38:47,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-07-13 19:38:47,984 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 22 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:38:47,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:47,987 INFO L225 Difference]: With dead ends: 2384 [2021-07-13 19:38:47,987 INFO L226 Difference]: Without dead ends: 2384 [2021-07-13 19:38:47,987 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 529 ImplicationChecksByTransitivity, 725.6ms TimeCoverageRelationStatistics Valid=221, Invalid=1849, Unknown=0, NotChecked=0, Total=2070 [2021-07-13 19:38:47,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2384 states. [2021-07-13 19:38:48,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2384 to 2130. [2021-07-13 19:38:48,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2130 states, 2129 states have (on average 2.8511038046031) internal successors, (6070), 2129 states have internal predecessors, (6070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:48,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2130 states to 2130 states and 6070 transitions. [2021-07-13 19:38:48,020 INFO L78 Accepts]: Start accepts. Automaton has 2130 states and 6070 transitions. Word has length 19 [2021-07-13 19:38:48,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:48,020 INFO L482 AbstractCegarLoop]: Abstraction has 2130 states and 6070 transitions. [2021-07-13 19:38:48,020 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 22 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:48,020 INFO L276 IsEmpty]: Start isEmpty. Operand 2130 states and 6070 transitions. [2021-07-13 19:38:48,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:38:48,022 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:48,022 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:48,222 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4008,501 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:38:48,223 INFO L430 AbstractCegarLoop]: === Iteration 511 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:48,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:48,223 INFO L82 PathProgramCache]: Analyzing trace with hash -1987830598, now seen corresponding path program 497 times [2021-07-13 19:38:48,223 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:48,223 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006058967] [2021-07-13 19:38:48,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:48,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:48,349 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:48,349 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:48,349 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006058967] [2021-07-13 19:38:48,349 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1006058967] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:48,349 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1125237102] [2021-07-13 19:38:48,349 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 502 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 502 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:38:48,379 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:38:48,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:38:48,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 19:38:48,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:38:48,580 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:48,581 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:48,581 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:38:48,581 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:48,584 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:48,584 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:38:48,584 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:48,606 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-07-13 19:38:48,606 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:38:48,607 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:38:48,607 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-07-13 19:38:48,629 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:48,629 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1125237102] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:48,629 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:38:48,629 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-07-13 19:38:48,629 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238635863] [2021-07-13 19:38:48,629 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 19:38:48,629 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:48,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 19:38:48,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=407, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:38:48,629 INFO L87 Difference]: Start difference. First operand 2130 states and 6070 transitions. Second operand has 22 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 22 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:50,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:50,464 INFO L93 Difference]: Finished difference Result 2569 states and 6877 transitions. [2021-07-13 19:38:50,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-07-13 19:38:50,464 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 22 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:38:50,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:50,467 INFO L225 Difference]: With dead ends: 2569 [2021-07-13 19:38:50,467 INFO L226 Difference]: Without dead ends: 2569 [2021-07-13 19:38:50,468 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1607 ImplicationChecksByTransitivity, 1430.6ms TimeCoverageRelationStatistics Valid=483, Invalid=4629, Unknown=0, NotChecked=0, Total=5112 [2021-07-13 19:38:50,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2569 states. [2021-07-13 19:38:50,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2569 to 2123. [2021-07-13 19:38:50,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2123 states, 2122 states have (on average 2.8482563619227146) internal successors, (6044), 2122 states have internal predecessors, (6044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:50,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2123 states to 2123 states and 6044 transitions. [2021-07-13 19:38:50,494 INFO L78 Accepts]: Start accepts. Automaton has 2123 states and 6044 transitions. Word has length 19 [2021-07-13 19:38:50,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:50,494 INFO L482 AbstractCegarLoop]: Abstraction has 2123 states and 6044 transitions. [2021-07-13 19:38:50,494 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 22 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:50,494 INFO L276 IsEmpty]: Start isEmpty. Operand 2123 states and 6044 transitions. [2021-07-13 19:38:50,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:38:50,496 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:50,497 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:50,697 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 502 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4011 [2021-07-13 19:38:50,697 INFO L430 AbstractCegarLoop]: === Iteration 512 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:50,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:50,697 INFO L82 PathProgramCache]: Analyzing trace with hash -914745218, now seen corresponding path program 498 times [2021-07-13 19:38:50,697 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:50,698 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936140527] [2021-07-13 19:38:50,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:50,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:50,802 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:50,802 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:50,802 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936140527] [2021-07-13 19:38:50,802 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936140527] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:50,802 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [70898936] [2021-07-13 19:38:50,802 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 503 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 503 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:38:50,831 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:38:50,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:38:50,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 19:38:50,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:38:51,017 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:51,017 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:51,018 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:38:51,018 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:51,020 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:51,021 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:38:51,021 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:51,043 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-07-13 19:38:51,043 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:38:51,044 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:38:51,044 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-07-13 19:38:51,067 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:51,067 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [70898936] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:51,067 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:38:51,067 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-07-13 19:38:51,067 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299177290] [2021-07-13 19:38:51,067 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 19:38:51,067 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:51,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 19:38:51,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=409, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:38:51,068 INFO L87 Difference]: Start difference. First operand 2123 states and 6044 transitions. Second operand has 22 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 22 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:53,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:53,675 INFO L93 Difference]: Finished difference Result 2444 states and 6649 transitions. [2021-07-13 19:38:53,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-07-13 19:38:53,675 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 22 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:38:53,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:53,678 INFO L225 Difference]: With dead ends: 2444 [2021-07-13 19:38:53,678 INFO L226 Difference]: Without dead ends: 2444 [2021-07-13 19:38:53,679 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2471 ImplicationChecksByTransitivity, 2078.5ms TimeCoverageRelationStatistics Valid=761, Invalid=6895, Unknown=0, NotChecked=0, Total=7656 [2021-07-13 19:38:53,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2444 states. [2021-07-13 19:38:53,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2444 to 2101. [2021-07-13 19:38:53,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2101 states, 2100 states have (on average 2.840952380952381) internal successors, (5966), 2100 states have internal predecessors, (5966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:53,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2101 states to 2101 states and 5966 transitions. [2021-07-13 19:38:53,708 INFO L78 Accepts]: Start accepts. Automaton has 2101 states and 5966 transitions. Word has length 19 [2021-07-13 19:38:53,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:53,708 INFO L482 AbstractCegarLoop]: Abstraction has 2101 states and 5966 transitions. [2021-07-13 19:38:53,708 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 22 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:53,708 INFO L276 IsEmpty]: Start isEmpty. Operand 2101 states and 5966 transitions. [2021-07-13 19:38:53,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:38:53,710 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:53,710 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:53,911 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4014,503 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:38:53,911 INFO L430 AbstractCegarLoop]: === Iteration 513 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:53,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:53,911 INFO L82 PathProgramCache]: Analyzing trace with hash -2008836806, now seen corresponding path program 499 times [2021-07-13 19:38:53,911 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:53,911 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262973182] [2021-07-13 19:38:53,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:53,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:54,020 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:54,020 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:54,021 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262973182] [2021-07-13 19:38:54,021 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [262973182] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:54,021 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2080558555] [2021-07-13 19:38:54,021 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 504 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 504 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:38:54,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:54,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 19:38:54,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:38:54,258 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:54,259 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:54,259 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:38:54,260 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:54,262 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:54,262 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:38:54,263 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:54,284 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-07-13 19:38:54,285 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:38:54,285 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:38:54,285 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-07-13 19:38:54,309 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:54,309 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2080558555] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:54,309 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:38:54,309 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-07-13 19:38:54,309 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101897842] [2021-07-13 19:38:54,309 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 19:38:54,309 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:54,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 19:38:54,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=411, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:38:54,310 INFO L87 Difference]: Start difference. First operand 2101 states and 5966 transitions. Second operand has 22 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 22 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:54,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:54,618 INFO L93 Difference]: Finished difference Result 2165 states and 6085 transitions. [2021-07-13 19:38:54,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 19:38:54,619 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 22 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:38:54,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:54,621 INFO L225 Difference]: With dead ends: 2165 [2021-07-13 19:38:54,621 INFO L226 Difference]: Without dead ends: 2165 [2021-07-13 19:38:54,622 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 256.4ms TimeCoverageRelationStatistics Valid=51, Invalid=411, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:38:54,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2165 states. [2021-07-13 19:38:54,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2165 to 2101. [2021-07-13 19:38:54,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2101 states, 2100 states have (on average 2.840952380952381) internal successors, (5966), 2100 states have internal predecessors, (5966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:54,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2101 states to 2101 states and 5966 transitions. [2021-07-13 19:38:54,644 INFO L78 Accepts]: Start accepts. Automaton has 2101 states and 5966 transitions. Word has length 19 [2021-07-13 19:38:54,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:54,644 INFO L482 AbstractCegarLoop]: Abstraction has 2101 states and 5966 transitions. [2021-07-13 19:38:54,644 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 22 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:54,645 INFO L276 IsEmpty]: Start isEmpty. Operand 2101 states and 5966 transitions. [2021-07-13 19:38:54,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:38:54,647 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:54,647 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:54,847 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4017,504 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:38:54,847 INFO L430 AbstractCegarLoop]: === Iteration 514 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:54,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:54,847 INFO L82 PathProgramCache]: Analyzing trace with hash 716334810, now seen corresponding path program 500 times [2021-07-13 19:38:54,848 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:54,848 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166370300] [2021-07-13 19:38:54,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:54,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:54,950 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:54,950 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:54,950 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166370300] [2021-07-13 19:38:54,951 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [166370300] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:54,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1587672769] [2021-07-13 19:38:54,951 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 505 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 505 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:38:54,978 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:38:54,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:38:54,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 19:38:54,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:38:55,163 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:55,164 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:55,164 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:38:55,165 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:55,167 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:55,167 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:38:55,168 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:55,186 INFO L628 ElimStorePlain]: treesize reduction 30, result has 33.3 percent of original size [2021-07-13 19:38:55,187 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:38:55,187 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:38:55,187 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:59, output treesize:15 [2021-07-13 19:38:55,215 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:55,216 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1587672769] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:55,216 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:38:55,216 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-07-13 19:38:55,216 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541596428] [2021-07-13 19:38:55,216 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 19:38:55,216 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:55,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 19:38:55,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=447, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:38:55,216 INFO L87 Difference]: Start difference. First operand 2101 states and 5966 transitions. Second operand has 23 states, 23 states have (on average 1.3478260869565217) internal successors, (31), 23 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:55,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:55,559 INFO L93 Difference]: Finished difference Result 2318 states and 6445 transitions. [2021-07-13 19:38:55,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 19:38:55,559 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.3478260869565217) internal successors, (31), 23 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:38:55,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:55,562 INFO L225 Difference]: With dead ends: 2318 [2021-07-13 19:38:55,563 INFO L226 Difference]: Without dead ends: 2318 [2021-07-13 19:38:55,563 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 272.5ms TimeCoverageRelationStatistics Valid=59, Invalid=447, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:38:55,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2318 states. [2021-07-13 19:38:55,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2318 to 2194. [2021-07-13 19:38:55,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2194 states, 2193 states have (on average 2.8568171454628364) internal successors, (6265), 2193 states have internal predecessors, (6265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:55,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2194 states to 2194 states and 6265 transitions. [2021-07-13 19:38:55,590 INFO L78 Accepts]: Start accepts. Automaton has 2194 states and 6265 transitions. Word has length 19 [2021-07-13 19:38:55,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:55,590 INFO L482 AbstractCegarLoop]: Abstraction has 2194 states and 6265 transitions. [2021-07-13 19:38:55,590 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.3478260869565217) internal successors, (31), 23 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:55,590 INFO L276 IsEmpty]: Start isEmpty. Operand 2194 states and 6265 transitions. [2021-07-13 19:38:55,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:38:55,592 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:55,592 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:55,792 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 505 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4020 [2021-07-13 19:38:55,793 INFO L430 AbstractCegarLoop]: === Iteration 515 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:55,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:55,793 INFO L82 PathProgramCache]: Analyzing trace with hash -491076034, now seen corresponding path program 501 times [2021-07-13 19:38:55,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:55,793 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62842719] [2021-07-13 19:38:55,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:55,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:55,896 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:55,896 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:55,896 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62842719] [2021-07-13 19:38:55,896 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62842719] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:55,896 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [712539097] [2021-07-13 19:38:55,896 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 506 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 506 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:38:55,925 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 19:38:55,925 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:38:55,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 19:38:55,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:38:56,110 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:56,111 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:56,111 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:38:56,112 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:56,122 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:56,123 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:56,123 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:38:56,124 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:56,126 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:38:56,126 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:56,128 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:38:56,129 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:56,131 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:38:56,132 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:56,133 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:38:56,134 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:56,161 INFO L628 ElimStorePlain]: treesize reduction 21, result has 58.0 percent of original size [2021-07-13 19:38:56,161 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:38:56,161 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:38:56,161 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 2 variables, input treesize:125, output treesize:29 [2021-07-13 19:38:56,196 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:56,196 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [712539097] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:56,196 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:38:56,196 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-07-13 19:38:56,196 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225043128] [2021-07-13 19:38:56,196 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 19:38:56,196 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:56,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 19:38:56,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=447, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:38:56,197 INFO L87 Difference]: Start difference. First operand 2194 states and 6265 transitions. Second operand has 23 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 23 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:56,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:56,822 INFO L93 Difference]: Finished difference Result 2298 states and 6393 transitions. [2021-07-13 19:38:56,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-13 19:38:56,823 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 23 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:38:56,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:56,826 INFO L225 Difference]: With dead ends: 2298 [2021-07-13 19:38:56,826 INFO L226 Difference]: Without dead ends: 2288 [2021-07-13 19:38:56,826 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 526.0ms TimeCoverageRelationStatistics Valid=137, Invalid=1345, Unknown=0, NotChecked=0, Total=1482 [2021-07-13 19:38:56,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2288 states. [2021-07-13 19:38:56,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2288 to 2205. [2021-07-13 19:38:56,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2205 states, 2204 states have (on average 2.8484573502722323) internal successors, (6278), 2204 states have internal predecessors, (6278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:56,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2205 states to 2205 states and 6278 transitions. [2021-07-13 19:38:56,850 INFO L78 Accepts]: Start accepts. Automaton has 2205 states and 6278 transitions. Word has length 19 [2021-07-13 19:38:56,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:56,850 INFO L482 AbstractCegarLoop]: Abstraction has 2205 states and 6278 transitions. [2021-07-13 19:38:56,850 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 23 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:56,850 INFO L276 IsEmpty]: Start isEmpty. Operand 2205 states and 6278 transitions. [2021-07-13 19:38:56,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:38:56,853 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:56,853 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:57,053 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 506 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4022 [2021-07-13 19:38:57,053 INFO L430 AbstractCegarLoop]: === Iteration 516 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:57,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:57,053 INFO L82 PathProgramCache]: Analyzing trace with hash -915612356, now seen corresponding path program 502 times [2021-07-13 19:38:57,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:57,053 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134372169] [2021-07-13 19:38:57,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:57,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:57,158 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:57,158 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:57,158 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134372169] [2021-07-13 19:38:57,158 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [134372169] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:57,158 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1483868341] [2021-07-13 19:38:57,158 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 507 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 507 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:38:57,186 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:38:57,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:38:57,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 19:38:57,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:38:57,377 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:57,377 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:57,377 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:38:57,378 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:57,380 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:57,380 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:38:57,381 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:57,398 INFO L628 ElimStorePlain]: treesize reduction 30, result has 33.3 percent of original size [2021-07-13 19:38:57,398 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:38:57,399 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:38:57,399 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:59, output treesize:15 [2021-07-13 19:38:57,424 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:57,424 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1483868341] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:57,424 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:38:57,424 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-07-13 19:38:57,424 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627759686] [2021-07-13 19:38:57,425 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 19:38:57,425 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:57,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 19:38:57,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=447, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:38:57,425 INFO L87 Difference]: Start difference. First operand 2205 states and 6278 transitions. Second operand has 23 states, 23 states have (on average 1.3478260869565217) internal successors, (31), 23 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:59,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:59,277 INFO L93 Difference]: Finished difference Result 2504 states and 6789 transitions. [2021-07-13 19:38:59,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-07-13 19:38:59,278 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.3478260869565217) internal successors, (31), 23 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:38:59,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:59,281 INFO L225 Difference]: With dead ends: 2504 [2021-07-13 19:38:59,281 INFO L226 Difference]: Without dead ends: 2504 [2021-07-13 19:38:59,281 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1414 ImplicationChecksByTransitivity, 1536.1ms TimeCoverageRelationStatistics Valid=505, Invalid=4325, Unknown=0, NotChecked=0, Total=4830 [2021-07-13 19:38:59,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2504 states. [2021-07-13 19:38:59,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2504 to 2206. [2021-07-13 19:38:59,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2206 states, 2205 states have (on average 2.852607709750567) internal successors, (6290), 2205 states have internal predecessors, (6290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:59,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2206 states to 2206 states and 6290 transitions. [2021-07-13 19:38:59,307 INFO L78 Accepts]: Start accepts. Automaton has 2206 states and 6290 transitions. Word has length 19 [2021-07-13 19:38:59,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:59,307 INFO L482 AbstractCegarLoop]: Abstraction has 2206 states and 6290 transitions. [2021-07-13 19:38:59,307 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.3478260869565217) internal successors, (31), 23 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:59,307 INFO L276 IsEmpty]: Start isEmpty. Operand 2206 states and 6290 transitions. [2021-07-13 19:38:59,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:38:59,309 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:59,309 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:59,510 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4027,507 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:38:59,510 INFO L430 AbstractCegarLoop]: === Iteration 517 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:59,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:59,510 INFO L82 PathProgramCache]: Analyzing trace with hash 15270232, now seen corresponding path program 503 times [2021-07-13 19:38:59,510 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:59,510 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518782731] [2021-07-13 19:38:59,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:59,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:59,621 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:59,621 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:59,621 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518782731] [2021-07-13 19:38:59,621 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [518782731] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:59,621 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1825566263] [2021-07-13 19:38:59,621 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 508 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 508 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:38:59,650 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:38:59,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:38:59,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 19:38:59,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:38:59,839 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:59,840 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:59,840 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:38:59,841 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:59,843 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:59,844 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:59,844 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:38:59,844 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:59,846 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:38:59,847 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:59,849 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:38:59,849 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:59,851 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:38:59,852 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:59,854 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:38:59,854 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:59,881 INFO L628 ElimStorePlain]: treesize reduction 21, result has 58.0 percent of original size [2021-07-13 19:38:59,881 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:38:59,881 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:38:59,882 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 2 variables, input treesize:125, output treesize:29 [2021-07-13 19:38:59,915 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:59,915 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1825566263] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:59,915 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:38:59,915 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-07-13 19:38:59,916 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561118898] [2021-07-13 19:38:59,916 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 19:38:59,916 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:59,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 19:38:59,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=447, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:38:59,916 INFO L87 Difference]: Start difference. First operand 2206 states and 6290 transitions. Second operand has 23 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 23 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:00,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:39:00,701 INFO L93 Difference]: Finished difference Result 2327 states and 6443 transitions. [2021-07-13 19:39:00,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-07-13 19:39:00,701 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 23 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:39:00,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:39:00,705 INFO L225 Difference]: With dead ends: 2327 [2021-07-13 19:39:00,705 INFO L226 Difference]: Without dead ends: 2319 [2021-07-13 19:39:00,705 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 508 ImplicationChecksByTransitivity, 721.1ms TimeCoverageRelationStatistics Valid=203, Invalid=1959, Unknown=0, NotChecked=0, Total=2162 [2021-07-13 19:39:00,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2319 states. [2021-07-13 19:39:00,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2319 to 2213. [2021-07-13 19:39:00,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2213 states, 2212 states have (on average 2.848101265822785) internal successors, (6300), 2212 states have internal predecessors, (6300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:00,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2213 states to 2213 states and 6300 transitions. [2021-07-13 19:39:00,730 INFO L78 Accepts]: Start accepts. Automaton has 2213 states and 6300 transitions. Word has length 19 [2021-07-13 19:39:00,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:39:00,730 INFO L482 AbstractCegarLoop]: Abstraction has 2213 states and 6300 transitions. [2021-07-13 19:39:00,730 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 23 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:00,730 INFO L276 IsEmpty]: Start isEmpty. Operand 2213 states and 6300 transitions. [2021-07-13 19:39:00,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:39:00,733 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:39:00,733 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:39:00,933 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4029,508 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:00,933 INFO L430 AbstractCegarLoop]: === Iteration 518 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:39:00,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:39:00,933 INFO L82 PathProgramCache]: Analyzing trace with hash -2076634470, now seen corresponding path program 504 times [2021-07-13 19:39:00,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:39:00,934 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703790527] [2021-07-13 19:39:00,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:39:00,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:01,036 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:01,037 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:39:01,037 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703790527] [2021-07-13 19:39:01,037 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [703790527] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:01,037 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1091173420] [2021-07-13 19:39:01,037 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 509 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 509 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:01,066 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:39:01,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:39:01,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 19:39:01,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:39:01,255 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:39:01,256 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:39:01,256 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:39:01,257 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:01,259 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:39:01,259 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:39:01,259 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:01,286 INFO L628 ElimStorePlain]: treesize reduction 30, result has 33.3 percent of original size [2021-07-13 19:39:01,287 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:39:01,287 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:39:01,287 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:59, output treesize:15 [2021-07-13 19:39:01,313 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:01,313 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1091173420] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:01,313 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:39:01,313 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-07-13 19:39:01,313 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764454258] [2021-07-13 19:39:01,314 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 19:39:01,314 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:39:01,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 19:39:01,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=446, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:39:01,314 INFO L87 Difference]: Start difference. First operand 2213 states and 6300 transitions. Second operand has 23 states, 23 states have (on average 1.3478260869565217) internal successors, (31), 23 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:03,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:39:03,587 INFO L93 Difference]: Finished difference Result 2633 states and 7053 transitions. [2021-07-13 19:39:03,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-07-13 19:39:03,587 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.3478260869565217) internal successors, (31), 23 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:39:03,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:39:03,591 INFO L225 Difference]: With dead ends: 2633 [2021-07-13 19:39:03,591 INFO L226 Difference]: Without dead ends: 2633 [2021-07-13 19:39:03,591 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1826 ImplicationChecksByTransitivity, 1645.8ms TimeCoverageRelationStatistics Valid=521, Invalid=5331, Unknown=0, NotChecked=0, Total=5852 [2021-07-13 19:39:03,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2633 states. [2021-07-13 19:39:03,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2633 to 2206. [2021-07-13 19:39:03,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2206 states, 2205 states have (on average 2.854421768707483) internal successors, (6294), 2205 states have internal predecessors, (6294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:03,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2206 states to 2206 states and 6294 transitions. [2021-07-13 19:39:03,624 INFO L78 Accepts]: Start accepts. Automaton has 2206 states and 6294 transitions. Word has length 19 [2021-07-13 19:39:03,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:39:03,624 INFO L482 AbstractCegarLoop]: Abstraction has 2206 states and 6294 transitions. [2021-07-13 19:39:03,624 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.3478260869565217) internal successors, (31), 23 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:03,624 INFO L276 IsEmpty]: Start isEmpty. Operand 2206 states and 6294 transitions. [2021-07-13 19:39:03,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:39:03,626 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:39:03,626 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:39:03,827 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 509 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4034 [2021-07-13 19:39:03,827 INFO L430 AbstractCegarLoop]: === Iteration 519 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:39:03,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:39:03,827 INFO L82 PathProgramCache]: Analyzing trace with hash -522585346, now seen corresponding path program 505 times [2021-07-13 19:39:03,827 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:39:03,827 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601892107] [2021-07-13 19:39:03,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:39:03,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:03,941 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:03,941 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:39:03,941 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601892107] [2021-07-13 19:39:03,941 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [601892107] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:03,941 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1251370552] [2021-07-13 19:39:03,941 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 510 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 510 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:03,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:03,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 19:39:03,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:39:04,170 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:39:04,170 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:39:04,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:39:04,171 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:04,174 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:39:04,174 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:39:04,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:39:04,175 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:04,177 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:39:04,177 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:04,179 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:39:04,180 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:04,182 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:39:04,183 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:04,184 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:39:04,185 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:04,212 INFO L628 ElimStorePlain]: treesize reduction 21, result has 58.0 percent of original size [2021-07-13 19:39:04,212 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:39:04,212 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:39:04,212 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 2 variables, input treesize:125, output treesize:29 [2021-07-13 19:39:04,246 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:04,247 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1251370552] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:04,247 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:39:04,247 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-07-13 19:39:04,247 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804127996] [2021-07-13 19:39:04,247 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 19:39:04,247 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:39:04,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 19:39:04,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=446, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:39:04,247 INFO L87 Difference]: Start difference. First operand 2206 states and 6294 transitions. Second operand has 23 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 23 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:05,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:39:05,014 INFO L93 Difference]: Finished difference Result 2308 states and 6426 transitions. [2021-07-13 19:39:05,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-13 19:39:05,014 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 23 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:39:05,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:39:05,017 INFO L225 Difference]: With dead ends: 2308 [2021-07-13 19:39:05,017 INFO L226 Difference]: Without dead ends: 2299 [2021-07-13 19:39:05,018 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 422 ImplicationChecksByTransitivity, 714.6ms TimeCoverageRelationStatistics Valid=190, Invalid=1702, Unknown=0, NotChecked=0, Total=1892 [2021-07-13 19:39:05,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2299 states. [2021-07-13 19:39:05,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2299 to 2209. [2021-07-13 19:39:05,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2209 states, 2208 states have (on average 2.8496376811594204) internal successors, (6292), 2208 states have internal predecessors, (6292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:05,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2209 states to 2209 states and 6292 transitions. [2021-07-13 19:39:05,042 INFO L78 Accepts]: Start accepts. Automaton has 2209 states and 6292 transitions. Word has length 19 [2021-07-13 19:39:05,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:39:05,043 INFO L482 AbstractCegarLoop]: Abstraction has 2209 states and 6292 transitions. [2021-07-13 19:39:05,043 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 23 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:05,043 INFO L276 IsEmpty]: Start isEmpty. Operand 2209 states and 6292 transitions. [2021-07-13 19:39:05,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:39:05,045 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:39:05,045 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:39:05,245 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4036,510 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:05,246 INFO L430 AbstractCegarLoop]: === Iteration 520 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:39:05,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:39:05,246 INFO L82 PathProgramCache]: Analyzing trace with hash -1836992132, now seen corresponding path program 506 times [2021-07-13 19:39:05,246 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:39:05,246 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966393627] [2021-07-13 19:39:05,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:39:05,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:05,361 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:05,362 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:39:05,362 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966393627] [2021-07-13 19:39:05,362 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1966393627] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:05,362 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [179862748] [2021-07-13 19:39:05,362 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 511 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 511 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:05,390 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:39:05,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:39:05,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 19:39:05,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:39:05,593 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:39:05,593 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:39:05,593 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:39:05,594 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:05,596 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:39:05,596 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:39:05,597 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:05,615 INFO L628 ElimStorePlain]: treesize reduction 30, result has 33.3 percent of original size [2021-07-13 19:39:05,615 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:39:05,616 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:39:05,616 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:59, output treesize:15 [2021-07-13 19:39:05,642 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:05,642 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [179862748] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:05,642 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:39:05,642 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-07-13 19:39:05,642 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955956759] [2021-07-13 19:39:05,642 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 19:39:05,642 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:39:05,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 19:39:05,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:39:05,643 INFO L87 Difference]: Start difference. First operand 2209 states and 6292 transitions. Second operand has 23 states, 23 states have (on average 1.3478260869565217) internal successors, (31), 23 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:06,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:39:06,917 INFO L93 Difference]: Finished difference Result 2528 states and 6875 transitions. [2021-07-13 19:39:06,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-07-13 19:39:06,918 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.3478260869565217) internal successors, (31), 23 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:39:06,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:39:06,921 INFO L225 Difference]: With dead ends: 2528 [2021-07-13 19:39:06,921 INFO L226 Difference]: Without dead ends: 2528 [2021-07-13 19:39:06,921 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 822 ImplicationChecksByTransitivity, 1059.1ms TimeCoverageRelationStatistics Valid=308, Invalid=2772, Unknown=0, NotChecked=0, Total=3080 [2021-07-13 19:39:06,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2528 states. [2021-07-13 19:39:06,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2528 to 2210. [2021-07-13 19:39:06,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2210 states, 2209 states have (on average 2.8569488456315075) internal successors, (6311), 2209 states have internal predecessors, (6311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:06,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2210 states to 2210 states and 6311 transitions. [2021-07-13 19:39:06,947 INFO L78 Accepts]: Start accepts. Automaton has 2210 states and 6311 transitions. Word has length 19 [2021-07-13 19:39:06,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:39:06,947 INFO L482 AbstractCegarLoop]: Abstraction has 2210 states and 6311 transitions. [2021-07-13 19:39:06,947 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.3478260869565217) internal successors, (31), 23 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:06,947 INFO L276 IsEmpty]: Start isEmpty. Operand 2210 states and 6311 transitions. [2021-07-13 19:39:06,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:39:06,949 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:39:06,949 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:39:07,150 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4041,511 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:07,150 INFO L430 AbstractCegarLoop]: === Iteration 521 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:39:07,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:39:07,150 INFO L82 PathProgramCache]: Analyzing trace with hash 1538274456, now seen corresponding path program 507 times [2021-07-13 19:39:07,150 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:39:07,150 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527822633] [2021-07-13 19:39:07,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:39:07,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:07,273 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:07,273 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:39:07,273 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527822633] [2021-07-13 19:39:07,273 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1527822633] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:07,273 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [52818558] [2021-07-13 19:39:07,273 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 512 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 512 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:07,307 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:39:07,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:39:07,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 19:39:07,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:39:07,517 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:39:07,517 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:39:07,517 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:39:07,518 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:07,520 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:39:07,521 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:39:07,521 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:39:07,522 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:07,523 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:39:07,524 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:07,526 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:39:07,527 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:07,529 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:39:07,530 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:07,531 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:39:07,532 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:07,558 INFO L628 ElimStorePlain]: treesize reduction 21, result has 58.0 percent of original size [2021-07-13 19:39:07,559 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:39:07,559 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:39:07,559 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 2 variables, input treesize:125, output treesize:29 [2021-07-13 19:39:07,593 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:07,593 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [52818558] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:07,593 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:39:07,593 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-07-13 19:39:07,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941687714] [2021-07-13 19:39:07,594 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 19:39:07,594 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:39:07,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 19:39:07,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:39:07,594 INFO L87 Difference]: Start difference. First operand 2210 states and 6311 transitions. Second operand has 23 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 23 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:08,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:39:08,334 INFO L93 Difference]: Finished difference Result 2283 states and 6410 transitions. [2021-07-13 19:39:08,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-13 19:39:08,335 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 23 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:39:08,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:39:08,338 INFO L225 Difference]: With dead ends: 2283 [2021-07-13 19:39:08,338 INFO L226 Difference]: Without dead ends: 2277 [2021-07-13 19:39:08,338 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 366 ImplicationChecksByTransitivity, 715.3ms TimeCoverageRelationStatistics Valid=185, Invalid=1537, Unknown=0, NotChecked=0, Total=1722 [2021-07-13 19:39:08,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2277 states. [2021-07-13 19:39:08,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2277 to 2211. [2021-07-13 19:39:08,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2211 states, 2210 states have (on average 2.853393665158371) internal successors, (6306), 2210 states have internal predecessors, (6306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:08,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2211 states to 2211 states and 6306 transitions. [2021-07-13 19:39:08,369 INFO L78 Accepts]: Start accepts. Automaton has 2211 states and 6306 transitions. Word has length 19 [2021-07-13 19:39:08,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:39:08,369 INFO L482 AbstractCegarLoop]: Abstraction has 2211 states and 6306 transitions. [2021-07-13 19:39:08,369 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 23 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:08,369 INFO L276 IsEmpty]: Start isEmpty. Operand 2211 states and 6306 transitions. [2021-07-13 19:39:08,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:39:08,371 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:39:08,371 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:39:08,572 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 512 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4043 [2021-07-13 19:39:08,572 INFO L430 AbstractCegarLoop]: === Iteration 522 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:39:08,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:39:08,572 INFO L82 PathProgramCache]: Analyzing trace with hash -1829261734, now seen corresponding path program 508 times [2021-07-13 19:39:08,572 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:39:08,573 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789443774] [2021-07-13 19:39:08,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:39:08,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:08,696 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:08,696 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:39:08,696 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789443774] [2021-07-13 19:39:08,696 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [789443774] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:08,696 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [255892823] [2021-07-13 19:39:08,696 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 513 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 513 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:08,724 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:39:08,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:39:08,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 19:39:08,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:39:08,899 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:39:08,900 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:39:08,900 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:39:08,901 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:08,903 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:39:08,903 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:39:08,903 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:39:08,904 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:08,906 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:39:08,907 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:39:08,907 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:39:08,907 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:08,909 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:39:08,910 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:39:08,910 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:08,942 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-07-13 19:39:08,942 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:39:08,943 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:39:08,943 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-07-13 19:39:09,002 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:09,003 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [255892823] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:09,003 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:39:09,003 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-07-13 19:39:09,003 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319303797] [2021-07-13 19:39:09,003 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 19:39:09,003 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:39:09,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 19:39:09,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:39:09,003 INFO L87 Difference]: Start difference. First operand 2211 states and 6306 transitions. Second operand has 23 states, 23 states have (on average 1.3478260869565217) internal successors, (31), 23 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:09,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:39:09,838 INFO L93 Difference]: Finished difference Result 2461 states and 6686 transitions. [2021-07-13 19:39:09,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-13 19:39:09,838 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.3478260869565217) internal successors, (31), 23 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:39:09,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:39:09,842 INFO L225 Difference]: With dead ends: 2461 [2021-07-13 19:39:09,842 INFO L226 Difference]: Without dead ends: 2461 [2021-07-13 19:39:09,842 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 724.2ms TimeCoverageRelationStatistics Valid=185, Invalid=1375, Unknown=0, NotChecked=0, Total=1560 [2021-07-13 19:39:09,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2461 states. [2021-07-13 19:39:09,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2461 to 2196. [2021-07-13 19:39:09,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2196 states, 2195 states have (on average 2.849658314350797) internal successors, (6255), 2195 states have internal predecessors, (6255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:09,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2196 states to 2196 states and 6255 transitions. [2021-07-13 19:39:09,867 INFO L78 Accepts]: Start accepts. Automaton has 2196 states and 6255 transitions. Word has length 19 [2021-07-13 19:39:09,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:39:09,867 INFO L482 AbstractCegarLoop]: Abstraction has 2196 states and 6255 transitions. [2021-07-13 19:39:09,867 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.3478260869565217) internal successors, (31), 23 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:09,867 INFO L276 IsEmpty]: Start isEmpty. Operand 2196 states and 6255 transitions. [2021-07-13 19:39:09,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:39:09,869 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:39:09,869 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:39:10,070 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4048,513 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:10,070 INFO L430 AbstractCegarLoop]: === Iteration 523 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:39:10,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:39:10,070 INFO L82 PathProgramCache]: Analyzing trace with hash -1027645506, now seen corresponding path program 509 times [2021-07-13 19:39:10,070 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:39:10,070 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359349888] [2021-07-13 19:39:10,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:39:10,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:10,194 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:10,195 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:39:10,195 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359349888] [2021-07-13 19:39:10,195 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [359349888] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:10,195 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [152383475] [2021-07-13 19:39:10,195 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 514 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 514 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:10,224 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:39:10,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:39:10,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 19:39:10,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:39:10,404 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:39:10,404 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:39:10,404 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:39:10,405 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:10,407 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:39:10,408 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:39:10,408 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:39:10,409 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:10,411 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:39:10,411 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:39:10,411 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:39:10,412 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:10,414 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:39:10,414 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:39:10,415 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:10,447 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-07-13 19:39:10,447 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:39:10,448 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:39:10,448 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-07-13 19:39:10,523 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:10,523 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [152383475] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:10,524 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:39:10,524 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-07-13 19:39:10,524 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725709893] [2021-07-13 19:39:10,524 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 19:39:10,524 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:39:10,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 19:39:10,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:39:10,524 INFO L87 Difference]: Start difference. First operand 2196 states and 6255 transitions. Second operand has 23 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 23 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:11,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:39:11,268 INFO L93 Difference]: Finished difference Result 2306 states and 6441 transitions. [2021-07-13 19:39:11,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-13 19:39:11,269 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 23 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:39:11,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:39:11,272 INFO L225 Difference]: With dead ends: 2306 [2021-07-13 19:39:11,272 INFO L226 Difference]: Without dead ends: 2301 [2021-07-13 19:39:11,272 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 316 ImplicationChecksByTransitivity, 742.5ms TimeCoverageRelationStatistics Valid=184, Invalid=1376, Unknown=0, NotChecked=0, Total=1560 [2021-07-13 19:39:11,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2301 states. [2021-07-13 19:39:11,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2301 to 2201. [2021-07-13 19:39:11,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2201 states, 2200 states have (on average 2.8495454545454546) internal successors, (6269), 2200 states have internal predecessors, (6269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:11,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2201 states to 2201 states and 6269 transitions. [2021-07-13 19:39:11,297 INFO L78 Accepts]: Start accepts. Automaton has 2201 states and 6269 transitions. Word has length 19 [2021-07-13 19:39:11,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:39:11,297 INFO L482 AbstractCegarLoop]: Abstraction has 2201 states and 6269 transitions. [2021-07-13 19:39:11,297 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 23 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:11,297 INFO L276 IsEmpty]: Start isEmpty. Operand 2201 states and 6269 transitions. [2021-07-13 19:39:11,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:39:11,299 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:39:11,299 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:39:11,500 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4052,514 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:11,500 INFO L430 AbstractCegarLoop]: === Iteration 524 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:39:11,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:39:11,500 INFO L82 PathProgramCache]: Analyzing trace with hash 690698200, now seen corresponding path program 510 times [2021-07-13 19:39:11,500 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:39:11,500 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742571923] [2021-07-13 19:39:11,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:39:11,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:11,616 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:11,616 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:39:11,616 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742571923] [2021-07-13 19:39:11,616 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742571923] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:11,616 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1380761081] [2021-07-13 19:39:11,617 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 515 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 515 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:11,645 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:39:11,645 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:39:11,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 19:39:11,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:39:11,820 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:39:11,820 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:39:11,821 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:39:11,821 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:11,824 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:39:11,824 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:39:11,824 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:39:11,825 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:11,827 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:39:11,827 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:39:11,827 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:39:11,828 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:11,830 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:39:11,830 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:39:11,831 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:11,863 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-07-13 19:39:11,863 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:39:11,864 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:39:11,864 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-07-13 19:39:11,928 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:11,928 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1380761081] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:11,928 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:39:11,928 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-07-13 19:39:11,929 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768930891] [2021-07-13 19:39:11,929 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 19:39:11,929 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:39:11,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 19:39:11,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:39:11,929 INFO L87 Difference]: Start difference. First operand 2201 states and 6269 transitions. Second operand has 23 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 23 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:12,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:39:12,418 INFO L93 Difference]: Finished difference Result 2295 states and 6427 transitions. [2021-07-13 19:39:12,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 19:39:12,418 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 23 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:39:12,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:39:12,421 INFO L225 Difference]: With dead ends: 2295 [2021-07-13 19:39:12,421 INFO L226 Difference]: Without dead ends: 2295 [2021-07-13 19:39:12,422 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 534.9ms TimeCoverageRelationStatistics Valid=132, Invalid=924, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 19:39:12,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2295 states. [2021-07-13 19:39:12,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2295 to 2173. [2021-07-13 19:39:12,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2173 states, 2172 states have (on average 2.848987108655617) internal successors, (6188), 2172 states have internal predecessors, (6188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:12,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2173 states to 2173 states and 6188 transitions. [2021-07-13 19:39:12,446 INFO L78 Accepts]: Start accepts. Automaton has 2173 states and 6188 transitions. Word has length 19 [2021-07-13 19:39:12,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:39:12,446 INFO L482 AbstractCegarLoop]: Abstraction has 2173 states and 6188 transitions. [2021-07-13 19:39:12,446 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 23 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:12,446 INFO L276 IsEmpty]: Start isEmpty. Operand 2173 states and 6188 transitions. [2021-07-13 19:39:12,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:39:12,449 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:39:12,449 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:39:12,649 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 515 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4057 [2021-07-13 19:39:12,649 INFO L430 AbstractCegarLoop]: === Iteration 525 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:39:12,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:39:12,649 INFO L82 PathProgramCache]: Analyzing trace with hash 221158592, now seen corresponding path program 511 times [2021-07-13 19:39:12,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:39:12,649 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078358577] [2021-07-13 19:39:12,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:39:12,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:12,750 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:39:12,751 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:39:12,751 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078358577] [2021-07-13 19:39:12,751 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1078358577] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:12,751 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [615080048] [2021-07-13 19:39:12,751 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 516 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 516 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:12,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:12,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 19:39:12,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:39:12,940 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:39:12,940 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:39:12,941 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:39:12,942 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:12,944 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:39:12,944 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:39:12,944 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:39:12,945 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:12,947 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:39:12,947 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:39:12,948 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:39:12,948 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:12,950 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:39:12,951 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:39:12,951 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:12,984 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-07-13 19:39:12,984 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:39:12,984 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:39:12,985 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-07-13 19:39:13,055 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:13,056 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [615080048] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:13,056 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:39:13,056 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-07-13 19:39:13,056 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172684091] [2021-07-13 19:39:13,056 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 19:39:13,056 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:39:13,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 19:39:13,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:39:13,056 INFO L87 Difference]: Start difference. First operand 2173 states and 6188 transitions. Second operand has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:13,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:39:13,917 INFO L93 Difference]: Finished difference Result 2219 states and 6277 transitions. [2021-07-13 19:39:13,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-13 19:39:13,917 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:39:13,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:39:13,920 INFO L225 Difference]: With dead ends: 2219 [2021-07-13 19:39:13,920 INFO L226 Difference]: Without dead ends: 2215 [2021-07-13 19:39:13,921 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 404 ImplicationChecksByTransitivity, 772.6ms TimeCoverageRelationStatistics Valid=197, Invalid=1609, Unknown=0, NotChecked=0, Total=1806 [2021-07-13 19:39:13,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2215 states. [2021-07-13 19:39:13,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2215 to 2177. [2021-07-13 19:39:13,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2177 states, 2176 states have (on average 2.846966911764706) internal successors, (6195), 2176 states have internal predecessors, (6195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:13,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2177 states to 2177 states and 6195 transitions. [2021-07-13 19:39:13,944 INFO L78 Accepts]: Start accepts. Automaton has 2177 states and 6195 transitions. Word has length 19 [2021-07-13 19:39:13,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:39:13,944 INFO L482 AbstractCegarLoop]: Abstraction has 2177 states and 6195 transitions. [2021-07-13 19:39:13,944 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:13,944 INFO L276 IsEmpty]: Start isEmpty. Operand 2177 states and 6195 transitions. [2021-07-13 19:39:13,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:39:13,946 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:39:13,946 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:39:14,146 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4061,516 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:14,146 INFO L430 AbstractCegarLoop]: === Iteration 526 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:39:14,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:39:14,147 INFO L82 PathProgramCache]: Analyzing trace with hash 1398193498, now seen corresponding path program 512 times [2021-07-13 19:39:14,147 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:39:14,147 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328674883] [2021-07-13 19:39:14,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:39:14,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:14,223 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:14,223 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:39:14,223 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328674883] [2021-07-13 19:39:14,223 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1328674883] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:14,223 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [216510766] [2021-07-13 19:39:14,223 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 517 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 517 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:14,251 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:39:14,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:39:14,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 19:39:14,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:39:14,389 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:39:14,389 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:39:14,389 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:39:14,390 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:14,392 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:39:14,393 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:39:14,393 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:39:14,394 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:14,396 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:39:14,396 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:39:14,396 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:39:14,397 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:14,399 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:39:14,399 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:39:14,400 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:14,432 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-07-13 19:39:14,433 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:39:14,433 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:39:14,433 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-07-13 19:39:14,484 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:14,484 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [216510766] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:14,484 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:39:14,484 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 20 [2021-07-13 19:39:14,484 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901439693] [2021-07-13 19:39:14,485 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 19:39:14,485 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:39:14,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 19:39:14,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:39:14,485 INFO L87 Difference]: Start difference. First operand 2177 states and 6195 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:14,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:39:14,966 INFO L93 Difference]: Finished difference Result 2423 states and 6683 transitions. [2021-07-13 19:39:14,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 19:39:14,967 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:39:14,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:39:14,970 INFO L225 Difference]: With dead ends: 2423 [2021-07-13 19:39:14,970 INFO L226 Difference]: Without dead ends: 2423 [2021-07-13 19:39:14,971 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 389.9ms TimeCoverageRelationStatistics Valid=112, Invalid=700, Unknown=0, NotChecked=0, Total=812 [2021-07-13 19:39:14,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2423 states. [2021-07-13 19:39:14,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2423 to 2237. [2021-07-13 19:39:14,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2237 states, 2236 states have (on average 2.8564400715563507) internal successors, (6387), 2236 states have internal predecessors, (6387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:14,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2237 states to 2237 states and 6387 transitions. [2021-07-13 19:39:14,998 INFO L78 Accepts]: Start accepts. Automaton has 2237 states and 6387 transitions. Word has length 19 [2021-07-13 19:39:14,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:39:14,999 INFO L482 AbstractCegarLoop]: Abstraction has 2237 states and 6387 transitions. [2021-07-13 19:39:14,999 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:14,999 INFO L276 IsEmpty]: Start isEmpty. Operand 2237 states and 6387 transitions. [2021-07-13 19:39:15,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:39:15,001 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:39:15,001 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:39:15,201 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 517 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4067 [2021-07-13 19:39:15,202 INFO L430 AbstractCegarLoop]: === Iteration 527 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:39:15,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:39:15,202 INFO L82 PathProgramCache]: Analyzing trace with hash -2095157570, now seen corresponding path program 513 times [2021-07-13 19:39:15,202 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:39:15,202 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81915329] [2021-07-13 19:39:15,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:39:15,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:15,279 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:15,279 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:39:15,279 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81915329] [2021-07-13 19:39:15,279 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [81915329] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:15,279 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1632411132] [2021-07-13 19:39:15,279 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 518 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 518 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:15,309 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-13 19:39:15,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:39:15,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 19:39:15,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:39:15,438 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:39:15,439 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:39:15,439 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:39:15,440 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:15,442 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:39:15,443 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:39:15,443 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:39:15,443 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:15,446 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:39:15,446 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:39:15,446 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:39:15,447 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:15,449 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:39:15,449 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:39:15,450 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:15,492 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-07-13 19:39:15,492 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:39:15,493 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:39:15,493 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-07-13 19:39:15,562 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:15,562 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1632411132] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:15,562 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:39:15,562 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 20 [2021-07-13 19:39:15,563 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139875939] [2021-07-13 19:39:15,563 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 19:39:15,563 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:39:15,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 19:39:15,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:39:15,563 INFO L87 Difference]: Start difference. First operand 2237 states and 6387 transitions. Second operand has 20 states, 20 states have (on average 1.5) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:16,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:39:16,220 INFO L93 Difference]: Finished difference Result 2398 states and 6660 transitions. [2021-07-13 19:39:16,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-13 19:39:16,221 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.5) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:39:16,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:39:16,224 INFO L225 Difference]: With dead ends: 2398 [2021-07-13 19:39:16,224 INFO L226 Difference]: Without dead ends: 2393 [2021-07-13 19:39:16,224 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 536.5ms TimeCoverageRelationStatistics Valid=147, Invalid=1113, Unknown=0, NotChecked=0, Total=1260 [2021-07-13 19:39:16,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2393 states. [2021-07-13 19:39:16,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2393 to 2244. [2021-07-13 19:39:16,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2244 states, 2243 states have (on average 2.8586714222024074) internal successors, (6412), 2243 states have internal predecessors, (6412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:16,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2244 states to 2244 states and 6412 transitions. [2021-07-13 19:39:16,249 INFO L78 Accepts]: Start accepts. Automaton has 2244 states and 6412 transitions. Word has length 19 [2021-07-13 19:39:16,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:39:16,249 INFO L482 AbstractCegarLoop]: Abstraction has 2244 states and 6412 transitions. [2021-07-13 19:39:16,250 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.5) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:16,250 INFO L276 IsEmpty]: Start isEmpty. Operand 2244 states and 6412 transitions. [2021-07-13 19:39:16,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:39:16,252 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:39:16,252 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:39:16,452 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4071,518 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:16,452 INFO L430 AbstractCegarLoop]: === Iteration 528 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:39:16,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:39:16,453 INFO L82 PathProgramCache]: Analyzing trace with hash -376813864, now seen corresponding path program 514 times [2021-07-13 19:39:16,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:39:16,453 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225422219] [2021-07-13 19:39:16,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:39:16,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:16,544 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:16,544 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:39:16,544 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225422219] [2021-07-13 19:39:16,544 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1225422219] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:16,544 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2002771842] [2021-07-13 19:39:16,544 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 519 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 519 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:16,572 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:39:16,573 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:39:16,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 19:39:16,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:39:16,709 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:39:16,710 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:39:16,710 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:39:16,711 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:16,713 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:39:16,714 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:39:16,714 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:39:16,714 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:16,716 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:39:16,717 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:39:16,717 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:39:16,718 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:16,720 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:39:16,720 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:39:16,721 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:16,753 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-07-13 19:39:16,753 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:39:16,753 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:39:16,754 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-07-13 19:39:16,802 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:16,803 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2002771842] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:16,803 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:39:16,803 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 20 [2021-07-13 19:39:16,803 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570901591] [2021-07-13 19:39:16,803 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 19:39:16,803 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:39:16,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 19:39:16,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:39:16,803 INFO L87 Difference]: Start difference. First operand 2244 states and 6412 transitions. Second operand has 20 states, 20 states have (on average 1.5) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:17,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:39:17,165 INFO L93 Difference]: Finished difference Result 2365 states and 6618 transitions. [2021-07-13 19:39:17,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 19:39:17,165 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.5) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:39:17,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:39:17,169 INFO L225 Difference]: With dead ends: 2365 [2021-07-13 19:39:17,169 INFO L226 Difference]: Without dead ends: 2365 [2021-07-13 19:39:17,169 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 344.8ms TimeCoverageRelationStatistics Valid=89, Invalid=561, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:39:17,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2365 states. [2021-07-13 19:39:17,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2365 to 2237. [2021-07-13 19:39:17,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2237 states, 2236 states have (on average 2.855098389982111) internal successors, (6384), 2236 states have internal predecessors, (6384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:17,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2237 states to 2237 states and 6384 transitions. [2021-07-13 19:39:17,195 INFO L78 Accepts]: Start accepts. Automaton has 2237 states and 6384 transitions. Word has length 19 [2021-07-13 19:39:17,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:39:17,195 INFO L482 AbstractCegarLoop]: Abstraction has 2237 states and 6384 transitions. [2021-07-13 19:39:17,195 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.5) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:17,195 INFO L276 IsEmpty]: Start isEmpty. Operand 2237 states and 6384 transitions. [2021-07-13 19:39:17,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:39:17,198 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:39:17,198 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:39:17,398 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 519 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4076 [2021-07-13 19:39:17,398 INFO L430 AbstractCegarLoop]: === Iteration 529 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:39:17,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:39:17,398 INFO L82 PathProgramCache]: Analyzing trace with hash -2087427172, now seen corresponding path program 515 times [2021-07-13 19:39:17,398 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:39:17,399 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532218137] [2021-07-13 19:39:17,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:39:17,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:17,469 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:17,469 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:39:17,469 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532218137] [2021-07-13 19:39:17,469 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1532218137] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:17,469 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [215591861] [2021-07-13 19:39:17,469 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 520 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 520 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:17,499 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-13 19:39:17,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:39:17,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 19:39:17,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:39:17,655 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:39:17,656 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:39:17,656 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:39:17,657 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:17,659 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:39:17,659 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:39:17,660 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:17,682 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-07-13 19:39:17,682 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:39:17,682 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:39:17,683 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-07-13 19:39:17,703 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:17,703 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [215591861] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:17,703 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:39:17,703 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 20 [2021-07-13 19:39:17,703 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019158364] [2021-07-13 19:39:17,704 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 19:39:17,704 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:39:17,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 19:39:17,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:39:17,704 INFO L87 Difference]: Start difference. First operand 2237 states and 6384 transitions. Second operand has 20 states, 20 states have (on average 1.5) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:17,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:39:17,993 INFO L93 Difference]: Finished difference Result 2387 states and 6677 transitions. [2021-07-13 19:39:17,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 19:39:17,994 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.5) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:39:17,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:39:17,997 INFO L225 Difference]: With dead ends: 2387 [2021-07-13 19:39:17,997 INFO L226 Difference]: Without dead ends: 2387 [2021-07-13 19:39:17,997 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 197.6ms TimeCoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:39:17,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2387 states. [2021-07-13 19:39:18,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2387 to 2237. [2021-07-13 19:39:18,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2237 states, 2236 states have (on average 2.855098389982111) internal successors, (6384), 2236 states have internal predecessors, (6384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:18,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2237 states to 2237 states and 6384 transitions. [2021-07-13 19:39:18,021 INFO L78 Accepts]: Start accepts. Automaton has 2237 states and 6384 transitions. Word has length 19 [2021-07-13 19:39:18,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:39:18,021 INFO L482 AbstractCegarLoop]: Abstraction has 2237 states and 6384 transitions. [2021-07-13 19:39:18,021 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.5) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:18,021 INFO L276 IsEmpty]: Start isEmpty. Operand 2237 states and 6384 transitions. [2021-07-13 19:39:18,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:39:18,024 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:39:18,024 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:39:18,224 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4080,520 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:18,224 INFO L430 AbstractCegarLoop]: === Iteration 530 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:39:18,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:39:18,224 INFO L82 PathProgramCache]: Analyzing trace with hash -1382020, now seen corresponding path program 516 times [2021-07-13 19:39:18,224 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:39:18,224 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433382154] [2021-07-13 19:39:18,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:39:18,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:18,323 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 18 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:39:18,323 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:39:18,323 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433382154] [2021-07-13 19:39:18,323 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [433382154] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:18,323 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [714216219] [2021-07-13 19:39:18,324 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 521 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 521 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:18,358 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-13 19:39:18,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:39:18,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 19:39:18,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:39:18,511 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:39:18,512 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:39:18,512 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:39:18,513 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:18,515 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:39:18,516 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:39:18,516 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:39:18,516 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:18,519 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:39:18,519 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:39:18,519 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:39:18,520 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:18,522 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:39:18,522 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:39:18,523 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:18,555 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-07-13 19:39:18,556 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:39:18,556 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:39:18,556 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-07-13 19:39:18,619 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:18,620 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [714216219] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:18,620 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:39:18,620 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13] total 19 [2021-07-13 19:39:18,620 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663130758] [2021-07-13 19:39:18,620 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:39:18,620 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:39:18,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:39:18,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:39:18,620 INFO L87 Difference]: Start difference. First operand 2237 states and 6384 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:19,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:39:19,132 INFO L93 Difference]: Finished difference Result 2337 states and 6562 transitions. [2021-07-13 19:39:19,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-13 19:39:19,132 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:39:19,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:39:19,136 INFO L225 Difference]: With dead ends: 2337 [2021-07-13 19:39:19,136 INFO L226 Difference]: Without dead ends: 2333 [2021-07-13 19:39:19,136 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 471.3ms TimeCoverageRelationStatistics Valid=123, Invalid=807, Unknown=0, NotChecked=0, Total=930 [2021-07-13 19:39:19,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2333 states. [2021-07-13 19:39:19,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2333 to 2251. [2021-07-13 19:39:19,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2251 states, 2250 states have (on average 2.8537777777777777) internal successors, (6421), 2250 states have internal predecessors, (6421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:19,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2251 states to 2251 states and 6421 transitions. [2021-07-13 19:39:19,161 INFO L78 Accepts]: Start accepts. Automaton has 2251 states and 6421 transitions. Word has length 19 [2021-07-13 19:39:19,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:39:19,161 INFO L482 AbstractCegarLoop]: Abstraction has 2251 states and 6421 transitions. [2021-07-13 19:39:19,161 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:19,161 INFO L276 IsEmpty]: Start isEmpty. Operand 2251 states and 6421 transitions. [2021-07-13 19:39:19,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:39:19,163 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:39:19,164 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:39:19,364 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 521 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4083 [2021-07-13 19:39:19,364 INFO L430 AbstractCegarLoop]: === Iteration 531 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:39:19,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:39:19,364 INFO L82 PathProgramCache]: Analyzing trace with hash 1727665314, now seen corresponding path program 517 times [2021-07-13 19:39:19,364 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:39:19,364 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517492422] [2021-07-13 19:39:19,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:39:19,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:19,428 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 18 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:39:19,428 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:39:19,428 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517492422] [2021-07-13 19:39:19,428 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [517492422] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:19,428 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [177146616] [2021-07-13 19:39:19,428 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 522 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 522 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:19,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:19,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 19:39:19,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:39:19,626 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:39:19,627 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:19,630 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:39:19,630 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:19,633 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:39:19,633 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:39:19,633 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:39:19,634 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:19,636 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:39:19,637 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:19,639 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:39:19,640 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:19,642 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:39:19,642 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:39:19,643 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:19,672 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-07-13 19:39:19,672 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:39:19,673 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:39:19,673 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-07-13 19:39:19,699 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:19,699 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [177146616] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:19,699 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:39:19,700 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13] total 19 [2021-07-13 19:39:19,700 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353651823] [2021-07-13 19:39:19,700 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:39:19,700 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:39:19,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:39:19,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:39:19,700 INFO L87 Difference]: Start difference. First operand 2251 states and 6421 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:20,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:39:20,008 INFO L93 Difference]: Finished difference Result 2280 states and 6460 transitions. [2021-07-13 19:39:20,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 19:39:20,008 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:39:20,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:39:20,011 INFO L225 Difference]: With dead ends: 2280 [2021-07-13 19:39:20,011 INFO L226 Difference]: Without dead ends: 2272 [2021-07-13 19:39:20,012 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 320.3ms TimeCoverageRelationStatistics Valid=81, Invalid=569, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:39:20,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2272 states. [2021-07-13 19:39:20,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2272 to 2247. [2021-07-13 19:39:20,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2247 states, 2246 states have (on average 2.852626892252894) internal successors, (6407), 2246 states have internal predecessors, (6407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:20,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2247 states to 2247 states and 6407 transitions. [2021-07-13 19:39:20,036 INFO L78 Accepts]: Start accepts. Automaton has 2247 states and 6407 transitions. Word has length 19 [2021-07-13 19:39:20,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:39:20,036 INFO L482 AbstractCegarLoop]: Abstraction has 2247 states and 6407 transitions. [2021-07-13 19:39:20,036 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:20,036 INFO L276 IsEmpty]: Start isEmpty. Operand 2247 states and 6407 transitions. [2021-07-13 19:39:20,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:39:20,039 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:39:20,039 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:39:20,239 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 522 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4089 [2021-07-13 19:39:20,239 INFO L430 AbstractCegarLoop]: === Iteration 532 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:39:20,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:39:20,239 INFO L82 PathProgramCache]: Analyzing trace with hash -1095473608, now seen corresponding path program 518 times [2021-07-13 19:39:20,239 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:39:20,239 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243699437] [2021-07-13 19:39:20,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:39:20,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:20,328 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:39:20,328 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:39:20,328 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243699437] [2021-07-13 19:39:20,328 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [243699437] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:20,328 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [245869307] [2021-07-13 19:39:20,328 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 523 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 523 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:20,356 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:39:20,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:39:20,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 19:39:20,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:39:20,481 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:39:20,482 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:39:20,482 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:39:20,483 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:20,485 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:39:20,485 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:39:20,485 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:39:20,486 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:20,488 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:39:20,489 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:39:20,489 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:39:20,489 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:20,491 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:39:20,492 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:39:20,492 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:20,527 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-07-13 19:39:20,528 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:39:20,528 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:39:20,528 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-07-13 19:39:20,591 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:20,591 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [245869307] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:20,591 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:39:20,591 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 20 [2021-07-13 19:39:20,591 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681309052] [2021-07-13 19:39:20,592 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 19:39:20,592 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:39:20,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 19:39:20,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:39:20,592 INFO L87 Difference]: Start difference. First operand 2247 states and 6407 transitions. Second operand has 20 states, 20 states have (on average 1.5) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:21,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:39:21,094 INFO L93 Difference]: Finished difference Result 2328 states and 6530 transitions. [2021-07-13 19:39:21,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-13 19:39:21,094 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.5) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:39:21,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:39:21,097 INFO L225 Difference]: With dead ends: 2328 [2021-07-13 19:39:21,097 INFO L226 Difference]: Without dead ends: 2324 [2021-07-13 19:39:21,098 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 487.3ms TimeCoverageRelationStatistics Valid=132, Invalid=990, Unknown=0, NotChecked=0, Total=1122 [2021-07-13 19:39:21,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2324 states. [2021-07-13 19:39:21,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2324 to 2242. [2021-07-13 19:39:21,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2242 states, 2241 states have (on average 2.8500669344042837) internal successors, (6387), 2241 states have internal predecessors, (6387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:21,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2242 states to 2242 states and 6387 transitions. [2021-07-13 19:39:21,123 INFO L78 Accepts]: Start accepts. Automaton has 2242 states and 6387 transitions. Word has length 19 [2021-07-13 19:39:21,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:39:21,123 INFO L482 AbstractCegarLoop]: Abstraction has 2242 states and 6387 transitions. [2021-07-13 19:39:21,123 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.5) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:21,123 INFO L276 IsEmpty]: Start isEmpty. Operand 2242 states and 6387 transitions. [2021-07-13 19:39:21,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:39:21,125 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:39:21,125 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:39:21,325 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 523 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4096 [2021-07-13 19:39:21,326 INFO L430 AbstractCegarLoop]: === Iteration 533 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:39:21,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:39:21,326 INFO L82 PathProgramCache]: Analyzing trace with hash 633573726, now seen corresponding path program 519 times [2021-07-13 19:39:21,326 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:39:21,326 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325416794] [2021-07-13 19:39:21,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:39:21,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:21,398 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:39:21,398 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:39:21,398 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325416794] [2021-07-13 19:39:21,398 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1325416794] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:21,398 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [575290014] [2021-07-13 19:39:21,398 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 524 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 524 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:21,427 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-13 19:39:21,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:39:21,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 19:39:21,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:39:21,611 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:39:21,612 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:21,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:39:21,615 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:21,618 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:39:21,618 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:39:21,618 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:39:21,619 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:21,621 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:39:21,622 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:21,624 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:39:21,625 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:21,627 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:39:21,627 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:39:21,628 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:21,661 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-07-13 19:39:21,661 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:39:21,662 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:39:21,662 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-07-13 19:39:21,691 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:21,692 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [575290014] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:21,692 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:39:21,692 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 20 [2021-07-13 19:39:21,692 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000100508] [2021-07-13 19:39:21,692 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 19:39:21,692 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:39:21,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 19:39:21,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:39:21,692 INFO L87 Difference]: Start difference. First operand 2242 states and 6387 transitions. Second operand has 20 states, 20 states have (on average 1.5) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:22,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:39:22,080 INFO L93 Difference]: Finished difference Result 2274 states and 6431 transitions. [2021-07-13 19:39:22,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 19:39:22,080 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.5) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:39:22,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:39:22,083 INFO L225 Difference]: With dead ends: 2274 [2021-07-13 19:39:22,083 INFO L226 Difference]: Without dead ends: 2266 [2021-07-13 19:39:22,083 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 408.0ms TimeCoverageRelationStatistics Valid=99, Invalid=713, Unknown=0, NotChecked=0, Total=812 [2021-07-13 19:39:22,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2266 states. [2021-07-13 19:39:22,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2266 to 2226. [2021-07-13 19:39:22,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2226 states, 2225 states have (on average 2.8503370786516853) internal successors, (6342), 2225 states have internal predecessors, (6342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:22,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2226 states to 2226 states and 6342 transitions. [2021-07-13 19:39:22,108 INFO L78 Accepts]: Start accepts. Automaton has 2226 states and 6342 transitions. Word has length 19 [2021-07-13 19:39:22,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:39:22,108 INFO L482 AbstractCegarLoop]: Abstraction has 2226 states and 6342 transitions. [2021-07-13 19:39:22,108 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.5) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:22,108 INFO L276 IsEmpty]: Start isEmpty. Operand 2226 states and 6342 transitions. [2021-07-13 19:39:22,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:39:22,110 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:39:22,110 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:39:22,310 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4102,524 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:22,311 INFO L430 AbstractCegarLoop]: === Iteration 534 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:39:22,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:39:22,311 INFO L82 PathProgramCache]: Analyzing trace with hash -1629909414, now seen corresponding path program 520 times [2021-07-13 19:39:22,311 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:39:22,311 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368480348] [2021-07-13 19:39:22,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:39:22,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:22,402 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:22,402 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:39:22,402 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368480348] [2021-07-13 19:39:22,402 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1368480348] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:22,403 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1387999305] [2021-07-13 19:39:22,403 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 525 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 525 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:22,430 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:39:22,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:39:22,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 19:39:22,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:39:22,577 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:39:22,578 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:39:22,578 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:39:22,579 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:22,581 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:39:22,581 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:39:22,581 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:39:22,582 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:22,584 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:39:22,585 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:39:22,585 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:39:22,585 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:22,587 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:39:22,588 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:39:22,588 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:22,621 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-07-13 19:39:22,621 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:39:22,621 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:39:22,621 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-07-13 19:39:22,684 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:22,685 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1387999305] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:22,685 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:39:22,685 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 21 [2021-07-13 19:39:22,685 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665608218] [2021-07-13 19:39:22,685 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:39:22,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:39:22,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:39:22,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:39:22,685 INFO L87 Difference]: Start difference. First operand 2226 states and 6342 transitions. Second operand has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:23,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:39:23,104 INFO L93 Difference]: Finished difference Result 2457 states and 6799 transitions. [2021-07-13 19:39:23,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 19:39:23,105 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:39:23,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:39:23,108 INFO L225 Difference]: With dead ends: 2457 [2021-07-13 19:39:23,108 INFO L226 Difference]: Without dead ends: 2457 [2021-07-13 19:39:23,108 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 403.5ms TimeCoverageRelationStatistics Valid=105, Invalid=707, Unknown=0, NotChecked=0, Total=812 [2021-07-13 19:39:23,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2457 states. [2021-07-13 19:39:23,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2457 to 2278. [2021-07-13 19:39:23,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2278 states, 2277 states have (on average 2.8563899868247695) internal successors, (6504), 2277 states have internal predecessors, (6504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:23,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2278 states to 2278 states and 6504 transitions. [2021-07-13 19:39:23,136 INFO L78 Accepts]: Start accepts. Automaton has 2278 states and 6504 transitions. Word has length 19 [2021-07-13 19:39:23,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:39:23,136 INFO L482 AbstractCegarLoop]: Abstraction has 2278 states and 6504 transitions. [2021-07-13 19:39:23,136 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:23,136 INFO L276 IsEmpty]: Start isEmpty. Operand 2278 states and 6504 transitions. [2021-07-13 19:39:23,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:39:23,138 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:39:23,138 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:39:23,339 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4109,525 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:23,339 INFO L430 AbstractCegarLoop]: === Iteration 535 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:39:23,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:39:23,339 INFO L82 PathProgramCache]: Analyzing trace with hash -828293186, now seen corresponding path program 521 times [2021-07-13 19:39:23,339 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:39:23,339 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103456750] [2021-07-13 19:39:23,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:39:23,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:23,434 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:23,434 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:39:23,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103456750] [2021-07-13 19:39:23,434 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1103456750] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:23,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [263054738] [2021-07-13 19:39:23,434 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 526 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 526 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:23,464 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-13 19:39:23,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:39:23,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 19:39:23,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:39:23,609 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:39:23,609 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:39:23,610 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:39:23,611 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:23,613 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:39:23,613 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:39:23,613 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:39:23,614 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:23,616 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:39:23,617 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:39:23,617 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:39:23,618 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:23,620 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:39:23,620 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:39:23,620 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:23,653 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-07-13 19:39:23,653 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:39:23,654 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:39:23,654 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-07-13 19:39:23,724 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:23,724 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [263054738] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:23,724 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:39:23,724 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 21 [2021-07-13 19:39:23,724 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055512133] [2021-07-13 19:39:23,725 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:39:23,725 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:39:23,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:39:23,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:39:23,725 INFO L87 Difference]: Start difference. First operand 2278 states and 6504 transitions. Second operand has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:24,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:39:24,488 INFO L93 Difference]: Finished difference Result 2478 states and 6869 transitions. [2021-07-13 19:39:24,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-07-13 19:39:24,489 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:39:24,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:39:24,492 INFO L225 Difference]: With dead ends: 2478 [2021-07-13 19:39:24,492 INFO L226 Difference]: Without dead ends: 2470 [2021-07-13 19:39:24,492 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 377 ImplicationChecksByTransitivity, 666.4ms TimeCoverageRelationStatistics Valid=171, Invalid=1389, Unknown=0, NotChecked=0, Total=1560 [2021-07-13 19:39:24,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2470 states. [2021-07-13 19:39:24,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2470 to 2290. [2021-07-13 19:39:24,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2290 states, 2289 states have (on average 2.859327217125382) internal successors, (6545), 2289 states have internal predecessors, (6545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:24,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2290 states to 2290 states and 6545 transitions. [2021-07-13 19:39:24,519 INFO L78 Accepts]: Start accepts. Automaton has 2290 states and 6545 transitions. Word has length 19 [2021-07-13 19:39:24,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:39:24,519 INFO L482 AbstractCegarLoop]: Abstraction has 2290 states and 6545 transitions. [2021-07-13 19:39:24,519 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:24,519 INFO L276 IsEmpty]: Start isEmpty. Operand 2290 states and 6545 transitions. [2021-07-13 19:39:24,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:39:24,521 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:39:24,521 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:39:24,721 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4113,526 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:24,722 INFO L430 AbstractCegarLoop]: === Iteration 536 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:39:24,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:39:24,722 INFO L82 PathProgramCache]: Analyzing trace with hash 890050520, now seen corresponding path program 522 times [2021-07-13 19:39:24,722 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:39:24,722 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360071464] [2021-07-13 19:39:24,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:39:24,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:24,810 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:24,810 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:39:24,810 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360071464] [2021-07-13 19:39:24,810 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1360071464] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:24,810 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [388850325] [2021-07-13 19:39:24,810 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 527 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 527 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:24,839 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-13 19:39:24,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:39:24,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 19:39:24,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:39:24,980 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:39:24,981 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:39:24,981 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:39:24,982 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:24,984 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:39:24,984 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:39:24,985 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:39:24,985 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:24,994 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:39:24,994 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:39:24,994 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:39:24,995 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:24,997 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:39:24,997 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:39:24,998 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:25,041 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-07-13 19:39:25,042 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:39:25,042 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:39:25,042 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-07-13 19:39:25,092 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:25,093 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [388850325] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:25,093 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:39:25,093 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 21 [2021-07-13 19:39:25,093 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672633811] [2021-07-13 19:39:25,093 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:39:25,093 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:39:25,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:39:25,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:39:25,093 INFO L87 Difference]: Start difference. First operand 2290 states and 6545 transitions. Second operand has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:25,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:39:25,560 INFO L93 Difference]: Finished difference Result 2446 states and 6828 transitions. [2021-07-13 19:39:25,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 19:39:25,560 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:39:25,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:39:25,563 INFO L225 Difference]: With dead ends: 2446 [2021-07-13 19:39:25,563 INFO L226 Difference]: Without dead ends: 2446 [2021-07-13 19:39:25,564 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 422.3ms TimeCoverageRelationStatistics Valid=114, Invalid=756, Unknown=0, NotChecked=0, Total=870 [2021-07-13 19:39:25,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2446 states. [2021-07-13 19:39:25,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2446 to 2280. [2021-07-13 19:39:25,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2280 states, 2279 states have (on average 2.8547608600263272) internal successors, (6506), 2279 states have internal predecessors, (6506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:25,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2280 states to 2280 states and 6506 transitions. [2021-07-13 19:39:25,590 INFO L78 Accepts]: Start accepts. Automaton has 2280 states and 6506 transitions. Word has length 19 [2021-07-13 19:39:25,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:39:25,590 INFO L482 AbstractCegarLoop]: Abstraction has 2280 states and 6506 transitions. [2021-07-13 19:39:25,590 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:25,590 INFO L276 IsEmpty]: Start isEmpty. Operand 2280 states and 6506 transitions. [2021-07-13 19:39:25,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:39:25,592 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:39:25,592 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:39:25,792 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4118,527 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:25,793 INFO L430 AbstractCegarLoop]: === Iteration 537 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:39:25,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:39:25,793 INFO L82 PathProgramCache]: Analyzing trace with hash -820562788, now seen corresponding path program 523 times [2021-07-13 19:39:25,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:39:25,793 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134972561] [2021-07-13 19:39:25,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:39:25,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:25,874 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:25,875 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:39:25,875 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134972561] [2021-07-13 19:39:25,875 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1134972561] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:25,875 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [474361240] [2021-07-13 19:39:25,875 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 528 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 528 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:25,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:25,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 19:39:25,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:39:26,068 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:39:26,069 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:39:26,069 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:39:26,070 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:26,072 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:39:26,072 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:39:26,073 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:26,095 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-07-13 19:39:26,095 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:39:26,095 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:39:26,095 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-07-13 19:39:26,116 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:26,117 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [474361240] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:26,117 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:39:26,117 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 21 [2021-07-13 19:39:26,117 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192358439] [2021-07-13 19:39:26,117 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:39:26,117 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:39:26,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:39:26,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=366, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:39:26,117 INFO L87 Difference]: Start difference. First operand 2280 states and 6506 transitions. Second operand has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:26,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:39:26,691 INFO L93 Difference]: Finished difference Result 2473 states and 6877 transitions. [2021-07-13 19:39:26,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-13 19:39:26,692 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:39:26,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:39:26,695 INFO L225 Difference]: With dead ends: 2473 [2021-07-13 19:39:26,695 INFO L226 Difference]: Without dead ends: 2473 [2021-07-13 19:39:26,695 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 455.6ms TimeCoverageRelationStatistics Valid=131, Invalid=925, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 19:39:26,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2473 states. [2021-07-13 19:39:26,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2473 to 2275. [2021-07-13 19:39:26,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2275 states, 2274 states have (on average 2.8535620052770447) internal successors, (6489), 2274 states have internal predecessors, (6489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:26,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2275 states to 2275 states and 6489 transitions. [2021-07-13 19:39:26,721 INFO L78 Accepts]: Start accepts. Automaton has 2275 states and 6489 transitions. Word has length 19 [2021-07-13 19:39:26,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:39:26,722 INFO L482 AbstractCegarLoop]: Abstraction has 2275 states and 6489 transitions. [2021-07-13 19:39:26,722 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:26,722 INFO L276 IsEmpty]: Start isEmpty. Operand 2275 states and 6489 transitions. [2021-07-13 19:39:26,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:39:26,724 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:39:26,724 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:39:26,924 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 528 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4122 [2021-07-13 19:39:26,924 INFO L430 AbstractCegarLoop]: === Iteration 538 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:39:26,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:39:26,925 INFO L82 PathProgramCache]: Analyzing trace with hash 1984999512, now seen corresponding path program 524 times [2021-07-13 19:39:26,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:39:26,925 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201854540] [2021-07-13 19:39:26,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:39:26,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:27,001 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:27,001 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:39:27,001 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201854540] [2021-07-13 19:39:27,001 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [201854540] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:27,001 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [986375957] [2021-07-13 19:39:27,001 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 529 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 529 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:27,029 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:39:27,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:39:27,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 19:39:27,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:39:27,200 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:39:27,201 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:39:27,201 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:39:27,202 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:27,204 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:39:27,204 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:39:27,205 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:27,228 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-07-13 19:39:27,228 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:39:27,229 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:39:27,229 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-07-13 19:39:27,252 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:27,253 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [986375957] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:27,253 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:39:27,253 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 21 [2021-07-13 19:39:27,253 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326730056] [2021-07-13 19:39:27,253 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:39:27,253 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:39:27,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:39:27,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=368, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:39:27,253 INFO L87 Difference]: Start difference. First operand 2275 states and 6489 transitions. Second operand has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:27,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:39:27,568 INFO L93 Difference]: Finished difference Result 2428 states and 6783 transitions. [2021-07-13 19:39:27,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 19:39:27,569 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:39:27,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:39:27,572 INFO L225 Difference]: With dead ends: 2428 [2021-07-13 19:39:27,572 INFO L226 Difference]: Without dead ends: 2428 [2021-07-13 19:39:27,572 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 217.6ms TimeCoverageRelationStatistics Valid=52, Invalid=368, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:39:27,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2428 states. [2021-07-13 19:39:27,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2428 to 2275. [2021-07-13 19:39:27,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2275 states, 2274 states have (on average 2.8535620052770447) internal successors, (6489), 2274 states have internal predecessors, (6489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:27,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2275 states to 2275 states and 6489 transitions. [2021-07-13 19:39:27,597 INFO L78 Accepts]: Start accepts. Automaton has 2275 states and 6489 transitions. Word has length 19 [2021-07-13 19:39:27,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:39:27,597 INFO L482 AbstractCegarLoop]: Abstraction has 2275 states and 6489 transitions. [2021-07-13 19:39:27,597 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:27,598 INFO L276 IsEmpty]: Start isEmpty. Operand 2275 states and 6489 transitions. [2021-07-13 19:39:27,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:39:27,600 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:39:27,600 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:39:27,800 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4125,529 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:27,800 INFO L430 AbstractCegarLoop]: === Iteration 539 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:39:27,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:39:27,800 INFO L82 PathProgramCache]: Analyzing trace with hash 1246894460, now seen corresponding path program 525 times [2021-07-13 19:39:27,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:39:27,801 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315022790] [2021-07-13 19:39:27,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:39:27,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:27,880 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:39:27,880 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:39:27,880 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315022790] [2021-07-13 19:39:27,880 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [315022790] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:27,880 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2134099346] [2021-07-13 19:39:27,880 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 530 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 530 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:27,909 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 19:39:27,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:39:27,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 19:39:27,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:39:28,044 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:39:28,045 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:39:28,045 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:39:28,046 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:28,048 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:39:28,048 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:39:28,048 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:39:28,049 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:28,051 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:39:28,052 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:39:28,052 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:39:28,052 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:28,054 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:39:28,055 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:39:28,055 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:28,087 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-07-13 19:39:28,087 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:39:28,088 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:39:28,088 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-07-13 19:39:28,151 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:28,151 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2134099346] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:28,151 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:39:28,151 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 20 [2021-07-13 19:39:28,152 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785729293] [2021-07-13 19:39:28,152 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 19:39:28,152 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:39:28,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 19:39:28,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:39:28,152 INFO L87 Difference]: Start difference. First operand 2275 states and 6489 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:28,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:39:28,590 INFO L93 Difference]: Finished difference Result 2340 states and 6592 transitions. [2021-07-13 19:39:28,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-13 19:39:28,591 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:39:28,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:39:28,594 INFO L225 Difference]: With dead ends: 2340 [2021-07-13 19:39:28,594 INFO L226 Difference]: Without dead ends: 2336 [2021-07-13 19:39:28,594 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 436.4ms TimeCoverageRelationStatistics Valid=109, Invalid=761, Unknown=0, NotChecked=0, Total=870 [2021-07-13 19:39:28,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2336 states. [2021-07-13 19:39:28,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2336 to 2271. [2021-07-13 19:39:28,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2271 states, 2270 states have (on average 2.8515418502202645) internal successors, (6473), 2270 states have internal predecessors, (6473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:28,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2271 states to 2271 states and 6473 transitions. [2021-07-13 19:39:28,619 INFO L78 Accepts]: Start accepts. Automaton has 2271 states and 6473 transitions. Word has length 19 [2021-07-13 19:39:28,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:39:28,619 INFO L482 AbstractCegarLoop]: Abstraction has 2271 states and 6473 transitions. [2021-07-13 19:39:28,619 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:28,619 INFO L276 IsEmpty]: Start isEmpty. Operand 2271 states and 6473 transitions. [2021-07-13 19:39:28,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:39:28,622 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:39:28,622 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:39:28,822 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4128,530 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:28,822 INFO L430 AbstractCegarLoop]: === Iteration 540 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:39:28,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:39:28,823 INFO L82 PathProgramCache]: Analyzing trace with hash -1319025502, now seen corresponding path program 526 times [2021-07-13 19:39:28,823 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:39:28,823 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016019634] [2021-07-13 19:39:28,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:39:28,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:28,896 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:39:28,896 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:39:28,896 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016019634] [2021-07-13 19:39:28,896 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2016019634] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:28,896 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [955063535] [2021-07-13 19:39:28,896 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 531 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 531 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:28,924 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:39:28,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:39:28,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 19:39:28,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:39:29,106 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:39:29,107 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:29,109 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:39:29,110 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:29,113 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:39:29,113 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:39:29,113 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:39:29,114 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:29,116 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:39:29,117 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:29,119 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:39:29,120 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:29,122 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:39:29,123 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:39:29,123 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:29,153 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-07-13 19:39:29,153 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:39:29,154 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:39:29,154 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-07-13 19:39:29,180 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:29,181 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [955063535] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:29,181 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:39:29,181 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 20 [2021-07-13 19:39:29,181 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63420262] [2021-07-13 19:39:29,181 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 19:39:29,181 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:39:29,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 19:39:29,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:39:29,181 INFO L87 Difference]: Start difference. First operand 2271 states and 6473 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:29,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:39:29,521 INFO L93 Difference]: Finished difference Result 2322 states and 6549 transitions. [2021-07-13 19:39:29,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 19:39:29,522 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:39:29,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:39:29,525 INFO L225 Difference]: With dead ends: 2322 [2021-07-13 19:39:29,525 INFO L226 Difference]: Without dead ends: 2314 [2021-07-13 19:39:29,525 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 363.6ms TimeCoverageRelationStatistics Valid=92, Invalid=664, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:39:29,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2314 states. [2021-07-13 19:39:29,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2314 to 2269. [2021-07-13 19:39:29,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2269 states, 2268 states have (on average 2.8465608465608465) internal successors, (6456), 2268 states have internal predecessors, (6456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:29,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2269 states to 2269 states and 6456 transitions. [2021-07-13 19:39:29,550 INFO L78 Accepts]: Start accepts. Automaton has 2269 states and 6456 transitions. Word has length 19 [2021-07-13 19:39:29,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:39:29,550 INFO L482 AbstractCegarLoop]: Abstraction has 2269 states and 6456 transitions. [2021-07-13 19:39:29,551 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:29,551 INFO L276 IsEmpty]: Start isEmpty. Operand 2269 states and 6456 transitions. [2021-07-13 19:39:29,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:39:29,553 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:39:29,553 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:39:29,753 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 531 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4134 [2021-07-13 19:39:29,753 INFO L430 AbstractCegarLoop]: === Iteration 541 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:39:29,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:39:29,753 INFO L82 PathProgramCache]: Analyzing trace with hash 741834300, now seen corresponding path program 527 times [2021-07-13 19:39:29,754 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:39:29,754 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537712239] [2021-07-13 19:39:29,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:39:29,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:29,840 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:39:29,840 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:39:29,840 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537712239] [2021-07-13 19:39:29,840 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1537712239] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:29,840 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1118081608] [2021-07-13 19:39:29,840 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 532 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 532 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:29,869 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:39:29,869 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:39:29,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 19:39:29,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:39:30,058 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:39:30,059 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:30,061 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:39:30,062 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:30,064 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:39:30,064 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:39:30,064 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:39:30,065 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:30,067 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:39:30,068 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:30,070 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:39:30,071 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:30,073 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:39:30,073 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:39:30,074 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:30,103 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-07-13 19:39:30,103 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:39:30,104 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:39:30,104 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-07-13 19:39:30,131 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:30,131 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1118081608] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:30,131 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:39:30,131 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 20 [2021-07-13 19:39:30,132 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129816197] [2021-07-13 19:39:30,132 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 19:39:30,132 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:39:30,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 19:39:30,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:39:30,132 INFO L87 Difference]: Start difference. First operand 2269 states and 6456 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:30,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:39:30,468 INFO L93 Difference]: Finished difference Result 2304 states and 6506 transitions. [2021-07-13 19:39:30,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 19:39:30,468 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:39:30,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:39:30,471 INFO L225 Difference]: With dead ends: 2304 [2021-07-13 19:39:30,471 INFO L226 Difference]: Without dead ends: 2292 [2021-07-13 19:39:30,472 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 368.1ms TimeCoverageRelationStatistics Valid=84, Invalid=618, Unknown=0, NotChecked=0, Total=702 [2021-07-13 19:39:30,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2292 states. [2021-07-13 19:39:30,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2292 to 2265. [2021-07-13 19:39:30,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2265 states, 2264 states have (on average 2.8445229681978796) internal successors, (6440), 2264 states have internal predecessors, (6440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:30,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2265 states to 2265 states and 6440 transitions. [2021-07-13 19:39:30,496 INFO L78 Accepts]: Start accepts. Automaton has 2265 states and 6440 transitions. Word has length 19 [2021-07-13 19:39:30,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:39:30,496 INFO L482 AbstractCegarLoop]: Abstraction has 2265 states and 6440 transitions. [2021-07-13 19:39:30,496 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:30,496 INFO L276 IsEmpty]: Start isEmpty. Operand 2265 states and 6440 transitions. [2021-07-13 19:39:30,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:39:30,499 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:39:30,499 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:39:30,699 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 532 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4141 [2021-07-13 19:39:30,699 INFO L430 AbstractCegarLoop]: === Iteration 542 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:39:30,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:39:30,699 INFO L82 PathProgramCache]: Analyzing trace with hash -1011819174, now seen corresponding path program 528 times [2021-07-13 19:39:30,699 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:39:30,699 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480697163] [2021-07-13 19:39:30,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:39:30,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:30,812 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:30,812 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:39:30,812 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480697163] [2021-07-13 19:39:30,812 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1480697163] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:30,812 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [23347878] [2021-07-13 19:39:30,812 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 533 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 533 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:30,840 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:39:30,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:39:30,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 19:39:30,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:39:31,008 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:39:31,009 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:39:31,009 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:39:31,010 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:31,012 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:39:31,013 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:39:31,013 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:39:31,013 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:31,015 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:39:31,016 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:39:31,016 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:39:31,017 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:31,019 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:39:31,019 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:39:31,020 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:31,051 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-07-13 19:39:31,052 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:39:31,052 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:39:31,052 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-07-13 19:39:31,107 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:31,107 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [23347878] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:31,107 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:39:31,107 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-07-13 19:39:31,107 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122221961] [2021-07-13 19:39:31,107 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 19:39:31,108 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:39:31,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 19:39:31,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=406, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:39:31,108 INFO L87 Difference]: Start difference. First operand 2265 states and 6440 transitions. Second operand has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 22 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:31,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:39:31,621 INFO L93 Difference]: Finished difference Result 2498 states and 6887 transitions. [2021-07-13 19:39:31,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-13 19:39:31,621 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 22 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:39:31,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:39:31,625 INFO L225 Difference]: With dead ends: 2498 [2021-07-13 19:39:31,625 INFO L226 Difference]: Without dead ends: 2498 [2021-07-13 19:39:31,625 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 507.9ms TimeCoverageRelationStatistics Valid=120, Invalid=810, Unknown=0, NotChecked=0, Total=930 [2021-07-13 19:39:31,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2498 states. [2021-07-13 19:39:31,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2498 to 2300. [2021-07-13 19:39:31,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2300 states, 2299 states have (on average 2.854284471509352) internal successors, (6562), 2299 states have internal predecessors, (6562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:31,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2300 states to 2300 states and 6562 transitions. [2021-07-13 19:39:31,651 INFO L78 Accepts]: Start accepts. Automaton has 2300 states and 6562 transitions. Word has length 19 [2021-07-13 19:39:31,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:39:31,651 INFO L482 AbstractCegarLoop]: Abstraction has 2300 states and 6562 transitions. [2021-07-13 19:39:31,651 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 22 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:31,651 INFO L276 IsEmpty]: Start isEmpty. Operand 2300 states and 6562 transitions. [2021-07-13 19:39:31,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:39:31,654 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:39:31,654 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:39:31,854 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4148,533 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:31,854 INFO L430 AbstractCegarLoop]: === Iteration 543 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:39:31,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:39:31,854 INFO L82 PathProgramCache]: Analyzing trace with hash -210202946, now seen corresponding path program 529 times [2021-07-13 19:39:31,854 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:39:31,854 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653097155] [2021-07-13 19:39:31,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:39:31,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:31,955 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:31,955 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:39:31,955 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653097155] [2021-07-13 19:39:31,955 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1653097155] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:31,955 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [998420823] [2021-07-13 19:39:31,955 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 534 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 534 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:31,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:31,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 19:39:31,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:39:32,146 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:39:32,146 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:39:32,146 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:39:32,147 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:32,149 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:39:32,150 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:39:32,150 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:39:32,151 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:32,153 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:39:32,153 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:39:32,153 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:39:32,154 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:32,156 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:39:32,156 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:39:32,157 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:32,190 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-07-13 19:39:32,190 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:39:32,190 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:39:32,191 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-07-13 19:39:32,264 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:32,264 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [998420823] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:32,264 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:39:32,264 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-07-13 19:39:32,264 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935787704] [2021-07-13 19:39:32,265 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 19:39:32,265 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:39:32,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 19:39:32,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:39:32,265 INFO L87 Difference]: Start difference. First operand 2300 states and 6562 transitions. Second operand has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:33,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:39:33,214 INFO L93 Difference]: Finished difference Result 2556 states and 7084 transitions. [2021-07-13 19:39:33,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-07-13 19:39:33,215 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:39:33,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:39:33,218 INFO L225 Difference]: With dead ends: 2556 [2021-07-13 19:39:33,218 INFO L226 Difference]: Without dead ends: 2546 [2021-07-13 19:39:33,218 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 485 ImplicationChecksByTransitivity, 806.9ms TimeCoverageRelationStatistics Valid=195, Invalid=1697, Unknown=0, NotChecked=0, Total=1892 [2021-07-13 19:39:33,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2546 states. [2021-07-13 19:39:33,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2546 to 2360. [2021-07-13 19:39:33,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2360 states, 2359 states have (on average 2.8660449342941923) internal successors, (6761), 2359 states have internal predecessors, (6761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:33,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2360 states to 2360 states and 6761 transitions. [2021-07-13 19:39:33,245 INFO L78 Accepts]: Start accepts. Automaton has 2360 states and 6761 transitions. Word has length 19 [2021-07-13 19:39:33,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:39:33,245 INFO L482 AbstractCegarLoop]: Abstraction has 2360 states and 6761 transitions. [2021-07-13 19:39:33,246 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:33,246 INFO L276 IsEmpty]: Start isEmpty. Operand 2360 states and 6761 transitions. [2021-07-13 19:39:33,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:39:33,248 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:39:33,248 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:39:33,448 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4152,534 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:33,448 INFO L430 AbstractCegarLoop]: === Iteration 544 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:39:33,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:39:33,449 INFO L82 PathProgramCache]: Analyzing trace with hash 1508140760, now seen corresponding path program 530 times [2021-07-13 19:39:33,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:39:33,449 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970608939] [2021-07-13 19:39:33,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:39:33,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:33,557 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:33,557 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:39:33,557 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970608939] [2021-07-13 19:39:33,557 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1970608939] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:33,557 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1558570636] [2021-07-13 19:39:33,557 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 535 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 535 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:33,587 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:39:33,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:39:33,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 19:39:33,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:39:33,752 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:39:33,752 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:39:33,752 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:39:33,753 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:33,756 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:39:33,756 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:39:33,756 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:39:33,757 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:33,759 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:39:33,759 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:39:33,760 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:39:33,760 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:33,762 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:39:33,762 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:39:33,763 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:33,796 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-07-13 19:39:33,796 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:39:33,796 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:39:33,797 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-07-13 19:39:33,849 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:33,849 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1558570636] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:33,849 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:39:33,849 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-07-13 19:39:33,849 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60308813] [2021-07-13 19:39:33,849 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 19:39:33,849 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:39:33,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 19:39:33,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:39:33,850 INFO L87 Difference]: Start difference. First operand 2360 states and 6761 transitions. Second operand has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:34,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:39:34,438 INFO L93 Difference]: Finished difference Result 2526 states and 7034 transitions. [2021-07-13 19:39:34,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 19:39:34,438 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:39:34,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:39:34,442 INFO L225 Difference]: With dead ends: 2526 [2021-07-13 19:39:34,442 INFO L226 Difference]: Without dead ends: 2526 [2021-07-13 19:39:34,442 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 533.9ms TimeCoverageRelationStatistics Valid=139, Invalid=983, Unknown=0, NotChecked=0, Total=1122 [2021-07-13 19:39:34,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2526 states. [2021-07-13 19:39:34,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2526 to 2352. [2021-07-13 19:39:34,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2352 states, 2351 states have (on average 2.858358145470013) internal successors, (6720), 2351 states have internal predecessors, (6720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:34,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2352 states to 2352 states and 6720 transitions. [2021-07-13 19:39:34,469 INFO L78 Accepts]: Start accepts. Automaton has 2352 states and 6720 transitions. Word has length 19 [2021-07-13 19:39:34,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:39:34,470 INFO L482 AbstractCegarLoop]: Abstraction has 2352 states and 6720 transitions. [2021-07-13 19:39:34,470 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:34,470 INFO L276 IsEmpty]: Start isEmpty. Operand 2352 states and 6720 transitions. [2021-07-13 19:39:34,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:39:34,472 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:39:34,472 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:39:34,672 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4157,535 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:34,673 INFO L430 AbstractCegarLoop]: === Iteration 545 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:39:34,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:39:34,673 INFO L82 PathProgramCache]: Analyzing trace with hash -202472548, now seen corresponding path program 531 times [2021-07-13 19:39:34,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:39:34,673 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152626557] [2021-07-13 19:39:34,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:39:34,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:34,770 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:34,770 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:39:34,770 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152626557] [2021-07-13 19:39:34,770 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1152626557] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:34,770 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1248686029] [2021-07-13 19:39:34,770 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 536 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 536 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:34,799 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 19:39:34,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:39:34,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 19:39:34,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:39:34,984 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:39:34,984 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:39:34,984 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:39:34,985 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:34,987 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:39:34,988 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:39:34,988 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:35,011 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-07-13 19:39:35,012 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:39:35,012 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:39:35,012 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-07-13 19:39:35,034 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:35,034 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1248686029] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:35,034 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:39:35,035 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-07-13 19:39:35,035 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079750164] [2021-07-13 19:39:35,035 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 19:39:35,035 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:39:35,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 19:39:35,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=405, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:39:35,035 INFO L87 Difference]: Start difference. First operand 2352 states and 6720 transitions. Second operand has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:35,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:39:35,827 INFO L93 Difference]: Finished difference Result 2641 states and 7272 transitions. [2021-07-13 19:39:35,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-07-13 19:39:35,828 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:39:35,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:39:35,831 INFO L225 Difference]: With dead ends: 2641 [2021-07-13 19:39:35,831 INFO L226 Difference]: Without dead ends: 2641 [2021-07-13 19:39:35,831 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 414 ImplicationChecksByTransitivity, 627.3ms TimeCoverageRelationStatistics Valid=190, Invalid=1532, Unknown=0, NotChecked=0, Total=1722 [2021-07-13 19:39:35,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2641 states. [2021-07-13 19:39:35,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2641 to 2356. [2021-07-13 19:39:35,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2356 states, 2355 states have (on average 2.860297239915074) internal successors, (6736), 2355 states have internal predecessors, (6736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:35,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2356 states to 2356 states and 6736 transitions. [2021-07-13 19:39:35,859 INFO L78 Accepts]: Start accepts. Automaton has 2356 states and 6736 transitions. Word has length 19 [2021-07-13 19:39:35,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:39:35,859 INFO L482 AbstractCegarLoop]: Abstraction has 2356 states and 6736 transitions. [2021-07-13 19:39:35,859 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:35,859 INFO L276 IsEmpty]: Start isEmpty. Operand 2356 states and 6736 transitions. [2021-07-13 19:39:35,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:39:35,861 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:39:35,861 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:39:36,061 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 536 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4161 [2021-07-13 19:39:36,062 INFO L430 AbstractCegarLoop]: === Iteration 546 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:39:36,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:39:36,062 INFO L82 PathProgramCache]: Analyzing trace with hash -1691877544, now seen corresponding path program 532 times [2021-07-13 19:39:36,062 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:39:36,062 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207159600] [2021-07-13 19:39:36,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:39:36,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:36,151 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:36,151 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:39:36,151 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207159600] [2021-07-13 19:39:36,151 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [207159600] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:36,151 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2020533742] [2021-07-13 19:39:36,151 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 537 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 537 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:36,180 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:39:36,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:39:36,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 19:39:36,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:39:36,365 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:39:36,366 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:39:36,366 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:39:36,367 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:36,369 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:39:36,369 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:39:36,370 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:36,392 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-07-13 19:39:36,392 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:39:36,392 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:39:36,393 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-07-13 19:39:36,415 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:36,415 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2020533742] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:36,415 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:39:36,415 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-07-13 19:39:36,415 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68866220] [2021-07-13 19:39:36,415 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 19:39:36,415 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:39:36,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 19:39:36,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=407, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:39:36,415 INFO L87 Difference]: Start difference. First operand 2356 states and 6736 transitions. Second operand has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:37,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:39:37,676 INFO L93 Difference]: Finished difference Result 2652 states and 7285 transitions. [2021-07-13 19:39:37,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-07-13 19:39:37,676 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:39:37,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:39:37,680 INFO L225 Difference]: With dead ends: 2652 [2021-07-13 19:39:37,680 INFO L226 Difference]: Without dead ends: 2652 [2021-07-13 19:39:37,680 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 644 ImplicationChecksByTransitivity, 932.1ms TimeCoverageRelationStatistics Valid=288, Invalid=2262, Unknown=0, NotChecked=0, Total=2550 [2021-07-13 19:39:37,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2652 states. [2021-07-13 19:39:37,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2652 to 2337. [2021-07-13 19:39:37,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2337 states, 2336 states have (on average 2.855736301369863) internal successors, (6671), 2336 states have internal predecessors, (6671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:37,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2337 states to 2337 states and 6671 transitions. [2021-07-13 19:39:37,708 INFO L78 Accepts]: Start accepts. Automaton has 2337 states and 6671 transitions. Word has length 19 [2021-07-13 19:39:37,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:39:37,708 INFO L482 AbstractCegarLoop]: Abstraction has 2337 states and 6671 transitions. [2021-07-13 19:39:37,708 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:37,708 INFO L276 IsEmpty]: Start isEmpty. Operand 2337 states and 6671 transitions. [2021-07-13 19:39:37,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:39:37,710 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:39:37,710 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:39:37,910 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 537 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4164 [2021-07-13 19:39:37,911 INFO L430 AbstractCegarLoop]: === Iteration 547 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:39:37,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:39:37,911 INFO L82 PathProgramCache]: Analyzing trace with hash -618792164, now seen corresponding path program 533 times [2021-07-13 19:39:37,911 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:39:37,911 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122876606] [2021-07-13 19:39:37,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:39:37,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:38,013 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:38,013 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:39:38,013 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122876606] [2021-07-13 19:39:38,013 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2122876606] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:38,013 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [813028931] [2021-07-13 19:39:38,013 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 538 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 538 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:38,042 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:39:38,043 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:39:38,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 19:39:38,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:39:38,234 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:39:38,235 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:39:38,235 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:39:38,236 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:38,238 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:39:38,238 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:39:38,239 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:38,261 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-07-13 19:39:38,261 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:39:38,262 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:39:38,262 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-07-13 19:39:38,285 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:38,285 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [813028931] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:38,285 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:39:38,285 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-07-13 19:39:38,285 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413652540] [2021-07-13 19:39:38,286 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 19:39:38,286 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:39:38,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 19:39:38,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=409, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:39:38,286 INFO L87 Difference]: Start difference. First operand 2337 states and 6671 transitions. Second operand has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:38,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:39:38,694 INFO L93 Difference]: Finished difference Result 2469 states and 6898 transitions. [2021-07-13 19:39:38,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 19:39:38,695 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:39:38,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:39:38,698 INFO L225 Difference]: With dead ends: 2469 [2021-07-13 19:39:38,698 INFO L226 Difference]: Without dead ends: 2469 [2021-07-13 19:39:38,698 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 259.1ms TimeCoverageRelationStatistics Valid=53, Invalid=409, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:39:38,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2469 states. [2021-07-13 19:39:38,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2469 to 2337. [2021-07-13 19:39:38,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2337 states, 2336 states have (on average 2.855736301369863) internal successors, (6671), 2336 states have internal predecessors, (6671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:38,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2337 states to 2337 states and 6671 transitions. [2021-07-13 19:39:38,725 INFO L78 Accepts]: Start accepts. Automaton has 2337 states and 6671 transitions. Word has length 19 [2021-07-13 19:39:38,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:39:38,725 INFO L482 AbstractCegarLoop]: Abstraction has 2337 states and 6671 transitions. [2021-07-13 19:39:38,725 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:38,725 INFO L276 IsEmpty]: Start isEmpty. Operand 2337 states and 6671 transitions. [2021-07-13 19:39:38,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:39:38,728 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:39:38,728 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:39:38,928 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 538 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4167 [2021-07-13 19:39:38,928 INFO L430 AbstractCegarLoop]: === Iteration 548 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:39:38,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:39:38,928 INFO L82 PathProgramCache]: Analyzing trace with hash 1288759676, now seen corresponding path program 534 times [2021-07-13 19:39:38,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:39:38,929 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240208438] [2021-07-13 19:39:38,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:39:38,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:39,024 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:39:39,024 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:39:39,024 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240208438] [2021-07-13 19:39:39,024 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [240208438] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:39,024 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1490396083] [2021-07-13 19:39:39,024 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 539 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 539 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:39,053 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:39:39,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:39:39,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 19:39:39,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:39:39,215 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:39:39,216 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:39:39,216 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:39:39,217 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:39,219 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:39:39,219 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:39:39,220 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:39:39,220 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:39,222 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:39:39,223 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:39:39,223 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:39:39,224 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:39,226 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:39:39,226 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:39:39,226 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:39,259 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-07-13 19:39:39,259 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:39:39,260 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:39:39,260 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-07-13 19:39:39,324 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:39,325 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1490396083] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:39,325 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:39:39,325 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 21 [2021-07-13 19:39:39,325 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605300788] [2021-07-13 19:39:39,325 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:39:39,325 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:39:39,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:39:39,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:39:39,325 INFO L87 Difference]: Start difference. First operand 2337 states and 6671 transitions. Second operand has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:39,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:39:39,747 INFO L93 Difference]: Finished difference Result 2411 states and 6789 transitions. [2021-07-13 19:39:39,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 19:39:39,747 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:39:39,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:39:39,750 INFO L225 Difference]: With dead ends: 2411 [2021-07-13 19:39:39,750 INFO L226 Difference]: Without dead ends: 2407 [2021-07-13 19:39:39,751 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 463.4ms TimeCoverageRelationStatistics Valid=105, Invalid=765, Unknown=0, NotChecked=0, Total=870 [2021-07-13 19:39:39,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2407 states. [2021-07-13 19:39:39,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2407 to 2331. [2021-07-13 19:39:39,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2331 states, 2330 states have (on average 2.853648068669528) internal successors, (6649), 2330 states have internal predecessors, (6649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:39,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2331 states to 2331 states and 6649 transitions. [2021-07-13 19:39:39,777 INFO L78 Accepts]: Start accepts. Automaton has 2331 states and 6649 transitions. Word has length 19 [2021-07-13 19:39:39,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:39:39,777 INFO L482 AbstractCegarLoop]: Abstraction has 2331 states and 6649 transitions. [2021-07-13 19:39:39,777 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:39,777 INFO L276 IsEmpty]: Start isEmpty. Operand 2331 states and 6649 transitions. [2021-07-13 19:39:39,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:39:39,780 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:39:39,780 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:39:39,980 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4170,539 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:39,980 INFO L430 AbstractCegarLoop]: === Iteration 549 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:39:39,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:39:39,980 INFO L82 PathProgramCache]: Analyzing trace with hash -1277160286, now seen corresponding path program 535 times [2021-07-13 19:39:39,980 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:39:39,980 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792388481] [2021-07-13 19:39:39,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:39:39,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:40,066 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:39:40,067 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:39:40,067 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792388481] [2021-07-13 19:39:40,067 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1792388481] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:40,067 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [241277457] [2021-07-13 19:39:40,067 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 540 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 540 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:40,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:40,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 19:39:40,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:39:40,312 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:39:40,313 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:40,315 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:39:40,316 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:40,318 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:39:40,319 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:39:40,319 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:39:40,320 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:40,322 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:39:40,323 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:40,325 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:39:40,326 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:40,328 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:39:40,328 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:39:40,329 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:40,359 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-07-13 19:39:40,359 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:39:40,360 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:39:40,360 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-07-13 19:39:40,388 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:40,388 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [241277457] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:40,388 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:39:40,388 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 21 [2021-07-13 19:39:40,388 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451198312] [2021-07-13 19:39:40,388 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:39:40,388 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:39:40,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:39:40,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=366, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:39:40,389 INFO L87 Difference]: Start difference. First operand 2331 states and 6649 transitions. Second operand has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:40,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:39:40,771 INFO L93 Difference]: Finished difference Result 2382 states and 6723 transitions. [2021-07-13 19:39:40,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 19:39:40,771 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:39:40,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:39:40,774 INFO L225 Difference]: With dead ends: 2382 [2021-07-13 19:39:40,775 INFO L226 Difference]: Without dead ends: 2374 [2021-07-13 19:39:40,775 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 430.3ms TimeCoverageRelationStatistics Valid=101, Invalid=769, Unknown=0, NotChecked=0, Total=870 [2021-07-13 19:39:40,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2374 states. [2021-07-13 19:39:40,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2374 to 2328. [2021-07-13 19:39:40,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2328 states, 2327 states have (on average 2.84959174903309) internal successors, (6631), 2327 states have internal predecessors, (6631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:40,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2328 states to 2328 states and 6631 transitions. [2021-07-13 19:39:40,801 INFO L78 Accepts]: Start accepts. Automaton has 2328 states and 6631 transitions. Word has length 19 [2021-07-13 19:39:40,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:39:40,801 INFO L482 AbstractCegarLoop]: Abstraction has 2328 states and 6631 transitions. [2021-07-13 19:39:40,801 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:40,801 INFO L276 IsEmpty]: Start isEmpty. Operand 2328 states and 6631 transitions. [2021-07-13 19:39:40,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:39:40,804 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:39:40,804 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:39:41,004 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4176,540 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:41,004 INFO L430 AbstractCegarLoop]: === Iteration 550 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:39:41,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:39:41,004 INFO L82 PathProgramCache]: Analyzing trace with hash 783699516, now seen corresponding path program 536 times [2021-07-13 19:39:41,004 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:39:41,004 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937350188] [2021-07-13 19:39:41,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:39:41,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:41,083 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:39:41,083 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:39:41,083 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937350188] [2021-07-13 19:39:41,084 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1937350188] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:41,084 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [327467170] [2021-07-13 19:39:41,084 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 541 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 541 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:41,112 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:39:41,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:39:41,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 19:39:41,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:39:41,317 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:39:41,318 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:41,320 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:39:41,321 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:41,323 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:39:41,324 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:39:41,324 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:39:41,325 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:41,327 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:39:41,328 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:41,330 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:39:41,331 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:41,333 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:39:41,333 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:39:41,334 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:41,363 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-07-13 19:39:41,364 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:39:41,365 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:39:41,365 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-07-13 19:39:41,394 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:41,395 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [327467170] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:41,395 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:39:41,395 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 21 [2021-07-13 19:39:41,395 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660032658] [2021-07-13 19:39:41,395 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:39:41,395 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:39:41,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:39:41,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=368, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:39:41,395 INFO L87 Difference]: Start difference. First operand 2328 states and 6631 transitions. Second operand has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:41,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:39:41,778 INFO L93 Difference]: Finished difference Result 2381 states and 6708 transitions. [2021-07-13 19:39:41,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 19:39:41,778 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:39:41,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:39:41,781 INFO L225 Difference]: With dead ends: 2381 [2021-07-13 19:39:41,781 INFO L226 Difference]: Without dead ends: 2369 [2021-07-13 19:39:41,781 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 423.2ms TimeCoverageRelationStatistics Valid=99, Invalid=771, Unknown=0, NotChecked=0, Total=870 [2021-07-13 19:39:41,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2369 states. [2021-07-13 19:39:41,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2369 to 2328. [2021-07-13 19:39:41,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2328 states, 2327 states have (on average 2.842286205414697) internal successors, (6614), 2327 states have internal predecessors, (6614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:41,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2328 states to 2328 states and 6614 transitions. [2021-07-13 19:39:41,807 INFO L78 Accepts]: Start accepts. Automaton has 2328 states and 6614 transitions. Word has length 19 [2021-07-13 19:39:41,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:39:41,807 INFO L482 AbstractCegarLoop]: Abstraction has 2328 states and 6614 transitions. [2021-07-13 19:39:41,807 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:41,807 INFO L276 IsEmpty]: Start isEmpty. Operand 2328 states and 6614 transitions. [2021-07-13 19:39:41,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:39:41,810 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:39:41,810 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:39:42,010 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 541 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4183 [2021-07-13 19:39:42,010 INFO L430 AbstractCegarLoop]: === Iteration 551 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:39:42,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:39:42,010 INFO L82 PathProgramCache]: Analyzing trace with hash 245843938, now seen corresponding path program 537 times [2021-07-13 19:39:42,010 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:39:42,010 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757147541] [2021-07-13 19:39:42,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:39:42,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:42,090 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:39:42,090 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:39:42,090 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757147541] [2021-07-13 19:39:42,090 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1757147541] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:42,090 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [212473884] [2021-07-13 19:39:42,090 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 542 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 542 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:42,118 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:39:42,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:39:42,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 19:39:42,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:39:42,334 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:39:42,335 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:42,337 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:39:42,338 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:42,340 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:39:42,340 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:39:42,341 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:39:42,341 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:42,343 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:39:42,344 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:42,346 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:39:42,347 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:42,349 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:39:42,349 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:39:42,350 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:42,380 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-07-13 19:39:42,380 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:39:42,381 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:39:42,381 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-07-13 19:39:42,409 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:42,409 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [212473884] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:42,410 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:39:42,410 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 21 [2021-07-13 19:39:42,410 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131461923] [2021-07-13 19:39:42,410 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:39:42,410 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:39:42,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:39:42,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=370, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:39:42,410 INFO L87 Difference]: Start difference. First operand 2328 states and 6614 transitions. Second operand has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:42,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:39:42,814 INFO L93 Difference]: Finished difference Result 2369 states and 6671 transitions. [2021-07-13 19:39:42,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 19:39:42,814 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:39:42,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:39:42,817 INFO L225 Difference]: With dead ends: 2369 [2021-07-13 19:39:42,817 INFO L226 Difference]: Without dead ends: 2353 [2021-07-13 19:39:42,818 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 439.4ms TimeCoverageRelationStatistics Valid=95, Invalid=775, Unknown=0, NotChecked=0, Total=870 [2021-07-13 19:39:42,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2353 states. [2021-07-13 19:39:42,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2353 to 2328. [2021-07-13 19:39:42,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2328 states, 2327 states have (on average 2.839278040395359) internal successors, (6607), 2327 states have internal predecessors, (6607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:42,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2328 states to 2328 states and 6607 transitions. [2021-07-13 19:39:42,845 INFO L78 Accepts]: Start accepts. Automaton has 2328 states and 6607 transitions. Word has length 19 [2021-07-13 19:39:42,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:39:42,845 INFO L482 AbstractCegarLoop]: Abstraction has 2328 states and 6607 transitions. [2021-07-13 19:39:42,845 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:42,845 INFO L276 IsEmpty]: Start isEmpty. Operand 2328 states and 6607 transitions. [2021-07-13 19:39:42,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:39:42,848 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:39:42,848 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:39:43,048 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4190,542 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:43,048 INFO L430 AbstractCegarLoop]: === Iteration 552 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:39:43,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:39:43,048 INFO L82 PathProgramCache]: Analyzing trace with hash 969109082, now seen corresponding path program 538 times [2021-07-13 19:39:43,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:39:43,049 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133981111] [2021-07-13 19:39:43,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:39:43,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:43,164 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:43,164 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:39:43,164 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133981111] [2021-07-13 19:39:43,164 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1133981111] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:43,164 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1497301529] [2021-07-13 19:39:43,164 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 543 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 543 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:43,192 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:39:43,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:39:43,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 19:39:43,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:39:43,364 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:39:43,365 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:39:43,365 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:39:43,366 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:43,368 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:39:43,368 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:39:43,369 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:39:43,369 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:43,371 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:39:43,372 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:39:43,372 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:39:43,373 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:43,375 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:39:43,375 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:39:43,376 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:43,409 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-07-13 19:39:43,409 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:39:43,409 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:39:43,409 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-07-13 19:39:43,465 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:43,465 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1497301529] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:43,465 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:39:43,465 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-07-13 19:39:43,465 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359144876] [2021-07-13 19:39:43,465 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 19:39:43,465 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:39:43,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 19:39:43,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:39:43,466 INFO L87 Difference]: Start difference. First operand 2328 states and 6607 transitions. Second operand has 23 states, 23 states have (on average 1.3478260869565217) internal successors, (31), 23 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:43,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:39:43,863 INFO L93 Difference]: Finished difference Result 2501 states and 6942 transitions. [2021-07-13 19:39:43,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:39:43,864 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.3478260869565217) internal successors, (31), 23 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:39:43,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:39:43,867 INFO L225 Difference]: With dead ends: 2501 [2021-07-13 19:39:43,867 INFO L226 Difference]: Without dead ends: 2501 [2021-07-13 19:39:43,867 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 404.4ms TimeCoverageRelationStatistics Valid=91, Invalid=721, Unknown=0, NotChecked=0, Total=812 [2021-07-13 19:39:43,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2501 states. [2021-07-13 19:39:43,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2501 to 2355. [2021-07-13 19:39:43,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2355 states, 2354 states have (on average 2.846644010195412) internal successors, (6701), 2354 states have internal predecessors, (6701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:43,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2355 states to 2355 states and 6701 transitions. [2021-07-13 19:39:43,896 INFO L78 Accepts]: Start accepts. Automaton has 2355 states and 6701 transitions. Word has length 19 [2021-07-13 19:39:43,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:39:43,897 INFO L482 AbstractCegarLoop]: Abstraction has 2355 states and 6701 transitions. [2021-07-13 19:39:43,897 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.3478260869565217) internal successors, (31), 23 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:43,897 INFO L276 IsEmpty]: Start isEmpty. Operand 2355 states and 6701 transitions. [2021-07-13 19:39:43,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:39:43,899 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:39:43,899 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:39:44,099 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 543 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4197 [2021-07-13 19:39:44,100 INFO L430 AbstractCegarLoop]: === Iteration 553 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:39:44,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:39:44,100 INFO L82 PathProgramCache]: Analyzing trace with hash 1770725310, now seen corresponding path program 539 times [2021-07-13 19:39:44,100 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:39:44,100 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489297375] [2021-07-13 19:39:44,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:39:44,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:44,213 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:44,214 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:39:44,214 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489297375] [2021-07-13 19:39:44,214 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1489297375] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:44,214 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1140841942] [2021-07-13 19:39:44,214 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 544 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 544 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:44,254 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-13 19:39:44,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:39:44,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 19:39:44,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:39:44,428 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:39:44,429 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:39:44,429 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:39:44,430 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:44,432 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:39:44,433 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:39:44,433 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:39:44,434 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:44,436 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:39:44,436 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:39:44,436 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:39:44,437 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:44,439 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:39:44,439 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:39:44,440 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:44,473 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-07-13 19:39:44,473 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:39:44,474 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:39:44,474 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-07-13 19:39:44,549 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:44,549 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1140841942] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:44,549 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:39:44,549 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-07-13 19:39:44,549 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090790001] [2021-07-13 19:39:44,550 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 19:39:44,550 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:39:44,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 19:39:44,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:39:44,550 INFO L87 Difference]: Start difference. First operand 2355 states and 6701 transitions. Second operand has 23 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 23 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:45,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:39:45,591 INFO L93 Difference]: Finished difference Result 2540 states and 7010 transitions. [2021-07-13 19:39:45,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-07-13 19:39:45,592 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 23 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:39:45,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:39:45,595 INFO L225 Difference]: With dead ends: 2540 [2021-07-13 19:39:45,595 INFO L226 Difference]: Without dead ends: 2528 [2021-07-13 19:39:45,595 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 615 ImplicationChecksByTransitivity, 985.5ms TimeCoverageRelationStatistics Valid=230, Invalid=2026, Unknown=0, NotChecked=0, Total=2256 [2021-07-13 19:39:45,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2528 states. [2021-07-13 19:39:45,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2528 to 2365. [2021-07-13 19:39:45,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2365 states, 2364 states have (on average 2.8468697123519457) internal successors, (6730), 2364 states have internal predecessors, (6730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:45,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2365 states to 2365 states and 6730 transitions. [2021-07-13 19:39:45,623 INFO L78 Accepts]: Start accepts. Automaton has 2365 states and 6730 transitions. Word has length 19 [2021-07-13 19:39:45,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:39:45,623 INFO L482 AbstractCegarLoop]: Abstraction has 2365 states and 6730 transitions. [2021-07-13 19:39:45,623 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 23 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:45,623 INFO L276 IsEmpty]: Start isEmpty. Operand 2365 states and 6730 transitions. [2021-07-13 19:39:45,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:39:45,626 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:39:45,626 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:39:45,826 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4201,544 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:45,826 INFO L430 AbstractCegarLoop]: === Iteration 554 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:39:45,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:39:45,827 INFO L82 PathProgramCache]: Analyzing trace with hash -805898280, now seen corresponding path program 540 times [2021-07-13 19:39:45,827 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:39:45,827 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196964615] [2021-07-13 19:39:45,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:39:45,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:45,943 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:45,943 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:39:45,943 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196964615] [2021-07-13 19:39:45,943 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [196964615] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:45,943 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [199083942] [2021-07-13 19:39:45,943 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 545 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 545 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:45,971 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-13 19:39:45,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:39:45,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 19:39:45,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:39:46,140 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:39:46,140 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:39:46,140 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:39:46,141 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:46,143 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:39:46,144 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:39:46,144 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:39:46,145 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:46,149 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:39:46,149 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:39:46,149 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:39:46,150 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:46,152 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:39:46,153 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:39:46,154 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:46,194 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-07-13 19:39:46,194 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:39:46,195 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:39:46,195 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-07-13 19:39:46,261 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:46,261 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [199083942] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:46,261 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:39:46,261 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-07-13 19:39:46,261 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175069581] [2021-07-13 19:39:46,261 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 19:39:46,261 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:39:46,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 19:39:46,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:39:46,262 INFO L87 Difference]: Start difference. First operand 2365 states and 6730 transitions. Second operand has 23 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 23 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:46,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:39:46,953 INFO L93 Difference]: Finished difference Result 2512 states and 6967 transitions. [2021-07-13 19:39:46,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-13 19:39:46,953 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 23 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:39:46,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:39:46,957 INFO L225 Difference]: With dead ends: 2512 [2021-07-13 19:39:46,957 INFO L226 Difference]: Without dead ends: 2512 [2021-07-13 19:39:46,957 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 349 ImplicationChecksByTransitivity, 697.8ms TimeCoverageRelationStatistics Valid=184, Invalid=1298, Unknown=0, NotChecked=0, Total=1482 [2021-07-13 19:39:46,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2512 states. [2021-07-13 19:39:46,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2512 to 2364. [2021-07-13 19:39:46,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2364 states, 2363 states have (on average 2.8404570461278036) internal successors, (6712), 2363 states have internal predecessors, (6712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:46,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2364 states to 2364 states and 6712 transitions. [2021-07-13 19:39:46,983 INFO L78 Accepts]: Start accepts. Automaton has 2364 states and 6712 transitions. Word has length 19 [2021-07-13 19:39:46,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:39:46,983 INFO L482 AbstractCegarLoop]: Abstraction has 2364 states and 6712 transitions. [2021-07-13 19:39:46,984 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 23 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:46,984 INFO L276 IsEmpty]: Start isEmpty. Operand 2364 states and 6712 transitions. [2021-07-13 19:39:46,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:39:46,986 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:39:46,986 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:39:47,186 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 545 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4206 [2021-07-13 19:39:47,186 INFO L430 AbstractCegarLoop]: === Iteration 555 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:39:47,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:39:47,187 INFO L82 PathProgramCache]: Analyzing trace with hash 1778455708, now seen corresponding path program 541 times [2021-07-13 19:39:47,187 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:39:47,187 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714467056] [2021-07-13 19:39:47,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:39:47,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:47,300 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:47,301 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:39:47,301 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714467056] [2021-07-13 19:39:47,301 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [714467056] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:47,301 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1843394236] [2021-07-13 19:39:47,301 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 546 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 546 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:47,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:47,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 19:39:47,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:39:47,543 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:39:47,544 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:39:47,544 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:39:47,545 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:47,547 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:39:47,547 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:39:47,548 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:47,570 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-07-13 19:39:47,570 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:39:47,571 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:39:47,571 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-07-13 19:39:47,594 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:47,594 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1843394236] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:47,594 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:39:47,594 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-07-13 19:39:47,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378800603] [2021-07-13 19:39:47,594 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 19:39:47,594 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:39:47,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 19:39:47,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=446, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:39:47,594 INFO L87 Difference]: Start difference. First operand 2364 states and 6712 transitions. Second operand has 23 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 23 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:48,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:39:48,511 INFO L93 Difference]: Finished difference Result 2649 states and 7227 transitions. [2021-07-13 19:39:48,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-07-13 19:39:48,512 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 23 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:39:48,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:39:48,523 INFO L225 Difference]: With dead ends: 2649 [2021-07-13 19:39:48,523 INFO L226 Difference]: Without dead ends: 2649 [2021-07-13 19:39:48,523 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 664 ImplicationChecksByTransitivity, 833.5ms TimeCoverageRelationStatistics Valid=246, Invalid=2204, Unknown=0, NotChecked=0, Total=2450 [2021-07-13 19:39:48,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2649 states. [2021-07-13 19:39:48,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2649 to 2368. [2021-07-13 19:39:48,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2368 states, 2367 states have (on average 2.841571609632446) internal successors, (6726), 2367 states have internal predecessors, (6726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:48,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2368 states to 2368 states and 6726 transitions. [2021-07-13 19:39:48,550 INFO L78 Accepts]: Start accepts. Automaton has 2368 states and 6726 transitions. Word has length 19 [2021-07-13 19:39:48,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:39:48,550 INFO L482 AbstractCegarLoop]: Abstraction has 2368 states and 6726 transitions. [2021-07-13 19:39:48,550 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 23 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:48,550 INFO L276 IsEmpty]: Start isEmpty. Operand 2368 states and 6726 transitions. [2021-07-13 19:39:48,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:39:48,553 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:39:48,553 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:39:48,753 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 546 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4210 [2021-07-13 19:39:48,753 INFO L430 AbstractCegarLoop]: === Iteration 556 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:39:48,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:39:48,754 INFO L82 PathProgramCache]: Analyzing trace with hash 289050712, now seen corresponding path program 542 times [2021-07-13 19:39:48,754 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:39:48,754 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276904970] [2021-07-13 19:39:48,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:39:48,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:48,864 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:48,864 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:39:48,864 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276904970] [2021-07-13 19:39:48,864 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1276904970] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:48,864 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1980615766] [2021-07-13 19:39:48,864 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 547 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 547 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:48,894 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:39:48,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:39:48,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 19:39:48,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:39:49,108 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:39:49,108 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:39:49,109 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:39:49,109 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:49,111 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:39:49,112 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:39:49,112 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:49,134 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-07-13 19:39:49,134 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:39:49,135 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:39:49,135 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-07-13 19:39:49,158 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:49,158 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1980615766] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:49,158 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:39:49,158 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-07-13 19:39:49,158 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043620873] [2021-07-13 19:39:49,158 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 19:39:49,158 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:39:49,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 19:39:49,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=448, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:39:49,159 INFO L87 Difference]: Start difference. First operand 2368 states and 6726 transitions. Second operand has 23 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 23 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:51,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:39:51,032 INFO L93 Difference]: Finished difference Result 2832 states and 7583 transitions. [2021-07-13 19:39:51,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-07-13 19:39:51,033 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 23 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:39:51,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:39:51,036 INFO L225 Difference]: With dead ends: 2832 [2021-07-13 19:39:51,036 INFO L226 Difference]: Without dead ends: 2832 [2021-07-13 19:39:51,036 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1666 ImplicationChecksByTransitivity, 1449.8ms TimeCoverageRelationStatistics Valid=486, Invalid=4770, Unknown=0, NotChecked=0, Total=5256 [2021-07-13 19:39:51,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2832 states. [2021-07-13 19:39:51,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2832 to 2369. [2021-07-13 19:39:51,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2369 states, 2368 states have (on average 2.845439189189189) internal successors, (6738), 2368 states have internal predecessors, (6738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:51,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2369 states to 2369 states and 6738 transitions. [2021-07-13 19:39:51,067 INFO L78 Accepts]: Start accepts. Automaton has 2369 states and 6738 transitions. Word has length 19 [2021-07-13 19:39:51,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:39:51,067 INFO L482 AbstractCegarLoop]: Abstraction has 2369 states and 6738 transitions. [2021-07-13 19:39:51,067 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 23 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:51,067 INFO L276 IsEmpty]: Start isEmpty. Operand 2369 states and 6738 transitions. [2021-07-13 19:39:51,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:39:51,070 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:39:51,070 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:39:51,270 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4213,547 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:51,270 INFO L430 AbstractCegarLoop]: === Iteration 557 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:39:51,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:39:51,271 INFO L82 PathProgramCache]: Analyzing trace with hash 1362136092, now seen corresponding path program 543 times [2021-07-13 19:39:51,271 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:39:51,271 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143969881] [2021-07-13 19:39:51,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:39:51,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:51,373 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:51,374 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:39:51,374 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143969881] [2021-07-13 19:39:51,374 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [143969881] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:51,374 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [739988146] [2021-07-13 19:39:51,374 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 548 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 548 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:51,402 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 19:39:51,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:39:51,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 19:39:51,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:39:51,601 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:39:51,601 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:39:51,601 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:39:51,602 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:51,604 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:39:51,604 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:39:51,605 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:51,627 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-07-13 19:39:51,627 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:39:51,627 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:39:51,628 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-07-13 19:39:51,651 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:51,651 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [739988146] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:51,651 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:39:51,651 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-07-13 19:39:51,651 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48478955] [2021-07-13 19:39:51,651 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 19:39:51,651 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:39:51,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 19:39:51,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=450, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:39:51,652 INFO L87 Difference]: Start difference. First operand 2369 states and 6738 transitions. Second operand has 23 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 23 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:54,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:39:54,440 INFO L93 Difference]: Finished difference Result 2708 states and 7362 transitions. [2021-07-13 19:39:54,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2021-07-13 19:39:54,440 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 23 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:39:54,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:39:54,444 INFO L225 Difference]: With dead ends: 2708 [2021-07-13 19:39:54,444 INFO L226 Difference]: Without dead ends: 2708 [2021-07-13 19:39:54,445 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2545 ImplicationChecksByTransitivity, 2104.3ms TimeCoverageRelationStatistics Valid=764, Invalid=7068, Unknown=0, NotChecked=0, Total=7832 [2021-07-13 19:39:54,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2708 states. [2021-07-13 19:39:54,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2708 to 2346. [2021-07-13 19:39:54,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2346 states, 2345 states have (on average 2.8388059701492536) internal successors, (6657), 2345 states have internal predecessors, (6657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:54,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2346 states to 2346 states and 6657 transitions. [2021-07-13 19:39:54,482 INFO L78 Accepts]: Start accepts. Automaton has 2346 states and 6657 transitions. Word has length 19 [2021-07-13 19:39:54,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:39:54,482 INFO L482 AbstractCegarLoop]: Abstraction has 2346 states and 6657 transitions. [2021-07-13 19:39:54,482 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 23 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:54,482 INFO L276 IsEmpty]: Start isEmpty. Operand 2346 states and 6657 transitions. [2021-07-13 19:39:54,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:39:54,484 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:39:54,484 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:39:54,685 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4216,548 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:54,685 INFO L430 AbstractCegarLoop]: === Iteration 558 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:39:54,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:39:54,685 INFO L82 PathProgramCache]: Analyzing trace with hash 268044504, now seen corresponding path program 544 times [2021-07-13 19:39:54,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:39:54,685 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185705739] [2021-07-13 19:39:54,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:39:54,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:54,798 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:54,798 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:39:54,798 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185705739] [2021-07-13 19:39:54,798 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1185705739] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:54,799 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1552815140] [2021-07-13 19:39:54,799 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 549 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 549 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:54,827 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:39:54,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:39:54,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 19:39:54,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:39:55,034 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:39:55,035 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:39:55,035 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:39:55,036 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:55,038 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:39:55,038 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:39:55,039 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:55,061 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-07-13 19:39:55,062 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:39:55,062 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:39:55,062 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-07-13 19:39:55,086 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:55,087 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1552815140] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:55,087 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:39:55,087 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-07-13 19:39:55,087 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142340808] [2021-07-13 19:39:55,087 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 19:39:55,087 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:39:55,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 19:39:55,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=452, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:39:55,087 INFO L87 Difference]: Start difference. First operand 2346 states and 6657 transitions. Second operand has 23 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 23 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:55,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:39:55,376 INFO L93 Difference]: Finished difference Result 2415 states and 6777 transitions. [2021-07-13 19:39:55,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 19:39:55,376 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 23 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:39:55,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:39:55,379 INFO L225 Difference]: With dead ends: 2415 [2021-07-13 19:39:55,379 INFO L226 Difference]: Without dead ends: 2415 [2021-07-13 19:39:55,379 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 280.8ms TimeCoverageRelationStatistics Valid=54, Invalid=452, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:39:55,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2415 states. [2021-07-13 19:39:55,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2415 to 2346. [2021-07-13 19:39:55,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2346 states, 2345 states have (on average 2.8388059701492536) internal successors, (6657), 2345 states have internal predecessors, (6657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:55,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2346 states to 2346 states and 6657 transitions. [2021-07-13 19:39:55,406 INFO L78 Accepts]: Start accepts. Automaton has 2346 states and 6657 transitions. Word has length 19 [2021-07-13 19:39:55,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:39:55,406 INFO L482 AbstractCegarLoop]: Abstraction has 2346 states and 6657 transitions. [2021-07-13 19:39:55,406 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 23 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:55,406 INFO L276 IsEmpty]: Start isEmpty. Operand 2346 states and 6657 transitions. [2021-07-13 19:39:55,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:39:55,409 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:39:55,409 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:39:55,609 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4219,549 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:55,609 INFO L430 AbstractCegarLoop]: === Iteration 559 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:39:55,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:39:55,609 INFO L82 PathProgramCache]: Analyzing trace with hash -843621406, now seen corresponding path program 545 times [2021-07-13 19:39:55,609 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:39:55,609 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662339871] [2021-07-13 19:39:55,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:39:55,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:55,713 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:55,713 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:39:55,713 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662339871] [2021-07-13 19:39:55,713 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [662339871] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:55,713 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1725121636] [2021-07-13 19:39:55,713 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 550 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 550 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:55,742 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:39:55,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:39:55,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 19:39:55,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:39:55,876 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:39:55,876 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:39:55,877 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:55,879 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:39:55,879 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:55,894 INFO L628 ElimStorePlain]: treesize reduction 27, result has 30.8 percent of original size [2021-07-13 19:39:55,894 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:39:55,894 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:39:55,894 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:53, output treesize:12 [2021-07-13 19:39:55,916 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:55,916 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1725121636] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:55,916 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:39:55,916 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2021-07-13 19:39:55,916 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009590281] [2021-07-13 19:39:55,916 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:39:55,916 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:39:55,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:39:55,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:39:55,916 INFO L87 Difference]: Start difference. First operand 2346 states and 6657 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:56,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:39:56,150 INFO L93 Difference]: Finished difference Result 3276 states and 9050 transitions. [2021-07-13 19:39:56,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:39:56,150 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:39:56,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:39:56,154 INFO L225 Difference]: With dead ends: 3276 [2021-07-13 19:39:56,154 INFO L226 Difference]: Without dead ends: 3276 [2021-07-13 19:39:56,155 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 242.8ms TimeCoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:39:56,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3276 states. [2021-07-13 19:39:56,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3276 to 2345. [2021-07-13 19:39:56,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2345 states, 2344 states have (on average 2.839590443686007) internal successors, (6656), 2344 states have internal predecessors, (6656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:56,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2345 states to 2345 states and 6656 transitions. [2021-07-13 19:39:56,185 INFO L78 Accepts]: Start accepts. Automaton has 2345 states and 6656 transitions. Word has length 19 [2021-07-13 19:39:56,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:39:56,186 INFO L482 AbstractCegarLoop]: Abstraction has 2345 states and 6656 transitions. [2021-07-13 19:39:56,186 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:56,186 INFO L276 IsEmpty]: Start isEmpty. Operand 2345 states and 6656 transitions. [2021-07-13 19:39:56,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:39:56,188 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:39:56,188 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:39:56,388 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 550 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4222 [2021-07-13 19:39:56,389 INFO L430 AbstractCegarLoop]: === Iteration 560 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:39:56,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:39:56,389 INFO L82 PathProgramCache]: Analyzing trace with hash -712743494, now seen corresponding path program 546 times [2021-07-13 19:39:56,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:39:56,389 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237271866] [2021-07-13 19:39:56,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:39:56,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:56,501 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:56,501 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:39:56,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237271866] [2021-07-13 19:39:56,501 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1237271866] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:56,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1406335032] [2021-07-13 19:39:56,501 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 551 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 551 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:56,530 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:39:56,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:39:56,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 19:39:56,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:39:56,661 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:39:56,662 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:56,664 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:39:56,664 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:39:56,665 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:56,667 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:39:56,668 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:39:56,668 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:56,670 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:39:56,671 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:56,673 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:39:56,673 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:56,675 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:39:56,676 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:56,698 INFO L628 ElimStorePlain]: treesize reduction 26, result has 43.5 percent of original size [2021-07-13 19:39:56,698 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:39:56,699 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:39:56,699 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 2 variables, input treesize:107, output treesize:20 [2021-07-13 19:39:56,728 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:56,728 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1406335032] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:56,728 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:39:56,728 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2021-07-13 19:39:56,728 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755490776] [2021-07-13 19:39:56,728 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:39:56,728 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:39:56,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:39:56,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:39:56,728 INFO L87 Difference]: Start difference. First operand 2345 states and 6656 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:57,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:39:57,175 INFO L93 Difference]: Finished difference Result 3271 states and 9034 transitions. [2021-07-13 19:39:57,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 19:39:57,175 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:39:57,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:39:57,180 INFO L225 Difference]: With dead ends: 3271 [2021-07-13 19:39:57,180 INFO L226 Difference]: Without dead ends: 3265 [2021-07-13 19:39:57,180 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 465.4ms TimeCoverageRelationStatistics Valid=127, Invalid=865, Unknown=0, NotChecked=0, Total=992 [2021-07-13 19:39:57,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3265 states. [2021-07-13 19:39:57,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3265 to 2345. [2021-07-13 19:39:57,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2345 states, 2344 states have (on average 2.839163822525597) internal successors, (6655), 2344 states have internal predecessors, (6655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:57,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2345 states to 2345 states and 6655 transitions. [2021-07-13 19:39:57,212 INFO L78 Accepts]: Start accepts. Automaton has 2345 states and 6655 transitions. Word has length 19 [2021-07-13 19:39:57,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:39:57,212 INFO L482 AbstractCegarLoop]: Abstraction has 2345 states and 6655 transitions. [2021-07-13 19:39:57,212 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:57,212 INFO L276 IsEmpty]: Start isEmpty. Operand 2345 states and 6655 transitions. [2021-07-13 19:39:57,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:39:57,215 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:39:57,215 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:39:57,415 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4224,551 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:57,415 INFO L430 AbstractCegarLoop]: === Iteration 561 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:39:57,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:39:57,416 INFO L82 PathProgramCache]: Analyzing trace with hash -545568448, now seen corresponding path program 547 times [2021-07-13 19:39:57,416 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:39:57,416 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177276079] [2021-07-13 19:39:57,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:39:57,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:57,524 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:57,524 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:39:57,524 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177276079] [2021-07-13 19:39:57,524 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1177276079] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:57,524 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [146491233] [2021-07-13 19:39:57,524 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 552 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 552 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:57,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:57,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 19:39:57,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:39:57,719 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:39:57,720 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:39:57,720 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:39:57,721 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:57,723 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:39:57,723 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:39:57,724 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:57,746 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-07-13 19:39:57,747 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:39:57,747 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:39:57,747 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-07-13 19:39:57,770 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:57,770 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [146491233] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:57,770 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:39:57,770 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-07-13 19:39:57,770 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903751370] [2021-07-13 19:39:57,770 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 19:39:57,770 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:39:57,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 19:39:57,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:39:57,771 INFO L87 Difference]: Start difference. First operand 2345 states and 6655 transitions. Second operand has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:58,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:39:58,039 INFO L93 Difference]: Finished difference Result 3277 states and 9052 transitions. [2021-07-13 19:39:58,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:39:58,040 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:39:58,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:39:58,043 INFO L225 Difference]: With dead ends: 3277 [2021-07-13 19:39:58,044 INFO L226 Difference]: Without dead ends: 3277 [2021-07-13 19:39:58,044 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 232.7ms TimeCoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:39:58,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3277 states. [2021-07-13 19:39:58,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3277 to 2346. [2021-07-13 19:39:58,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2346 states, 2345 states have (on average 2.839232409381663) internal successors, (6658), 2345 states have internal predecessors, (6658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:58,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2346 states to 2346 states and 6658 transitions. [2021-07-13 19:39:58,081 INFO L78 Accepts]: Start accepts. Automaton has 2346 states and 6658 transitions. Word has length 19 [2021-07-13 19:39:58,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:39:58,081 INFO L482 AbstractCegarLoop]: Abstraction has 2346 states and 6658 transitions. [2021-07-13 19:39:58,081 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:58,081 INFO L276 IsEmpty]: Start isEmpty. Operand 2346 states and 6658 transitions. [2021-07-13 19:39:58,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:39:58,084 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:39:58,084 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:39:58,284 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 552 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4231 [2021-07-13 19:39:58,284 INFO L430 AbstractCegarLoop]: === Iteration 562 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:39:58,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:39:58,285 INFO L82 PathProgramCache]: Analyzing trace with hash -1752979292, now seen corresponding path program 548 times [2021-07-13 19:39:58,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:39:58,285 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025926152] [2021-07-13 19:39:58,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:39:58,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:58,392 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:58,392 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:39:58,392 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025926152] [2021-07-13 19:39:58,392 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1025926152] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:58,392 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [267449008] [2021-07-13 19:39:58,392 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 553 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 553 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:58,419 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:39:58,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:39:58,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 19:39:58,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:39:58,622 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:39:58,623 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:58,625 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:39:58,626 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:58,628 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:39:58,629 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:39:58,629 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:39:58,630 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:58,632 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:39:58,632 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:39:58,633 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:39:58,633 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:58,635 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:39:58,636 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:58,638 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:39:58,639 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:58,671 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-07-13 19:39:58,672 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:39:58,672 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:39:58,673 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-07-13 19:39:58,702 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:58,702 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [267449008] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:58,702 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:39:58,703 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-07-13 19:39:58,703 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325325865] [2021-07-13 19:39:58,703 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 19:39:58,703 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:39:58,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 19:39:58,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:39:58,703 INFO L87 Difference]: Start difference. First operand 2346 states and 6658 transitions. Second operand has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:59,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:39:59,316 INFO L93 Difference]: Finished difference Result 3273 states and 9038 transitions. [2021-07-13 19:39:59,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 19:39:59,317 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:39:59,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:39:59,320 INFO L225 Difference]: With dead ends: 3273 [2021-07-13 19:39:59,320 INFO L226 Difference]: Without dead ends: 3268 [2021-07-13 19:39:59,321 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 589.7ms TimeCoverageRelationStatistics Valid=121, Invalid=935, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 19:39:59,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3268 states. [2021-07-13 19:39:59,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3268 to 2346. [2021-07-13 19:39:59,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2346 states, 2345 states have (on average 2.8388059701492536) internal successors, (6657), 2345 states have internal predecessors, (6657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:59,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2346 states to 2346 states and 6657 transitions. [2021-07-13 19:39:59,349 INFO L78 Accepts]: Start accepts. Automaton has 2346 states and 6657 transitions. Word has length 19 [2021-07-13 19:39:59,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:39:59,349 INFO L482 AbstractCegarLoop]: Abstraction has 2346 states and 6657 transitions. [2021-07-13 19:39:59,349 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:59,349 INFO L276 IsEmpty]: Start isEmpty. Operand 2346 states and 6657 transitions. [2021-07-13 19:39:59,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:39:59,351 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:39:59,351 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:39:59,551 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4234,553 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:59,552 INFO L430 AbstractCegarLoop]: === Iteration 563 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:39:59,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:39:59,552 INFO L82 PathProgramCache]: Analyzing trace with hash 2117451682, now seen corresponding path program 549 times [2021-07-13 19:39:59,552 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:39:59,552 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097053415] [2021-07-13 19:39:59,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:39:59,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:59,657 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:59,658 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:39:59,658 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097053415] [2021-07-13 19:39:59,658 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1097053415] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:59,658 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1673554142] [2021-07-13 19:39:59,658 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 554 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 554 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:59,688 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 19:39:59,688 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:39:59,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 19:39:59,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:39:59,856 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:39:59,857 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:39:59,857 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:39:59,858 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:59,860 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:39:59,860 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:39:59,861 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:59,883 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-07-13 19:39:59,883 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:39:59,884 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:39:59,884 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-07-13 19:39:59,906 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:59,906 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1673554142] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:59,906 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:39:59,906 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-07-13 19:39:59,906 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952107581] [2021-07-13 19:39:59,907 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 19:39:59,907 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:39:59,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 19:39:59,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=332, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:39:59,907 INFO L87 Difference]: Start difference. First operand 2346 states and 6657 transitions. Second operand has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:00,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:40:00,742 INFO L93 Difference]: Finished difference Result 3314 states and 9126 transitions. [2021-07-13 19:40:00,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-13 19:40:00,743 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:40:00,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:40:00,747 INFO L225 Difference]: With dead ends: 3314 [2021-07-13 19:40:00,747 INFO L226 Difference]: Without dead ends: 3314 [2021-07-13 19:40:00,747 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 710.2ms TimeCoverageRelationStatistics Valid=188, Invalid=1218, Unknown=0, NotChecked=0, Total=1406 [2021-07-13 19:40:00,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3314 states. [2021-07-13 19:40:00,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3314 to 2349. [2021-07-13 19:40:00,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2349 states, 2348 states have (on average 2.8390119250425894) internal successors, (6666), 2348 states have internal predecessors, (6666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:00,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2349 states to 2349 states and 6666 transitions. [2021-07-13 19:40:00,776 INFO L78 Accepts]: Start accepts. Automaton has 2349 states and 6666 transitions. Word has length 19 [2021-07-13 19:40:00,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:40:00,776 INFO L482 AbstractCegarLoop]: Abstraction has 2349 states and 6666 transitions. [2021-07-13 19:40:00,776 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:00,777 INFO L276 IsEmpty]: Start isEmpty. Operand 2349 states and 6666 transitions. [2021-07-13 19:40:00,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:40:00,779 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:40:00,779 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:40:00,979 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 554 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4241 [2021-07-13 19:40:00,979 INFO L430 AbstractCegarLoop]: === Iteration 564 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:40:00,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:40:00,980 INFO L82 PathProgramCache]: Analyzing trace with hash -1246633026, now seen corresponding path program 550 times [2021-07-13 19:40:00,980 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:40:00,980 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128733841] [2021-07-13 19:40:00,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:40:00,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:40:01,090 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:01,090 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:40:01,090 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128733841] [2021-07-13 19:40:01,090 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2128733841] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:01,090 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2020215549] [2021-07-13 19:40:01,091 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 555 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 555 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:01,119 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:40:01,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:40:01,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 19:40:01,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:40:01,322 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:40:01,323 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:01,325 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:40:01,326 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:01,328 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:01,329 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:01,329 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:40:01,330 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:01,332 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:01,333 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:01,333 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:40:01,333 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:01,336 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:40:01,336 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:01,338 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:40:01,339 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:01,369 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-07-13 19:40:01,369 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:40:01,370 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:40:01,370 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-07-13 19:40:01,400 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:01,400 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2020215549] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:01,400 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:40:01,400 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-07-13 19:40:01,400 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900021138] [2021-07-13 19:40:01,400 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 19:40:01,400 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:40:01,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 19:40:01,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=332, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:40:01,401 INFO L87 Difference]: Start difference. First operand 2349 states and 6666 transitions. Second operand has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:02,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:40:02,042 INFO L93 Difference]: Finished difference Result 3283 states and 9057 transitions. [2021-07-13 19:40:02,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 19:40:02,043 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:40:02,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:40:02,047 INFO L225 Difference]: With dead ends: 3283 [2021-07-13 19:40:02,047 INFO L226 Difference]: Without dead ends: 3279 [2021-07-13 19:40:02,047 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 572.8ms TimeCoverageRelationStatistics Valid=124, Invalid=932, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 19:40:02,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3279 states. [2021-07-13 19:40:02,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3279 to 2351. [2021-07-13 19:40:02,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2351 states, 2350 states have (on average 2.8387234042553193) internal successors, (6671), 2350 states have internal predecessors, (6671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:02,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2351 states to 2351 states and 6671 transitions. [2021-07-13 19:40:02,077 INFO L78 Accepts]: Start accepts. Automaton has 2351 states and 6671 transitions. Word has length 19 [2021-07-13 19:40:02,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:40:02,077 INFO L482 AbstractCegarLoop]: Abstraction has 2351 states and 6671 transitions. [2021-07-13 19:40:02,077 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:02,077 INFO L276 IsEmpty]: Start isEmpty. Operand 2351 states and 6671 transitions. [2021-07-13 19:40:02,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:40:02,079 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:40:02,079 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:40:02,280 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 555 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4244 [2021-07-13 19:40:02,280 INFO L430 AbstractCegarLoop]: === Iteration 565 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:40:02,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:40:02,280 INFO L82 PathProgramCache]: Analyzing trace with hash 956429568, now seen corresponding path program 551 times [2021-07-13 19:40:02,280 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:40:02,280 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758971454] [2021-07-13 19:40:02,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:40:02,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:40:02,391 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:02,391 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:40:02,391 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758971454] [2021-07-13 19:40:02,391 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1758971454] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:02,391 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1316417733] [2021-07-13 19:40:02,391 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 556 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 556 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:02,421 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:40:02,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:40:02,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 19:40:02,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:40:02,602 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:02,602 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:02,603 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:40:02,603 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:02,605 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:02,606 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:40:02,606 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:02,629 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-07-13 19:40:02,629 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:40:02,630 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:40:02,630 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-07-13 19:40:02,652 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:02,653 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1316417733] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:02,653 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:40:02,653 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-07-13 19:40:02,653 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626483265] [2021-07-13 19:40:02,653 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 19:40:02,653 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:40:02,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 19:40:02,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=330, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:40:02,653 INFO L87 Difference]: Start difference. First operand 2351 states and 6671 transitions. Second operand has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:04,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:40:04,393 INFO L93 Difference]: Finished difference Result 3492 states and 9443 transitions. [2021-07-13 19:40:04,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-07-13 19:40:04,393 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:40:04,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:40:04,397 INFO L225 Difference]: With dead ends: 3492 [2021-07-13 19:40:04,397 INFO L226 Difference]: Without dead ends: 3492 [2021-07-13 19:40:04,398 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1065 ImplicationChecksByTransitivity, 1263.0ms TimeCoverageRelationStatistics Valid=400, Invalid=3382, Unknown=0, NotChecked=0, Total=3782 [2021-07-13 19:40:04,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3492 states. [2021-07-13 19:40:04,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3492 to 2372. [2021-07-13 19:40:04,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2372 states, 2371 states have (on average 2.844369464361029) internal successors, (6744), 2371 states have internal predecessors, (6744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:04,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2372 states to 2372 states and 6744 transitions. [2021-07-13 19:40:04,438 INFO L78 Accepts]: Start accepts. Automaton has 2372 states and 6744 transitions. Word has length 19 [2021-07-13 19:40:04,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:40:04,438 INFO L482 AbstractCegarLoop]: Abstraction has 2372 states and 6744 transitions. [2021-07-13 19:40:04,438 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:04,438 INFO L276 IsEmpty]: Start isEmpty. Operand 2372 states and 6744 transitions. [2021-07-13 19:40:04,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:40:04,441 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:40:04,441 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:40:04,653 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 556 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4251 [2021-07-13 19:40:04,653 INFO L430 AbstractCegarLoop]: === Iteration 566 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:40:04,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:40:04,653 INFO L82 PathProgramCache]: Analyzing trace with hash -1784488604, now seen corresponding path program 552 times [2021-07-13 19:40:04,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:40:04,653 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912829289] [2021-07-13 19:40:04,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:40:04,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:40:04,781 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:04,781 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:40:04,781 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912829289] [2021-07-13 19:40:04,781 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1912829289] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:04,781 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2083505167] [2021-07-13 19:40:04,781 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 557 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 557 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:04,809 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:40:04,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:40:04,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 19:40:04,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:40:05,018 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:40:05,019 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:05,021 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:40:05,022 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:05,024 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:05,024 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:05,025 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:40:05,026 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:05,028 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:05,028 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:05,029 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:40:05,029 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:05,031 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:40:05,032 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:05,034 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:40:05,035 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:05,065 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-07-13 19:40:05,065 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:40:05,066 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:40:05,066 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-07-13 19:40:05,095 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:05,095 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2083505167] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:05,095 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:40:05,095 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-07-13 19:40:05,095 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765792453] [2021-07-13 19:40:05,095 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 19:40:05,095 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:40:05,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 19:40:05,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=330, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:40:05,096 INFO L87 Difference]: Start difference. First operand 2372 states and 6744 transitions. Second operand has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:05,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:40:05,723 INFO L93 Difference]: Finished difference Result 3307 states and 9136 transitions. [2021-07-13 19:40:05,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 19:40:05,724 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:40:05,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:40:05,729 INFO L225 Difference]: With dead ends: 3307 [2021-07-13 19:40:05,729 INFO L226 Difference]: Without dead ends: 3304 [2021-07-13 19:40:05,730 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 597.3ms TimeCoverageRelationStatistics Valid=122, Invalid=870, Unknown=0, NotChecked=0, Total=992 [2021-07-13 19:40:05,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3304 states. [2021-07-13 19:40:05,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3304 to 2374. [2021-07-13 19:40:05,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2374 states, 2373 states have (on average 2.8440792246101982) internal successors, (6749), 2373 states have internal predecessors, (6749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:05,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2374 states to 2374 states and 6749 transitions. [2021-07-13 19:40:05,766 INFO L78 Accepts]: Start accepts. Automaton has 2374 states and 6749 transitions. Word has length 19 [2021-07-13 19:40:05,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:40:05,766 INFO L482 AbstractCegarLoop]: Abstraction has 2374 states and 6749 transitions. [2021-07-13 19:40:05,766 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:05,766 INFO L276 IsEmpty]: Start isEmpty. Operand 2374 states and 6749 transitions. [2021-07-13 19:40:05,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:40:05,769 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:40:05,769 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:40:05,969 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4254,557 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:05,969 INFO L430 AbstractCegarLoop]: === Iteration 567 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:40:05,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:40:05,969 INFO L82 PathProgramCache]: Analyzing trace with hash 1196071906, now seen corresponding path program 553 times [2021-07-13 19:40:05,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:40:05,970 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5732809] [2021-07-13 19:40:05,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:40:05,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:40:06,083 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:06,083 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:40:06,083 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5732809] [2021-07-13 19:40:06,083 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [5732809] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:06,083 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [234151790] [2021-07-13 19:40:06,083 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 558 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 558 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:06,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:40:06,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 19:40:06,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:40:06,281 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:06,282 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:06,282 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:40:06,283 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:06,285 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:06,285 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:40:06,286 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:06,307 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-07-13 19:40:06,308 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:40:06,308 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:40:06,308 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-07-13 19:40:06,330 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:06,330 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [234151790] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:06,330 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:40:06,330 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-07-13 19:40:06,330 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014750303] [2021-07-13 19:40:06,330 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 19:40:06,330 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:40:06,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 19:40:06,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:40:06,330 INFO L87 Difference]: Start difference. First operand 2374 states and 6749 transitions. Second operand has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:07,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:40:07,252 INFO L93 Difference]: Finished difference Result 3443 states and 9382 transitions. [2021-07-13 19:40:07,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-07-13 19:40:07,252 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:40:07,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:40:07,257 INFO L225 Difference]: With dead ends: 3443 [2021-07-13 19:40:07,257 INFO L226 Difference]: Without dead ends: 3443 [2021-07-13 19:40:07,257 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 363 ImplicationChecksByTransitivity, 682.8ms TimeCoverageRelationStatistics Valid=192, Invalid=1530, Unknown=0, NotChecked=0, Total=1722 [2021-07-13 19:40:07,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3443 states. [2021-07-13 19:40:07,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3443 to 2389. [2021-07-13 19:40:07,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2389 states, 2388 states have (on average 2.8479899497487438) internal successors, (6801), 2388 states have internal predecessors, (6801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:07,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2389 states to 2389 states and 6801 transitions. [2021-07-13 19:40:07,291 INFO L78 Accepts]: Start accepts. Automaton has 2389 states and 6801 transitions. Word has length 19 [2021-07-13 19:40:07,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:40:07,291 INFO L482 AbstractCegarLoop]: Abstraction has 2389 states and 6801 transitions. [2021-07-13 19:40:07,291 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:07,291 INFO L276 IsEmpty]: Start isEmpty. Operand 2389 states and 6801 transitions. [2021-07-13 19:40:07,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:40:07,294 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:40:07,294 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:40:07,494 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 558 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4261 [2021-07-13 19:40:07,494 INFO L430 AbstractCegarLoop]: === Iteration 568 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:40:07,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:40:07,495 INFO L82 PathProgramCache]: Analyzing trace with hash 276371198, now seen corresponding path program 554 times [2021-07-13 19:40:07,495 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:40:07,495 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882317902] [2021-07-13 19:40:07,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:40:07,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:40:07,617 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:07,617 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:40:07,617 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882317902] [2021-07-13 19:40:07,617 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [882317902] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:07,617 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1002162732] [2021-07-13 19:40:07,617 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 559 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 559 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:07,645 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:40:07,645 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:40:07,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 19:40:07,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:40:07,875 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:40:07,875 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:07,882 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:40:07,883 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:07,885 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:07,885 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:07,886 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:40:07,887 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:07,889 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:07,890 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:07,890 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:40:07,890 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:07,892 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:40:07,893 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:07,895 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:40:07,896 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:07,927 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-07-13 19:40:07,927 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:40:07,928 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:40:07,928 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-07-13 19:40:07,960 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:07,960 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1002162732] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:07,960 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:40:07,960 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-07-13 19:40:07,960 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17321681] [2021-07-13 19:40:07,960 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 19:40:07,960 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:40:07,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 19:40:07,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:40:07,961 INFO L87 Difference]: Start difference. First operand 2389 states and 6801 transitions. Second operand has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:08,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:40:08,518 INFO L93 Difference]: Finished difference Result 3324 states and 9193 transitions. [2021-07-13 19:40:08,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 19:40:08,519 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:40:08,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:40:08,523 INFO L225 Difference]: With dead ends: 3324 [2021-07-13 19:40:08,523 INFO L226 Difference]: Without dead ends: 3322 [2021-07-13 19:40:08,523 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 560.4ms TimeCoverageRelationStatistics Valid=120, Invalid=810, Unknown=0, NotChecked=0, Total=930 [2021-07-13 19:40:08,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3322 states. [2021-07-13 19:40:08,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3322 to 2391. [2021-07-13 19:40:08,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2391 states, 2390 states have (on average 2.8476987447698745) internal successors, (6806), 2390 states have internal predecessors, (6806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:08,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2391 states to 2391 states and 6806 transitions. [2021-07-13 19:40:08,553 INFO L78 Accepts]: Start accepts. Automaton has 2391 states and 6806 transitions. Word has length 19 [2021-07-13 19:40:08,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:40:08,553 INFO L482 AbstractCegarLoop]: Abstraction has 2391 states and 6806 transitions. [2021-07-13 19:40:08,553 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:08,553 INFO L276 IsEmpty]: Start isEmpty. Operand 2391 states and 6806 transitions. [2021-07-13 19:40:08,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:40:08,556 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:40:08,556 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:40:08,756 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 559 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4264 [2021-07-13 19:40:08,756 INFO L430 AbstractCegarLoop]: === Iteration 569 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:40:08,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:40:08,756 INFO L82 PathProgramCache]: Analyzing trace with hash 1203802304, now seen corresponding path program 555 times [2021-07-13 19:40:08,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:40:08,757 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671295987] [2021-07-13 19:40:08,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:40:08,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:40:08,873 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:08,873 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:40:08,874 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671295987] [2021-07-13 19:40:08,874 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [671295987] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:08,874 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [523440285] [2021-07-13 19:40:08,874 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 560 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 560 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:08,902 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-13 19:40:08,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:40:08,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 19:40:08,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:40:09,068 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:09,068 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:09,069 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:40:09,069 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:09,071 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:09,072 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:09,072 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:40:09,073 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:09,075 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:09,075 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:09,075 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:40:09,076 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:09,078 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:09,078 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:40:09,079 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:09,112 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-07-13 19:40:09,112 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:40:09,112 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:40:09,113 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-07-13 19:40:09,170 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:09,171 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [523440285] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:09,171 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:40:09,171 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-07-13 19:40:09,171 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377975548] [2021-07-13 19:40:09,171 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 19:40:09,171 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:40:09,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 19:40:09,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:40:09,171 INFO L87 Difference]: Start difference. First operand 2391 states and 6806 transitions. Second operand has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:10,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:40:10,025 INFO L93 Difference]: Finished difference Result 3441 states and 9378 transitions. [2021-07-13 19:40:10,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-13 19:40:10,026 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:40:10,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:40:10,031 INFO L225 Difference]: With dead ends: 3441 [2021-07-13 19:40:10,031 INFO L226 Difference]: Without dead ends: 3441 [2021-07-13 19:40:10,031 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 716.0ms TimeCoverageRelationStatistics Valid=151, Invalid=1109, Unknown=0, NotChecked=0, Total=1260 [2021-07-13 19:40:10,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3441 states. [2021-07-13 19:40:10,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3441 to 2400. [2021-07-13 19:40:10,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2400 states, 2399 states have (on average 2.850354314297624) internal successors, (6838), 2399 states have internal predecessors, (6838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:10,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2400 states to 2400 states and 6838 transitions. [2021-07-13 19:40:10,065 INFO L78 Accepts]: Start accepts. Automaton has 2400 states and 6838 transitions. Word has length 19 [2021-07-13 19:40:10,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:40:10,065 INFO L482 AbstractCegarLoop]: Abstraction has 2400 states and 6838 transitions. [2021-07-13 19:40:10,065 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:10,065 INFO L276 IsEmpty]: Start isEmpty. Operand 2400 states and 6838 transitions. [2021-07-13 19:40:10,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:40:10,077 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:40:10,077 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:40:10,278 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4271,560 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:10,278 INFO L430 AbstractCegarLoop]: === Iteration 570 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:40:10,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:40:10,278 INFO L82 PathProgramCache]: Analyzing trace with hash 2005418532, now seen corresponding path program 556 times [2021-07-13 19:40:10,278 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:40:10,278 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079614373] [2021-07-13 19:40:10,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:40:10,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:40:10,406 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:10,407 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:40:10,407 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079614373] [2021-07-13 19:40:10,407 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2079614373] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:10,407 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [8223069] [2021-07-13 19:40:10,407 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 561 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 561 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:10,434 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:40:10,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:40:10,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 19:40:10,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:40:10,587 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:10,587 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:10,587 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:40:10,588 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:10,590 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:10,591 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:10,591 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:40:10,591 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:10,594 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:10,594 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:10,594 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:40:10,595 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:10,597 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:10,597 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:40:10,598 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:10,630 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-07-13 19:40:10,630 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:40:10,631 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:40:10,631 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-07-13 19:40:10,698 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:10,698 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [8223069] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:10,698 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:40:10,699 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-07-13 19:40:10,699 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29983337] [2021-07-13 19:40:10,699 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 19:40:10,699 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:40:10,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 19:40:10,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:40:10,699 INFO L87 Difference]: Start difference. First operand 2400 states and 6838 transitions. Second operand has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:11,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:40:11,473 INFO L93 Difference]: Finished difference Result 3362 states and 9269 transitions. [2021-07-13 19:40:11,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-13 19:40:11,473 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:40:11,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:40:11,477 INFO L225 Difference]: With dead ends: 3362 [2021-07-13 19:40:11,477 INFO L226 Difference]: Without dead ends: 3359 [2021-07-13 19:40:11,477 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 758.2ms TimeCoverageRelationStatistics Valid=169, Invalid=1021, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 19:40:11,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3359 states. [2021-07-13 19:40:11,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3359 to 2402. [2021-07-13 19:40:11,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2402 states, 2401 states have (on average 2.8504789670970427) internal successors, (6844), 2401 states have internal predecessors, (6844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:11,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2402 states to 2402 states and 6844 transitions. [2021-07-13 19:40:11,507 INFO L78 Accepts]: Start accepts. Automaton has 2402 states and 6844 transitions. Word has length 19 [2021-07-13 19:40:11,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:40:11,507 INFO L482 AbstractCegarLoop]: Abstraction has 2402 states and 6844 transitions. [2021-07-13 19:40:11,507 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:11,507 INFO L276 IsEmpty]: Start isEmpty. Operand 2402 states and 6844 transitions. [2021-07-13 19:40:11,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:40:11,509 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:40:11,509 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:40:11,710 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 561 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4275 [2021-07-13 19:40:11,710 INFO L430 AbstractCegarLoop]: === Iteration 571 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:40:11,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:40:11,710 INFO L82 PathProgramCache]: Analyzing trace with hash -571205058, now seen corresponding path program 557 times [2021-07-13 19:40:11,710 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:40:11,710 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287124382] [2021-07-13 19:40:11,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:40:11,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:40:11,829 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:11,830 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:40:11,830 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287124382] [2021-07-13 19:40:11,830 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1287124382] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:11,830 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [146835728] [2021-07-13 19:40:11,830 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 562 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 562 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:11,858 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:40:11,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:40:11,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 19:40:11,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:40:11,996 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:11,997 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:11,997 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:40:11,998 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:12,000 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:12,000 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:12,000 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:40:12,001 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:12,003 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:12,003 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:12,004 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:40:12,004 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:12,006 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:12,006 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:40:12,007 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:12,039 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-07-13 19:40:12,039 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:40:12,040 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:40:12,040 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-07-13 19:40:12,094 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:12,094 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [146835728] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:12,094 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:40:12,094 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-07-13 19:40:12,094 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382238254] [2021-07-13 19:40:12,095 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 19:40:12,095 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:40:12,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 19:40:12,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:40:12,095 INFO L87 Difference]: Start difference. First operand 2402 states and 6844 transitions. Second operand has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:12,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:40:12,584 INFO L93 Difference]: Finished difference Result 3351 states and 9253 transitions. [2021-07-13 19:40:12,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 19:40:12,584 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:40:12,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:40:12,588 INFO L225 Difference]: With dead ends: 3351 [2021-07-13 19:40:12,588 INFO L226 Difference]: Without dead ends: 3351 [2021-07-13 19:40:12,588 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 486.0ms TimeCoverageRelationStatistics Valid=106, Invalid=544, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:40:12,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3351 states. [2021-07-13 19:40:12,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3351 to 2400. [2021-07-13 19:40:12,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2400 states, 2399 states have (on average 2.8495206335973324) internal successors, (6836), 2399 states have internal predecessors, (6836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:12,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2400 states to 2400 states and 6836 transitions. [2021-07-13 19:40:12,617 INFO L78 Accepts]: Start accepts. Automaton has 2400 states and 6836 transitions. Word has length 19 [2021-07-13 19:40:12,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:40:12,617 INFO L482 AbstractCegarLoop]: Abstraction has 2400 states and 6836 transitions. [2021-07-13 19:40:12,617 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:12,617 INFO L276 IsEmpty]: Start isEmpty. Operand 2400 states and 6836 transitions. [2021-07-13 19:40:12,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:40:12,620 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:40:12,620 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:40:12,820 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 562 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4281 [2021-07-13 19:40:12,820 INFO L430 AbstractCegarLoop]: === Iteration 572 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:40:12,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:40:12,820 INFO L82 PathProgramCache]: Analyzing trace with hash 1144374456, now seen corresponding path program 558 times [2021-07-13 19:40:12,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:40:12,821 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948220473] [2021-07-13 19:40:12,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:40:12,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:40:12,921 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:12,922 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:40:12,922 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948220473] [2021-07-13 19:40:12,922 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1948220473] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:12,922 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1468080822] [2021-07-13 19:40:12,922 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 563 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 563 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:12,954 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:40:12,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:40:12,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 19:40:12,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:40:13,113 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:13,113 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:13,113 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:40:13,114 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:13,116 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:13,116 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:40:13,117 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:13,139 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-07-13 19:40:13,139 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:40:13,139 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:40:13,140 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-07-13 19:40:13,165 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:13,165 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1468080822] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:13,165 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:40:13,165 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-07-13 19:40:13,165 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020829752] [2021-07-13 19:40:13,166 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 19:40:13,166 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:40:13,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 19:40:13,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=335, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:40:13,166 INFO L87 Difference]: Start difference. First operand 2400 states and 6836 transitions. Second operand has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:13,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:40:13,451 INFO L93 Difference]: Finished difference Result 2744 states and 7675 transitions. [2021-07-13 19:40:13,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 19:40:13,452 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:40:13,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:40:13,455 INFO L225 Difference]: With dead ends: 2744 [2021-07-13 19:40:13,455 INFO L226 Difference]: Without dead ends: 2744 [2021-07-13 19:40:13,455 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 223.1ms TimeCoverageRelationStatistics Valid=45, Invalid=335, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:40:13,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2744 states. [2021-07-13 19:40:13,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2744 to 2406. [2021-07-13 19:40:13,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2406 states, 2405 states have (on average 2.849064449064449) internal successors, (6852), 2405 states have internal predecessors, (6852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:13,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2406 states to 2406 states and 6852 transitions. [2021-07-13 19:40:13,482 INFO L78 Accepts]: Start accepts. Automaton has 2406 states and 6852 transitions. Word has length 19 [2021-07-13 19:40:13,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:40:13,483 INFO L482 AbstractCegarLoop]: Abstraction has 2406 states and 6852 transitions. [2021-07-13 19:40:13,483 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:13,483 INFO L276 IsEmpty]: Start isEmpty. Operand 2406 states and 6852 transitions. [2021-07-13 19:40:13,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:40:13,485 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:40:13,485 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:40:13,685 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 563 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4285 [2021-07-13 19:40:13,686 INFO L430 AbstractCegarLoop]: === Iteration 573 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:40:13,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:40:13,686 INFO L82 PathProgramCache]: Analyzing trace with hash -63036388, now seen corresponding path program 559 times [2021-07-13 19:40:13,686 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:40:13,686 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769638997] [2021-07-13 19:40:13,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:40:13,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:40:13,803 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:13,803 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:40:13,803 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769638997] [2021-07-13 19:40:13,803 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1769638997] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:13,803 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [363861436] [2021-07-13 19:40:13,803 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 564 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 564 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:13,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:40:13,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 19:40:13,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:40:14,031 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:40:14,032 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:14,035 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:40:14,036 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:14,038 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:14,039 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:14,039 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:40:14,040 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:14,043 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:14,043 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:14,044 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:40:14,045 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:14,047 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:40:14,048 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:14,050 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:40:14,051 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:14,083 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-07-13 19:40:14,083 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:40:14,084 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:40:14,084 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-07-13 19:40:14,113 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:14,113 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [363861436] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:14,114 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:40:14,114 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-07-13 19:40:14,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391688902] [2021-07-13 19:40:14,114 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 19:40:14,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:40:14,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 19:40:14,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=335, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:40:14,114 INFO L87 Difference]: Start difference. First operand 2406 states and 6852 transitions. Second operand has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:14,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:40:14,516 INFO L93 Difference]: Finished difference Result 2733 states and 7643 transitions. [2021-07-13 19:40:14,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-13 19:40:14,517 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:40:14,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:40:14,521 INFO L225 Difference]: With dead ends: 2733 [2021-07-13 19:40:14,521 INFO L226 Difference]: Without dead ends: 2728 [2021-07-13 19:40:14,521 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 416.0ms TimeCoverageRelationStatistics Valid=81, Invalid=675, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:40:14,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2728 states. [2021-07-13 19:40:14,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2728 to 2409. [2021-07-13 19:40:14,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2409 states, 2408 states have (on average 2.846345514950166) internal successors, (6854), 2408 states have internal predecessors, (6854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:14,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2409 states to 2409 states and 6854 transitions. [2021-07-13 19:40:14,548 INFO L78 Accepts]: Start accepts. Automaton has 2409 states and 6854 transitions. Word has length 19 [2021-07-13 19:40:14,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:40:14,548 INFO L482 AbstractCegarLoop]: Abstraction has 2409 states and 6854 transitions. [2021-07-13 19:40:14,548 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:14,548 INFO L276 IsEmpty]: Start isEmpty. Operand 2409 states and 6854 transitions. [2021-07-13 19:40:14,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:40:14,550 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:40:14,551 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:40:14,751 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 564 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4288 [2021-07-13 19:40:14,751 INFO L430 AbstractCegarLoop]: === Iteration 574 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:40:14,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:40:14,751 INFO L82 PathProgramCache]: Analyzing trace with hash -487572710, now seen corresponding path program 560 times [2021-07-13 19:40:14,751 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:40:14,751 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589747571] [2021-07-13 19:40:14,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:40:14,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:40:14,863 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:14,863 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:40:14,863 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589747571] [2021-07-13 19:40:14,863 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1589747571] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:14,863 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2040581078] [2021-07-13 19:40:14,864 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 565 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 565 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:14,891 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:40:14,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:40:14,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 19:40:14,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:40:15,064 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:15,065 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:15,065 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:40:15,066 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:15,068 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:15,069 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:40:15,069 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:15,092 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-07-13 19:40:15,092 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:40:15,093 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:40:15,093 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-07-13 19:40:15,121 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:15,121 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2040581078] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:15,121 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:40:15,121 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-07-13 19:40:15,121 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320345338] [2021-07-13 19:40:15,122 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 19:40:15,122 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:40:15,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 19:40:15,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:40:15,122 INFO L87 Difference]: Start difference. First operand 2409 states and 6854 transitions. Second operand has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:16,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:40:16,089 INFO L93 Difference]: Finished difference Result 2767 states and 7721 transitions. [2021-07-13 19:40:16,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-13 19:40:16,089 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:40:16,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:40:16,093 INFO L225 Difference]: With dead ends: 2767 [2021-07-13 19:40:16,093 INFO L226 Difference]: Without dead ends: 2767 [2021-07-13 19:40:16,093 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 760.4ms TimeCoverageRelationStatistics Valid=186, Invalid=1220, Unknown=0, NotChecked=0, Total=1406 [2021-07-13 19:40:16,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2767 states. [2021-07-13 19:40:16,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2767 to 2405. [2021-07-13 19:40:16,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2405 states, 2404 states have (on average 2.8494176372712148) internal successors, (6850), 2404 states have internal predecessors, (6850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:16,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2405 states to 2405 states and 6850 transitions. [2021-07-13 19:40:16,126 INFO L78 Accepts]: Start accepts. Automaton has 2405 states and 6850 transitions. Word has length 19 [2021-07-13 19:40:16,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:40:16,127 INFO L482 AbstractCegarLoop]: Abstraction has 2405 states and 6850 transitions. [2021-07-13 19:40:16,127 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:16,127 INFO L276 IsEmpty]: Start isEmpty. Operand 2405 states and 6850 transitions. [2021-07-13 19:40:16,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:40:16,129 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:40:16,129 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:40:16,337 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4295,565 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:16,338 INFO L430 AbstractCegarLoop]: === Iteration 575 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:40:16,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:40:16,338 INFO L82 PathProgramCache]: Analyzing trace with hash 443309878, now seen corresponding path program 561 times [2021-07-13 19:40:16,338 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:40:16,338 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219491245] [2021-07-13 19:40:16,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:40:16,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:40:16,454 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:16,454 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:40:16,454 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219491245] [2021-07-13 19:40:16,454 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [219491245] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:16,454 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1827663279] [2021-07-13 19:40:16,455 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 566 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 566 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:16,486 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:40:16,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:40:16,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 19:40:16,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:40:16,672 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:40:16,673 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:16,675 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:40:16,676 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:16,679 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:16,679 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:16,679 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:40:16,680 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:16,682 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:16,683 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:16,683 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:40:16,684 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:16,686 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:40:16,687 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:16,689 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:40:16,689 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:16,719 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-07-13 19:40:16,719 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:40:16,720 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:40:16,720 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-07-13 19:40:16,749 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:16,749 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1827663279] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:16,749 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:40:16,749 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-07-13 19:40:16,749 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464247496] [2021-07-13 19:40:16,750 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 19:40:16,750 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:40:16,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 19:40:16,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:40:16,750 INFO L87 Difference]: Start difference. First operand 2405 states and 6850 transitions. Second operand has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:17,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:40:17,066 INFO L93 Difference]: Finished difference Result 2727 states and 7638 transitions. [2021-07-13 19:40:17,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 19:40:17,067 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:40:17,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:40:17,070 INFO L225 Difference]: With dead ends: 2727 [2021-07-13 19:40:17,070 INFO L226 Difference]: Without dead ends: 2723 [2021-07-13 19:40:17,070 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 372.6ms TimeCoverageRelationStatistics Valid=74, Invalid=576, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:40:17,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2723 states. [2021-07-13 19:40:17,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2723 to 2406. [2021-07-13 19:40:17,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2406 states, 2405 states have (on average 2.849064449064449) internal successors, (6852), 2405 states have internal predecessors, (6852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:17,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2406 states to 2406 states and 6852 transitions. [2021-07-13 19:40:17,097 INFO L78 Accepts]: Start accepts. Automaton has 2406 states and 6852 transitions. Word has length 19 [2021-07-13 19:40:17,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:40:17,097 INFO L482 AbstractCegarLoop]: Abstraction has 2406 states and 6852 transitions. [2021-07-13 19:40:17,097 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:17,097 INFO L276 IsEmpty]: Start isEmpty. Operand 2406 states and 6852 transitions. [2021-07-13 19:40:17,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:40:17,100 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:40:17,100 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:40:17,300 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 566 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4298 [2021-07-13 19:40:17,300 INFO L430 AbstractCegarLoop]: === Iteration 576 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:40:17,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:40:17,300 INFO L82 PathProgramCache]: Analyzing trace with hash -1648594824, now seen corresponding path program 562 times [2021-07-13 19:40:17,300 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:40:17,300 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843355250] [2021-07-13 19:40:17,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:40:17,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:40:17,481 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:17,481 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:40:17,481 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843355250] [2021-07-13 19:40:17,481 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [843355250] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:17,481 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [707957234] [2021-07-13 19:40:17,481 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 567 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 567 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:17,508 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:40:17,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:40:17,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 19:40:17,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:40:17,678 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:17,678 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:17,678 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:40:17,679 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:17,681 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:17,681 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:40:17,682 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:17,704 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-07-13 19:40:17,704 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:40:17,705 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:40:17,705 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-07-13 19:40:17,729 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:17,729 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [707957234] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:17,729 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:40:17,729 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-07-13 19:40:17,729 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805008125] [2021-07-13 19:40:17,729 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 19:40:17,730 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:40:17,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 19:40:17,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:40:17,730 INFO L87 Difference]: Start difference. First operand 2406 states and 6852 transitions. Second operand has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:19,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:40:19,364 INFO L93 Difference]: Finished difference Result 2939 states and 8028 transitions. [2021-07-13 19:40:19,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-07-13 19:40:19,364 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:40:19,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:40:19,368 INFO L225 Difference]: With dead ends: 2939 [2021-07-13 19:40:19,368 INFO L226 Difference]: Without dead ends: 2939 [2021-07-13 19:40:19,368 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1040 ImplicationChecksByTransitivity, 1413.2ms TimeCoverageRelationStatistics Valid=404, Invalid=3378, Unknown=0, NotChecked=0, Total=3782 [2021-07-13 19:40:19,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2939 states. [2021-07-13 19:40:19,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2939 to 2427. [2021-07-13 19:40:19,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2427 states, 2426 states have (on average 2.8544929925803793) internal successors, (6925), 2426 states have internal predecessors, (6925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:19,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2427 states to 2427 states and 6925 transitions. [2021-07-13 19:40:19,396 INFO L78 Accepts]: Start accepts. Automaton has 2427 states and 6925 transitions. Word has length 19 [2021-07-13 19:40:19,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:40:19,396 INFO L482 AbstractCegarLoop]: Abstraction has 2427 states and 6925 transitions. [2021-07-13 19:40:19,396 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:19,396 INFO L276 IsEmpty]: Start isEmpty. Operand 2427 states and 6925 transitions. [2021-07-13 19:40:19,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:40:19,398 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:40:19,399 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:40:19,599 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4305,567 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:19,599 INFO L430 AbstractCegarLoop]: === Iteration 577 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:40:19,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:40:19,599 INFO L82 PathProgramCache]: Analyzing trace with hash -94545700, now seen corresponding path program 563 times [2021-07-13 19:40:19,599 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:40:19,599 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863299842] [2021-07-13 19:40:19,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:40:19,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:40:19,708 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:19,708 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:40:19,708 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863299842] [2021-07-13 19:40:19,708 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1863299842] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:19,709 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [330634403] [2021-07-13 19:40:19,709 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 568 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 568 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:19,736 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:40:19,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:40:19,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 19:40:19,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:40:19,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:40:19,929 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:19,931 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:40:19,932 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:19,934 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:19,935 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:19,935 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:40:19,936 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:19,938 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:19,939 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:19,939 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:40:19,939 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:19,941 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:40:19,942 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:19,944 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:40:19,945 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:19,974 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-07-13 19:40:19,974 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:40:19,975 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:40:19,975 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-07-13 19:40:20,004 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:20,004 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [330634403] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:20,004 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:40:20,005 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-07-13 19:40:20,005 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051093644] [2021-07-13 19:40:20,005 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 19:40:20,005 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:40:20,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 19:40:20,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:40:20,005 INFO L87 Difference]: Start difference. First operand 2427 states and 6925 transitions. Second operand has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:20,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:40:20,386 INFO L93 Difference]: Finished difference Result 2764 states and 7736 transitions. [2021-07-13 19:40:20,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-13 19:40:20,386 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:40:20,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:40:20,390 INFO L225 Difference]: With dead ends: 2764 [2021-07-13 19:40:20,390 INFO L226 Difference]: Without dead ends: 2761 [2021-07-13 19:40:20,390 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 404.1ms TimeCoverageRelationStatistics Valid=82, Invalid=674, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:40:20,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2761 states. [2021-07-13 19:40:20,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2761 to 2433. [2021-07-13 19:40:20,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2433 states, 2432 states have (on average 2.8536184210526314) internal successors, (6940), 2432 states have internal predecessors, (6940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:20,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2433 states to 2433 states and 6940 transitions. [2021-07-13 19:40:20,417 INFO L78 Accepts]: Start accepts. Automaton has 2433 states and 6940 transitions. Word has length 19 [2021-07-13 19:40:20,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:40:20,417 INFO L482 AbstractCegarLoop]: Abstraction has 2433 states and 6940 transitions. [2021-07-13 19:40:20,417 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:20,418 INFO L276 IsEmpty]: Start isEmpty. Operand 2433 states and 6940 transitions. [2021-07-13 19:40:20,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:40:20,420 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:40:20,420 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:40:20,620 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 568 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4308 [2021-07-13 19:40:20,621 INFO L430 AbstractCegarLoop]: === Iteration 578 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:40:20,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:40:20,621 INFO L82 PathProgramCache]: Analyzing trace with hash -1408952486, now seen corresponding path program 564 times [2021-07-13 19:40:20,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:40:20,621 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605566724] [2021-07-13 19:40:20,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:40:20,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:40:20,739 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:20,739 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:40:20,739 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605566724] [2021-07-13 19:40:20,740 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [605566724] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:20,740 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2015816706] [2021-07-13 19:40:20,740 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 569 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 569 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:20,768 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:40:20,768 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:40:20,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 19:40:20,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:40:20,941 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:20,941 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:20,942 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:40:20,942 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:20,945 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:20,945 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:40:20,946 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:20,967 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-07-13 19:40:20,968 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:40:20,968 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:40:20,968 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-07-13 19:40:20,995 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:20,995 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2015816706] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:20,995 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:40:20,995 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-07-13 19:40:20,995 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809176583] [2021-07-13 19:40:20,996 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 19:40:20,996 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:40:20,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 19:40:20,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:40:20,996 INFO L87 Difference]: Start difference. First operand 2433 states and 6940 transitions. Second operand has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:21,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:40:21,961 INFO L93 Difference]: Finished difference Result 2909 states and 8003 transitions. [2021-07-13 19:40:21,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-07-13 19:40:21,961 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:40:21,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:40:21,965 INFO L225 Difference]: With dead ends: 2909 [2021-07-13 19:40:21,965 INFO L226 Difference]: Without dead ends: 2909 [2021-07-13 19:40:21,965 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 426 ImplicationChecksByTransitivity, 778.9ms TimeCoverageRelationStatistics Valid=219, Invalid=1761, Unknown=0, NotChecked=0, Total=1980 [2021-07-13 19:40:21,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2909 states. [2021-07-13 19:40:21,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2909 to 2448. [2021-07-13 19:40:21,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2448 states, 2447 states have (on average 2.8573763792398856) internal successors, (6992), 2447 states have internal predecessors, (6992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:21,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2448 states to 2448 states and 6992 transitions. [2021-07-13 19:40:21,994 INFO L78 Accepts]: Start accepts. Automaton has 2448 states and 6992 transitions. Word has length 19 [2021-07-13 19:40:21,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:40:21,994 INFO L482 AbstractCegarLoop]: Abstraction has 2448 states and 6992 transitions. [2021-07-13 19:40:21,994 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:21,994 INFO L276 IsEmpty]: Start isEmpty. Operand 2448 states and 6992 transitions. [2021-07-13 19:40:21,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:40:21,996 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:40:21,996 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:40:22,197 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 569 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4315 [2021-07-13 19:40:22,197 INFO L430 AbstractCegarLoop]: === Iteration 579 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:40:22,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:40:22,197 INFO L82 PathProgramCache]: Analyzing trace with hash 1966314102, now seen corresponding path program 565 times [2021-07-13 19:40:22,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:40:22,197 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494439889] [2021-07-13 19:40:22,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:40:22,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:40:22,322 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:22,322 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:40:22,323 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494439889] [2021-07-13 19:40:22,323 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [494439889] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:22,323 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1315789225] [2021-07-13 19:40:22,323 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 570 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 570 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:22,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:40:22,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 19:40:22,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:40:22,532 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:40:22,533 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:22,535 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:40:22,536 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:22,538 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:22,539 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:22,539 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:40:22,540 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:22,542 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:22,542 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:22,542 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:40:22,543 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:22,545 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:40:22,546 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:22,548 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:40:22,549 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:22,579 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-07-13 19:40:22,579 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:40:22,580 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:40:22,580 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-07-13 19:40:22,610 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:22,610 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1315789225] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:22,610 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:40:22,610 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-07-13 19:40:22,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667310762] [2021-07-13 19:40:22,611 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 19:40:22,611 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:40:22,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 19:40:22,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:40:22,611 INFO L87 Difference]: Start difference. First operand 2448 states and 6992 transitions. Second operand has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:23,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:40:23,077 INFO L93 Difference]: Finished difference Result 2791 states and 7810 transitions. [2021-07-13 19:40:23,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 19:40:23,077 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:40:23,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:40:23,081 INFO L225 Difference]: With dead ends: 2791 [2021-07-13 19:40:23,081 INFO L226 Difference]: Without dead ends: 2789 [2021-07-13 19:40:23,081 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 440.8ms TimeCoverageRelationStatistics Valid=89, Invalid=723, Unknown=0, NotChecked=0, Total=812 [2021-07-13 19:40:23,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2789 states. [2021-07-13 19:40:23,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2789 to 2451. [2021-07-13 19:40:23,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2451 states, 2450 states have (on average 2.857551020408163) internal successors, (7001), 2450 states have internal predecessors, (7001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:23,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2451 states to 2451 states and 7001 transitions. [2021-07-13 19:40:23,107 INFO L78 Accepts]: Start accepts. Automaton has 2451 states and 7001 transitions. Word has length 19 [2021-07-13 19:40:23,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:40:23,107 INFO L482 AbstractCegarLoop]: Abstraction has 2451 states and 7001 transitions. [2021-07-13 19:40:23,108 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:23,108 INFO L276 IsEmpty]: Start isEmpty. Operand 2451 states and 7001 transitions. [2021-07-13 19:40:23,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:40:23,110 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:40:23,110 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:40:23,310 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4318,570 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:23,310 INFO L430 AbstractCegarLoop]: === Iteration 580 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:40:23,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:40:23,311 INFO L82 PathProgramCache]: Analyzing trace with hash -1401222088, now seen corresponding path program 566 times [2021-07-13 19:40:23,311 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:40:23,311 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54050716] [2021-07-13 19:40:23,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:40:23,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:40:23,437 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:23,437 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:40:23,437 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54050716] [2021-07-13 19:40:23,437 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [54050716] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:23,437 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [451305592] [2021-07-13 19:40:23,437 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 571 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 571 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:23,465 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:40:23,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:40:23,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 19:40:23,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:40:23,593 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:23,593 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:23,593 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:40:23,594 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:23,596 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:23,596 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:23,597 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:40:23,597 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:23,599 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:23,600 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:23,600 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:40:23,601 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:23,603 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:23,603 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:40:23,604 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:23,636 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-07-13 19:40:23,636 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:40:23,636 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:40:23,636 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-07-13 19:40:23,689 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:23,689 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [451305592] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:23,689 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:40:23,689 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-07-13 19:40:23,689 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729169409] [2021-07-13 19:40:23,689 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 19:40:23,689 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:40:23,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 19:40:23,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:40:23,690 INFO L87 Difference]: Start difference. First operand 2451 states and 7001 transitions. Second operand has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:24,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:40:24,450 INFO L93 Difference]: Finished difference Result 2910 states and 8009 transitions. [2021-07-13 19:40:24,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-13 19:40:24,450 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:40:24,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:40:24,454 INFO L225 Difference]: With dead ends: 2910 [2021-07-13 19:40:24,454 INFO L226 Difference]: Without dead ends: 2910 [2021-07-13 19:40:24,455 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 605.3ms TimeCoverageRelationStatistics Valid=140, Invalid=1050, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 19:40:24,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2910 states. [2021-07-13 19:40:24,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2910 to 2417. [2021-07-13 19:40:24,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2417 states, 2416 states have (on average 2.8489238410596025) internal successors, (6883), 2416 states have internal predecessors, (6883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:24,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2417 states to 2417 states and 6883 transitions. [2021-07-13 19:40:24,491 INFO L78 Accepts]: Start accepts. Automaton has 2417 states and 6883 transitions. Word has length 19 [2021-07-13 19:40:24,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:40:24,491 INFO L482 AbstractCegarLoop]: Abstraction has 2417 states and 6883 transitions. [2021-07-13 19:40:24,491 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:24,491 INFO L276 IsEmpty]: Start isEmpty. Operand 2417 states and 6883 transitions. [2021-07-13 19:40:24,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:40:24,493 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:40:24,493 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:40:24,694 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 571 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4325 [2021-07-13 19:40:24,694 INFO L430 AbstractCegarLoop]: === Iteration 581 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:40:24,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:40:24,694 INFO L82 PathProgramCache]: Analyzing trace with hash -599605860, now seen corresponding path program 567 times [2021-07-13 19:40:24,694 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:40:24,694 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604243093] [2021-07-13 19:40:24,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:40:24,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:40:24,855 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:24,855 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:40:24,855 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604243093] [2021-07-13 19:40:24,855 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [604243093] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:24,855 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [419585422] [2021-07-13 19:40:24,855 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 572 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 572 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:24,920 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 19:40:24,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:40:24,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 19:40:24,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:40:25,065 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:25,065 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:25,066 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:40:25,066 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:25,068 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:25,069 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:25,069 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:40:25,070 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:25,072 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:25,072 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:25,072 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:40:25,073 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:25,075 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:25,075 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:40:25,076 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:25,109 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-07-13 19:40:25,110 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:40:25,110 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:40:25,110 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-07-13 19:40:25,187 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:25,187 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [419585422] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:25,187 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:40:25,187 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-07-13 19:40:25,187 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977819267] [2021-07-13 19:40:25,187 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 19:40:25,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:40:25,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 19:40:25,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:40:25,188 INFO L87 Difference]: Start difference. First operand 2417 states and 6883 transitions. Second operand has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:25,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:40:25,711 INFO L93 Difference]: Finished difference Result 2771 states and 7716 transitions. [2021-07-13 19:40:25,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-13 19:40:25,712 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:40:25,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:40:25,715 INFO L225 Difference]: With dead ends: 2771 [2021-07-13 19:40:25,715 INFO L226 Difference]: Without dead ends: 2768 [2021-07-13 19:40:25,715 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 488.9ms TimeCoverageRelationStatistics Valid=100, Invalid=770, Unknown=0, NotChecked=0, Total=870 [2021-07-13 19:40:25,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2768 states. [2021-07-13 19:40:25,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2768 to 2419. [2021-07-13 19:40:25,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2419 states, 2418 states have (on average 2.849048800661704) internal successors, (6889), 2418 states have internal predecessors, (6889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:25,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2419 states to 2419 states and 6889 transitions. [2021-07-13 19:40:25,751 INFO L78 Accepts]: Start accepts. Automaton has 2419 states and 6889 transitions. Word has length 19 [2021-07-13 19:40:25,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:40:25,751 INFO L482 AbstractCegarLoop]: Abstraction has 2419 states and 6889 transitions. [2021-07-13 19:40:25,751 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:25,751 INFO L276 IsEmpty]: Start isEmpty. Operand 2419 states and 6889 transitions. [2021-07-13 19:40:25,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:40:25,753 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:40:25,753 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:40:25,954 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 572 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4329 [2021-07-13 19:40:25,954 INFO L430 AbstractCegarLoop]: === Iteration 582 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:40:25,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:40:25,954 INFO L82 PathProgramCache]: Analyzing trace with hash 1118737846, now seen corresponding path program 568 times [2021-07-13 19:40:25,954 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:40:25,954 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090632056] [2021-07-13 19:40:25,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:40:25,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:40:26,069 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:26,070 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:40:26,070 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090632056] [2021-07-13 19:40:26,070 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1090632056] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:26,070 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [103927272] [2021-07-13 19:40:26,070 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 573 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 573 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:26,097 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:40:26,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:40:26,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 19:40:26,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:40:26,225 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:26,225 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:26,225 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:40:26,226 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:26,228 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:26,228 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:26,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:40:26,229 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:26,232 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:26,232 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:26,232 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:40:26,233 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:26,235 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:26,235 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:40:26,236 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:26,268 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-07-13 19:40:26,268 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:40:26,268 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:40:26,268 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-07-13 19:40:26,322 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:26,322 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [103927272] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:26,322 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:40:26,322 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-07-13 19:40:26,322 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108088407] [2021-07-13 19:40:26,322 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 19:40:26,322 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:40:26,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 19:40:26,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:40:26,322 INFO L87 Difference]: Start difference. First operand 2419 states and 6889 transitions. Second operand has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:26,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:40:26,677 INFO L93 Difference]: Finished difference Result 2769 states and 7714 transitions. [2021-07-13 19:40:26,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 19:40:26,677 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:40:26,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:40:26,681 INFO L225 Difference]: With dead ends: 2769 [2021-07-13 19:40:26,681 INFO L226 Difference]: Without dead ends: 2769 [2021-07-13 19:40:26,681 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 340.4ms TimeCoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:40:26,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2769 states. [2021-07-13 19:40:26,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2769 to 2410. [2021-07-13 19:40:26,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2410 states, 2409 states have (on average 2.8484848484848486) internal successors, (6862), 2409 states have internal predecessors, (6862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:26,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2410 states to 2410 states and 6862 transitions. [2021-07-13 19:40:26,708 INFO L78 Accepts]: Start accepts. Automaton has 2410 states and 6862 transitions. Word has length 19 [2021-07-13 19:40:26,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:40:26,708 INFO L482 AbstractCegarLoop]: Abstraction has 2410 states and 6862 transitions. [2021-07-13 19:40:26,708 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:26,708 INFO L276 IsEmpty]: Start isEmpty. Operand 2410 states and 6862 transitions. [2021-07-13 19:40:26,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:40:26,710 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:40:26,710 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:40:26,911 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4335,573 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:26,911 INFO L430 AbstractCegarLoop]: === Iteration 583 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:40:26,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:40:26,911 INFO L82 PathProgramCache]: Analyzing trace with hash -44673570, now seen corresponding path program 569 times [2021-07-13 19:40:26,911 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:40:26,911 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247645601] [2021-07-13 19:40:26,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:40:26,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:40:27,010 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:27,010 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:40:27,010 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247645601] [2021-07-13 19:40:27,010 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [247645601] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:27,010 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1987821657] [2021-07-13 19:40:27,010 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 574 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 574 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:27,080 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:40:27,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:40:27,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 19:40:27,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:40:27,243 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:27,243 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:27,243 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:40:27,244 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:27,246 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:27,247 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:40:27,247 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:27,269 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-07-13 19:40:27,269 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:40:27,270 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:40:27,270 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-07-13 19:40:27,292 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:27,292 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1987821657] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:27,292 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:40:27,292 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-07-13 19:40:27,292 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314032581] [2021-07-13 19:40:27,292 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 19:40:27,292 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:40:27,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 19:40:27,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=333, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:40:27,293 INFO L87 Difference]: Start difference. First operand 2410 states and 6862 transitions. Second operand has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:27,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:40:27,715 INFO L93 Difference]: Finished difference Result 2776 states and 7745 transitions. [2021-07-13 19:40:27,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 19:40:27,715 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:40:27,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:40:27,719 INFO L225 Difference]: With dead ends: 2776 [2021-07-13 19:40:27,719 INFO L226 Difference]: Without dead ends: 2776 [2021-07-13 19:40:27,719 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 270.4ms TimeCoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:40:27,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2776 states. [2021-07-13 19:40:27,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2776 to 2412. [2021-07-13 19:40:27,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2412 states, 2411 states have (on average 2.848610535047698) internal successors, (6868), 2411 states have internal predecessors, (6868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:27,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2412 states to 2412 states and 6868 transitions. [2021-07-13 19:40:27,754 INFO L78 Accepts]: Start accepts. Automaton has 2412 states and 6868 transitions. Word has length 19 [2021-07-13 19:40:27,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:40:27,754 INFO L482 AbstractCegarLoop]: Abstraction has 2412 states and 6868 transitions. [2021-07-13 19:40:27,754 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:27,754 INFO L276 IsEmpty]: Start isEmpty. Operand 2412 states and 6868 transitions. [2021-07-13 19:40:27,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:40:27,758 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:40:27,758 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:40:27,958 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 574 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4339 [2021-07-13 19:40:27,958 INFO L430 AbstractCegarLoop]: === Iteration 584 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:40:27,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:40:27,959 INFO L82 PathProgramCache]: Analyzing trace with hash 886209018, now seen corresponding path program 570 times [2021-07-13 19:40:27,959 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:40:27,959 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248460700] [2021-07-13 19:40:27,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:40:27,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:40:28,058 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:28,058 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:40:28,058 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248460700] [2021-07-13 19:40:28,058 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [248460700] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:28,058 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2071523012] [2021-07-13 19:40:28,058 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 575 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 575 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:28,086 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:40:28,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:40:28,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 19:40:28,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:40:28,294 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:40:28,295 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:28,297 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:40:28,298 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:28,301 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:28,301 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:28,301 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:40:28,302 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:28,304 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:28,305 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:28,305 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:40:28,305 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:28,308 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:40:28,308 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:28,310 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:40:28,311 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:28,340 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-07-13 19:40:28,341 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:40:28,342 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:40:28,342 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-07-13 19:40:28,374 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:28,374 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2071523012] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:28,374 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:40:28,374 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-07-13 19:40:28,374 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515775675] [2021-07-13 19:40:28,374 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 19:40:28,374 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:40:28,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 19:40:28,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=333, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:40:28,375 INFO L87 Difference]: Start difference. First operand 2412 states and 6868 transitions. Second operand has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:28,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:40:28,853 INFO L93 Difference]: Finished difference Result 2737 states and 7656 transitions. [2021-07-13 19:40:28,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-13 19:40:28,853 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:40:28,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:40:28,856 INFO L225 Difference]: With dead ends: 2737 [2021-07-13 19:40:28,856 INFO L226 Difference]: Without dead ends: 2729 [2021-07-13 19:40:28,857 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 461.9ms TimeCoverageRelationStatistics Valid=104, Invalid=826, Unknown=0, NotChecked=0, Total=930 [2021-07-13 19:40:28,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2729 states. [2021-07-13 19:40:28,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2729 to 2412. [2021-07-13 19:40:28,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2412 states, 2411 states have (on average 2.8473662380754874) internal successors, (6865), 2411 states have internal predecessors, (6865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:28,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2412 states to 2412 states and 6865 transitions. [2021-07-13 19:40:28,883 INFO L78 Accepts]: Start accepts. Automaton has 2412 states and 6865 transitions. Word has length 19 [2021-07-13 19:40:28,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:40:28,883 INFO L482 AbstractCegarLoop]: Abstraction has 2412 states and 6865 transitions. [2021-07-13 19:40:28,883 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:28,883 INFO L276 IsEmpty]: Start isEmpty. Operand 2412 states and 6865 transitions. [2021-07-13 19:40:28,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:40:28,885 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:40:28,886 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:40:29,086 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 575 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4342 [2021-07-13 19:40:29,086 INFO L430 AbstractCegarLoop]: === Iteration 585 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:40:29,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:40:29,086 INFO L82 PathProgramCache]: Analyzing trace with hash 649198238, now seen corresponding path program 571 times [2021-07-13 19:40:29,086 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:40:29,086 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617854584] [2021-07-13 19:40:29,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:40:29,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:40:29,197 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:29,197 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:40:29,197 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617854584] [2021-07-13 19:40:29,197 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [617854584] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:29,197 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [199951288] [2021-07-13 19:40:29,197 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 576 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 576 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:29,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:40:29,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 19:40:29,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:40:29,344 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:29,345 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:29,345 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:40:29,346 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:29,348 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:29,348 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:29,348 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:40:29,349 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:29,351 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:29,352 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:29,353 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:40:29,353 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:29,355 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:29,355 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:40:29,356 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:29,389 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-07-13 19:40:29,389 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:40:29,390 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:40:29,390 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-07-13 19:40:29,472 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:29,473 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [199951288] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:29,473 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:40:29,473 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-07-13 19:40:29,473 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121462856] [2021-07-13 19:40:29,473 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 19:40:29,473 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:40:29,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 19:40:29,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=332, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:40:29,473 INFO L87 Difference]: Start difference. First operand 2412 states and 6865 transitions. Second operand has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:30,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:40:30,537 INFO L93 Difference]: Finished difference Result 2821 states and 7840 transitions. [2021-07-13 19:40:30,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-07-13 19:40:30,537 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:40:30,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:40:30,541 INFO L225 Difference]: With dead ends: 2821 [2021-07-13 19:40:30,541 INFO L226 Difference]: Without dead ends: 2814 [2021-07-13 19:40:30,541 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 406 ImplicationChecksByTransitivity, 847.8ms TimeCoverageRelationStatistics Valid=196, Invalid=1696, Unknown=0, NotChecked=0, Total=1892 [2021-07-13 19:40:30,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2814 states. [2021-07-13 19:40:30,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2814 to 2441. [2021-07-13 19:40:30,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2441 states, 2440 states have (on average 2.8540983606557377) internal successors, (6964), 2440 states have internal predecessors, (6964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:30,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2441 states to 2441 states and 6964 transitions. [2021-07-13 19:40:30,575 INFO L78 Accepts]: Start accepts. Automaton has 2441 states and 6964 transitions. Word has length 19 [2021-07-13 19:40:30,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:40:30,575 INFO L482 AbstractCegarLoop]: Abstraction has 2441 states and 6964 transitions. [2021-07-13 19:40:30,575 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:30,575 INFO L276 IsEmpty]: Start isEmpty. Operand 2441 states and 6964 transitions. [2021-07-13 19:40:30,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:40:30,578 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:40:30,578 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:40:30,778 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 576 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4349 [2021-07-13 19:40:30,778 INFO L430 AbstractCegarLoop]: === Iteration 586 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:40:30,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:40:30,778 INFO L82 PathProgramCache]: Analyzing trace with hash 1995180024, now seen corresponding path program 572 times [2021-07-13 19:40:30,779 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:40:30,779 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231580696] [2021-07-13 19:40:30,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:40:30,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:40:30,888 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:30,888 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:40:30,888 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231580696] [2021-07-13 19:40:30,888 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [231580696] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:30,888 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [388424478] [2021-07-13 19:40:30,888 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 577 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 577 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:30,915 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:40:30,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:40:30,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 19:40:30,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:40:31,067 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:31,068 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:31,068 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:40:31,069 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:31,071 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:31,071 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:40:31,072 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:31,094 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-07-13 19:40:31,094 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:40:31,095 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:40:31,095 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-07-13 19:40:31,116 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:31,117 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [388424478] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:31,117 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:40:31,117 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-07-13 19:40:31,117 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936291680] [2021-07-13 19:40:31,117 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 19:40:31,117 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:40:31,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 19:40:31,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=332, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:40:31,117 INFO L87 Difference]: Start difference. First operand 2441 states and 6964 transitions. Second operand has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:32,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:40:32,209 INFO L93 Difference]: Finished difference Result 3027 states and 8251 transitions. [2021-07-13 19:40:32,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-07-13 19:40:32,210 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:40:32,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:40:32,213 INFO L225 Difference]: With dead ends: 3027 [2021-07-13 19:40:32,213 INFO L226 Difference]: Without dead ends: 3027 [2021-07-13 19:40:32,214 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 603 ImplicationChecksByTransitivity, 728.5ms TimeCoverageRelationStatistics Valid=234, Invalid=2216, Unknown=0, NotChecked=0, Total=2450 [2021-07-13 19:40:32,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3027 states. [2021-07-13 19:40:32,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3027 to 2459. [2021-07-13 19:40:32,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2459 states, 2458 states have (on average 2.856387306753458) internal successors, (7021), 2458 states have internal predecessors, (7021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:32,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2459 states to 2459 states and 7021 transitions. [2021-07-13 19:40:32,243 INFO L78 Accepts]: Start accepts. Automaton has 2459 states and 7021 transitions. Word has length 19 [2021-07-13 19:40:32,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:40:32,243 INFO L482 AbstractCegarLoop]: Abstraction has 2459 states and 7021 transitions. [2021-07-13 19:40:32,243 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:32,243 INFO L276 IsEmpty]: Start isEmpty. Operand 2459 states and 7021 transitions. [2021-07-13 19:40:32,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:40:32,246 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:40:32,246 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:40:32,446 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 577 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4354 [2021-07-13 19:40:32,446 INFO L430 AbstractCegarLoop]: === Iteration 587 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:40:32,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:40:32,447 INFO L82 PathProgramCache]: Analyzing trace with hash -745738148, now seen corresponding path program 573 times [2021-07-13 19:40:32,447 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:40:32,447 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697801804] [2021-07-13 19:40:32,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:40:32,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:40:32,545 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:32,545 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:40:32,545 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697801804] [2021-07-13 19:40:32,545 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [697801804] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:32,545 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [183860378] [2021-07-13 19:40:32,545 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 578 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 578 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:32,574 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 19:40:32,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:40:32,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 19:40:32,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:40:32,739 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:40:32,740 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:32,742 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:40:32,743 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:32,745 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:32,745 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:32,746 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:40:32,746 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:32,749 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:32,749 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:32,749 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:40:32,750 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:32,752 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:40:32,753 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:32,755 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:40:32,756 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:32,785 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-07-13 19:40:32,786 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:40:32,786 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:40:32,787 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-07-13 19:40:32,816 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:32,816 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [183860378] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:32,817 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:40:32,817 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-07-13 19:40:32,817 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504405191] [2021-07-13 19:40:32,817 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 19:40:32,817 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:40:32,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 19:40:32,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=332, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:40:32,817 INFO L87 Difference]: Start difference. First operand 2459 states and 7021 transitions. Second operand has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:33,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:40:33,613 INFO L93 Difference]: Finished difference Result 2838 states and 7882 transitions. [2021-07-13 19:40:33,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-13 19:40:33,613 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:40:33,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:40:33,617 INFO L225 Difference]: With dead ends: 2838 [2021-07-13 19:40:33,618 INFO L226 Difference]: Without dead ends: 2832 [2021-07-13 19:40:33,618 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 318 ImplicationChecksByTransitivity, 626.3ms TimeCoverageRelationStatistics Valid=156, Invalid=1404, Unknown=0, NotChecked=0, Total=1560 [2021-07-13 19:40:33,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2832 states. [2021-07-13 19:40:33,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2832 to 2460. [2021-07-13 19:40:33,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2460 states, 2459 states have (on average 2.854005693371289) internal successors, (7018), 2459 states have internal predecessors, (7018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:33,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2460 states to 2460 states and 7018 transitions. [2021-07-13 19:40:33,647 INFO L78 Accepts]: Start accepts. Automaton has 2460 states and 7018 transitions. Word has length 19 [2021-07-13 19:40:33,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:40:33,647 INFO L482 AbstractCegarLoop]: Abstraction has 2460 states and 7018 transitions. [2021-07-13 19:40:33,648 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:33,648 INFO L276 IsEmpty]: Start isEmpty. Operand 2460 states and 7018 transitions. [2021-07-13 19:40:33,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:40:33,650 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:40:33,650 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:40:33,851 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4357,578 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:33,851 INFO L430 AbstractCegarLoop]: === Iteration 588 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:40:33,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:40:33,851 INFO L82 PathProgramCache]: Analyzing trace with hash -444893350, now seen corresponding path program 574 times [2021-07-13 19:40:33,851 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:40:33,851 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135893408] [2021-07-13 19:40:33,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:40:33,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:40:33,953 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:33,953 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:40:33,953 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135893408] [2021-07-13 19:40:33,953 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2135893408] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:33,953 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1740340317] [2021-07-13 19:40:33,953 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 579 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 579 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:33,980 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:40:33,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:40:33,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 19:40:33,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:40:34,100 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:34,101 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:34,101 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:40:34,102 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:34,104 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:34,104 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:34,104 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:40:34,105 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:34,107 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:34,107 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:34,108 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:40:34,108 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:34,110 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:34,110 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:40:34,111 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:34,145 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-07-13 19:40:34,146 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:40:34,146 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:40:34,146 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-07-13 19:40:34,219 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:34,220 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1740340317] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:34,220 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:40:34,220 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-07-13 19:40:34,220 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704058915] [2021-07-13 19:40:34,220 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 19:40:34,220 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:40:34,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 19:40:34,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:40:34,220 INFO L87 Difference]: Start difference. First operand 2460 states and 7018 transitions. Second operand has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:35,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:40:35,294 INFO L93 Difference]: Finished difference Result 2982 states and 8286 transitions. [2021-07-13 19:40:35,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-07-13 19:40:35,294 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:40:35,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:40:35,298 INFO L225 Difference]: With dead ends: 2982 [2021-07-13 19:40:35,298 INFO L226 Difference]: Without dead ends: 2976 [2021-07-13 19:40:35,298 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 531 ImplicationChecksByTransitivity, 856.7ms TimeCoverageRelationStatistics Valid=223, Invalid=2033, Unknown=0, NotChecked=0, Total=2256 [2021-07-13 19:40:35,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2976 states. [2021-07-13 19:40:35,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2976 to 2507. [2021-07-13 19:40:35,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2507 states, 2506 states have (on average 2.8591380686352754) internal successors, (7165), 2506 states have internal predecessors, (7165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:35,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2507 states to 2507 states and 7165 transitions. [2021-07-13 19:40:35,327 INFO L78 Accepts]: Start accepts. Automaton has 2507 states and 7165 transitions. Word has length 19 [2021-07-13 19:40:35,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:40:35,327 INFO L482 AbstractCegarLoop]: Abstraction has 2507 states and 7165 transitions. [2021-07-13 19:40:35,327 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:35,327 INFO L276 IsEmpty]: Start isEmpty. Operand 2507 states and 7165 transitions. [2021-07-13 19:40:35,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:40:35,329 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:40:35,329 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:40:35,530 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 579 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4364 [2021-07-13 19:40:35,530 INFO L430 AbstractCegarLoop]: === Iteration 589 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:40:35,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:40:35,530 INFO L82 PathProgramCache]: Analyzing trace with hash -987059554, now seen corresponding path program 575 times [2021-07-13 19:40:35,530 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:40:35,530 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980411076] [2021-07-13 19:40:35,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:40:35,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:40:35,634 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:35,634 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:40:35,634 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980411076] [2021-07-13 19:40:35,634 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [980411076] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:35,634 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1417975742] [2021-07-13 19:40:35,635 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 580 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 580 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:35,663 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-13 19:40:35,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:40:35,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 19:40:35,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:40:35,795 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:35,796 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:35,796 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:40:35,797 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:35,799 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:35,799 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:40:35,800 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:35,821 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-07-13 19:40:35,822 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:40:35,822 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:40:35,822 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-07-13 19:40:35,843 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:35,843 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1417975742] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:35,843 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:40:35,843 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-07-13 19:40:35,843 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246053111] [2021-07-13 19:40:35,843 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 19:40:35,844 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:40:35,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 19:40:35,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:40:35,844 INFO L87 Difference]: Start difference. First operand 2507 states and 7165 transitions. Second operand has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:36,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:40:36,693 INFO L93 Difference]: Finished difference Result 3168 states and 8669 transitions. [2021-07-13 19:40:36,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-07-13 19:40:36,693 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:40:36,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:40:36,697 INFO L225 Difference]: With dead ends: 3168 [2021-07-13 19:40:36,697 INFO L226 Difference]: Without dead ends: 3168 [2021-07-13 19:40:36,697 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 494 ImplicationChecksByTransitivity, 530.0ms TimeCoverageRelationStatistics Valid=191, Invalid=1879, Unknown=0, NotChecked=0, Total=2070 [2021-07-13 19:40:36,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3168 states. [2021-07-13 19:40:36,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3168 to 2563. [2021-07-13 19:40:36,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2563 states, 2562 states have (on average 2.869242779078845) internal successors, (7351), 2562 states have internal predecessors, (7351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:36,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2563 states to 2563 states and 7351 transitions. [2021-07-13 19:40:36,726 INFO L78 Accepts]: Start accepts. Automaton has 2563 states and 7351 transitions. Word has length 19 [2021-07-13 19:40:36,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:40:36,726 INFO L482 AbstractCegarLoop]: Abstraction has 2563 states and 7351 transitions. [2021-07-13 19:40:36,726 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:36,726 INFO L276 IsEmpty]: Start isEmpty. Operand 2563 states and 7351 transitions. [2021-07-13 19:40:36,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:40:36,729 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:40:36,729 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:40:36,929 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4369,580 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:36,929 INFO L430 AbstractCegarLoop]: === Iteration 590 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:40:36,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:40:36,930 INFO L82 PathProgramCache]: Analyzing trace with hash -1906760262, now seen corresponding path program 576 times [2021-07-13 19:40:36,930 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:40:36,930 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302906578] [2021-07-13 19:40:36,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:40:36,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:40:37,030 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:37,030 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:40:37,030 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302906578] [2021-07-13 19:40:37,030 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1302906578] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:37,030 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [659036836] [2021-07-13 19:40:37,030 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 581 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 581 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:37,061 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:40:37,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:40:37,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 19:40:37,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:40:37,218 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:40:37,220 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:37,223 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:40:37,223 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:37,226 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:37,226 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:37,226 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:40:37,227 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:37,229 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:37,230 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:37,230 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:40:37,231 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:37,233 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:40:37,234 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:37,236 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:40:37,237 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:37,266 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-07-13 19:40:37,266 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:40:37,267 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:40:37,267 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-07-13 19:40:37,299 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:37,299 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [659036836] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:37,299 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:40:37,299 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-07-13 19:40:37,299 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981034423] [2021-07-13 19:40:37,299 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 19:40:37,299 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:40:37,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 19:40:37,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:40:37,300 INFO L87 Difference]: Start difference. First operand 2563 states and 7351 transitions. Second operand has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:38,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:40:38,189 INFO L93 Difference]: Finished difference Result 2969 states and 8260 transitions. [2021-07-13 19:40:38,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-07-13 19:40:38,190 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:40:38,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:40:38,193 INFO L225 Difference]: With dead ends: 2969 [2021-07-13 19:40:38,193 INFO L226 Difference]: Without dead ends: 2965 [2021-07-13 19:40:38,194 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 406 ImplicationChecksByTransitivity, 646.7ms TimeCoverageRelationStatistics Valid=169, Invalid=1637, Unknown=0, NotChecked=0, Total=1806 [2021-07-13 19:40:38,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2965 states. [2021-07-13 19:40:38,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2965 to 2564. [2021-07-13 19:40:38,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2564 states, 2563 states have (on average 2.865001950838861) internal successors, (7343), 2563 states have internal predecessors, (7343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:38,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2564 states to 2564 states and 7343 transitions. [2021-07-13 19:40:38,222 INFO L78 Accepts]: Start accepts. Automaton has 2564 states and 7343 transitions. Word has length 19 [2021-07-13 19:40:38,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:40:38,222 INFO L482 AbstractCegarLoop]: Abstraction has 2564 states and 7343 transitions. [2021-07-13 19:40:38,222 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:38,222 INFO L276 IsEmpty]: Start isEmpty. Operand 2564 states and 7343 transitions. [2021-07-13 19:40:38,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:40:38,225 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:40:38,225 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:40:38,425 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4372,581 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:38,425 INFO L430 AbstractCegarLoop]: === Iteration 591 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:40:38,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:40:38,425 INFO L82 PathProgramCache]: Analyzing trace with hash 628192030, now seen corresponding path program 577 times [2021-07-13 19:40:38,426 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:40:38,426 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176657540] [2021-07-13 19:40:38,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:40:38,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:40:38,527 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:38,527 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:40:38,527 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176657540] [2021-07-13 19:40:38,528 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1176657540] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:38,528 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [787773831] [2021-07-13 19:40:38,528 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 582 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 582 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:38,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:40:38,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 19:40:38,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:40:38,661 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:38,661 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:38,661 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:40:38,662 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:38,664 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:38,665 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:38,665 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:40:38,665 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:38,667 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:38,668 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:38,668 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:40:38,669 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:38,671 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:38,671 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:40:38,672 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:38,705 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-07-13 19:40:38,705 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:40:38,705 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:40:38,705 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-07-13 19:40:38,780 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:38,781 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [787773831] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:38,781 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:40:38,781 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-07-13 19:40:38,781 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534128118] [2021-07-13 19:40:38,781 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 19:40:38,781 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:40:38,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 19:40:38,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=330, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:40:38,781 INFO L87 Difference]: Start difference. First operand 2564 states and 7343 transitions. Second operand has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:40,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:40:40,055 INFO L93 Difference]: Finished difference Result 3112 states and 8553 transitions. [2021-07-13 19:40:40,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-07-13 19:40:40,055 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:40:40,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:40:40,059 INFO L225 Difference]: With dead ends: 3112 [2021-07-13 19:40:40,059 INFO L226 Difference]: Without dead ends: 3107 [2021-07-13 19:40:40,060 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 763 ImplicationChecksByTransitivity, 948.0ms TimeCoverageRelationStatistics Valid=269, Invalid=2593, Unknown=0, NotChecked=0, Total=2862 [2021-07-13 19:40:40,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3107 states. [2021-07-13 19:40:40,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3107 to 2573. [2021-07-13 19:40:40,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2573 states, 2572 states have (on average 2.8635303265940903) internal successors, (7365), 2572 states have internal predecessors, (7365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:40,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2573 states to 2573 states and 7365 transitions. [2021-07-13 19:40:40,090 INFO L78 Accepts]: Start accepts. Automaton has 2573 states and 7365 transitions. Word has length 19 [2021-07-13 19:40:40,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:40:40,090 INFO L482 AbstractCegarLoop]: Abstraction has 2573 states and 7365 transitions. [2021-07-13 19:40:40,090 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:40,090 INFO L276 IsEmpty]: Start isEmpty. Operand 2573 states and 7365 transitions. [2021-07-13 19:40:40,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:40:40,093 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:40:40,093 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:40:40,295 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4379,582 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:40,295 INFO L430 AbstractCegarLoop]: === Iteration 592 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:40:40,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:40:40,295 INFO L82 PathProgramCache]: Analyzing trace with hash 1826233144, now seen corresponding path program 578 times [2021-07-13 19:40:40,296 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:40:40,296 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155762699] [2021-07-13 19:40:40,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:40:40,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:40:40,417 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:40,417 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:40:40,417 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155762699] [2021-07-13 19:40:40,417 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1155762699] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:40,417 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [978560802] [2021-07-13 19:40:40,417 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 583 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 583 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:40,445 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:40:40,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:40:40,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 19:40:40,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:40:40,547 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:40,547 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:40,548 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:40:40,548 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:40,550 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:40,551 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:40,551 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:40:40,552 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:40,554 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:40,554 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:40,554 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:40:40,555 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:40,557 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:40,557 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:40:40,558 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:40,590 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-07-13 19:40:40,590 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:40:40,591 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:40:40,591 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-07-13 19:40:40,644 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:40,644 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [978560802] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:40,644 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:40:40,644 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-07-13 19:40:40,644 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627582517] [2021-07-13 19:40:40,644 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 19:40:40,644 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:40:40,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 19:40:40,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=330, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:40:40,644 INFO L87 Difference]: Start difference. First operand 2573 states and 7365 transitions. Second operand has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:41,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:40:41,714 INFO L93 Difference]: Finished difference Result 3156 states and 8624 transitions. [2021-07-13 19:40:41,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-07-13 19:40:41,715 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:40:41,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:40:41,719 INFO L225 Difference]: With dead ends: 3156 [2021-07-13 19:40:41,719 INFO L226 Difference]: Without dead ends: 3156 [2021-07-13 19:40:41,719 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 553 ImplicationChecksByTransitivity, 725.2ms TimeCoverageRelationStatistics Valid=232, Invalid=2024, Unknown=0, NotChecked=0, Total=2256 [2021-07-13 19:40:41,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3156 states. [2021-07-13 19:40:41,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3156 to 2594. [2021-07-13 19:40:41,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2594 states, 2593 states have (on average 2.866949479367528) internal successors, (7434), 2593 states have internal predecessors, (7434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:41,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2594 states to 2594 states and 7434 transitions. [2021-07-13 19:40:41,751 INFO L78 Accepts]: Start accepts. Automaton has 2594 states and 7434 transitions. Word has length 19 [2021-07-13 19:40:41,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:40:41,751 INFO L482 AbstractCegarLoop]: Abstraction has 2594 states and 7434 transitions. [2021-07-13 19:40:41,751 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:41,751 INFO L276 IsEmpty]: Start isEmpty. Operand 2594 states and 7434 transitions. [2021-07-13 19:40:41,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:40:41,754 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:40:41,754 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:40:41,954 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 583 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4384 [2021-07-13 19:40:41,954 INFO L430 AbstractCegarLoop]: === Iteration 593 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:40:41,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:40:41,955 INFO L82 PathProgramCache]: Analyzing trace with hash -1667117924, now seen corresponding path program 579 times [2021-07-13 19:40:41,955 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:40:41,955 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102563816] [2021-07-13 19:40:41,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:40:41,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:40:42,062 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:42,063 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:40:42,063 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102563816] [2021-07-13 19:40:42,063 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [102563816] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:42,063 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1618939665] [2021-07-13 19:40:42,063 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 584 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 584 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:42,091 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-13 19:40:42,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:40:42,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 19:40:42,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:40:42,194 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:42,195 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:42,195 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:40:42,196 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:42,198 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:42,198 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:42,198 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:40:42,199 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:42,201 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:42,201 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:42,202 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:40:42,202 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:42,204 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:42,204 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:40:42,205 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:42,238 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-07-13 19:40:42,238 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:40:42,239 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:40:42,239 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-07-13 19:40:42,306 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:42,306 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1618939665] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:42,306 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:40:42,306 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-07-13 19:40:42,306 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874070418] [2021-07-13 19:40:42,306 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 19:40:42,306 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:40:42,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 19:40:42,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=330, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:40:42,306 INFO L87 Difference]: Start difference. First operand 2594 states and 7434 transitions. Second operand has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:43,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:40:43,544 INFO L93 Difference]: Finished difference Result 3128 states and 8611 transitions. [2021-07-13 19:40:43,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-07-13 19:40:43,544 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:40:43,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:40:43,548 INFO L225 Difference]: With dead ends: 3128 [2021-07-13 19:40:43,548 INFO L226 Difference]: Without dead ends: 3120 [2021-07-13 19:40:43,549 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1081 ImplicationChecksByTransitivity, 948.6ms TimeCoverageRelationStatistics Valid=293, Invalid=3367, Unknown=0, NotChecked=0, Total=3660 [2021-07-13 19:40:43,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3120 states. [2021-07-13 19:40:43,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3120 to 2635. [2021-07-13 19:40:43,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2635 states, 2634 states have (on average 2.8549734244495064) internal successors, (7520), 2634 states have internal predecessors, (7520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:43,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2635 states to 2635 states and 7520 transitions. [2021-07-13 19:40:43,579 INFO L78 Accepts]: Start accepts. Automaton has 2635 states and 7520 transitions. Word has length 19 [2021-07-13 19:40:43,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:40:43,579 INFO L482 AbstractCegarLoop]: Abstraction has 2635 states and 7520 transitions. [2021-07-13 19:40:43,579 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:43,579 INFO L276 IsEmpty]: Start isEmpty. Operand 2635 states and 7520 transitions. [2021-07-13 19:40:43,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:40:43,581 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:40:43,582 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:40:43,782 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4388,584 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:43,782 INFO L430 AbstractCegarLoop]: === Iteration 594 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:40:43,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:40:43,782 INFO L82 PathProgramCache]: Analyzing trace with hash 51225782, now seen corresponding path program 580 times [2021-07-13 19:40:43,782 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:40:43,782 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758361375] [2021-07-13 19:40:43,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:40:43,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:40:43,903 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:43,904 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:40:43,904 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758361375] [2021-07-13 19:40:43,904 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [758361375] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:43,904 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1359120383] [2021-07-13 19:40:43,904 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 585 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 585 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:43,932 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:40:43,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:40:43,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 19:40:43,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:40:44,035 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:44,036 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:44,036 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:40:44,037 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:44,039 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:44,039 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:44,039 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:40:44,040 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:44,042 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:44,043 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:44,043 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:40:44,043 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:44,045 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:44,046 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:40:44,046 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:44,079 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-07-13 19:40:44,080 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:40:44,080 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:40:44,080 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-07-13 19:40:44,133 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:44,133 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1359120383] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:44,133 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:40:44,133 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-07-13 19:40:44,133 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154842397] [2021-07-13 19:40:44,133 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 19:40:44,133 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:40:44,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 19:40:44,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=330, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:40:44,133 INFO L87 Difference]: Start difference. First operand 2635 states and 7520 transitions. Second operand has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:45,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:40:45,059 INFO L93 Difference]: Finished difference Result 3125 states and 8616 transitions. [2021-07-13 19:40:45,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-07-13 19:40:45,059 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:40:45,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:40:45,063 INFO L225 Difference]: With dead ends: 3125 [2021-07-13 19:40:45,063 INFO L226 Difference]: Without dead ends: 3125 [2021-07-13 19:40:45,063 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 415 ImplicationChecksByTransitivity, 640.1ms TimeCoverageRelationStatistics Valid=185, Invalid=1621, Unknown=0, NotChecked=0, Total=1806 [2021-07-13 19:40:45,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3125 states. [2021-07-13 19:40:45,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3125 to 2631. [2021-07-13 19:40:45,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2631 states, 2630 states have (on average 2.853231939163498) internal successors, (7504), 2630 states have internal predecessors, (7504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:45,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2631 states to 2631 states and 7504 transitions. [2021-07-13 19:40:45,094 INFO L78 Accepts]: Start accepts. Automaton has 2631 states and 7504 transitions. Word has length 19 [2021-07-13 19:40:45,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:40:45,094 INFO L482 AbstractCegarLoop]: Abstraction has 2631 states and 7504 transitions. [2021-07-13 19:40:45,094 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:45,094 INFO L276 IsEmpty]: Start isEmpty. Operand 2631 states and 7504 transitions. [2021-07-13 19:40:45,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:40:45,097 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:40:45,097 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:40:45,298 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 585 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4394 [2021-07-13 19:40:45,298 INFO L430 AbstractCegarLoop]: === Iteration 595 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:40:45,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:40:45,298 INFO L82 PathProgramCache]: Analyzing trace with hash -1659387526, now seen corresponding path program 581 times [2021-07-13 19:40:45,298 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:40:45,298 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38689363] [2021-07-13 19:40:45,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:40:45,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:40:45,400 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:45,400 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:40:45,400 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38689363] [2021-07-13 19:40:45,401 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [38689363] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:45,401 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [481207498] [2021-07-13 19:40:45,401 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 586 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 586 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:45,430 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-13 19:40:45,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:40:45,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 19:40:45,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:40:45,547 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:45,548 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:45,548 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:40:45,549 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:45,551 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:45,551 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:40:45,552 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:45,569 INFO L628 ElimStorePlain]: treesize reduction 30, result has 33.3 percent of original size [2021-07-13 19:40:45,569 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:40:45,569 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:40:45,569 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:59, output treesize:15 [2021-07-13 19:40:45,594 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:45,594 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [481207498] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:45,594 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:40:45,594 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-07-13 19:40:45,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239288568] [2021-07-13 19:40:45,594 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 19:40:45,594 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:40:45,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 19:40:45,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=330, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:40:45,594 INFO L87 Difference]: Start difference. First operand 2631 states and 7504 transitions. Second operand has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:46,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:40:46,262 INFO L93 Difference]: Finished difference Result 3189 states and 8778 transitions. [2021-07-13 19:40:46,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-13 19:40:46,262 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:40:46,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:40:46,266 INFO L225 Difference]: With dead ends: 3189 [2021-07-13 19:40:46,267 INFO L226 Difference]: Without dead ends: 3189 [2021-07-13 19:40:46,267 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 359.9ms TimeCoverageRelationStatistics Valid=110, Invalid=1080, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 19:40:46,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3189 states. [2021-07-13 19:40:46,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3189 to 2576. [2021-07-13 19:40:46,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2576 states, 2575 states have (on average 2.84) internal successors, (7313), 2575 states have internal predecessors, (7313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:46,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2576 states to 2576 states and 7313 transitions. [2021-07-13 19:40:46,298 INFO L78 Accepts]: Start accepts. Automaton has 2576 states and 7313 transitions. Word has length 19 [2021-07-13 19:40:46,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:40:46,298 INFO L482 AbstractCegarLoop]: Abstraction has 2576 states and 7313 transitions. [2021-07-13 19:40:46,298 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:46,298 INFO L276 IsEmpty]: Start isEmpty. Operand 2576 states and 7313 transitions. [2021-07-13 19:40:46,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:40:46,301 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:40:46,301 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:40:46,501 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 586 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4398 [2021-07-13 19:40:46,501 INFO L430 AbstractCegarLoop]: === Iteration 596 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:40:46,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:40:46,502 INFO L82 PathProgramCache]: Analyzing trace with hash 1992996928, now seen corresponding path program 582 times [2021-07-13 19:40:46,502 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:40:46,502 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149481098] [2021-07-13 19:40:46,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:40:46,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:40:46,604 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:46,604 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:40:46,604 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149481098] [2021-07-13 19:40:46,604 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1149481098] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:46,604 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1130353978] [2021-07-13 19:40:46,604 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 587 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 587 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:46,632 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:40:46,632 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:40:46,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 19:40:46,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:40:46,805 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:46,805 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:46,806 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:40:46,806 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:46,808 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:46,809 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:40:46,809 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:46,831 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-07-13 19:40:46,831 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:40:46,831 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:40:46,831 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-07-13 19:40:46,853 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:46,854 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1130353978] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:46,854 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:40:46,854 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-07-13 19:40:46,854 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827423] [2021-07-13 19:40:46,854 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:40:46,854 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:40:46,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:40:46,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=372, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:40:46,854 INFO L87 Difference]: Start difference. First operand 2576 states and 7313 transitions. Second operand has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:47,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:40:47,211 INFO L93 Difference]: Finished difference Result 2791 states and 7767 transitions. [2021-07-13 19:40:47,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 19:40:47,211 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:40:47,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:40:47,215 INFO L225 Difference]: With dead ends: 2791 [2021-07-13 19:40:47,215 INFO L226 Difference]: Without dead ends: 2791 [2021-07-13 19:40:47,215 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 234.5ms TimeCoverageRelationStatistics Valid=48, Invalid=372, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:40:47,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2791 states. [2021-07-13 19:40:47,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2791 to 2603. [2021-07-13 19:40:47,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2603 states, 2602 states have (on average 2.840891621829362) internal successors, (7392), 2602 states have internal predecessors, (7392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:47,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2603 states to 2603 states and 7392 transitions. [2021-07-13 19:40:47,254 INFO L78 Accepts]: Start accepts. Automaton has 2603 states and 7392 transitions. Word has length 19 [2021-07-13 19:40:47,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:40:47,254 INFO L482 AbstractCegarLoop]: Abstraction has 2603 states and 7392 transitions. [2021-07-13 19:40:47,254 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:47,254 INFO L276 IsEmpty]: Start isEmpty. Operand 2603 states and 7392 transitions. [2021-07-13 19:40:47,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:40:47,257 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:40:47,257 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:40:47,457 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4400,587 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:47,457 INFO L430 AbstractCegarLoop]: === Iteration 597 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:40:47,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:40:47,458 INFO L82 PathProgramCache]: Analyzing trace with hash 785586084, now seen corresponding path program 583 times [2021-07-13 19:40:47,458 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:40:47,458 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802131843] [2021-07-13 19:40:47,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:40:47,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:40:47,560 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:47,560 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:40:47,560 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802131843] [2021-07-13 19:40:47,560 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [802131843] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:47,560 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [209974892] [2021-07-13 19:40:47,560 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 588 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 588 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:47,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:40:47,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 19:40:47,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:40:47,792 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:40:47,793 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:47,795 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:40:47,796 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:47,798 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:47,799 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:47,799 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:40:47,800 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:47,802 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:47,803 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:47,803 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:40:47,803 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:47,806 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:40:47,806 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:47,808 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:40:47,809 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:47,838 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-07-13 19:40:47,839 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:40:47,839 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:40:47,839 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-07-13 19:40:47,868 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:47,869 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [209974892] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:47,869 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:40:47,869 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-07-13 19:40:47,869 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543683155] [2021-07-13 19:40:47,869 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:40:47,869 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:40:47,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:40:47,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=372, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:40:47,869 INFO L87 Difference]: Start difference. First operand 2603 states and 7392 transitions. Second operand has 21 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:48,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:40:48,465 INFO L93 Difference]: Finished difference Result 2767 states and 7702 transitions. [2021-07-13 19:40:48,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-13 19:40:48,466 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:40:48,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:40:48,469 INFO L225 Difference]: With dead ends: 2767 [2021-07-13 19:40:48,470 INFO L226 Difference]: Without dead ends: 2757 [2021-07-13 19:40:48,470 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 544.6ms TimeCoverageRelationStatistics Valid=112, Invalid=1078, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 19:40:48,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2757 states. [2021-07-13 19:40:48,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2757 to 2610. [2021-07-13 19:40:48,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2610 states, 2609 states have (on average 2.8359524722115754) internal successors, (7399), 2609 states have internal predecessors, (7399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:48,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2610 states to 2610 states and 7399 transitions. [2021-07-13 19:40:48,507 INFO L78 Accepts]: Start accepts. Automaton has 2610 states and 7399 transitions. Word has length 19 [2021-07-13 19:40:48,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:40:48,507 INFO L482 AbstractCegarLoop]: Abstraction has 2610 states and 7399 transitions. [2021-07-13 19:40:48,507 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:48,507 INFO L276 IsEmpty]: Start isEmpty. Operand 2610 states and 7399 transitions. [2021-07-13 19:40:48,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:40:48,510 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:40:48,510 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:40:48,720 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4403,588 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:48,721 INFO L430 AbstractCegarLoop]: === Iteration 598 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:40:48,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:40:48,721 INFO L82 PathProgramCache]: Analyzing trace with hash 361049762, now seen corresponding path program 584 times [2021-07-13 19:40:48,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:40:48,721 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035040320] [2021-07-13 19:40:48,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:40:48,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:40:48,827 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:48,827 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:40:48,827 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035040320] [2021-07-13 19:40:48,827 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2035040320] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:48,827 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [981126306] [2021-07-13 19:40:48,827 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 589 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 589 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:48,854 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:40:48,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:40:48,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 19:40:48,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:40:49,026 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:49,027 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:49,027 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:40:49,028 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:49,030 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:49,030 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:40:49,031 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:49,052 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-07-13 19:40:49,052 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:40:49,053 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:40:49,053 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-07-13 19:40:49,075 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:49,075 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [981126306] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:49,075 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:40:49,075 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-07-13 19:40:49,075 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501661654] [2021-07-13 19:40:49,075 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:40:49,075 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:40:49,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:40:49,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=371, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:40:49,076 INFO L87 Difference]: Start difference. First operand 2610 states and 7399 transitions. Second operand has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:50,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:40:50,902 INFO L93 Difference]: Finished difference Result 2925 states and 8013 transitions. [2021-07-13 19:40:50,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-07-13 19:40:50,903 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:40:50,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:40:50,915 INFO L225 Difference]: With dead ends: 2925 [2021-07-13 19:40:50,915 INFO L226 Difference]: Without dead ends: 2925 [2021-07-13 19:40:50,915 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1182 ImplicationChecksByTransitivity, 1534.9ms TimeCoverageRelationStatistics Valid=484, Invalid=3806, Unknown=0, NotChecked=0, Total=4290 [2021-07-13 19:40:50,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2925 states. [2021-07-13 19:40:50,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2925 to 2615. [2021-07-13 19:40:50,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2615 states, 2614 states have (on average 2.8389441469013006) internal successors, (7421), 2614 states have internal predecessors, (7421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:50,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2615 states to 2615 states and 7421 transitions. [2021-07-13 19:40:50,945 INFO L78 Accepts]: Start accepts. Automaton has 2615 states and 7421 transitions. Word has length 19 [2021-07-13 19:40:50,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:40:50,945 INFO L482 AbstractCegarLoop]: Abstraction has 2615 states and 7421 transitions. [2021-07-13 19:40:50,945 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:50,946 INFO L276 IsEmpty]: Start isEmpty. Operand 2615 states and 7421 transitions. [2021-07-13 19:40:50,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:40:50,948 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:40:50,948 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:40:51,148 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4410,589 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:51,149 INFO L430 AbstractCegarLoop]: === Iteration 599 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:40:51,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:40:51,149 INFO L82 PathProgramCache]: Analyzing trace with hash 1291932350, now seen corresponding path program 585 times [2021-07-13 19:40:51,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:40:51,149 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020531052] [2021-07-13 19:40:51,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:40:51,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:40:51,289 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:51,289 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:40:51,289 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020531052] [2021-07-13 19:40:51,289 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2020531052] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:51,290 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2139031855] [2021-07-13 19:40:51,290 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 590 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 590 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:51,318 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:40:51,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:40:51,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 19:40:51,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:40:51,521 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:40:51,522 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:51,524 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:40:51,525 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:51,527 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:51,528 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:51,528 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:40:51,529 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:51,531 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:51,531 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:51,532 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:40:51,532 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:51,534 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:40:51,535 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:51,537 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:40:51,538 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:51,568 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-07-13 19:40:51,568 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:40:51,569 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:40:51,569 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-07-13 19:40:51,598 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:51,599 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2139031855] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:51,599 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:40:51,599 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-07-13 19:40:51,599 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015567243] [2021-07-13 19:40:51,599 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:40:51,599 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:40:51,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:40:51,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=371, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:40:51,599 INFO L87 Difference]: Start difference. First operand 2615 states and 7421 transitions. Second operand has 21 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:52,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:40:52,349 INFO L93 Difference]: Finished difference Result 2788 states and 7743 transitions. [2021-07-13 19:40:52,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-13 19:40:52,349 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:40:52,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:40:52,352 INFO L225 Difference]: With dead ends: 2788 [2021-07-13 19:40:52,352 INFO L226 Difference]: Without dead ends: 2780 [2021-07-13 19:40:52,353 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 689.5ms TimeCoverageRelationStatistics Valid=157, Invalid=1403, Unknown=0, NotChecked=0, Total=1560 [2021-07-13 19:40:52,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2780 states. [2021-07-13 19:40:52,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2780 to 2619. [2021-07-13 19:40:52,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2619 states, 2618 states have (on average 2.8365164247517187) internal successors, (7426), 2618 states have internal predecessors, (7426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:52,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2619 states to 2619 states and 7426 transitions. [2021-07-13 19:40:52,381 INFO L78 Accepts]: Start accepts. Automaton has 2619 states and 7426 transitions. Word has length 19 [2021-07-13 19:40:52,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:40:52,381 INFO L482 AbstractCegarLoop]: Abstraction has 2619 states and 7426 transitions. [2021-07-13 19:40:52,381 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:52,381 INFO L276 IsEmpty]: Start isEmpty. Operand 2619 states and 7426 transitions. [2021-07-13 19:40:52,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:40:52,384 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:40:52,384 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:40:52,584 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 590 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4413 [2021-07-13 19:40:52,584 INFO L430 AbstractCegarLoop]: === Iteration 600 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:40:52,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:40:52,585 INFO L82 PathProgramCache]: Analyzing trace with hash -799972352, now seen corresponding path program 586 times [2021-07-13 19:40:52,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:40:52,585 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592556480] [2021-07-13 19:40:52,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:40:52,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:40:52,688 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:52,688 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:40:52,688 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592556480] [2021-07-13 19:40:52,688 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1592556480] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:52,688 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1530466964] [2021-07-13 19:40:52,688 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 591 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 591 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:52,716 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:40:52,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:40:52,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 19:40:52,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:40:52,892 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:52,893 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:52,893 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:40:52,894 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:52,896 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:52,896 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:40:52,897 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:52,919 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-07-13 19:40:52,919 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:40:52,920 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:40:52,920 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-07-13 19:40:52,942 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:52,942 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1530466964] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:52,942 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:40:52,942 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-07-13 19:40:52,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122560923] [2021-07-13 19:40:52,942 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:40:52,942 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:40:52,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:40:52,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=370, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:40:52,943 INFO L87 Difference]: Start difference. First operand 2619 states and 7426 transitions. Second operand has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:54,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:40:54,911 INFO L93 Difference]: Finished difference Result 2993 states and 8145 transitions. [2021-07-13 19:40:54,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-07-13 19:40:54,911 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:40:54,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:40:54,915 INFO L225 Difference]: With dead ends: 2993 [2021-07-13 19:40:54,916 INFO L226 Difference]: Without dead ends: 2993 [2021-07-13 19:40:54,916 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1121 ImplicationChecksByTransitivity, 1357.8ms TimeCoverageRelationStatistics Valid=426, Invalid=3734, Unknown=0, NotChecked=0, Total=4160 [2021-07-13 19:40:54,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2993 states. [2021-07-13 19:40:54,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2993 to 2610. [2021-07-13 19:40:54,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2610 states, 2609 states have (on average 2.8443848217707934) internal successors, (7421), 2609 states have internal predecessors, (7421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:54,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2610 states to 2610 states and 7421 transitions. [2021-07-13 19:40:54,946 INFO L78 Accepts]: Start accepts. Automaton has 2610 states and 7421 transitions. Word has length 19 [2021-07-13 19:40:54,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:40:54,947 INFO L482 AbstractCegarLoop]: Abstraction has 2610 states and 7421 transitions. [2021-07-13 19:40:54,947 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:54,947 INFO L276 IsEmpty]: Start isEmpty. Operand 2610 states and 7421 transitions. [2021-07-13 19:40:54,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:40:54,949 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:40:54,949 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:40:55,150 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 591 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4420 [2021-07-13 19:40:55,150 INFO L430 AbstractCegarLoop]: === Iteration 601 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:40:55,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:40:55,150 INFO L82 PathProgramCache]: Analyzing trace with hash 754076772, now seen corresponding path program 587 times [2021-07-13 19:40:55,150 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:40:55,150 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831286541] [2021-07-13 19:40:55,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:40:55,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:40:55,259 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:55,259 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:40:55,259 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831286541] [2021-07-13 19:40:55,259 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1831286541] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:55,259 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2094943696] [2021-07-13 19:40:55,259 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 592 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 592 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:55,287 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:40:55,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:40:55,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 19:40:55,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:40:55,488 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:40:55,489 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:55,491 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:40:55,492 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:55,494 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:55,495 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:55,495 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:40:55,496 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:55,498 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:55,498 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:55,499 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:40:55,499 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:55,501 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:40:55,502 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:55,504 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:40:55,505 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:55,535 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-07-13 19:40:55,535 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:40:55,536 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:40:55,537 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-07-13 19:40:55,566 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:55,567 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2094943696] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:55,567 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:40:55,567 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-07-13 19:40:55,567 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576801512] [2021-07-13 19:40:55,567 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:40:55,567 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:40:55,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:40:55,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=370, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:40:55,567 INFO L87 Difference]: Start difference. First operand 2610 states and 7421 transitions. Second operand has 21 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:55,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:40:55,993 INFO L93 Difference]: Finished difference Result 2719 states and 7669 transitions. [2021-07-13 19:40:55,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-13 19:40:55,994 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:40:55,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:40:55,997 INFO L225 Difference]: With dead ends: 2719 [2021-07-13 19:40:55,997 INFO L226 Difference]: Without dead ends: 2713 [2021-07-13 19:40:55,997 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 461.8ms TimeCoverageRelationStatistics Valid=99, Invalid=771, Unknown=0, NotChecked=0, Total=870 [2021-07-13 19:40:55,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2713 states. [2021-07-13 19:40:56,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2713 to 2611. [2021-07-13 19:40:56,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2611 states, 2610 states have (on average 2.84367816091954) internal successors, (7422), 2610 states have internal predecessors, (7422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:56,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2611 states to 2611 states and 7422 transitions. [2021-07-13 19:40:56,025 INFO L78 Accepts]: Start accepts. Automaton has 2611 states and 7422 transitions. Word has length 19 [2021-07-13 19:40:56,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:40:56,025 INFO L482 AbstractCegarLoop]: Abstraction has 2611 states and 7422 transitions. [2021-07-13 19:40:56,025 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:56,025 INFO L276 IsEmpty]: Start isEmpty. Operand 2611 states and 7422 transitions. [2021-07-13 19:40:56,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:40:56,028 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:40:56,028 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:40:56,228 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4423,592 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:56,228 INFO L430 AbstractCegarLoop]: === Iteration 602 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:40:56,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:40:56,228 INFO L82 PathProgramCache]: Analyzing trace with hash -560330014, now seen corresponding path program 588 times [2021-07-13 19:40:56,228 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:40:56,228 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38333165] [2021-07-13 19:40:56,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:40:56,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:40:56,341 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:56,341 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:40:56,341 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38333165] [2021-07-13 19:40:56,341 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [38333165] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:56,341 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [288694018] [2021-07-13 19:40:56,341 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 593 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 593 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:56,371 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:40:56,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:40:56,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 19:40:56,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:40:56,553 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:56,553 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:56,554 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:40:56,554 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:56,557 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:56,557 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:40:56,557 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:56,580 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-07-13 19:40:56,580 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:40:56,581 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:40:56,581 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-07-13 19:40:56,603 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:56,603 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [288694018] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:56,603 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:40:56,603 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-07-13 19:40:56,604 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763211891] [2021-07-13 19:40:56,604 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:40:56,604 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:40:56,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:40:56,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=370, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:40:56,604 INFO L87 Difference]: Start difference. First operand 2611 states and 7422 transitions. Second operand has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:57,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:40:57,966 INFO L93 Difference]: Finished difference Result 2938 states and 8092 transitions. [2021-07-13 19:40:57,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-07-13 19:40:57,966 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:40:57,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:40:57,971 INFO L225 Difference]: With dead ends: 2938 [2021-07-13 19:40:57,971 INFO L226 Difference]: Without dead ends: 2938 [2021-07-13 19:40:57,971 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 488 ImplicationChecksByTransitivity, 922.3ms TimeCoverageRelationStatistics Valid=246, Invalid=2010, Unknown=0, NotChecked=0, Total=2256 [2021-07-13 19:40:57,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2938 states. [2021-07-13 19:40:57,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2938 to 2643. [2021-07-13 19:40:58,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2643 states, 2642 states have (on average 2.8497350492051474) internal successors, (7529), 2642 states have internal predecessors, (7529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:58,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2643 states to 2643 states and 7529 transitions. [2021-07-13 19:40:58,017 INFO L78 Accepts]: Start accepts. Automaton has 2643 states and 7529 transitions. Word has length 19 [2021-07-13 19:40:58,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:40:58,017 INFO L482 AbstractCegarLoop]: Abstraction has 2643 states and 7529 transitions. [2021-07-13 19:40:58,017 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:58,017 INFO L276 IsEmpty]: Start isEmpty. Operand 2643 states and 7529 transitions. [2021-07-13 19:40:58,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:40:58,020 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:40:58,020 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:40:58,220 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 593 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4430 [2021-07-13 19:40:58,220 INFO L430 AbstractCegarLoop]: === Iteration 603 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:40:58,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:40:58,220 INFO L82 PathProgramCache]: Analyzing trace with hash -1480030722, now seen corresponding path program 589 times [2021-07-13 19:40:58,220 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:40:58,221 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302058227] [2021-07-13 19:40:58,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:40:58,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:40:58,334 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:58,334 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:40:58,334 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302058227] [2021-07-13 19:40:58,334 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1302058227] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:58,334 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1399255663] [2021-07-13 19:40:58,334 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 594 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 594 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:58,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:40:58,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 19:40:58,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:40:58,555 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:40:58,556 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:58,559 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:40:58,559 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:58,562 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:58,562 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:58,562 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:40:58,563 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:58,565 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:58,566 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:58,566 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:40:58,567 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:58,569 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:40:58,570 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:58,572 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:40:58,572 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:58,602 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-07-13 19:40:58,602 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:40:58,603 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:40:58,603 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-07-13 19:40:58,632 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:58,632 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1399255663] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:58,632 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:40:58,632 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-07-13 19:40:58,632 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770587052] [2021-07-13 19:40:58,633 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:40:58,633 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:40:58,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:40:58,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=370, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:40:58,633 INFO L87 Difference]: Start difference. First operand 2643 states and 7529 transitions. Second operand has 21 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:59,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:40:59,337 INFO L93 Difference]: Finished difference Result 2827 states and 7907 transitions. [2021-07-13 19:40:59,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-13 19:40:59,337 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:40:59,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:40:59,341 INFO L225 Difference]: With dead ends: 2827 [2021-07-13 19:40:59,341 INFO L226 Difference]: Without dead ends: 2823 [2021-07-13 19:40:59,341 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 585.3ms TimeCoverageRelationStatistics Valid=126, Invalid=1134, Unknown=0, NotChecked=0, Total=1260 [2021-07-13 19:40:59,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2823 states. [2021-07-13 19:40:59,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2823 to 2659. [2021-07-13 19:40:59,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2659 states, 2658 states have (on average 2.8521444695259595) internal successors, (7581), 2658 states have internal predecessors, (7581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:59,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2659 states to 2659 states and 7581 transitions. [2021-07-13 19:40:59,369 INFO L78 Accepts]: Start accepts. Automaton has 2659 states and 7581 transitions. Word has length 19 [2021-07-13 19:40:59,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:40:59,369 INFO L482 AbstractCegarLoop]: Abstraction has 2659 states and 7581 transitions. [2021-07-13 19:40:59,369 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:59,369 INFO L276 IsEmpty]: Start isEmpty. Operand 2659 states and 7581 transitions. [2021-07-13 19:40:59,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:40:59,372 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:40:59,372 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:40:59,572 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4433,594 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:59,572 INFO L430 AbstractCegarLoop]: === Iteration 604 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:40:59,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:40:59,572 INFO L82 PathProgramCache]: Analyzing trace with hash -552599616, now seen corresponding path program 590 times [2021-07-13 19:40:59,572 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:40:59,573 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890078155] [2021-07-13 19:40:59,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:40:59,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:40:59,690 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:59,690 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:40:59,690 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890078155] [2021-07-13 19:40:59,690 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [890078155] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:59,690 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1489221646] [2021-07-13 19:40:59,690 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 595 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 595 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:59,742 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:40:59,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:40:59,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 19:40:59,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:40:59,886 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:59,886 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:59,886 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:40:59,887 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:59,889 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:59,890 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:59,890 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:40:59,890 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:59,893 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:59,893 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:59,893 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:40:59,894 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:59,896 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:59,896 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:40:59,897 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:59,929 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-07-13 19:40:59,929 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:40:59,929 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:40:59,929 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-07-13 19:41:00,001 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:00,002 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1489221646] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:00,002 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:41:00,002 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-07-13 19:41:00,002 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641848444] [2021-07-13 19:41:00,002 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:41:00,002 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:41:00,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:41:00,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=370, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:41:00,002 INFO L87 Difference]: Start difference. First operand 2659 states and 7581 transitions. Second operand has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:00,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:41:00,842 INFO L93 Difference]: Finished difference Result 2939 states and 8127 transitions. [2021-07-13 19:41:00,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-13 19:41:00,842 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:41:00,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:41:00,846 INFO L225 Difference]: With dead ends: 2939 [2021-07-13 19:41:00,846 INFO L226 Difference]: Without dead ends: 2939 [2021-07-13 19:41:00,846 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 631.2ms TimeCoverageRelationStatistics Valid=149, Invalid=1111, Unknown=0, NotChecked=0, Total=1260 [2021-07-13 19:41:00,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2939 states. [2021-07-13 19:41:00,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2939 to 2626. [2021-07-13 19:41:00,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2626 states, 2625 states have (on average 2.8445714285714288) internal successors, (7467), 2625 states have internal predecessors, (7467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:00,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2626 states to 2626 states and 7467 transitions. [2021-07-13 19:41:00,878 INFO L78 Accepts]: Start accepts. Automaton has 2626 states and 7467 transitions. Word has length 19 [2021-07-13 19:41:00,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:41:00,878 INFO L482 AbstractCegarLoop]: Abstraction has 2626 states and 7467 transitions. [2021-07-13 19:41:00,878 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:00,878 INFO L276 IsEmpty]: Start isEmpty. Operand 2626 states and 7467 transitions. [2021-07-13 19:41:00,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:41:00,881 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:41:00,881 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:41:01,081 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 595 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4440 [2021-07-13 19:41:01,081 INFO L430 AbstractCegarLoop]: === Iteration 605 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:41:01,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:41:01,081 INFO L82 PathProgramCache]: Analyzing trace with hash 249016612, now seen corresponding path program 591 times [2021-07-13 19:41:01,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:41:01,081 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925144137] [2021-07-13 19:41:01,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:41:01,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:41:01,197 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:01,197 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:41:01,197 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925144137] [2021-07-13 19:41:01,197 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1925144137] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:01,197 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [190027706] [2021-07-13 19:41:01,197 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 596 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 596 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:01,228 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 19:41:01,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:41:01,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 19:41:01,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:41:01,385 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:01,385 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:01,386 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:41:01,386 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:01,389 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:01,389 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:01,389 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:41:01,390 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:01,392 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:01,392 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:01,392 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:41:01,393 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:01,395 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:01,395 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:41:01,396 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:01,429 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-07-13 19:41:01,429 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:41:01,430 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:41:01,430 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-07-13 19:41:01,499 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:01,499 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [190027706] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:01,499 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:41:01,500 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-07-13 19:41:01,500 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756733179] [2021-07-13 19:41:01,500 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:41:01,500 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:41:01,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:41:01,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=370, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:41:01,500 INFO L87 Difference]: Start difference. First operand 2626 states and 7467 transitions. Second operand has 21 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:02,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:41:02,364 INFO L93 Difference]: Finished difference Result 2837 states and 7871 transitions. [2021-07-13 19:41:02,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-13 19:41:02,365 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:41:02,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:41:02,369 INFO L225 Difference]: With dead ends: 2837 [2021-07-13 19:41:02,369 INFO L226 Difference]: Without dead ends: 2833 [2021-07-13 19:41:02,369 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 709.4ms TimeCoverageRelationStatistics Valid=158, Invalid=1324, Unknown=0, NotChecked=0, Total=1482 [2021-07-13 19:41:02,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2833 states. [2021-07-13 19:41:02,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2833 to 2631. [2021-07-13 19:41:02,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2631 states, 2630 states have (on average 2.8456273764258557) internal successors, (7484), 2630 states have internal predecessors, (7484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:02,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2631 states to 2631 states and 7484 transitions. [2021-07-13 19:41:02,397 INFO L78 Accepts]: Start accepts. Automaton has 2631 states and 7484 transitions. Word has length 19 [2021-07-13 19:41:02,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:41:02,397 INFO L482 AbstractCegarLoop]: Abstraction has 2631 states and 7484 transitions. [2021-07-13 19:41:02,398 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:02,398 INFO L276 IsEmpty]: Start isEmpty. Operand 2631 states and 7484 transitions. [2021-07-13 19:41:02,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:41:02,400 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:41:02,400 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:41:02,600 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4444,596 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:02,601 INFO L430 AbstractCegarLoop]: === Iteration 606 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:41:02,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:41:02,601 INFO L82 PathProgramCache]: Analyzing trace with hash 1967360318, now seen corresponding path program 592 times [2021-07-13 19:41:02,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:41:02,601 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038327331] [2021-07-13 19:41:02,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:41:02,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:41:02,717 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:02,717 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:41:02,717 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038327331] [2021-07-13 19:41:02,717 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1038327331] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:02,717 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1002176107] [2021-07-13 19:41:02,717 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 597 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 597 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:02,745 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:41:02,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:41:02,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 19:41:02,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:41:02,901 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:02,902 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:02,902 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:41:02,903 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:02,905 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:02,905 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:02,906 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:41:02,906 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:02,908 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:02,909 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:02,909 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:41:02,910 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:02,911 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:02,912 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:41:02,913 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:02,945 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-07-13 19:41:02,945 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:41:02,945 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:41:02,945 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-07-13 19:41:03,000 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:03,001 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1002176107] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:03,001 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:41:03,001 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-07-13 19:41:03,001 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53228601] [2021-07-13 19:41:03,001 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:41:03,001 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:41:03,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:41:03,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=370, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:41:03,001 INFO L87 Difference]: Start difference. First operand 2631 states and 7484 transitions. Second operand has 21 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:03,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:41:03,440 INFO L93 Difference]: Finished difference Result 2820 states and 7846 transitions. [2021-07-13 19:41:03,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 19:41:03,440 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:41:03,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:41:03,444 INFO L225 Difference]: With dead ends: 2820 [2021-07-13 19:41:03,444 INFO L226 Difference]: Without dead ends: 2820 [2021-07-13 19:41:03,445 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 424.5ms TimeCoverageRelationStatistics Valid=84, Invalid=566, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:41:03,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2820 states. [2021-07-13 19:41:03,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2820 to 2619. [2021-07-13 19:41:03,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2619 states, 2618 states have (on average 2.8433919022154317) internal successors, (7444), 2618 states have internal predecessors, (7444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:03,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2619 states to 2619 states and 7444 transitions. [2021-07-13 19:41:03,477 INFO L78 Accepts]: Start accepts. Automaton has 2619 states and 7444 transitions. Word has length 19 [2021-07-13 19:41:03,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:41:03,477 INFO L482 AbstractCegarLoop]: Abstraction has 2619 states and 7444 transitions. [2021-07-13 19:41:03,477 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:03,477 INFO L276 IsEmpty]: Start isEmpty. Operand 2619 states and 7444 transitions. [2021-07-13 19:41:03,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:41:03,480 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:41:03,480 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:41:03,680 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 597 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4450 [2021-07-13 19:41:03,681 INFO L430 AbstractCegarLoop]: === Iteration 607 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:41:03,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:41:03,681 INFO L82 PathProgramCache]: Analyzing trace with hash 1648920354, now seen corresponding path program 593 times [2021-07-13 19:41:03,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:41:03,681 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306412280] [2021-07-13 19:41:03,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:41:03,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:41:03,768 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:03,768 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:41:03,768 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306412280] [2021-07-13 19:41:03,768 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [306412280] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:03,769 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1493326445] [2021-07-13 19:41:03,769 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 598 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 598 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:03,797 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:41:03,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:41:03,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 19:41:03,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:41:03,954 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:03,954 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:03,955 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:41:03,955 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:03,958 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:03,958 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:41:03,958 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:03,980 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-07-13 19:41:03,981 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:41:03,981 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:41:03,981 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-07-13 19:41:04,003 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:04,003 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1493326445] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:04,003 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:41:04,003 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 20 [2021-07-13 19:41:04,003 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231226516] [2021-07-13 19:41:04,003 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 19:41:04,003 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:41:04,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 19:41:04,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=333, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:41:04,004 INFO L87 Difference]: Start difference. First operand 2619 states and 7444 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:04,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:41:04,356 INFO L93 Difference]: Finished difference Result 2878 states and 8003 transitions. [2021-07-13 19:41:04,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 19:41:04,356 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:41:04,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:41:04,360 INFO L225 Difference]: With dead ends: 2878 [2021-07-13 19:41:04,360 INFO L226 Difference]: Without dead ends: 2878 [2021-07-13 19:41:04,360 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 215.3ms TimeCoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:41:04,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2878 states. [2021-07-13 19:41:04,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2878 to 2640. [2021-07-13 19:41:04,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2640 states, 2639 states have (on average 2.843501326259947) internal successors, (7504), 2639 states have internal predecessors, (7504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:04,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2640 states to 2640 states and 7504 transitions. [2021-07-13 19:41:04,389 INFO L78 Accepts]: Start accepts. Automaton has 2640 states and 7504 transitions. Word has length 19 [2021-07-13 19:41:04,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:41:04,389 INFO L482 AbstractCegarLoop]: Abstraction has 2640 states and 7504 transitions. [2021-07-13 19:41:04,389 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:04,389 INFO L276 IsEmpty]: Start isEmpty. Operand 2640 states and 7504 transitions. [2021-07-13 19:41:04,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:41:04,391 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:41:04,391 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:41:04,592 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4454,598 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:04,592 INFO L430 AbstractCegarLoop]: === Iteration 608 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:41:04,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:41:04,592 INFO L82 PathProgramCache]: Analyzing trace with hash -1715164354, now seen corresponding path program 594 times [2021-07-13 19:41:04,592 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:41:04,592 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258265777] [2021-07-13 19:41:04,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:41:04,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:41:04,682 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:04,682 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:41:04,682 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258265777] [2021-07-13 19:41:04,682 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1258265777] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:04,682 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [881689783] [2021-07-13 19:41:04,682 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 599 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 599 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:04,710 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:41:04,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:41:04,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 19:41:04,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:41:04,893 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:41:04,894 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:04,896 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:41:04,897 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:04,899 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:04,899 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:04,899 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:41:04,900 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:04,902 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:04,903 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:04,903 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:41:04,904 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:04,906 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:41:04,907 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:04,909 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:41:04,910 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:04,938 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-07-13 19:41:04,939 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:41:04,940 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:41:04,940 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-07-13 19:41:04,968 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:04,968 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [881689783] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:04,968 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:41:04,968 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 20 [2021-07-13 19:41:04,968 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966140546] [2021-07-13 19:41:04,968 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 19:41:04,968 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:41:04,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 19:41:04,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=333, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:41:04,969 INFO L87 Difference]: Start difference. First operand 2640 states and 7504 transitions. Second operand has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:05,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:41:05,564 INFO L93 Difference]: Finished difference Result 2788 states and 7799 transitions. [2021-07-13 19:41:05,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-13 19:41:05,564 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:41:05,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:41:05,568 INFO L225 Difference]: With dead ends: 2788 [2021-07-13 19:41:05,568 INFO L226 Difference]: Without dead ends: 2780 [2021-07-13 19:41:05,568 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 474.7ms TimeCoverageRelationStatistics Valid=111, Invalid=1011, Unknown=0, NotChecked=0, Total=1122 [2021-07-13 19:41:05,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2780 states. [2021-07-13 19:41:05,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2780 to 2643. [2021-07-13 19:41:05,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2643 states, 2642 states have (on average 2.841029523088569) internal successors, (7506), 2642 states have internal predecessors, (7506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:05,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2643 states to 2643 states and 7506 transitions. [2021-07-13 19:41:05,595 INFO L78 Accepts]: Start accepts. Automaton has 2643 states and 7506 transitions. Word has length 19 [2021-07-13 19:41:05,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:41:05,595 INFO L482 AbstractCegarLoop]: Abstraction has 2643 states and 7506 transitions. [2021-07-13 19:41:05,595 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:05,595 INFO L276 IsEmpty]: Start isEmpty. Operand 2643 states and 7506 transitions. [2021-07-13 19:41:05,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:41:05,597 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:41:05,598 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:41:05,798 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4457,599 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:05,798 INFO L430 AbstractCegarLoop]: === Iteration 609 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:41:05,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:41:05,798 INFO L82 PathProgramCache]: Analyzing trace with hash 487898240, now seen corresponding path program 595 times [2021-07-13 19:41:05,798 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:41:05,798 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090815946] [2021-07-13 19:41:05,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:41:05,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:41:05,889 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:05,889 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:41:05,889 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090815946] [2021-07-13 19:41:05,889 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1090815946] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:05,889 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [555254950] [2021-07-13 19:41:05,889 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 600 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 600 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:05,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:41:05,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 19:41:05,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:41:06,078 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:06,079 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:06,079 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:41:06,080 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:06,082 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:06,082 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:41:06,083 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:06,105 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-07-13 19:41:06,105 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:41:06,105 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:41:06,105 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-07-13 19:41:06,126 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:06,126 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [555254950] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:06,126 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:41:06,127 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 20 [2021-07-13 19:41:06,127 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152080168] [2021-07-13 19:41:06,127 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 19:41:06,127 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:41:06,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 19:41:06,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=332, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:41:06,127 INFO L87 Difference]: Start difference. First operand 2643 states and 7506 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:07,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:41:07,296 INFO L93 Difference]: Finished difference Result 2992 states and 8230 transitions. [2021-07-13 19:41:07,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-07-13 19:41:07,297 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:41:07,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:41:07,301 INFO L225 Difference]: With dead ends: 2992 [2021-07-13 19:41:07,301 INFO L226 Difference]: Without dead ends: 2992 [2021-07-13 19:41:07,301 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 528 ImplicationChecksByTransitivity, 845.0ms TimeCoverageRelationStatistics Valid=260, Invalid=1996, Unknown=0, NotChecked=0, Total=2256 [2021-07-13 19:41:07,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2992 states. [2021-07-13 19:41:07,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2992 to 2643. [2021-07-13 19:41:07,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2643 states, 2642 states have (on average 2.842543527630583) internal successors, (7510), 2642 states have internal predecessors, (7510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:07,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2643 states to 2643 states and 7510 transitions. [2021-07-13 19:41:07,330 INFO L78 Accepts]: Start accepts. Automaton has 2643 states and 7510 transitions. Word has length 19 [2021-07-13 19:41:07,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:41:07,330 INFO L482 AbstractCegarLoop]: Abstraction has 2643 states and 7510 transitions. [2021-07-13 19:41:07,330 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:07,330 INFO L276 IsEmpty]: Start isEmpty. Operand 2643 states and 7510 transitions. [2021-07-13 19:41:07,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:41:07,333 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:41:07,333 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:41:07,533 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 600 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4464 [2021-07-13 19:41:07,533 INFO L430 AbstractCegarLoop]: === Iteration 610 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:41:07,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:41:07,534 INFO L82 PathProgramCache]: Analyzing trace with hash 2041947364, now seen corresponding path program 596 times [2021-07-13 19:41:07,534 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:41:07,534 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716739932] [2021-07-13 19:41:07,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:41:07,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:41:07,635 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:07,635 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:41:07,636 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716739932] [2021-07-13 19:41:07,636 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1716739932] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:07,636 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1764428428] [2021-07-13 19:41:07,636 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 601 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 601 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:07,662 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:41:07,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:41:07,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 19:41:07,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:41:07,841 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:41:07,842 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:07,844 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:41:07,845 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:07,848 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:07,848 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:07,848 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:41:07,849 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:07,851 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:07,852 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:07,852 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:41:07,853 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:07,855 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:41:07,855 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:07,857 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:41:07,858 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:07,887 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-07-13 19:41:07,888 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:41:07,888 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:41:07,889 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-07-13 19:41:07,917 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:07,917 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1764428428] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:07,917 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:41:07,917 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 20 [2021-07-13 19:41:07,917 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606618182] [2021-07-13 19:41:07,917 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 19:41:07,917 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:41:07,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 19:41:07,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=332, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:41:07,917 INFO L87 Difference]: Start difference. First operand 2643 states and 7510 transitions. Second operand has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:08,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:41:08,593 INFO L93 Difference]: Finished difference Result 2795 states and 7814 transitions. [2021-07-13 19:41:08,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-13 19:41:08,593 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:41:08,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:41:08,597 INFO L225 Difference]: With dead ends: 2795 [2021-07-13 19:41:08,597 INFO L226 Difference]: Without dead ends: 2789 [2021-07-13 19:41:08,598 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 617.9ms TimeCoverageRelationStatistics Valid=158, Invalid=1324, Unknown=0, NotChecked=0, Total=1482 [2021-07-13 19:41:08,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2789 states. [2021-07-13 19:41:08,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2789 to 2645. [2021-07-13 19:41:08,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2645 states, 2644 states have (on average 2.8419062027231465) internal successors, (7514), 2644 states have internal predecessors, (7514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:08,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2645 states to 2645 states and 7514 transitions. [2021-07-13 19:41:08,636 INFO L78 Accepts]: Start accepts. Automaton has 2645 states and 7514 transitions. Word has length 19 [2021-07-13 19:41:08,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:41:08,636 INFO L482 AbstractCegarLoop]: Abstraction has 2645 states and 7514 transitions. [2021-07-13 19:41:08,636 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:08,636 INFO L276 IsEmpty]: Start isEmpty. Operand 2645 states and 7514 transitions. [2021-07-13 19:41:08,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:41:08,638 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:41:08,638 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:41:08,839 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4467,601 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:08,839 INFO L430 AbstractCegarLoop]: === Iteration 611 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:41:08,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:41:08,839 INFO L82 PathProgramCache]: Analyzing trace with hash 727540578, now seen corresponding path program 597 times [2021-07-13 19:41:08,839 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:41:08,839 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936308498] [2021-07-13 19:41:08,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:41:08,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:41:08,927 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:08,928 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:41:08,928 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936308498] [2021-07-13 19:41:08,928 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936308498] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:08,928 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [649612963] [2021-07-13 19:41:08,928 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 602 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 602 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:08,958 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-13 19:41:08,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:41:08,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 19:41:08,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:41:09,123 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:09,124 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:09,124 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:41:09,125 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:09,127 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:09,127 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:41:09,128 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:09,150 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-07-13 19:41:09,150 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:41:09,150 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:41:09,150 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-07-13 19:41:09,171 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:09,171 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [649612963] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:09,171 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:41:09,171 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 20 [2021-07-13 19:41:09,171 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982504892] [2021-07-13 19:41:09,172 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 19:41:09,172 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:41:09,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 19:41:09,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:41:09,172 INFO L87 Difference]: Start difference. First operand 2645 states and 7514 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:10,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:41:10,116 INFO L93 Difference]: Finished difference Result 2917 states and 8065 transitions. [2021-07-13 19:41:10,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-07-13 19:41:10,116 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:41:10,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:41:10,120 INFO L225 Difference]: With dead ends: 2917 [2021-07-13 19:41:10,120 INFO L226 Difference]: Without dead ends: 2917 [2021-07-13 19:41:10,120 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 422 ImplicationChecksByTransitivity, 718.4ms TimeCoverageRelationStatistics Valid=205, Invalid=1687, Unknown=0, NotChecked=0, Total=1892 [2021-07-13 19:41:10,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2917 states. [2021-07-13 19:41:10,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2917 to 2633. [2021-07-13 19:41:10,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2633 states, 2632 states have (on average 2.8404255319148937) internal successors, (7476), 2632 states have internal predecessors, (7476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:10,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2633 states to 2633 states and 7476 transitions. [2021-07-13 19:41:10,149 INFO L78 Accepts]: Start accepts. Automaton has 2633 states and 7476 transitions. Word has length 19 [2021-07-13 19:41:10,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:41:10,149 INFO L482 AbstractCegarLoop]: Abstraction has 2633 states and 7476 transitions. [2021-07-13 19:41:10,149 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:10,149 INFO L276 IsEmpty]: Start isEmpty. Operand 2633 states and 7476 transitions. [2021-07-13 19:41:10,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:41:10,152 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:41:10,152 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:41:10,352 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 602 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4474 [2021-07-13 19:41:10,352 INFO L430 AbstractCegarLoop]: === Iteration 612 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:41:10,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:41:10,353 INFO L82 PathProgramCache]: Analyzing trace with hash -192160130, now seen corresponding path program 598 times [2021-07-13 19:41:10,353 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:41:10,353 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730864906] [2021-07-13 19:41:10,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:41:10,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:41:10,445 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:10,446 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:41:10,446 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730864906] [2021-07-13 19:41:10,446 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [730864906] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:10,446 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [789109121] [2021-07-13 19:41:10,446 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 603 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 603 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:10,473 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:41:10,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:41:10,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 19:41:10,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:41:10,647 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:41:10,648 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:10,650 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:41:10,651 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:10,653 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:10,654 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:10,654 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:41:10,655 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:10,657 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:10,657 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:10,658 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:41:10,658 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:10,660 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:41:10,661 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:10,663 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:41:10,664 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:10,693 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-07-13 19:41:10,694 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:41:10,695 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:41:10,695 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-07-13 19:41:10,723 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:10,724 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [789109121] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:10,724 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:41:10,724 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 20 [2021-07-13 19:41:10,724 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496831637] [2021-07-13 19:41:10,724 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 19:41:10,724 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:41:10,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 19:41:10,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:41:10,724 INFO L87 Difference]: Start difference. First operand 2633 states and 7476 transitions. Second operand has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:11,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:41:11,249 INFO L93 Difference]: Finished difference Result 2741 states and 7725 transitions. [2021-07-13 19:41:11,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-13 19:41:11,249 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:41:11,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:41:11,253 INFO L225 Difference]: With dead ends: 2741 [2021-07-13 19:41:11,253 INFO L226 Difference]: Without dead ends: 2736 [2021-07-13 19:41:11,253 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 486.5ms TimeCoverageRelationStatistics Valid=116, Invalid=876, Unknown=0, NotChecked=0, Total=992 [2021-07-13 19:41:11,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2736 states. [2021-07-13 19:41:11,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2736 to 2635. [2021-07-13 19:41:11,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2635 states, 2634 states have (on average 2.8390280941533788) internal successors, (7478), 2634 states have internal predecessors, (7478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:11,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2635 states to 2635 states and 7478 transitions. [2021-07-13 19:41:11,282 INFO L78 Accepts]: Start accepts. Automaton has 2635 states and 7478 transitions. Word has length 19 [2021-07-13 19:41:11,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:41:11,282 INFO L482 AbstractCegarLoop]: Abstraction has 2635 states and 7478 transitions. [2021-07-13 19:41:11,282 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:11,282 INFO L276 IsEmpty]: Start isEmpty. Operand 2635 states and 7478 transitions. [2021-07-13 19:41:11,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:41:11,285 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:41:11,285 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:41:11,485 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4477,603 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:11,485 INFO L430 AbstractCegarLoop]: === Iteration 613 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:41:11,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:41:11,486 INFO L82 PathProgramCache]: Analyzing trace with hash 735270976, now seen corresponding path program 599 times [2021-07-13 19:41:11,486 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:41:11,486 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855275648] [2021-07-13 19:41:11,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:41:11,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:41:11,585 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:11,585 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:41:11,585 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855275648] [2021-07-13 19:41:11,585 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [855275648] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:11,585 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1298432864] [2021-07-13 19:41:11,585 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 604 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 604 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:11,614 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-13 19:41:11,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:41:11,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 19:41:11,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:41:11,745 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:11,746 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:11,746 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:41:11,747 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:11,749 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:11,749 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:11,749 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:41:11,750 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:11,752 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:11,752 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:11,753 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:41:11,753 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:11,755 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:11,755 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:41:11,756 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:11,789 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-07-13 19:41:11,789 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:41:11,789 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:41:11,789 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-07-13 19:41:11,841 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:11,841 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1298432864] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:11,841 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:41:11,841 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 20 [2021-07-13 19:41:11,841 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704110993] [2021-07-13 19:41:11,841 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 19:41:11,841 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:41:11,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 19:41:11,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:41:11,842 INFO L87 Difference]: Start difference. First operand 2635 states and 7478 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:12,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:41:12,593 INFO L93 Difference]: Finished difference Result 2939 states and 8138 transitions. [2021-07-13 19:41:12,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-13 19:41:12,594 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:41:12,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:41:12,598 INFO L225 Difference]: With dead ends: 2939 [2021-07-13 19:41:12,598 INFO L226 Difference]: Without dead ends: 2938 [2021-07-13 19:41:12,598 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 602.7ms TimeCoverageRelationStatistics Valid=163, Invalid=1169, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 19:41:12,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2938 states. [2021-07-13 19:41:12,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2938 to 2627. [2021-07-13 19:41:12,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2627 states, 2626 states have (on average 2.837014470677837) internal successors, (7450), 2626 states have internal predecessors, (7450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:12,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2627 states to 2627 states and 7450 transitions. [2021-07-13 19:41:12,628 INFO L78 Accepts]: Start accepts. Automaton has 2627 states and 7450 transitions. Word has length 19 [2021-07-13 19:41:12,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:41:12,629 INFO L482 AbstractCegarLoop]: Abstraction has 2627 states and 7450 transitions. [2021-07-13 19:41:12,629 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:12,629 INFO L276 IsEmpty]: Start isEmpty. Operand 2627 states and 7450 transitions. [2021-07-13 19:41:12,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:41:12,631 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:41:12,631 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:41:12,832 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4484,604 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:12,832 INFO L430 AbstractCegarLoop]: === Iteration 614 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:41:12,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:41:12,832 INFO L82 PathProgramCache]: Analyzing trace with hash 1536887204, now seen corresponding path program 600 times [2021-07-13 19:41:12,832 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:41:12,832 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965249908] [2021-07-13 19:41:12,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:41:12,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:41:12,932 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:12,933 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:41:12,933 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965249908] [2021-07-13 19:41:12,933 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [965249908] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:12,933 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [231159800] [2021-07-13 19:41:12,933 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 605 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 605 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:12,960 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:41:12,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:41:12,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 19:41:12,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:41:13,089 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:13,089 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:13,090 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:41:13,090 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:13,092 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:13,093 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:13,093 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:41:13,094 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:13,096 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:13,096 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:13,096 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:41:13,097 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:13,099 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:13,099 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:41:13,100 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:13,132 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-07-13 19:41:13,132 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:41:13,133 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:41:13,133 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-07-13 19:41:13,198 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:13,198 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [231159800] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:13,198 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:41:13,198 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 20 [2021-07-13 19:41:13,198 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708614357] [2021-07-13 19:41:13,199 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 19:41:13,199 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:41:13,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 19:41:13,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:41:13,199 INFO L87 Difference]: Start difference. First operand 2627 states and 7450 transitions. Second operand has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:14,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:41:14,066 INFO L93 Difference]: Finished difference Result 2856 states and 7924 transitions. [2021-07-13 19:41:14,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-07-13 19:41:14,066 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:41:14,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:41:14,071 INFO L225 Difference]: With dead ends: 2856 [2021-07-13 19:41:14,071 INFO L226 Difference]: Without dead ends: 2852 [2021-07-13 19:41:14,071 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 405 ImplicationChecksByTransitivity, 745.1ms TimeCoverageRelationStatistics Valid=199, Invalid=1607, Unknown=0, NotChecked=0, Total=1806 [2021-07-13 19:41:14,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2852 states. [2021-07-13 19:41:14,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2852 to 2647. [2021-07-13 19:41:14,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2647 states, 2646 states have (on average 2.8412698412698414) internal successors, (7518), 2646 states have internal predecessors, (7518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:14,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2647 states to 2647 states and 7518 transitions. [2021-07-13 19:41:14,101 INFO L78 Accepts]: Start accepts. Automaton has 2647 states and 7518 transitions. Word has length 19 [2021-07-13 19:41:14,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:41:14,101 INFO L482 AbstractCegarLoop]: Abstraction has 2647 states and 7518 transitions. [2021-07-13 19:41:14,101 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:14,101 INFO L276 IsEmpty]: Start isEmpty. Operand 2647 states and 7518 transitions. [2021-07-13 19:41:14,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:41:14,104 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:41:14,104 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:41:14,304 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4488,605 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:14,304 INFO L430 AbstractCegarLoop]: === Iteration 615 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:41:14,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:41:14,304 INFO L82 PathProgramCache]: Analyzing trace with hash -1039736386, now seen corresponding path program 601 times [2021-07-13 19:41:14,304 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:41:14,304 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340091933] [2021-07-13 19:41:14,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:41:14,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:41:14,405 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:14,405 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:41:14,405 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340091933] [2021-07-13 19:41:14,405 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [340091933] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:14,405 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1500086357] [2021-07-13 19:41:14,405 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 606 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 606 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:14,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:41:14,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 19:41:14,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:41:14,575 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:14,575 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:14,576 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:41:14,576 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:14,578 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:14,579 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:14,579 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:41:14,580 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:14,582 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:14,582 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:14,582 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:41:14,583 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:14,585 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:14,585 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:41:14,586 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:14,620 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-07-13 19:41:14,620 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:41:14,621 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:41:14,621 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-07-13 19:41:14,674 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:14,675 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1500086357] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:14,675 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:41:14,675 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 20 [2021-07-13 19:41:14,675 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601927507] [2021-07-13 19:41:14,675 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 19:41:14,675 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:41:14,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 19:41:14,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:41:14,675 INFO L87 Difference]: Start difference. First operand 2647 states and 7518 transitions. Second operand has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:15,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:41:15,218 INFO L93 Difference]: Finished difference Result 2846 states and 7910 transitions. [2021-07-13 19:41:15,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-13 19:41:15,218 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:41:15,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:41:15,222 INFO L225 Difference]: With dead ends: 2846 [2021-07-13 19:41:15,222 INFO L226 Difference]: Without dead ends: 2846 [2021-07-13 19:41:15,222 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 464.4ms TimeCoverageRelationStatistics Valid=113, Invalid=757, Unknown=0, NotChecked=0, Total=870 [2021-07-13 19:41:15,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2846 states. [2021-07-13 19:41:15,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2846 to 2620. [2021-07-13 19:41:15,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2620 states, 2619 states have (on average 2.8381061473844977) internal successors, (7433), 2619 states have internal predecessors, (7433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:15,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2620 states to 2620 states and 7433 transitions. [2021-07-13 19:41:15,251 INFO L78 Accepts]: Start accepts. Automaton has 2620 states and 7433 transitions. Word has length 19 [2021-07-13 19:41:15,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:41:15,251 INFO L482 AbstractCegarLoop]: Abstraction has 2620 states and 7433 transitions. [2021-07-13 19:41:15,251 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:15,251 INFO L276 IsEmpty]: Start isEmpty. Operand 2620 states and 7433 transitions. [2021-07-13 19:41:15,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:41:15,253 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:41:15,254 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:41:15,454 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 606 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4494 [2021-07-13 19:41:15,454 INFO L430 AbstractCegarLoop]: === Iteration 616 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:41:15,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:41:15,454 INFO L82 PathProgramCache]: Analyzing trace with hash 714264768, now seen corresponding path program 602 times [2021-07-13 19:41:15,454 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:41:15,454 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222131771] [2021-07-13 19:41:15,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:41:15,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:41:15,532 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:41:15,532 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:41:15,532 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222131771] [2021-07-13 19:41:15,532 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [222131771] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:15,532 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2134340651] [2021-07-13 19:41:15,532 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 607 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 607 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:15,559 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:41:15,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:41:15,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 19:41:15,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:41:15,664 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:15,665 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:15,665 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:41:15,666 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:15,668 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:15,668 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:15,669 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:41:15,669 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:15,671 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:15,672 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:15,672 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:41:15,673 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:15,674 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:15,675 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:41:15,676 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:15,718 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-07-13 19:41:15,718 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:41:15,719 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:41:15,719 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-07-13 19:41:15,769 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:15,769 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2134340651] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:15,769 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:41:15,769 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 19 [2021-07-13 19:41:15,769 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221269325] [2021-07-13 19:41:15,769 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:41:15,769 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:41:15,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:41:15,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:41:15,770 INFO L87 Difference]: Start difference. First operand 2620 states and 7433 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:16,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:41:16,642 INFO L93 Difference]: Finished difference Result 2865 states and 7971 transitions. [2021-07-13 19:41:16,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-07-13 19:41:16,642 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:41:16,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:41:16,646 INFO L225 Difference]: With dead ends: 2865 [2021-07-13 19:41:16,646 INFO L226 Difference]: Without dead ends: 2863 [2021-07-13 19:41:16,646 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 427 ImplicationChecksByTransitivity, 705.1ms TimeCoverageRelationStatistics Valid=221, Invalid=1585, Unknown=0, NotChecked=0, Total=1806 [2021-07-13 19:41:16,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2863 states. [2021-07-13 19:41:16,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2863 to 2641. [2021-07-13 19:41:16,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2641 states, 2640 states have (on average 2.8401515151515153) internal successors, (7498), 2640 states have internal predecessors, (7498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:16,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2641 states to 2641 states and 7498 transitions. [2021-07-13 19:41:16,676 INFO L78 Accepts]: Start accepts. Automaton has 2641 states and 7498 transitions. Word has length 19 [2021-07-13 19:41:16,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:41:16,676 INFO L482 AbstractCegarLoop]: Abstraction has 2641 states and 7498 transitions. [2021-07-13 19:41:16,676 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:16,676 INFO L276 IsEmpty]: Start isEmpty. Operand 2641 states and 7498 transitions. [2021-07-13 19:41:16,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:41:16,679 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:41:16,679 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:41:16,892 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4498,607 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:16,893 INFO L430 AbstractCegarLoop]: === Iteration 617 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:41:16,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:41:16,893 INFO L82 PathProgramCache]: Analyzing trace with hash -1060742594, now seen corresponding path program 603 times [2021-07-13 19:41:16,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:41:16,893 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677677117] [2021-07-13 19:41:16,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:41:16,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:41:16,991 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:41:16,991 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:41:16,991 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677677117] [2021-07-13 19:41:16,991 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677677117] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:16,991 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [842979249] [2021-07-13 19:41:16,991 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 608 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 608 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:17,020 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 19:41:17,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:41:17,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 19:41:17,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:41:17,125 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:17,125 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:17,125 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:41:17,126 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:17,128 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:17,129 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:17,129 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:41:17,129 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:17,131 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:17,132 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:17,132 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:41:17,133 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:17,135 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:17,135 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:41:17,136 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:17,168 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-07-13 19:41:17,168 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:41:17,168 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:41:17,169 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-07-13 19:41:17,223 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:17,223 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [842979249] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:17,223 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:41:17,223 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 19 [2021-07-13 19:41:17,223 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712558773] [2021-07-13 19:41:17,223 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:41:17,223 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:41:17,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:41:17,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:41:17,223 INFO L87 Difference]: Start difference. First operand 2641 states and 7498 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:17,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:41:17,876 INFO L93 Difference]: Finished difference Result 2868 states and 7983 transitions. [2021-07-13 19:41:17,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-13 19:41:17,877 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:41:17,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:41:17,881 INFO L225 Difference]: With dead ends: 2868 [2021-07-13 19:41:17,881 INFO L226 Difference]: Without dead ends: 2868 [2021-07-13 19:41:17,881 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 493.1ms TimeCoverageRelationStatistics Valid=139, Invalid=1051, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 19:41:17,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2868 states. [2021-07-13 19:41:17,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2868 to 2641. [2021-07-13 19:41:17,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2641 states, 2640 states have (on average 2.8401515151515153) internal successors, (7498), 2640 states have internal predecessors, (7498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:17,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2641 states to 2641 states and 7498 transitions. [2021-07-13 19:41:17,909 INFO L78 Accepts]: Start accepts. Automaton has 2641 states and 7498 transitions. Word has length 19 [2021-07-13 19:41:17,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:41:17,910 INFO L482 AbstractCegarLoop]: Abstraction has 2641 states and 7498 transitions. [2021-07-13 19:41:17,910 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:17,910 INFO L276 IsEmpty]: Start isEmpty. Operand 2641 states and 7498 transitions. [2021-07-13 19:41:17,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:41:17,912 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:41:17,912 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:41:18,112 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4502,608 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:18,113 INFO L430 AbstractCegarLoop]: === Iteration 618 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:41:18,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:41:18,113 INFO L82 PathProgramCache]: Analyzing trace with hash -163294208, now seen corresponding path program 604 times [2021-07-13 19:41:18,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:41:18,113 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046083109] [2021-07-13 19:41:18,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:41:18,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:41:18,210 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:18,210 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:41:18,210 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046083109] [2021-07-13 19:41:18,210 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2046083109] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:18,210 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1611777643] [2021-07-13 19:41:18,211 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 609 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 609 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:18,236 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:41:18,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:41:18,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 19:41:18,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:41:18,400 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:18,400 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:18,400 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:41:18,401 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:18,403 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:18,403 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:41:18,404 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:18,426 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-07-13 19:41:18,426 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:41:18,427 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:41:18,427 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-07-13 19:41:18,460 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:18,461 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1611777643] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:18,461 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:41:18,461 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 20 [2021-07-13 19:41:18,461 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754535935] [2021-07-13 19:41:18,461 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 19:41:18,461 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:41:18,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 19:41:18,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:41:18,461 INFO L87 Difference]: Start difference. First operand 2641 states and 7498 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:18,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:41:18,911 INFO L93 Difference]: Finished difference Result 2943 states and 8179 transitions. [2021-07-13 19:41:18,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 19:41:18,912 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:41:18,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:41:18,915 INFO L225 Difference]: With dead ends: 2943 [2021-07-13 19:41:18,916 INFO L226 Difference]: Without dead ends: 2943 [2021-07-13 19:41:18,916 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 297.9ms TimeCoverageRelationStatistics Valid=73, Invalid=527, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:41:18,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2943 states. [2021-07-13 19:41:18,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2943 to 2653. [2021-07-13 19:41:18,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2653 states, 2652 states have (on average 2.842006033182504) internal successors, (7537), 2652 states have internal predecessors, (7537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:18,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2653 states to 2653 states and 7537 transitions. [2021-07-13 19:41:18,945 INFO L78 Accepts]: Start accepts. Automaton has 2653 states and 7537 transitions. Word has length 19 [2021-07-13 19:41:18,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:41:18,945 INFO L482 AbstractCegarLoop]: Abstraction has 2653 states and 7537 transitions. [2021-07-13 19:41:18,945 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:18,945 INFO L276 IsEmpty]: Start isEmpty. Operand 2653 states and 7537 transitions. [2021-07-13 19:41:18,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:41:18,948 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:41:18,948 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:41:19,148 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 609 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4506 [2021-07-13 19:41:19,148 INFO L430 AbstractCegarLoop]: === Iteration 619 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:41:19,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:41:19,148 INFO L82 PathProgramCache]: Analyzing trace with hash 1390754916, now seen corresponding path program 605 times [2021-07-13 19:41:19,148 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:41:19,148 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79242207] [2021-07-13 19:41:19,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:41:19,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:41:19,234 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:19,234 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:41:19,235 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79242207] [2021-07-13 19:41:19,235 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79242207] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:19,235 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [304708434] [2021-07-13 19:41:19,235 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 610 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 610 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:19,263 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:41:19,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:41:19,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 19:41:19,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:41:19,446 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:41:19,447 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:19,449 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:41:19,450 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:19,452 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:19,453 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:19,453 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:41:19,454 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:19,456 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:19,456 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:19,456 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:41:19,457 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:19,459 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:41:19,460 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:19,462 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:41:19,463 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:19,492 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-07-13 19:41:19,492 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:41:19,493 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:41:19,493 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-07-13 19:41:19,521 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:19,521 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [304708434] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:19,521 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:41:19,521 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 20 [2021-07-13 19:41:19,521 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010492590] [2021-07-13 19:41:19,521 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 19:41:19,521 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:41:19,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 19:41:19,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:41:19,522 INFO L87 Difference]: Start difference. First operand 2653 states and 7537 transitions. Second operand has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:20,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:41:20,126 INFO L93 Difference]: Finished difference Result 2806 states and 7847 transitions. [2021-07-13 19:41:20,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-13 19:41:20,127 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:41:20,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:41:20,130 INFO L225 Difference]: With dead ends: 2806 [2021-07-13 19:41:20,130 INFO L226 Difference]: Without dead ends: 2800 [2021-07-13 19:41:20,131 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 568.9ms TimeCoverageRelationStatistics Valid=146, Invalid=1260, Unknown=0, NotChecked=0, Total=1406 [2021-07-13 19:41:20,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2800 states. [2021-07-13 19:41:20,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2800 to 2654. [2021-07-13 19:41:20,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2654 states, 2653 states have (on average 2.838673200150773) internal successors, (7531), 2653 states have internal predecessors, (7531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:20,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2654 states to 2654 states and 7531 transitions. [2021-07-13 19:41:20,159 INFO L78 Accepts]: Start accepts. Automaton has 2654 states and 7531 transitions. Word has length 19 [2021-07-13 19:41:20,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:41:20,159 INFO L482 AbstractCegarLoop]: Abstraction has 2654 states and 7531 transitions. [2021-07-13 19:41:20,159 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:20,159 INFO L276 IsEmpty]: Start isEmpty. Operand 2654 states and 7531 transitions. [2021-07-13 19:41:20,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:41:20,162 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:41:20,162 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:41:20,362 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4509,610 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:20,362 INFO L430 AbstractCegarLoop]: === Iteration 620 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:41:20,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:41:20,363 INFO L82 PathProgramCache]: Analyzing trace with hash 76348130, now seen corresponding path program 606 times [2021-07-13 19:41:20,363 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:41:20,363 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909534114] [2021-07-13 19:41:20,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:41:20,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:41:20,463 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:20,463 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:41:20,463 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909534114] [2021-07-13 19:41:20,463 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1909534114] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:20,463 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1635472432] [2021-07-13 19:41:20,463 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 611 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 611 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:20,492 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-13 19:41:20,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:41:20,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 19:41:20,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:41:20,644 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:20,645 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:20,645 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:41:20,646 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:20,648 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:20,648 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:41:20,649 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:20,671 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-07-13 19:41:20,671 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:41:20,671 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:41:20,672 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-07-13 19:41:20,693 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:20,693 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1635472432] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:20,693 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:41:20,693 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 20 [2021-07-13 19:41:20,693 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850227505] [2021-07-13 19:41:20,694 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 19:41:20,694 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:41:20,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 19:41:20,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=330, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:41:20,694 INFO L87 Difference]: Start difference. First operand 2654 states and 7531 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:21,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:41:21,479 INFO L93 Difference]: Finished difference Result 2903 states and 8020 transitions. [2021-07-13 19:41:21,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-13 19:41:21,480 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:41:21,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:41:21,483 INFO L225 Difference]: With dead ends: 2903 [2021-07-13 19:41:21,483 INFO L226 Difference]: Without dead ends: 2897 [2021-07-13 19:41:21,484 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 366 ImplicationChecksByTransitivity, 660.8ms TimeCoverageRelationStatistics Valid=204, Invalid=1518, Unknown=0, NotChecked=0, Total=1722 [2021-07-13 19:41:21,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2897 states. [2021-07-13 19:41:21,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2897 to 2620. [2021-07-13 19:41:21,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2620 states, 2619 states have (on average 2.8270332187857963) internal successors, (7404), 2619 states have internal predecessors, (7404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:21,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2620 states to 2620 states and 7404 transitions. [2021-07-13 19:41:21,520 INFO L78 Accepts]: Start accepts. Automaton has 2620 states and 7404 transitions. Word has length 19 [2021-07-13 19:41:21,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:41:21,520 INFO L482 AbstractCegarLoop]: Abstraction has 2620 states and 7404 transitions. [2021-07-13 19:41:21,520 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:21,520 INFO L276 IsEmpty]: Start isEmpty. Operand 2620 states and 7404 transitions. [2021-07-13 19:41:21,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:41:21,523 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:41:21,523 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:41:21,723 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 611 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4516 [2021-07-13 19:41:21,723 INFO L430 AbstractCegarLoop]: === Iteration 621 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:41:21,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:41:21,723 INFO L82 PathProgramCache]: Analyzing trace with hash -843352578, now seen corresponding path program 607 times [2021-07-13 19:41:21,723 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:41:21,723 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347950126] [2021-07-13 19:41:21,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:41:21,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:41:21,812 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:21,812 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:41:21,812 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347950126] [2021-07-13 19:41:21,812 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1347950126] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:21,812 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2589643] [2021-07-13 19:41:21,812 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 612 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 612 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:21,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:41:21,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 19:41:21,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:41:22,005 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:41:22,006 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:22,008 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:41:22,009 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:22,011 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:22,012 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:22,012 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:41:22,013 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:22,015 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:22,015 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:22,015 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:41:22,016 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:22,018 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:41:22,019 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:22,021 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:41:22,022 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:22,051 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-07-13 19:41:22,051 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:41:22,052 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:41:22,052 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-07-13 19:41:22,080 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:22,080 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2589643] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:22,080 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:41:22,080 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 20 [2021-07-13 19:41:22,080 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784611655] [2021-07-13 19:41:22,080 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 19:41:22,080 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:41:22,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 19:41:22,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=330, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:41:22,081 INFO L87 Difference]: Start difference. First operand 2620 states and 7404 transitions. Second operand has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:22,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:41:22,723 INFO L93 Difference]: Finished difference Result 2760 states and 7697 transitions. [2021-07-13 19:41:22,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-13 19:41:22,724 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:41:22,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:41:22,727 INFO L225 Difference]: With dead ends: 2760 [2021-07-13 19:41:22,727 INFO L226 Difference]: Without dead ends: 2756 [2021-07-13 19:41:22,727 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 308 ImplicationChecksByTransitivity, 584.1ms TimeCoverageRelationStatistics Valid=157, Invalid=1325, Unknown=0, NotChecked=0, Total=1482 [2021-07-13 19:41:22,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2756 states. [2021-07-13 19:41:22,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2756 to 2620. [2021-07-13 19:41:22,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2620 states, 2619 states have (on average 2.8232149675448643) internal successors, (7394), 2619 states have internal predecessors, (7394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:22,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2620 states to 2620 states and 7394 transitions. [2021-07-13 19:41:22,755 INFO L78 Accepts]: Start accepts. Automaton has 2620 states and 7394 transitions. Word has length 19 [2021-07-13 19:41:22,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:41:22,755 INFO L482 AbstractCegarLoop]: Abstraction has 2620 states and 7394 transitions. [2021-07-13 19:41:22,755 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:22,755 INFO L276 IsEmpty]: Start isEmpty. Operand 2620 states and 7394 transitions. [2021-07-13 19:41:22,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:41:22,758 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:41:22,758 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:41:22,958 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 612 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4519 [2021-07-13 19:41:22,958 INFO L430 AbstractCegarLoop]: === Iteration 622 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:41:22,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:41:22,958 INFO L82 PathProgramCache]: Analyzing trace with hash 885694756, now seen corresponding path program 608 times [2021-07-13 19:41:22,959 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:41:22,959 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900115890] [2021-07-13 19:41:22,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:41:22,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:41:23,053 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:23,053 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:41:23,053 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900115890] [2021-07-13 19:41:23,053 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [900115890] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:23,053 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [672969149] [2021-07-13 19:41:23,054 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 613 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 613 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:23,080 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:41:23,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:41:23,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 19:41:23,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:41:23,201 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:23,202 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:23,202 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:41:23,202 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:23,205 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:23,205 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:23,205 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:41:23,206 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:23,208 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:23,208 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:23,208 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:41:23,209 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:23,211 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:23,211 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:41:23,212 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:23,244 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-07-13 19:41:23,244 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:41:23,245 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:41:23,245 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-07-13 19:41:23,310 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:23,310 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [672969149] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:23,310 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:41:23,310 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 20 [2021-07-13 19:41:23,310 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912865622] [2021-07-13 19:41:23,310 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 19:41:23,310 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:41:23,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 19:41:23,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:41:23,311 INFO L87 Difference]: Start difference. First operand 2620 states and 7394 transitions. Second operand has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:24,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:41:24,376 INFO L93 Difference]: Finished difference Result 2828 states and 7823 transitions. [2021-07-13 19:41:24,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-07-13 19:41:24,377 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:41:24,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:41:24,380 INFO L225 Difference]: With dead ends: 2828 [2021-07-13 19:41:24,380 INFO L226 Difference]: Without dead ends: 2824 [2021-07-13 19:41:24,381 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 578 ImplicationChecksByTransitivity, 877.6ms TimeCoverageRelationStatistics Valid=233, Invalid=2023, Unknown=0, NotChecked=0, Total=2256 [2021-07-13 19:41:24,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2824 states. [2021-07-13 19:41:24,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2824 to 2619. [2021-07-13 19:41:24,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2619 states, 2618 states have (on average 2.820855614973262) internal successors, (7385), 2618 states have internal predecessors, (7385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:24,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2619 states to 2619 states and 7385 transitions. [2021-07-13 19:41:24,410 INFO L78 Accepts]: Start accepts. Automaton has 2619 states and 7385 transitions. Word has length 19 [2021-07-13 19:41:24,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:41:24,410 INFO L482 AbstractCegarLoop]: Abstraction has 2619 states and 7385 transitions. [2021-07-13 19:41:24,411 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:24,411 INFO L276 IsEmpty]: Start isEmpty. Operand 2619 states and 7385 transitions. [2021-07-13 19:41:24,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:41:24,413 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:41:24,413 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:41:24,613 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4526,613 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:24,614 INFO L430 AbstractCegarLoop]: === Iteration 623 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:41:24,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:41:24,614 INFO L82 PathProgramCache]: Analyzing trace with hash -1690928834, now seen corresponding path program 609 times [2021-07-13 19:41:24,614 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:41:24,614 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505863686] [2021-07-13 19:41:24,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:41:24,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:41:24,709 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:24,709 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:41:24,709 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505863686] [2021-07-13 19:41:24,709 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [505863686] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:24,709 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1075973263] [2021-07-13 19:41:24,709 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 614 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 614 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:24,739 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 19:41:24,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:41:24,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 19:41:24,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:41:24,863 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:24,864 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:24,864 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:41:24,865 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:24,867 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:24,867 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:24,868 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:41:24,868 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:24,870 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:24,871 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:24,871 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:41:24,872 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:24,874 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:24,874 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:41:24,875 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:24,907 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-07-13 19:41:24,907 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:41:24,907 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:41:24,908 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-07-13 19:41:24,959 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:24,960 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1075973263] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:24,960 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:41:24,960 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 20 [2021-07-13 19:41:24,960 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230300287] [2021-07-13 19:41:24,960 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 19:41:24,960 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:41:24,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 19:41:24,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:41:24,960 INFO L87 Difference]: Start difference. First operand 2619 states and 7385 transitions. Second operand has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:25,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:41:25,632 INFO L93 Difference]: Finished difference Result 2804 states and 7789 transitions. [2021-07-13 19:41:25,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-13 19:41:25,633 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:41:25,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:41:25,636 INFO L225 Difference]: With dead ends: 2804 [2021-07-13 19:41:25,636 INFO L226 Difference]: Without dead ends: 2804 [2021-07-13 19:41:25,637 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 559.8ms TimeCoverageRelationStatistics Valid=149, Invalid=1111, Unknown=0, NotChecked=0, Total=1260 [2021-07-13 19:41:25,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2804 states. [2021-07-13 19:41:25,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2804 to 2612. [2021-07-13 19:41:25,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2612 states, 2611 states have (on average 2.8203753351206435) internal successors, (7364), 2611 states have internal predecessors, (7364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:25,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2612 states to 2612 states and 7364 transitions. [2021-07-13 19:41:25,667 INFO L78 Accepts]: Start accepts. Automaton has 2612 states and 7364 transitions. Word has length 19 [2021-07-13 19:41:25,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:41:25,667 INFO L482 AbstractCegarLoop]: Abstraction has 2612 states and 7364 transitions. [2021-07-13 19:41:25,667 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:25,667 INFO L276 IsEmpty]: Start isEmpty. Operand 2612 states and 7364 transitions. [2021-07-13 19:41:25,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:41:25,670 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:41:25,670 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:41:25,870 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4532,614 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:25,870 INFO L430 AbstractCegarLoop]: === Iteration 624 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:41:25,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:41:25,870 INFO L82 PathProgramCache]: Analyzing trace with hash 55341922, now seen corresponding path program 610 times [2021-07-13 19:41:25,870 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:41:25,870 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231954281] [2021-07-13 19:41:25,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:41:25,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:41:25,951 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:25,952 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:41:25,952 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231954281] [2021-07-13 19:41:25,952 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [231954281] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:25,952 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [125854120] [2021-07-13 19:41:25,952 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 615 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 615 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:25,979 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:41:25,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:41:25,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 19:41:25,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:41:26,119 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:26,120 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:26,120 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:41:26,121 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:26,123 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:26,123 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:41:26,124 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:26,145 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-07-13 19:41:26,145 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:41:26,146 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:41:26,146 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-07-13 19:41:26,177 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:26,178 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [125854120] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:26,178 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:41:26,178 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 20 [2021-07-13 19:41:26,178 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871895566] [2021-07-13 19:41:26,178 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 19:41:26,178 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:41:26,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 19:41:26,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=330, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:41:26,178 INFO L87 Difference]: Start difference. First operand 2612 states and 7364 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:26,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:41:26,760 INFO L93 Difference]: Finished difference Result 3001 states and 8223 transitions. [2021-07-13 19:41:26,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-13 19:41:26,760 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:41:26,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:41:26,764 INFO L225 Difference]: With dead ends: 3001 [2021-07-13 19:41:26,764 INFO L226 Difference]: Without dead ends: 3001 [2021-07-13 19:41:26,764 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 390.9ms TimeCoverageRelationStatistics Valid=133, Invalid=1127, Unknown=0, NotChecked=0, Total=1260 [2021-07-13 19:41:26,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3001 states. [2021-07-13 19:41:26,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3001 to 2649. [2021-07-13 19:41:26,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2649 states, 2648 states have (on average 2.828549848942598) internal successors, (7490), 2648 states have internal predecessors, (7490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:26,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2649 states to 2649 states and 7490 transitions. [2021-07-13 19:41:26,794 INFO L78 Accepts]: Start accepts. Automaton has 2649 states and 7490 transitions. Word has length 19 [2021-07-13 19:41:26,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:41:26,794 INFO L482 AbstractCegarLoop]: Abstraction has 2649 states and 7490 transitions. [2021-07-13 19:41:26,794 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:26,794 INFO L276 IsEmpty]: Start isEmpty. Operand 2649 states and 7490 transitions. [2021-07-13 19:41:26,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:41:26,796 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:41:26,796 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:41:26,997 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4536,615 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:26,997 INFO L430 AbstractCegarLoop]: === Iteration 625 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:41:26,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:41:26,997 INFO L82 PathProgramCache]: Analyzing trace with hash -864358786, now seen corresponding path program 611 times [2021-07-13 19:41:26,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:41:26,997 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075461247] [2021-07-13 19:41:26,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:41:27,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:41:27,081 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:27,081 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:41:27,081 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075461247] [2021-07-13 19:41:27,081 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2075461247] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:27,081 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [163931777] [2021-07-13 19:41:27,081 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 616 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 616 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:27,109 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:41:27,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:41:27,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 19:41:27,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:41:27,273 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:41:27,274 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:27,276 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:41:27,277 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:27,280 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:27,280 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:27,280 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:41:27,281 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:27,283 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:27,284 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:27,284 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:41:27,284 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:27,287 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:41:27,287 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:27,289 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:41:27,290 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:27,329 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-07-13 19:41:27,330 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:41:27,331 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:41:27,331 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-07-13 19:41:27,358 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:27,358 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [163931777] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:27,359 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:41:27,359 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 20 [2021-07-13 19:41:27,359 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842909568] [2021-07-13 19:41:27,359 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 19:41:27,359 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:41:27,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 19:41:27,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=330, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:41:27,359 INFO L87 Difference]: Start difference. First operand 2649 states and 7490 transitions. Second operand has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:28,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:41:28,061 INFO L93 Difference]: Finished difference Result 2821 states and 7828 transitions. [2021-07-13 19:41:28,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-07-13 19:41:28,061 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:41:28,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:41:28,065 INFO L225 Difference]: With dead ends: 2821 [2021-07-13 19:41:28,065 INFO L226 Difference]: Without dead ends: 2817 [2021-07-13 19:41:28,065 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 566.8ms TimeCoverageRelationStatistics Valid=155, Invalid=1405, Unknown=0, NotChecked=0, Total=1560 [2021-07-13 19:41:28,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2817 states. [2021-07-13 19:41:28,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2817 to 2649. [2021-07-13 19:41:28,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2649 states, 2648 states have (on average 2.823262839879154) internal successors, (7476), 2648 states have internal predecessors, (7476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:28,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2649 states to 2649 states and 7476 transitions. [2021-07-13 19:41:28,095 INFO L78 Accepts]: Start accepts. Automaton has 2649 states and 7476 transitions. Word has length 19 [2021-07-13 19:41:28,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:41:28,096 INFO L482 AbstractCegarLoop]: Abstraction has 2649 states and 7476 transitions. [2021-07-13 19:41:28,096 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:28,096 INFO L276 IsEmpty]: Start isEmpty. Operand 2649 states and 7476 transitions. [2021-07-13 19:41:28,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:41:28,098 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:41:28,098 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:41:28,299 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4539,616 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:28,299 INFO L430 AbstractCegarLoop]: === Iteration 626 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:41:28,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:41:28,299 INFO L82 PathProgramCache]: Analyzing trace with hash 63072320, now seen corresponding path program 612 times [2021-07-13 19:41:28,299 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:41:28,299 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249370331] [2021-07-13 19:41:28,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:41:28,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:41:28,387 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:28,387 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:41:28,387 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249370331] [2021-07-13 19:41:28,387 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [249370331] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:28,387 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [27549249] [2021-07-13 19:41:28,387 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 617 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 617 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:28,415 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-13 19:41:28,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:41:28,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 19:41:28,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:41:28,537 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:28,537 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:28,537 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:41:28,538 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:28,540 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:28,540 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:28,541 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:41:28,541 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:28,543 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:28,544 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:28,544 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:41:28,545 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:28,547 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:28,547 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:41:28,548 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:28,580 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-07-13 19:41:28,580 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:41:28,580 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:41:28,580 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-07-13 19:41:28,631 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:28,632 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [27549249] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:28,632 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:41:28,632 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 20 [2021-07-13 19:41:28,632 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936956793] [2021-07-13 19:41:28,632 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 19:41:28,632 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:41:28,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 19:41:28,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:41:28,632 INFO L87 Difference]: Start difference. First operand 2649 states and 7476 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:29,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:41:29,431 INFO L93 Difference]: Finished difference Result 2972 states and 8114 transitions. [2021-07-13 19:41:29,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-13 19:41:29,432 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:41:29,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:41:29,435 INFO L225 Difference]: With dead ends: 2972 [2021-07-13 19:41:29,435 INFO L226 Difference]: Without dead ends: 2970 [2021-07-13 19:41:29,436 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 335 ImplicationChecksByTransitivity, 589.3ms TimeCoverageRelationStatistics Valid=188, Invalid=1372, Unknown=0, NotChecked=0, Total=1560 [2021-07-13 19:41:29,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2970 states. [2021-07-13 19:41:29,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2970 to 2653. [2021-07-13 19:41:29,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2653 states, 2652 states have (on average 2.8220211161387634) internal successors, (7484), 2652 states have internal predecessors, (7484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:29,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2653 states to 2653 states and 7484 transitions. [2021-07-13 19:41:29,480 INFO L78 Accepts]: Start accepts. Automaton has 2653 states and 7484 transitions. Word has length 19 [2021-07-13 19:41:29,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:41:29,480 INFO L482 AbstractCegarLoop]: Abstraction has 2653 states and 7484 transitions. [2021-07-13 19:41:29,480 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:29,480 INFO L276 IsEmpty]: Start isEmpty. Operand 2653 states and 7484 transitions. [2021-07-13 19:41:29,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:41:29,483 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:41:29,483 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:41:29,683 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 617 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4546 [2021-07-13 19:41:29,683 INFO L430 AbstractCegarLoop]: === Iteration 627 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:41:29,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:41:29,684 INFO L82 PathProgramCache]: Analyzing trace with hash 864688548, now seen corresponding path program 613 times [2021-07-13 19:41:29,684 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:41:29,684 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172377950] [2021-07-13 19:41:29,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:41:29,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:41:29,773 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:29,773 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:41:29,773 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172377950] [2021-07-13 19:41:29,773 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [172377950] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:29,773 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [563420701] [2021-07-13 19:41:29,773 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 618 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 618 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:29,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:41:29,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 19:41:29,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:41:29,911 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:29,911 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:29,912 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:41:29,912 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:29,914 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:29,915 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:29,915 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:41:29,916 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:29,918 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:29,918 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:29,918 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:41:29,919 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:29,921 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:29,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:41:29,922 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:29,954 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-07-13 19:41:29,954 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:41:29,954 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:41:29,955 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-07-13 19:41:30,021 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:30,022 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [563420701] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:30,022 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:41:30,022 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 20 [2021-07-13 19:41:30,022 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70839764] [2021-07-13 19:41:30,022 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 19:41:30,022 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:41:30,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 19:41:30,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:41:30,022 INFO L87 Difference]: Start difference. First operand 2653 states and 7484 transitions. Second operand has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:31,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:41:31,216 INFO L93 Difference]: Finished difference Result 2938 states and 8058 transitions. [2021-07-13 19:41:31,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-07-13 19:41:31,216 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:41:31,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:41:31,220 INFO L225 Difference]: With dead ends: 2938 [2021-07-13 19:41:31,220 INFO L226 Difference]: Without dead ends: 2934 [2021-07-13 19:41:31,220 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 807 ImplicationChecksByTransitivity, 918.0ms TimeCoverageRelationStatistics Valid=268, Invalid=2594, Unknown=0, NotChecked=0, Total=2862 [2021-07-13 19:41:31,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2934 states. [2021-07-13 19:41:31,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2934 to 2668. [2021-07-13 19:41:31,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2668 states, 2667 states have (on average 2.8211473565804273) internal successors, (7524), 2667 states have internal predecessors, (7524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:31,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2668 states to 2668 states and 7524 transitions. [2021-07-13 19:41:31,252 INFO L78 Accepts]: Start accepts. Automaton has 2668 states and 7524 transitions. Word has length 19 [2021-07-13 19:41:31,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:41:31,252 INFO L482 AbstractCegarLoop]: Abstraction has 2668 states and 7524 transitions. [2021-07-13 19:41:31,252 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:31,252 INFO L276 IsEmpty]: Start isEmpty. Operand 2668 states and 7524 transitions. [2021-07-13 19:41:31,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:41:31,255 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:41:31,255 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:41:31,455 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 618 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4550 [2021-07-13 19:41:31,455 INFO L430 AbstractCegarLoop]: === Iteration 628 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:41:31,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:41:31,455 INFO L82 PathProgramCache]: Analyzing trace with hash -1711935042, now seen corresponding path program 614 times [2021-07-13 19:41:31,455 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:41:31,455 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023312842] [2021-07-13 19:41:31,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:41:31,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:41:31,546 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:31,546 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:41:31,546 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023312842] [2021-07-13 19:41:31,547 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1023312842] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:31,547 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1230578238] [2021-07-13 19:41:31,547 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 619 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 619 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:31,573 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:41:31,573 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:41:31,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 19:41:31,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:41:31,683 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:31,684 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:31,684 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:41:31,685 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:31,687 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:31,687 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:31,687 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:41:31,688 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:31,690 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:31,690 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:31,691 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:41:31,691 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:31,693 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:31,693 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:41:31,694 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:31,726 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-07-13 19:41:31,726 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:41:31,727 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:41:31,727 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-07-13 19:41:31,779 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:31,780 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1230578238] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:31,780 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:41:31,780 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 20 [2021-07-13 19:41:31,780 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413829067] [2021-07-13 19:41:31,780 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 19:41:31,780 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:41:31,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 19:41:31,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:41:31,780 INFO L87 Difference]: Start difference. First operand 2668 states and 7524 transitions. Second operand has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:32,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:41:32,547 INFO L93 Difference]: Finished difference Result 2921 states and 8032 transitions. [2021-07-13 19:41:32,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-13 19:41:32,547 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:41:32,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:41:32,551 INFO L225 Difference]: With dead ends: 2921 [2021-07-13 19:41:32,551 INFO L226 Difference]: Without dead ends: 2921 [2021-07-13 19:41:32,551 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 323 ImplicationChecksByTransitivity, 598.9ms TimeCoverageRelationStatistics Valid=174, Invalid=1308, Unknown=0, NotChecked=0, Total=1482 [2021-07-13 19:41:32,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2921 states. [2021-07-13 19:41:32,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2921 to 2647. [2021-07-13 19:41:32,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2647 states, 2646 states have (on average 2.814436885865457) internal successors, (7447), 2646 states have internal predecessors, (7447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:32,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2647 states to 2647 states and 7447 transitions. [2021-07-13 19:41:32,580 INFO L78 Accepts]: Start accepts. Automaton has 2647 states and 7447 transitions. Word has length 19 [2021-07-13 19:41:32,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:41:32,580 INFO L482 AbstractCegarLoop]: Abstraction has 2647 states and 7447 transitions. [2021-07-13 19:41:32,581 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:32,581 INFO L276 IsEmpty]: Start isEmpty. Operand 2647 states and 7447 transitions. [2021-07-13 19:41:32,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:41:32,583 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:41:32,583 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:41:32,783 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 619 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4556 [2021-07-13 19:41:32,784 INFO L430 AbstractCegarLoop]: === Iteration 629 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:41:32,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:41:32,784 INFO L82 PathProgramCache]: Analyzing trace with hash -353247296, now seen corresponding path program 615 times [2021-07-13 19:41:32,784 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:41:32,784 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654865714] [2021-07-13 19:41:32,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:41:32,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:41:32,907 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:32,907 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:41:32,907 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654865714] [2021-07-13 19:41:32,907 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1654865714] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:32,907 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1969652208] [2021-07-13 19:41:32,907 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 620 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 620 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:32,935 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-13 19:41:32,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:41:32,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 19:41:32,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:41:33,060 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:33,061 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:33,061 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:41:33,062 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:33,064 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:33,064 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:33,064 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:41:33,065 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:33,077 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:33,078 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:33,078 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:41:33,079 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:33,081 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:33,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:41:33,082 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:33,114 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-07-13 19:41:33,114 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:41:33,114 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:41:33,114 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-07-13 19:41:33,166 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:33,167 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1969652208] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:33,167 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:41:33,167 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-07-13 19:41:33,167 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10117726] [2021-07-13 19:41:33,167 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:41:33,167 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:41:33,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:41:33,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=366, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:41:33,167 INFO L87 Difference]: Start difference. First operand 2647 states and 7447 transitions. Second operand has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:34,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:41:34,119 INFO L93 Difference]: Finished difference Result 3078 states and 8406 transitions. [2021-07-13 19:41:34,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-07-13 19:41:34,119 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:41:34,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:41:34,123 INFO L225 Difference]: With dead ends: 3078 [2021-07-13 19:41:34,123 INFO L226 Difference]: Without dead ends: 3078 [2021-07-13 19:41:34,124 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 496 ImplicationChecksByTransitivity, 794.5ms TimeCoverageRelationStatistics Valid=244, Invalid=1826, Unknown=0, NotChecked=0, Total=2070 [2021-07-13 19:41:34,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3078 states. [2021-07-13 19:41:34,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3078 to 2715. [2021-07-13 19:41:34,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2715 states, 2714 states have (on average 2.8290346352247604) internal successors, (7678), 2714 states have internal predecessors, (7678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:34,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2715 states to 2715 states and 7678 transitions. [2021-07-13 19:41:34,162 INFO L78 Accepts]: Start accepts. Automaton has 2715 states and 7678 transitions. Word has length 19 [2021-07-13 19:41:34,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:41:34,162 INFO L482 AbstractCegarLoop]: Abstraction has 2715 states and 7678 transitions. [2021-07-13 19:41:34,162 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:34,163 INFO L276 IsEmpty]: Start isEmpty. Operand 2715 states and 7678 transitions. [2021-07-13 19:41:34,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:41:34,165 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:41:34,165 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:41:34,365 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4560,620 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:34,366 INFO L430 AbstractCegarLoop]: === Iteration 630 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:41:34,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:41:34,366 INFO L82 PathProgramCache]: Analyzing trace with hash 448368932, now seen corresponding path program 616 times [2021-07-13 19:41:34,366 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:41:34,366 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175407046] [2021-07-13 19:41:34,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:41:34,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:41:34,474 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:34,474 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:41:34,474 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175407046] [2021-07-13 19:41:34,474 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1175407046] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:34,474 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [547546714] [2021-07-13 19:41:34,474 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 621 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 621 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:34,501 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:41:34,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:41:34,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 19:41:34,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:41:34,627 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:34,627 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:34,628 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:41:34,628 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:34,630 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:34,631 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:34,631 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:41:34,632 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:34,634 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:34,634 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:34,634 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:41:34,635 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:34,637 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:34,637 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:41:34,638 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:34,670 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-07-13 19:41:34,670 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:41:34,671 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:41:34,671 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-07-13 19:41:34,737 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:34,737 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [547546714] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:34,737 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:41:34,737 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-07-13 19:41:34,737 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433940145] [2021-07-13 19:41:34,737 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:41:34,737 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:41:34,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:41:34,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:41:34,737 INFO L87 Difference]: Start difference. First operand 2715 states and 7678 transitions. Second operand has 21 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:35,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:41:35,896 INFO L93 Difference]: Finished difference Result 3065 states and 8424 transitions. [2021-07-13 19:41:35,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-07-13 19:41:35,896 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:41:35,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:41:35,900 INFO L225 Difference]: With dead ends: 3065 [2021-07-13 19:41:35,900 INFO L226 Difference]: Without dead ends: 3055 [2021-07-13 19:41:35,901 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1065 ImplicationChecksByTransitivity, 994.9ms TimeCoverageRelationStatistics Valid=301, Invalid=3239, Unknown=0, NotChecked=0, Total=3540 [2021-07-13 19:41:35,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3055 states. [2021-07-13 19:41:35,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3055 to 2750. [2021-07-13 19:41:35,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2750 states, 2749 states have (on average 2.8272098945070936) internal successors, (7772), 2749 states have internal predecessors, (7772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:35,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2750 states to 2750 states and 7772 transitions. [2021-07-13 19:41:35,934 INFO L78 Accepts]: Start accepts. Automaton has 2750 states and 7772 transitions. Word has length 19 [2021-07-13 19:41:35,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:41:35,934 INFO L482 AbstractCegarLoop]: Abstraction has 2750 states and 7772 transitions. [2021-07-13 19:41:35,934 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:35,934 INFO L276 IsEmpty]: Start isEmpty. Operand 2750 states and 7772 transitions. [2021-07-13 19:41:35,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:41:35,937 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:41:35,937 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:41:36,137 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4564,621 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:36,137 INFO L430 AbstractCegarLoop]: === Iteration 631 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:41:36,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:41:36,137 INFO L82 PathProgramCache]: Analyzing trace with hash -2128254658, now seen corresponding path program 617 times [2021-07-13 19:41:36,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:41:36,137 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157879191] [2021-07-13 19:41:36,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:41:36,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:41:36,244 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:36,244 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:41:36,244 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157879191] [2021-07-13 19:41:36,244 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [157879191] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:36,244 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1607322416] [2021-07-13 19:41:36,244 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 622 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 622 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:36,272 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-13 19:41:36,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:41:36,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 19:41:36,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:41:36,393 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:36,393 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:36,393 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:41:36,394 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:36,396 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:36,396 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:36,397 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:41:36,397 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:36,399 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:36,400 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:36,400 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:41:36,401 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:36,403 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:36,403 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:41:36,404 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:36,435 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-07-13 19:41:36,436 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:41:36,436 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:41:36,436 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-07-13 19:41:36,499 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:36,500 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1607322416] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:36,500 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:41:36,500 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-07-13 19:41:36,500 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126578997] [2021-07-13 19:41:36,500 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:41:36,500 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:41:36,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:41:36,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:41:36,500 INFO L87 Difference]: Start difference. First operand 2750 states and 7772 transitions. Second operand has 21 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:37,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:41:37,250 INFO L93 Difference]: Finished difference Result 3061 states and 8413 transitions. [2021-07-13 19:41:37,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-07-13 19:41:37,250 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:41:37,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:41:37,254 INFO L225 Difference]: With dead ends: 3061 [2021-07-13 19:41:37,254 INFO L226 Difference]: Without dead ends: 3061 [2021-07-13 19:41:37,254 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 393 ImplicationChecksByTransitivity, 519.1ms TimeCoverageRelationStatistics Valid=169, Invalid=1471, Unknown=0, NotChecked=0, Total=1640 [2021-07-13 19:41:37,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3061 states. [2021-07-13 19:41:37,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3061 to 2746. [2021-07-13 19:41:37,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2746 states, 2745 states have (on average 2.822950819672131) internal successors, (7749), 2745 states have internal predecessors, (7749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:37,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2746 states to 2746 states and 7749 transitions. [2021-07-13 19:41:37,286 INFO L78 Accepts]: Start accepts. Automaton has 2746 states and 7749 transitions. Word has length 19 [2021-07-13 19:41:37,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:41:37,287 INFO L482 AbstractCegarLoop]: Abstraction has 2746 states and 7749 transitions. [2021-07-13 19:41:37,287 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:37,287 INFO L276 IsEmpty]: Start isEmpty. Operand 2746 states and 7749 transitions. [2021-07-13 19:41:37,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:41:37,289 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:41:37,289 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:41:37,490 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4570,622 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:37,490 INFO L430 AbstractCegarLoop]: === Iteration 632 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:41:37,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:41:37,490 INFO L82 PathProgramCache]: Analyzing trace with hash 456099330, now seen corresponding path program 618 times [2021-07-13 19:41:37,490 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:41:37,490 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115663779] [2021-07-13 19:41:37,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:41:37,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:41:37,602 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:37,602 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:41:37,602 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115663779] [2021-07-13 19:41:37,602 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [115663779] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:37,602 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1690993131] [2021-07-13 19:41:37,602 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 623 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 623 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:37,631 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-13 19:41:37,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:41:37,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 19:41:37,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:41:37,780 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:37,780 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:37,781 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:41:37,781 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:37,783 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:37,783 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:41:37,784 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:37,801 INFO L628 ElimStorePlain]: treesize reduction 30, result has 33.3 percent of original size [2021-07-13 19:41:37,801 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:41:37,802 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:41:37,802 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:59, output treesize:15 [2021-07-13 19:41:37,826 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:37,826 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1690993131] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:37,826 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:41:37,826 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-07-13 19:41:37,826 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507128294] [2021-07-13 19:41:37,826 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:41:37,826 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:41:37,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:41:37,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=366, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:41:37,827 INFO L87 Difference]: Start difference. First operand 2746 states and 7749 transitions. Second operand has 21 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:38,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:41:38,808 INFO L93 Difference]: Finished difference Result 3129 states and 8541 transitions. [2021-07-13 19:41:38,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-07-13 19:41:38,809 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:41:38,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:41:38,812 INFO L225 Difference]: With dead ends: 3129 [2021-07-13 19:41:38,812 INFO L226 Difference]: Without dead ends: 3129 [2021-07-13 19:41:38,812 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 678 ImplicationChecksByTransitivity, 789.4ms TimeCoverageRelationStatistics Valid=252, Invalid=2298, Unknown=0, NotChecked=0, Total=2550 [2021-07-13 19:41:38,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3129 states. [2021-07-13 19:41:38,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3129 to 2739. [2021-07-13 19:41:38,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2739 states, 2738 states have (on average 2.8206720233747262) internal successors, (7723), 2738 states have internal predecessors, (7723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:38,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2739 states to 2739 states and 7723 transitions. [2021-07-13 19:41:38,844 INFO L78 Accepts]: Start accepts. Automaton has 2739 states and 7723 transitions. Word has length 19 [2021-07-13 19:41:38,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:41:38,844 INFO L482 AbstractCegarLoop]: Abstraction has 2739 states and 7723 transitions. [2021-07-13 19:41:38,844 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:38,845 INFO L276 IsEmpty]: Start isEmpty. Operand 2739 states and 7723 transitions. [2021-07-13 19:41:38,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:41:38,847 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:41:38,847 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:41:39,047 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 623 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4574 [2021-07-13 19:41:39,048 INFO L430 AbstractCegarLoop]: === Iteration 633 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:41:39,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:41:39,048 INFO L82 PathProgramCache]: Analyzing trace with hash -1033305666, now seen corresponding path program 619 times [2021-07-13 19:41:39,048 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:41:39,048 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611166095] [2021-07-13 19:41:39,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:41:39,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:41:39,145 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:39,145 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:41:39,145 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611166095] [2021-07-13 19:41:39,145 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [611166095] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:39,145 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1068692850] [2021-07-13 19:41:39,145 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 624 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 624 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:39,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:41:39,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 19:41:39,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:41:39,309 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:39,310 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:39,310 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:41:39,311 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:39,313 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:39,313 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:41:39,313 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:39,331 INFO L628 ElimStorePlain]: treesize reduction 30, result has 33.3 percent of original size [2021-07-13 19:41:39,331 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:41:39,331 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:41:39,331 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:59, output treesize:15 [2021-07-13 19:41:39,356 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:39,356 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1068692850] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:39,356 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:41:39,356 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-07-13 19:41:39,357 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256482089] [2021-07-13 19:41:39,357 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:41:39,357 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:41:39,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:41:39,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=367, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:41:39,357 INFO L87 Difference]: Start difference. First operand 2739 states and 7723 transitions. Second operand has 21 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:39,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:41:39,871 INFO L93 Difference]: Finished difference Result 3049 states and 8363 transitions. [2021-07-13 19:41:39,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-13 19:41:39,871 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:41:39,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:41:39,875 INFO L225 Difference]: With dead ends: 3049 [2021-07-13 19:41:39,875 INFO L226 Difference]: Without dead ends: 3049 [2021-07-13 19:41:39,875 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 351.6ms TimeCoverageRelationStatistics Valid=101, Invalid=955, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 19:41:39,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3049 states. [2021-07-13 19:41:39,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3049 to 2739. [2021-07-13 19:41:39,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2739 states, 2738 states have (on average 2.8206720233747262) internal successors, (7723), 2738 states have internal predecessors, (7723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:39,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2739 states to 2739 states and 7723 transitions. [2021-07-13 19:41:39,916 INFO L78 Accepts]: Start accepts. Automaton has 2739 states and 7723 transitions. Word has length 19 [2021-07-13 19:41:39,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:41:39,916 INFO L482 AbstractCegarLoop]: Abstraction has 2739 states and 7723 transitions. [2021-07-13 19:41:39,916 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:39,916 INFO L276 IsEmpty]: Start isEmpty. Operand 2739 states and 7723 transitions. [2021-07-13 19:41:39,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:41:39,919 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:41:39,919 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:41:40,119 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4576,624 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:40,119 INFO L430 AbstractCegarLoop]: === Iteration 634 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:41:40,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:41:40,120 INFO L82 PathProgramCache]: Analyzing trace with hash -1764477512, now seen corresponding path program 620 times [2021-07-13 19:41:40,120 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:41:40,120 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753068506] [2021-07-13 19:41:40,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:41:40,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:41:40,228 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:40,228 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:41:40,228 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753068506] [2021-07-13 19:41:40,228 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1753068506] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:40,228 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2134241146] [2021-07-13 19:41:40,228 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 625 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 625 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:40,255 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:41:40,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:41:40,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 19:41:40,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:41:40,442 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:40,442 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:40,442 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:41:40,443 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:40,445 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:40,445 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:41:40,446 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:40,468 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-07-13 19:41:40,468 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:41:40,468 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:41:40,468 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-07-13 19:41:40,491 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:40,491 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2134241146] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:40,491 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:41:40,491 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-07-13 19:41:40,491 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427006326] [2021-07-13 19:41:40,491 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 19:41:40,491 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:41:40,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 19:41:40,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=411, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:41:40,491 INFO L87 Difference]: Start difference. First operand 2739 states and 7723 transitions. Second operand has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:40,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:41:40,853 INFO L93 Difference]: Finished difference Result 2926 states and 8104 transitions. [2021-07-13 19:41:40,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 19:41:40,854 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:41:40,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:41:40,857 INFO L225 Difference]: With dead ends: 2926 [2021-07-13 19:41:40,857 INFO L226 Difference]: Without dead ends: 2926 [2021-07-13 19:41:40,858 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 254.8ms TimeCoverageRelationStatistics Valid=51, Invalid=411, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:41:40,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2926 states. [2021-07-13 19:41:40,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2926 to 2792. [2021-07-13 19:41:40,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2792 states, 2791 states have (on average 2.8244356861340023) internal successors, (7883), 2791 states have internal predecessors, (7883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:40,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2792 states to 2792 states and 7883 transitions. [2021-07-13 19:41:40,887 INFO L78 Accepts]: Start accepts. Automaton has 2792 states and 7883 transitions. Word has length 19 [2021-07-13 19:41:40,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:41:40,887 INFO L482 AbstractCegarLoop]: Abstraction has 2792 states and 7883 transitions. [2021-07-13 19:41:40,887 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:40,888 INFO L276 IsEmpty]: Start isEmpty. Operand 2792 states and 7883 transitions. [2021-07-13 19:41:40,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:41:40,890 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:41:40,890 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:41:41,090 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4578,625 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:41,091 INFO L430 AbstractCegarLoop]: === Iteration 635 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:41:41,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:41:41,091 INFO L82 PathProgramCache]: Analyzing trace with hash 1323078940, now seen corresponding path program 621 times [2021-07-13 19:41:41,091 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:41:41,091 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708672480] [2021-07-13 19:41:41,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:41:41,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:41:41,206 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:41,206 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:41:41,206 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708672480] [2021-07-13 19:41:41,206 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [708672480] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:41,206 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1253878144] [2021-07-13 19:41:41,206 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 626 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 626 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:41,234 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 19:41:41,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:41:41,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 19:41:41,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:41:41,455 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:41:41,456 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:41,458 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:41:41,459 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:41,461 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:41,461 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:41,461 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:41:41,462 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:41,465 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:41,465 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:41,465 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:41:41,466 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:41,468 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:41:41,469 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:41,471 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:41:41,477 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:41,508 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-07-13 19:41:41,508 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:41:41,509 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:41:41,509 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-07-13 19:41:41,539 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:41,539 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1253878144] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:41,539 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:41:41,539 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-07-13 19:41:41,539 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282811768] [2021-07-13 19:41:41,539 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 19:41:41,539 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:41:41,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 19:41:41,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=411, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:41:41,540 INFO L87 Difference]: Start difference. First operand 2792 states and 7883 transitions. Second operand has 22 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 22 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:42,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:41:42,141 INFO L93 Difference]: Finished difference Result 2902 states and 8039 transitions. [2021-07-13 19:41:42,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-13 19:41:42,141 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 22 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:41:42,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:41:42,145 INFO L225 Difference]: With dead ends: 2902 [2021-07-13 19:41:42,145 INFO L226 Difference]: Without dead ends: 2892 [2021-07-13 19:41:42,145 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 551.6ms TimeCoverageRelationStatistics Valid=120, Invalid=1212, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 19:41:42,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2892 states. [2021-07-13 19:41:42,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2892 to 2801. [2021-07-13 19:41:42,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2801 states, 2800 states have (on average 2.8192857142857144) internal successors, (7894), 2800 states have internal predecessors, (7894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:42,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2801 states to 2801 states and 7894 transitions. [2021-07-13 19:41:42,182 INFO L78 Accepts]: Start accepts. Automaton has 2801 states and 7894 transitions. Word has length 19 [2021-07-13 19:41:42,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:41:42,182 INFO L482 AbstractCegarLoop]: Abstraction has 2801 states and 7894 transitions. [2021-07-13 19:41:42,182 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 22 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:42,182 INFO L276 IsEmpty]: Start isEmpty. Operand 2801 states and 7894 transitions. [2021-07-13 19:41:42,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:41:42,185 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:41:42,185 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:41:42,385 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 626 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4581 [2021-07-13 19:41:42,385 INFO L430 AbstractCegarLoop]: === Iteration 636 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:41:42,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:41:42,386 INFO L82 PathProgramCache]: Analyzing trace with hash 898542618, now seen corresponding path program 622 times [2021-07-13 19:41:42,386 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:41:42,386 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973231226] [2021-07-13 19:41:42,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:41:42,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:41:42,487 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:42,488 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:41:42,488 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973231226] [2021-07-13 19:41:42,488 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [973231226] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:42,488 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [939421427] [2021-07-13 19:41:42,488 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 627 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 627 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:42,514 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:41:42,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:41:42,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 19:41:42,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:41:42,713 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:42,714 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:42,714 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:41:42,715 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:42,717 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:42,718 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:41:42,718 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:42,740 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-07-13 19:41:42,740 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:41:42,741 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:41:42,741 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-07-13 19:41:42,763 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:42,763 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [939421427] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:42,763 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:41:42,763 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-07-13 19:41:42,764 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026774957] [2021-07-13 19:41:42,764 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 19:41:42,764 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:41:42,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 19:41:42,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=410, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:41:42,764 INFO L87 Difference]: Start difference. First operand 2801 states and 7894 transitions. Second operand has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:44,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:41:44,547 INFO L93 Difference]: Finished difference Result 3107 states and 8437 transitions. [2021-07-13 19:41:44,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-07-13 19:41:44,547 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:41:44,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:41:44,551 INFO L225 Difference]: With dead ends: 3107 [2021-07-13 19:41:44,551 INFO L226 Difference]: Without dead ends: 3107 [2021-07-13 19:41:44,552 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1286 ImplicationChecksByTransitivity, 1472.8ms TimeCoverageRelationStatistics Valid=491, Invalid=4065, Unknown=0, NotChecked=0, Total=4556 [2021-07-13 19:41:44,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3107 states. [2021-07-13 19:41:44,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3107 to 2805. [2021-07-13 19:41:44,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2805 states, 2804 states have (on average 2.8223965763195435) internal successors, (7914), 2804 states have internal predecessors, (7914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:44,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2805 states to 2805 states and 7914 transitions. [2021-07-13 19:41:44,581 INFO L78 Accepts]: Start accepts. Automaton has 2805 states and 7914 transitions. Word has length 19 [2021-07-13 19:41:44,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:41:44,581 INFO L482 AbstractCegarLoop]: Abstraction has 2805 states and 7914 transitions. [2021-07-13 19:41:44,581 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:44,582 INFO L276 IsEmpty]: Start isEmpty. Operand 2805 states and 7914 transitions. [2021-07-13 19:41:44,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:41:44,584 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:41:44,584 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:41:44,784 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4588,627 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:44,785 INFO L430 AbstractCegarLoop]: === Iteration 637 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:41:44,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:41:44,785 INFO L82 PathProgramCache]: Analyzing trace with hash 1829425206, now seen corresponding path program 623 times [2021-07-13 19:41:44,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:41:44,785 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132811922] [2021-07-13 19:41:44,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:41:44,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:41:44,890 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:44,890 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:41:44,890 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132811922] [2021-07-13 19:41:44,890 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1132811922] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:44,890 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [320574987] [2021-07-13 19:41:44,890 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 628 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 628 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:44,920 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:41:44,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:41:44,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 19:41:44,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:41:45,133 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:41:45,134 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:45,136 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:41:45,137 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:45,140 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:45,140 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:45,140 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:41:45,141 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:45,143 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:45,144 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:45,144 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:41:45,144 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:45,147 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:41:45,147 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:45,149 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:41:45,150 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:45,179 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-07-13 19:41:45,179 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:41:45,180 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:41:45,180 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-07-13 19:41:45,210 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:45,210 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [320574987] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:45,210 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:41:45,210 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-07-13 19:41:45,210 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721247341] [2021-07-13 19:41:45,210 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 19:41:45,210 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:41:45,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 19:41:45,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=410, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:41:45,211 INFO L87 Difference]: Start difference. First operand 2805 states and 7914 transitions. Second operand has 22 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 22 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:46,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:41:46,036 INFO L93 Difference]: Finished difference Result 2926 states and 8083 transitions. [2021-07-13 19:41:46,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-07-13 19:41:46,036 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 22 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:41:46,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:41:46,040 INFO L225 Difference]: With dead ends: 2926 [2021-07-13 19:41:46,040 INFO L226 Difference]: Without dead ends: 2918 [2021-07-13 19:41:46,040 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 375 ImplicationChecksByTransitivity, 699.8ms TimeCoverageRelationStatistics Valid=173, Invalid=1633, Unknown=0, NotChecked=0, Total=1806 [2021-07-13 19:41:46,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2918 states. [2021-07-13 19:41:46,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2918 to 2810. [2021-07-13 19:41:46,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2810 states, 2809 states have (on average 2.819864720541118) internal successors, (7921), 2809 states have internal predecessors, (7921), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:46,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2810 states to 2810 states and 7921 transitions. [2021-07-13 19:41:46,070 INFO L78 Accepts]: Start accepts. Automaton has 2810 states and 7921 transitions. Word has length 19 [2021-07-13 19:41:46,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:41:46,070 INFO L482 AbstractCegarLoop]: Abstraction has 2810 states and 7921 transitions. [2021-07-13 19:41:46,070 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 22 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:46,070 INFO L276 IsEmpty]: Start isEmpty. Operand 2810 states and 7921 transitions. [2021-07-13 19:41:46,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:41:46,073 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:41:46,073 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:41:46,273 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 628 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4591 [2021-07-13 19:41:46,273 INFO L430 AbstractCegarLoop]: === Iteration 638 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:41:46,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:41:46,273 INFO L82 PathProgramCache]: Analyzing trace with hash -262479496, now seen corresponding path program 624 times [2021-07-13 19:41:46,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:41:46,273 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195973256] [2021-07-13 19:41:46,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:41:46,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:41:46,376 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:46,376 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:41:46,376 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195973256] [2021-07-13 19:41:46,376 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1195973256] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:46,376 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [850548528] [2021-07-13 19:41:46,376 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 629 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 629 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:46,404 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:41:46,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:41:46,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 19:41:46,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:41:46,595 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:46,596 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:46,596 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:41:46,597 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:46,599 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:46,599 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:41:46,600 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:46,621 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-07-13 19:41:46,622 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:41:46,622 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:41:46,622 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-07-13 19:41:46,644 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:46,645 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [850548528] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:46,645 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:41:46,645 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-07-13 19:41:46,645 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838416136] [2021-07-13 19:41:46,645 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 19:41:46,645 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:41:46,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 19:41:46,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=409, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:41:46,645 INFO L87 Difference]: Start difference. First operand 2810 states and 7921 transitions. Second operand has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:48,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:41:48,703 INFO L93 Difference]: Finished difference Result 3224 states and 8680 transitions. [2021-07-13 19:41:48,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-07-13 19:41:48,703 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:41:48,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:41:48,707 INFO L225 Difference]: With dead ends: 3224 [2021-07-13 19:41:48,707 INFO L226 Difference]: Without dead ends: 3224 [2021-07-13 19:41:48,707 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1669 ImplicationChecksByTransitivity, 1578.0ms TimeCoverageRelationStatistics Valid=505, Invalid=5045, Unknown=0, NotChecked=0, Total=5550 [2021-07-13 19:41:48,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3224 states. [2021-07-13 19:41:48,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3224 to 2814. [2021-07-13 19:41:48,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2814 states, 2813 states have (on average 2.826875222182723) internal successors, (7952), 2813 states have internal predecessors, (7952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:48,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2814 states to 2814 states and 7952 transitions. [2021-07-13 19:41:48,738 INFO L78 Accepts]: Start accepts. Automaton has 2814 states and 7952 transitions. Word has length 19 [2021-07-13 19:41:48,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:41:48,738 INFO L482 AbstractCegarLoop]: Abstraction has 2814 states and 7952 transitions. [2021-07-13 19:41:48,738 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:48,738 INFO L276 IsEmpty]: Start isEmpty. Operand 2814 states and 7952 transitions. [2021-07-13 19:41:48,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:41:48,741 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:41:48,741 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:41:48,941 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4598,629 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:48,941 INFO L430 AbstractCegarLoop]: === Iteration 639 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:41:48,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:41:48,941 INFO L82 PathProgramCache]: Analyzing trace with hash 1291569628, now seen corresponding path program 625 times [2021-07-13 19:41:48,942 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:41:48,942 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143891808] [2021-07-13 19:41:48,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:41:48,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:41:49,050 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:49,050 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:41:49,050 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143891808] [2021-07-13 19:41:49,050 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2143891808] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:49,050 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1401776064] [2021-07-13 19:41:49,050 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 630 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 630 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:49,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:41:49,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 19:41:49,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:41:49,305 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:41:49,306 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:49,308 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:41:49,309 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:49,311 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:49,312 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:49,312 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:41:49,313 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:49,315 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:49,315 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:49,316 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:41:49,316 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:49,318 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:41:49,319 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:49,321 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:41:49,322 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:49,352 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-07-13 19:41:49,352 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:41:49,353 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:41:49,353 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-07-13 19:41:49,383 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:49,383 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1401776064] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:49,383 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:41:49,383 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-07-13 19:41:49,383 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371140076] [2021-07-13 19:41:49,383 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 19:41:49,383 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:41:49,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 19:41:49,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=409, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:41:49,383 INFO L87 Difference]: Start difference. First operand 2814 states and 7952 transitions. Second operand has 22 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 22 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:50,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:41:50,164 INFO L93 Difference]: Finished difference Result 2914 states and 8100 transitions. [2021-07-13 19:41:50,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-13 19:41:50,165 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 22 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:41:50,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:41:50,169 INFO L225 Difference]: With dead ends: 2914 [2021-07-13 19:41:50,169 INFO L226 Difference]: Without dead ends: 2908 [2021-07-13 19:41:50,169 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 664.6ms TimeCoverageRelationStatistics Valid=156, Invalid=1404, Unknown=0, NotChecked=0, Total=1560 [2021-07-13 19:41:50,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2908 states. [2021-07-13 19:41:50,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2908 to 2816. [2021-07-13 19:41:50,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2816 states, 2815 states have (on average 2.8259325044404973) internal successors, (7955), 2815 states have internal predecessors, (7955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:50,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2816 states to 2816 states and 7955 transitions. [2021-07-13 19:41:50,200 INFO L78 Accepts]: Start accepts. Automaton has 2816 states and 7955 transitions. Word has length 19 [2021-07-13 19:41:50,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:41:50,200 INFO L482 AbstractCegarLoop]: Abstraction has 2816 states and 7955 transitions. [2021-07-13 19:41:50,200 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 22 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:50,200 INFO L276 IsEmpty]: Start isEmpty. Operand 2816 states and 7955 transitions. [2021-07-13 19:41:50,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:41:50,203 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:41:50,203 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:41:50,403 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4601,630 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:50,404 INFO L430 AbstractCegarLoop]: === Iteration 640 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:41:50,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:41:50,404 INFO L82 PathProgramCache]: Analyzing trace with hash -22837158, now seen corresponding path program 626 times [2021-07-13 19:41:50,404 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:41:50,404 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219465042] [2021-07-13 19:41:50,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:41:50,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:41:50,535 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:50,535 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:41:50,535 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219465042] [2021-07-13 19:41:50,535 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [219465042] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:50,535 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [229224135] [2021-07-13 19:41:50,535 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 631 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 631 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:50,563 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:41:50,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:41:50,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 19:41:50,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:41:50,761 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:50,761 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:50,761 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:41:50,762 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:50,764 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:50,765 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:41:50,765 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:50,787 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-07-13 19:41:50,787 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:41:50,788 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:41:50,788 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-07-13 19:41:50,810 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:50,811 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [229224135] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:50,811 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:41:50,811 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-07-13 19:41:50,811 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059544525] [2021-07-13 19:41:50,811 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 19:41:50,811 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:41:50,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 19:41:50,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=408, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:41:50,811 INFO L87 Difference]: Start difference. First operand 2816 states and 7955 transitions. Second operand has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:52,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:41:52,230 INFO L93 Difference]: Finished difference Result 3107 states and 8464 transitions. [2021-07-13 19:41:52,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-07-13 19:41:52,230 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:41:52,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:41:52,234 INFO L225 Difference]: With dead ends: 3107 [2021-07-13 19:41:52,234 INFO L226 Difference]: Without dead ends: 3107 [2021-07-13 19:41:52,235 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 581 ImplicationChecksByTransitivity, 977.7ms TimeCoverageRelationStatistics Valid=265, Invalid=2285, Unknown=0, NotChecked=0, Total=2550 [2021-07-13 19:41:52,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3107 states. [2021-07-13 19:41:52,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3107 to 2804. [2021-07-13 19:41:52,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2804 states, 2803 states have (on average 2.8273278630039242) internal successors, (7925), 2803 states have internal predecessors, (7925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:52,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2804 states to 2804 states and 7925 transitions. [2021-07-13 19:41:52,266 INFO L78 Accepts]: Start accepts. Automaton has 2804 states and 7925 transitions. Word has length 19 [2021-07-13 19:41:52,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:41:52,267 INFO L482 AbstractCegarLoop]: Abstraction has 2804 states and 7925 transitions. [2021-07-13 19:41:52,267 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:52,267 INFO L276 IsEmpty]: Start isEmpty. Operand 2804 states and 7925 transitions. [2021-07-13 19:41:52,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:41:52,269 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:41:52,269 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:41:52,470 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 631 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4608 [2021-07-13 19:41:52,470 INFO L430 AbstractCegarLoop]: === Iteration 641 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:41:52,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:41:52,470 INFO L82 PathProgramCache]: Analyzing trace with hash -942537866, now seen corresponding path program 627 times [2021-07-13 19:41:52,470 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:41:52,470 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658715221] [2021-07-13 19:41:52,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:41:52,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:41:52,581 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:52,581 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:41:52,581 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658715221] [2021-07-13 19:41:52,581 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [658715221] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:52,581 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [481651460] [2021-07-13 19:41:52,581 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 632 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 632 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:52,610 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:41:52,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:41:52,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 19:41:52,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:41:52,830 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:41:52,831 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:52,834 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:41:52,834 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:52,837 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:52,837 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:52,837 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:41:52,838 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:52,840 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:52,841 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:52,841 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:41:52,841 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:52,843 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:41:52,844 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:52,846 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:41:52,847 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:52,876 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-07-13 19:41:52,876 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:41:52,877 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:41:52,877 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-07-13 19:41:52,907 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:52,907 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [481651460] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:52,907 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:41:52,907 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-07-13 19:41:52,907 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840243459] [2021-07-13 19:41:52,907 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 19:41:52,907 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:41:52,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 19:41:52,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=408, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:41:52,907 INFO L87 Difference]: Start difference. First operand 2804 states and 7925 transitions. Second operand has 22 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 22 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:53,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:41:53,412 INFO L93 Difference]: Finished difference Result 2846 states and 8000 transitions. [2021-07-13 19:41:53,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-13 19:41:53,413 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 22 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:41:53,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:41:53,416 INFO L225 Difference]: With dead ends: 2846 [2021-07-13 19:41:53,416 INFO L226 Difference]: Without dead ends: 2841 [2021-07-13 19:41:53,416 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 501.5ms TimeCoverageRelationStatistics Valid=110, Invalid=882, Unknown=0, NotChecked=0, Total=992 [2021-07-13 19:41:53,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2841 states. [2021-07-13 19:41:53,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2841 to 2805. [2021-07-13 19:41:53,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2805 states, 2804 states have (on average 2.825962910128388) internal successors, (7924), 2804 states have internal predecessors, (7924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:53,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2805 states to 2805 states and 7924 transitions. [2021-07-13 19:41:53,445 INFO L78 Accepts]: Start accepts. Automaton has 2805 states and 7924 transitions. Word has length 19 [2021-07-13 19:41:53,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:41:53,446 INFO L482 AbstractCegarLoop]: Abstraction has 2805 states and 7924 transitions. [2021-07-13 19:41:53,446 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 22 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:53,446 INFO L276 IsEmpty]: Start isEmpty. Operand 2805 states and 7924 transitions. [2021-07-13 19:41:53,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:41:53,448 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:41:53,448 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:41:53,649 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4611,632 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:53,649 INFO L430 AbstractCegarLoop]: === Iteration 642 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:41:53,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:41:53,649 INFO L82 PathProgramCache]: Analyzing trace with hash -15106760, now seen corresponding path program 628 times [2021-07-13 19:41:53,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:41:53,649 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26443910] [2021-07-13 19:41:53,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:41:53,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:41:53,764 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:53,764 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:41:53,764 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26443910] [2021-07-13 19:41:53,764 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [26443910] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:53,764 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [187931742] [2021-07-13 19:41:53,764 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 633 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 633 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:53,791 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:41:53,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:41:53,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 19:41:53,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:41:53,975 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:53,976 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:53,976 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:41:53,977 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:53,983 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:53,983 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:53,984 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:41:53,985 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:53,987 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:53,987 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:53,988 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:41:53,988 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:53,990 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:53,991 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:41:53,991 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:54,026 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-07-13 19:41:54,027 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:41:54,027 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:41:54,027 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-07-13 19:41:54,084 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:54,084 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [187931742] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:54,084 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:41:54,084 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-07-13 19:41:54,084 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534091844] [2021-07-13 19:41:54,084 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 19:41:54,084 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:41:54,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 19:41:54,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=408, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:41:54,085 INFO L87 Difference]: Start difference. First operand 2805 states and 7924 transitions. Second operand has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:54,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:41:54,887 INFO L93 Difference]: Finished difference Result 3036 states and 8341 transitions. [2021-07-13 19:41:54,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-13 19:41:54,888 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:41:54,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:41:54,892 INFO L225 Difference]: With dead ends: 3036 [2021-07-13 19:41:54,892 INFO L226 Difference]: Without dead ends: 3036 [2021-07-13 19:41:54,892 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 676.3ms TimeCoverageRelationStatistics Valid=158, Invalid=1174, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 19:41:54,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3036 states. [2021-07-13 19:41:54,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3036 to 2794. [2021-07-13 19:41:54,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2794 states, 2793 states have (on average 2.8234872896527032) internal successors, (7886), 2793 states have internal predecessors, (7886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:54,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2794 states to 2794 states and 7886 transitions. [2021-07-13 19:41:54,930 INFO L78 Accepts]: Start accepts. Automaton has 2794 states and 7886 transitions. Word has length 19 [2021-07-13 19:41:54,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:41:54,931 INFO L482 AbstractCegarLoop]: Abstraction has 2794 states and 7886 transitions. [2021-07-13 19:41:54,931 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:54,931 INFO L276 IsEmpty]: Start isEmpty. Operand 2794 states and 7886 transitions. [2021-07-13 19:41:54,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:41:54,933 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:41:54,934 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:41:55,134 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 633 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4618 [2021-07-13 19:41:55,134 INFO L430 AbstractCegarLoop]: === Iteration 643 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:41:55,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:41:55,134 INFO L82 PathProgramCache]: Analyzing trace with hash 786509468, now seen corresponding path program 629 times [2021-07-13 19:41:55,134 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:41:55,135 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663839443] [2021-07-13 19:41:55,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:41:55,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:41:55,257 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:55,257 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:41:55,257 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663839443] [2021-07-13 19:41:55,257 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [663839443] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:55,258 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [846993616] [2021-07-13 19:41:55,258 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 634 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 634 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:55,287 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:41:55,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:41:55,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 19:41:55,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:41:55,447 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:55,448 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:55,448 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:41:55,448 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:55,451 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:55,451 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:55,451 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:41:55,452 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:55,454 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:55,454 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:55,454 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:41:55,455 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:55,457 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:55,457 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:41:55,458 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:55,490 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-07-13 19:41:55,491 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:41:55,491 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:41:55,491 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-07-13 19:41:55,560 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:55,560 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [846993616] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:55,560 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:41:55,560 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-07-13 19:41:55,560 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674983043] [2021-07-13 19:41:55,560 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 19:41:55,560 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:41:55,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 19:41:55,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=408, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:41:55,561 INFO L87 Difference]: Start difference. First operand 2794 states and 7886 transitions. Second operand has 22 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 22 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:56,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:41:56,409 INFO L93 Difference]: Finished difference Result 2976 states and 8218 transitions. [2021-07-13 19:41:56,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-07-13 19:41:56,409 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 22 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:41:56,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:41:56,413 INFO L225 Difference]: With dead ends: 2976 [2021-07-13 19:41:56,413 INFO L226 Difference]: Without dead ends: 2972 [2021-07-13 19:41:56,413 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 786.5ms TimeCoverageRelationStatistics Valid=186, Invalid=1620, Unknown=0, NotChecked=0, Total=1806 [2021-07-13 19:41:56,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2972 states. [2021-07-13 19:41:56,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2972 to 2812. [2021-07-13 19:41:56,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2812 states, 2811 states have (on average 2.8278192813945213) internal successors, (7949), 2811 states have internal predecessors, (7949), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:56,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2812 states to 2812 states and 7949 transitions. [2021-07-13 19:41:56,443 INFO L78 Accepts]: Start accepts. Automaton has 2812 states and 7949 transitions. Word has length 19 [2021-07-13 19:41:56,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:41:56,443 INFO L482 AbstractCegarLoop]: Abstraction has 2812 states and 7949 transitions. [2021-07-13 19:41:56,443 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 22 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:56,443 INFO L276 IsEmpty]: Start isEmpty. Operand 2812 states and 7949 transitions. [2021-07-13 19:41:56,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:41:56,446 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:41:56,446 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:41:56,646 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4622,634 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:56,646 INFO L430 AbstractCegarLoop]: === Iteration 644 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:41:56,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:41:56,647 INFO L82 PathProgramCache]: Analyzing trace with hash -1790114122, now seen corresponding path program 630 times [2021-07-13 19:41:56,647 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:41:56,647 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069896114] [2021-07-13 19:41:56,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:41:56,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:41:56,764 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:56,764 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:41:56,764 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069896114] [2021-07-13 19:41:56,765 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1069896114] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:56,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [139048029] [2021-07-13 19:41:56,765 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 635 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 635 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:56,793 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:41:56,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:41:56,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 19:41:56,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:41:56,956 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:56,956 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:56,957 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:41:56,957 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:56,959 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:56,960 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:56,960 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:41:56,961 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:56,963 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:56,963 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:56,963 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:41:56,964 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:56,966 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:56,966 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:41:56,967 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:56,999 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-07-13 19:41:56,999 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:41:57,000 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:41:57,000 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-07-13 19:41:57,056 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:57,057 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [139048029] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:57,057 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:41:57,057 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-07-13 19:41:57,057 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036177212] [2021-07-13 19:41:57,057 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 19:41:57,057 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:41:57,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 19:41:57,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=408, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:41:57,057 INFO L87 Difference]: Start difference. First operand 2812 states and 7949 transitions. Second operand has 22 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 22 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:57,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:41:57,582 INFO L93 Difference]: Finished difference Result 2951 states and 8180 transitions. [2021-07-13 19:41:57,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 19:41:57,582 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 22 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:41:57,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:41:57,586 INFO L225 Difference]: With dead ends: 2951 [2021-07-13 19:41:57,586 INFO L226 Difference]: Without dead ends: 2951 [2021-07-13 19:41:57,586 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 485.5ms TimeCoverageRelationStatistics Valid=99, Invalid=713, Unknown=0, NotChecked=0, Total=812 [2021-07-13 19:41:57,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2951 states. [2021-07-13 19:41:57,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2951 to 2796. [2021-07-13 19:41:57,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2796 states, 2795 states have (on average 2.8257602862254023) internal successors, (7898), 2795 states have internal predecessors, (7898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:57,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2796 states to 2796 states and 7898 transitions. [2021-07-13 19:41:57,619 INFO L78 Accepts]: Start accepts. Automaton has 2796 states and 7898 transitions. Word has length 19 [2021-07-13 19:41:57,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:41:57,619 INFO L482 AbstractCegarLoop]: Abstraction has 2796 states and 7898 transitions. [2021-07-13 19:41:57,619 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 22 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:57,619 INFO L276 IsEmpty]: Start isEmpty. Operand 2796 states and 7898 transitions. [2021-07-13 19:41:57,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:41:57,622 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:41:57,622 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:41:57,822 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4628,635 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:57,822 INFO L430 AbstractCegarLoop]: === Iteration 645 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:41:57,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:41:57,822 INFO L82 PathProgramCache]: Analyzing trace with hash 2035313566, now seen corresponding path program 631 times [2021-07-13 19:41:57,823 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:41:57,823 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497757705] [2021-07-13 19:41:57,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:41:57,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:41:57,923 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:41:57,924 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:41:57,924 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497757705] [2021-07-13 19:41:57,924 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1497757705] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:57,924 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [205641581] [2021-07-13 19:41:57,924 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 636 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 636 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:57,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:41:57,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 19:41:57,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:41:58,100 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:58,100 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:58,100 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:41:58,101 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:58,103 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:58,103 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:58,104 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:41:58,104 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:58,106 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:58,107 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:58,107 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:41:58,108 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:58,110 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:58,110 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:41:58,111 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:58,143 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-07-13 19:41:58,143 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:41:58,143 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:41:58,144 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-07-13 19:41:58,216 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:58,217 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [205641581] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:58,217 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:41:58,217 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 21 [2021-07-13 19:41:58,217 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564235228] [2021-07-13 19:41:58,217 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:41:58,217 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:41:58,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:41:58,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=368, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:41:58,217 INFO L87 Difference]: Start difference. First operand 2796 states and 7898 transitions. Second operand has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:59,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:41:59,027 INFO L93 Difference]: Finished difference Result 2925 states and 8183 transitions. [2021-07-13 19:41:59,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-13 19:41:59,027 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:41:59,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:41:59,032 INFO L225 Difference]: With dead ends: 2925 [2021-07-13 19:41:59,032 INFO L226 Difference]: Without dead ends: 2921 [2021-07-13 19:41:59,032 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 308 ImplicationChecksByTransitivity, 740.5ms TimeCoverageRelationStatistics Valid=171, Invalid=1389, Unknown=0, NotChecked=0, Total=1560 [2021-07-13 19:41:59,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2921 states. [2021-07-13 19:41:59,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2921 to 2802. [2021-07-13 19:41:59,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2802 states, 2801 states have (on average 2.826490539093181) internal successors, (7917), 2801 states have internal predecessors, (7917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:59,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2802 states to 2802 states and 7917 transitions. [2021-07-13 19:41:59,063 INFO L78 Accepts]: Start accepts. Automaton has 2802 states and 7917 transitions. Word has length 19 [2021-07-13 19:41:59,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:41:59,063 INFO L482 AbstractCegarLoop]: Abstraction has 2802 states and 7917 transitions. [2021-07-13 19:41:59,063 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:59,063 INFO L276 IsEmpty]: Start isEmpty. Operand 2802 states and 7917 transitions. [2021-07-13 19:41:59,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:41:59,066 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:41:59,066 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:41:59,266 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4632,636 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:59,267 INFO L430 AbstractCegarLoop]: === Iteration 646 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:41:59,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:41:59,267 INFO L82 PathProgramCache]: Analyzing trace with hash -1684242850, now seen corresponding path program 632 times [2021-07-13 19:41:59,267 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:41:59,267 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532672501] [2021-07-13 19:41:59,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:41:59,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:41:59,356 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:59,356 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:41:59,356 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532672501] [2021-07-13 19:41:59,356 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [532672501] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:59,356 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [313857331] [2021-07-13 19:41:59,356 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 637 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 637 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:59,383 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:41:59,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:41:59,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 19:41:59,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:41:59,559 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:59,559 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:59,559 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:41:59,560 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:59,562 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:59,563 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:41:59,563 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:59,586 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-07-13 19:41:59,586 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:41:59,586 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:41:59,587 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-07-13 19:41:59,608 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:59,609 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [313857331] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:59,609 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:41:59,609 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 21 [2021-07-13 19:41:59,609 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448142789] [2021-07-13 19:41:59,609 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:41:59,609 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:41:59,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:41:59,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=370, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:41:59,609 INFO L87 Difference]: Start difference. First operand 2802 states and 7917 transitions. Second operand has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:00,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:42:00,084 INFO L93 Difference]: Finished difference Result 3062 states and 8466 transitions. [2021-07-13 19:42:00,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 19:42:00,084 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:42:00,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:42:00,088 INFO L225 Difference]: With dead ends: 3062 [2021-07-13 19:42:00,088 INFO L226 Difference]: Without dead ends: 3062 [2021-07-13 19:42:00,088 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 234.4ms TimeCoverageRelationStatistics Valid=54, Invalid=408, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:42:00,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3062 states. [2021-07-13 19:42:00,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3062 to 2839. [2021-07-13 19:42:00,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2839 states, 2838 states have (on average 2.831923890063425) internal successors, (8037), 2838 states have internal predecessors, (8037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:00,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2839 states to 2839 states and 8037 transitions. [2021-07-13 19:42:00,121 INFO L78 Accepts]: Start accepts. Automaton has 2839 states and 8037 transitions. Word has length 19 [2021-07-13 19:42:00,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:42:00,121 INFO L482 AbstractCegarLoop]: Abstraction has 2839 states and 8037 transitions. [2021-07-13 19:42:00,121 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:00,121 INFO L276 IsEmpty]: Start isEmpty. Operand 2839 states and 8037 transitions. [2021-07-13 19:42:00,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:42:00,124 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:42:00,124 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:42:00,324 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4637,637 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:42:00,324 INFO L430 AbstractCegarLoop]: === Iteration 647 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:42:00,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:42:00,324 INFO L82 PathProgramCache]: Analyzing trace with hash -753360262, now seen corresponding path program 633 times [2021-07-13 19:42:00,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:42:00,325 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502983237] [2021-07-13 19:42:00,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:42:00,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:42:00,427 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:00,427 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:42:00,427 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502983237] [2021-07-13 19:42:00,428 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [502983237] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:00,428 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1835872822] [2021-07-13 19:42:00,428 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 638 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 638 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:42:00,459 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:42:00,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:42:00,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 19:42:00,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:42:00,665 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:42:00,666 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:00,668 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:42:00,669 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:00,671 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:00,671 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:00,672 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:42:00,673 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:00,675 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:00,675 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:00,675 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:42:00,676 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:00,678 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:42:00,679 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:00,681 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:42:00,682 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:00,711 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-07-13 19:42:00,711 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:42:00,712 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:42:00,712 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-07-13 19:42:00,740 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:00,741 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1835872822] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:00,741 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:42:00,741 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 21 [2021-07-13 19:42:00,741 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283485448] [2021-07-13 19:42:00,741 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:42:00,741 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:42:00,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:42:00,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=370, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:42:00,741 INFO L87 Difference]: Start difference. First operand 2839 states and 8037 transitions. Second operand has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:01,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:42:01,350 INFO L93 Difference]: Finished difference Result 2942 states and 8191 transitions. [2021-07-13 19:42:01,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-13 19:42:01,351 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:42:01,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:42:01,355 INFO L225 Difference]: With dead ends: 2942 [2021-07-13 19:42:01,355 INFO L226 Difference]: Without dead ends: 2934 [2021-07-13 19:42:01,355 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 516.9ms TimeCoverageRelationStatistics Valid=120, Invalid=1140, Unknown=0, NotChecked=0, Total=1260 [2021-07-13 19:42:01,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2934 states. [2021-07-13 19:42:01,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2934 to 2844. [2021-07-13 19:42:01,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2844 states, 2843 states have (on average 2.8287020752725995) internal successors, (8042), 2843 states have internal predecessors, (8042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:01,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2844 states to 2844 states and 8042 transitions. [2021-07-13 19:42:01,387 INFO L78 Accepts]: Start accepts. Automaton has 2844 states and 8042 transitions. Word has length 19 [2021-07-13 19:42:01,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:42:01,387 INFO L482 AbstractCegarLoop]: Abstraction has 2844 states and 8042 transitions. [2021-07-13 19:42:01,387 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:01,387 INFO L276 IsEmpty]: Start isEmpty. Operand 2844 states and 8042 transitions. [2021-07-13 19:42:01,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:42:01,390 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:42:01,390 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:42:01,590 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 638 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4640 [2021-07-13 19:42:01,590 INFO L430 AbstractCegarLoop]: === Iteration 648 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:42:01,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:42:01,591 INFO L82 PathProgramCache]: Analyzing trace with hash 1449702332, now seen corresponding path program 634 times [2021-07-13 19:42:01,591 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:42:01,591 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104972004] [2021-07-13 19:42:01,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:42:01,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:42:01,684 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:01,684 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:42:01,684 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104972004] [2021-07-13 19:42:01,684 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2104972004] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:01,684 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1414808473] [2021-07-13 19:42:01,684 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 639 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 639 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:42:01,712 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:42:01,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:42:01,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 19:42:01,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:42:01,887 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:01,888 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:01,888 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:42:01,889 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:01,891 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:01,891 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:42:01,892 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:01,914 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-07-13 19:42:01,914 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:42:01,914 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:42:01,915 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-07-13 19:42:01,936 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:01,936 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1414808473] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:01,936 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:42:01,936 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 21 [2021-07-13 19:42:01,936 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010266778] [2021-07-13 19:42:01,937 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:42:01,937 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:42:01,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:42:01,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:42:01,937 INFO L87 Difference]: Start difference. First operand 2844 states and 8042 transitions. Second operand has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:03,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:42:03,007 INFO L93 Difference]: Finished difference Result 3189 states and 8726 transitions. [2021-07-13 19:42:03,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-07-13 19:42:03,007 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:42:03,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:42:03,011 INFO L225 Difference]: With dead ends: 3189 [2021-07-13 19:42:03,012 INFO L226 Difference]: Without dead ends: 3189 [2021-07-13 19:42:03,012 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 527 ImplicationChecksByTransitivity, 895.7ms TimeCoverageRelationStatistics Valid=256, Invalid=2000, Unknown=0, NotChecked=0, Total=2256 [2021-07-13 19:42:03,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3189 states. [2021-07-13 19:42:03,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3189 to 2847. [2021-07-13 19:42:03,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2847 states, 2846 states have (on average 2.8292340126493323) internal successors, (8052), 2846 states have internal predecessors, (8052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:03,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2847 states to 2847 states and 8052 transitions. [2021-07-13 19:42:03,045 INFO L78 Accepts]: Start accepts. Automaton has 2847 states and 8052 transitions. Word has length 19 [2021-07-13 19:42:03,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:42:03,045 INFO L482 AbstractCegarLoop]: Abstraction has 2847 states and 8052 transitions. [2021-07-13 19:42:03,045 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:03,045 INFO L276 IsEmpty]: Start isEmpty. Operand 2847 states and 8052 transitions. [2021-07-13 19:42:03,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:42:03,048 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:42:03,048 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:42:03,248 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4647,639 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:42:03,248 INFO L430 AbstractCegarLoop]: === Iteration 649 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:42:03,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:42:03,249 INFO L82 PathProgramCache]: Analyzing trace with hash -1291215840, now seen corresponding path program 635 times [2021-07-13 19:42:03,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:42:03,249 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102780038] [2021-07-13 19:42:03,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:42:03,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:42:03,389 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:03,389 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:42:03,389 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102780038] [2021-07-13 19:42:03,390 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2102780038] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:03,390 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1417413730] [2021-07-13 19:42:03,390 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 640 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 640 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:42:03,421 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:42:03,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:42:03,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 19:42:03,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:42:03,623 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:42:03,624 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:03,626 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:42:03,627 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:03,629 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:03,630 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:03,630 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:42:03,631 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:03,633 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:03,633 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:03,634 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:42:03,634 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:03,636 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:42:03,637 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:03,639 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:42:03,640 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:03,669 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-07-13 19:42:03,669 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:42:03,670 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:42:03,670 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-07-13 19:42:03,698 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:03,699 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1417413730] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:03,699 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:42:03,699 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 21 [2021-07-13 19:42:03,699 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302484986] [2021-07-13 19:42:03,699 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:42:03,699 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:42:03,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:42:03,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:42:03,699 INFO L87 Difference]: Start difference. First operand 2847 states and 8052 transitions. Second operand has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:04,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:42:04,416 INFO L93 Difference]: Finished difference Result 2960 states and 8221 transitions. [2021-07-13 19:42:04,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-13 19:42:04,416 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:42:04,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:42:04,419 INFO L225 Difference]: With dead ends: 2960 [2021-07-13 19:42:04,419 INFO L226 Difference]: Without dead ends: 2951 [2021-07-13 19:42:04,419 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 653.5ms TimeCoverageRelationStatistics Valid=160, Invalid=1400, Unknown=0, NotChecked=0, Total=1560 [2021-07-13 19:42:04,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2951 states. [2021-07-13 19:42:04,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2951 to 2850. [2021-07-13 19:42:04,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2850 states, 2849 states have (on average 2.8273078273078274) internal successors, (8055), 2849 states have internal predecessors, (8055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:04,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2850 states to 2850 states and 8055 transitions. [2021-07-13 19:42:04,450 INFO L78 Accepts]: Start accepts. Automaton has 2850 states and 8055 transitions. Word has length 19 [2021-07-13 19:42:04,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:42:04,450 INFO L482 AbstractCegarLoop]: Abstraction has 2850 states and 8055 transitions. [2021-07-13 19:42:04,450 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:04,450 INFO L276 IsEmpty]: Start isEmpty. Operand 2850 states and 8055 transitions. [2021-07-13 19:42:04,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:42:04,453 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:42:04,453 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:42:04,653 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 640 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4650 [2021-07-13 19:42:04,654 INFO L430 AbstractCegarLoop]: === Iteration 650 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:42:04,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:42:04,654 INFO L82 PathProgramCache]: Analyzing trace with hash 1689344670, now seen corresponding path program 636 times [2021-07-13 19:42:04,654 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:42:04,654 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143428497] [2021-07-13 19:42:04,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:42:04,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:42:04,741 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:04,741 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:42:04,741 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143428497] [2021-07-13 19:42:04,742 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1143428497] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:04,742 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1177291616] [2021-07-13 19:42:04,742 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 641 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 641 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:42:04,769 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:42:04,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:42:04,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 19:42:04,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:42:04,946 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:04,947 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:04,947 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:42:04,948 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:04,950 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:04,950 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:42:04,951 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:04,973 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-07-13 19:42:04,973 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:42:04,973 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:42:04,974 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-07-13 19:42:04,995 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:04,995 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1177291616] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:04,995 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:42:04,995 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 21 [2021-07-13 19:42:04,995 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720937532] [2021-07-13 19:42:04,995 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:42:04,995 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:42:04,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:42:04,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=368, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:42:04,995 INFO L87 Difference]: Start difference. First operand 2850 states and 8055 transitions. Second operand has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:06,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:42:06,019 INFO L93 Difference]: Finished difference Result 3228 states and 8883 transitions. [2021-07-13 19:42:06,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-07-13 19:42:06,020 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:42:06,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:42:06,024 INFO L225 Difference]: With dead ends: 3228 [2021-07-13 19:42:06,024 INFO L226 Difference]: Without dead ends: 3228 [2021-07-13 19:42:06,024 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 439 ImplicationChecksByTransitivity, 738.2ms TimeCoverageRelationStatistics Valid=213, Invalid=1767, Unknown=0, NotChecked=0, Total=1980 [2021-07-13 19:42:06,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3228 states. [2021-07-13 19:42:06,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3228 to 2877. [2021-07-13 19:42:06,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2877 states, 2876 states have (on average 2.8355354659248957) internal successors, (8155), 2876 states have internal predecessors, (8155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:06,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2877 states to 2877 states and 8155 transitions. [2021-07-13 19:42:06,057 INFO L78 Accepts]: Start accepts. Automaton has 2877 states and 8155 transitions. Word has length 19 [2021-07-13 19:42:06,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:42:06,057 INFO L482 AbstractCegarLoop]: Abstraction has 2877 states and 8155 transitions. [2021-07-13 19:42:06,057 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:06,057 INFO L276 IsEmpty]: Start isEmpty. Operand 2877 states and 8155 transitions. [2021-07-13 19:42:06,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:42:06,060 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:42:06,060 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:42:06,260 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 641 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4657 [2021-07-13 19:42:06,260 INFO L430 AbstractCegarLoop]: === Iteration 651 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:42:06,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:42:06,261 INFO L82 PathProgramCache]: Analyzing trace with hash 769643962, now seen corresponding path program 637 times [2021-07-13 19:42:06,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:42:06,261 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725732146] [2021-07-13 19:42:06,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:42:06,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:42:06,354 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:06,354 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:42:06,354 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725732146] [2021-07-13 19:42:06,354 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725732146] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:06,354 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [275712177] [2021-07-13 19:42:06,354 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 642 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 642 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:42:06,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:42:06,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 19:42:06,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:42:06,570 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:42:06,571 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:06,574 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:42:06,574 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:06,577 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:06,577 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:06,578 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:42:06,579 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:06,581 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:06,581 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:06,581 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:42:06,582 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:06,584 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:42:06,585 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:06,587 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:42:06,588 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:06,618 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-07-13 19:42:06,619 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:42:06,620 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:42:06,620 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-07-13 19:42:06,652 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:06,652 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [275712177] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:06,652 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:42:06,652 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 21 [2021-07-13 19:42:06,652 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044266862] [2021-07-13 19:42:06,652 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:42:06,652 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:42:06,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:42:06,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=368, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:42:06,653 INFO L87 Difference]: Start difference. First operand 2877 states and 8155 transitions. Second operand has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:07,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:42:07,395 INFO L93 Difference]: Finished difference Result 2965 states and 8295 transitions. [2021-07-13 19:42:07,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-13 19:42:07,395 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:42:07,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:42:07,399 INFO L225 Difference]: With dead ends: 2965 [2021-07-13 19:42:07,399 INFO L226 Difference]: Without dead ends: 2959 [2021-07-13 19:42:07,399 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 278 ImplicationChecksByTransitivity, 637.4ms TimeCoverageRelationStatistics Valid=150, Invalid=1256, Unknown=0, NotChecked=0, Total=1406 [2021-07-13 19:42:07,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2959 states. [2021-07-13 19:42:07,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2959 to 2879. [2021-07-13 19:42:07,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2879 states, 2878 states have (on average 2.8342599027102153) internal successors, (8157), 2878 states have internal predecessors, (8157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:07,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2879 states to 2879 states and 8157 transitions. [2021-07-13 19:42:07,431 INFO L78 Accepts]: Start accepts. Automaton has 2879 states and 8157 transitions. Word has length 19 [2021-07-13 19:42:07,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:42:07,431 INFO L482 AbstractCegarLoop]: Abstraction has 2879 states and 8157 transitions. [2021-07-13 19:42:07,431 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:07,431 INFO L276 IsEmpty]: Start isEmpty. Operand 2879 states and 8157 transitions. [2021-07-13 19:42:07,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:42:07,434 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:42:07,434 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:42:07,636 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 642 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4660 [2021-07-13 19:42:07,637 INFO L430 AbstractCegarLoop]: === Iteration 652 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:42:07,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:42:07,637 INFO L82 PathProgramCache]: Analyzing trace with hash 1697075068, now seen corresponding path program 638 times [2021-07-13 19:42:07,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:42:07,637 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604545930] [2021-07-13 19:42:07,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:42:07,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:42:07,736 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:07,736 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:42:07,736 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604545930] [2021-07-13 19:42:07,736 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1604545930] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:07,737 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [750639818] [2021-07-13 19:42:07,737 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 643 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 643 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:42:07,764 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:42:07,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:42:07,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 19:42:07,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:42:07,908 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:07,908 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:07,908 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:42:07,909 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:07,923 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:07,923 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:07,924 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:42:07,924 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:07,926 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:07,927 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:07,927 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:42:07,927 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:07,929 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:07,930 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:42:07,931 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:07,962 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-07-13 19:42:07,962 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:42:07,963 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:42:07,963 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-07-13 19:42:08,017 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:08,017 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [750639818] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:08,017 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:42:08,017 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 21 [2021-07-13 19:42:08,017 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78624687] [2021-07-13 19:42:08,018 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:42:08,018 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:42:08,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:42:08,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=367, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:42:08,018 INFO L87 Difference]: Start difference. First operand 2879 states and 8157 transitions. Second operand has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:08,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:42:08,884 INFO L93 Difference]: Finished difference Result 3161 states and 8677 transitions. [2021-07-13 19:42:08,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-13 19:42:08,884 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:42:08,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:42:08,889 INFO L225 Difference]: With dead ends: 3161 [2021-07-13 19:42:08,889 INFO L226 Difference]: Without dead ends: 3157 [2021-07-13 19:42:08,889 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 344 ImplicationChecksByTransitivity, 729.8ms TimeCoverageRelationStatistics Valid=204, Invalid=1436, Unknown=0, NotChecked=0, Total=1640 [2021-07-13 19:42:08,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3157 states. [2021-07-13 19:42:08,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3157 to 2829. [2021-07-13 19:42:08,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2829 states, 2828 states have (on average 2.8246110325318248) internal successors, (7988), 2828 states have internal predecessors, (7988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:08,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2829 states to 2829 states and 7988 transitions. [2021-07-13 19:42:08,933 INFO L78 Accepts]: Start accepts. Automaton has 2829 states and 7988 transitions. Word has length 19 [2021-07-13 19:42:08,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:42:08,933 INFO L482 AbstractCegarLoop]: Abstraction has 2829 states and 7988 transitions. [2021-07-13 19:42:08,933 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:08,933 INFO L276 IsEmpty]: Start isEmpty. Operand 2829 states and 7988 transitions. [2021-07-13 19:42:08,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:42:08,936 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:42:08,936 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:42:09,136 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 643 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4667 [2021-07-13 19:42:09,137 INFO L430 AbstractCegarLoop]: === Iteration 653 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:42:09,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:42:09,137 INFO L82 PathProgramCache]: Analyzing trace with hash -1796276000, now seen corresponding path program 639 times [2021-07-13 19:42:09,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:42:09,137 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396739504] [2021-07-13 19:42:09,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:42:09,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:42:09,235 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:09,235 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:42:09,235 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396739504] [2021-07-13 19:42:09,235 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [396739504] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:09,235 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1384393635] [2021-07-13 19:42:09,235 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 644 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 644 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:42:09,263 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 19:42:09,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:42:09,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 28 conjunts are in the unsatisfiable core [2021-07-13 19:42:09,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:42:09,406 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:09,407 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:09,407 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:42:09,408 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:09,410 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:09,410 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:09,411 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:42:09,411 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:09,413 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:09,414 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:09,414 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:42:09,415 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:09,416 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:09,417 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:42:09,418 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:09,449 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-07-13 19:42:09,449 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:42:09,450 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:42:09,450 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-07-13 19:42:09,516 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:09,517 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1384393635] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:09,517 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:42:09,517 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 21 [2021-07-13 19:42:09,517 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074755730] [2021-07-13 19:42:09,517 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:42:09,517 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:42:09,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:42:09,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=367, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:42:09,517 INFO L87 Difference]: Start difference. First operand 2829 states and 7988 transitions. Second operand has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:10,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:42:10,375 INFO L93 Difference]: Finished difference Result 2956 states and 8222 transitions. [2021-07-13 19:42:10,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-13 19:42:10,375 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:42:10,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:42:10,379 INFO L225 Difference]: With dead ends: 2956 [2021-07-13 19:42:10,379 INFO L226 Difference]: Without dead ends: 2951 [2021-07-13 19:42:10,379 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 357 ImplicationChecksByTransitivity, 742.5ms TimeCoverageRelationStatistics Valid=187, Invalid=1453, Unknown=0, NotChecked=0, Total=1640 [2021-07-13 19:42:10,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2951 states. [2021-07-13 19:42:10,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2951 to 2831. [2021-07-13 19:42:10,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2831 states, 2830 states have (on average 2.824381625441696) internal successors, (7993), 2830 states have internal predecessors, (7993), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:10,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2831 states to 2831 states and 7993 transitions. [2021-07-13 19:42:10,410 INFO L78 Accepts]: Start accepts. Automaton has 2831 states and 7993 transitions. Word has length 19 [2021-07-13 19:42:10,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:42:10,410 INFO L482 AbstractCegarLoop]: Abstraction has 2831 states and 7993 transitions. [2021-07-13 19:42:10,410 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:10,410 INFO L276 IsEmpty]: Start isEmpty. Operand 2831 states and 7993 transitions. [2021-07-13 19:42:10,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:42:10,413 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:42:10,413 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:42:10,614 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 644 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4671 [2021-07-13 19:42:10,614 INFO L430 AbstractCegarLoop]: === Iteration 654 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:42:10,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:42:10,614 INFO L82 PathProgramCache]: Analyzing trace with hash -77932294, now seen corresponding path program 640 times [2021-07-13 19:42:10,614 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:42:10,614 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138962033] [2021-07-13 19:42:10,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:42:10,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:42:10,714 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:10,714 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:42:10,714 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138962033] [2021-07-13 19:42:10,715 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1138962033] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:10,715 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [379108548] [2021-07-13 19:42:10,715 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 645 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 645 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:42:10,741 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:42:10,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:42:10,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 19:42:10,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:42:10,890 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:10,890 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:10,891 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:42:10,891 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:10,893 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:10,894 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:10,894 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:42:10,895 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:10,897 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:10,897 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:10,898 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:42:10,898 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:10,900 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:10,900 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:42:10,901 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:10,933 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-07-13 19:42:10,933 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:42:10,934 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:42:10,934 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-07-13 19:42:10,987 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:10,987 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [379108548] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:10,987 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:42:10,987 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 21 [2021-07-13 19:42:10,987 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454733190] [2021-07-13 19:42:10,988 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:42:10,988 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:42:10,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:42:10,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=367, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:42:10,988 INFO L87 Difference]: Start difference. First operand 2831 states and 7993 transitions. Second operand has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:11,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:42:11,552 INFO L93 Difference]: Finished difference Result 2951 states and 8218 transitions. [2021-07-13 19:42:11,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-13 19:42:11,552 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:42:11,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:42:11,556 INFO L225 Difference]: With dead ends: 2951 [2021-07-13 19:42:11,556 INFO L226 Difference]: Without dead ends: 2951 [2021-07-13 19:42:11,556 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 507.1ms TimeCoverageRelationStatistics Valid=123, Invalid=869, Unknown=0, NotChecked=0, Total=992 [2021-07-13 19:42:11,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2951 states. [2021-07-13 19:42:11,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2951 to 2810. [2021-07-13 19:42:11,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2810 states, 2809 states have (on average 2.8248487006051977) internal successors, (7935), 2809 states have internal predecessors, (7935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:11,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2810 states to 2810 states and 7935 transitions. [2021-07-13 19:42:11,592 INFO L78 Accepts]: Start accepts. Automaton has 2810 states and 7935 transitions. Word has length 19 [2021-07-13 19:42:11,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:42:11,592 INFO L482 AbstractCegarLoop]: Abstraction has 2810 states and 7935 transitions. [2021-07-13 19:42:11,592 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:11,592 INFO L276 IsEmpty]: Start isEmpty. Operand 2810 states and 7935 transitions. [2021-07-13 19:42:11,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:42:11,595 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:42:11,595 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:42:11,799 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 645 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4677 [2021-07-13 19:42:11,800 INFO L430 AbstractCegarLoop]: === Iteration 655 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:42:11,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:42:11,800 INFO L82 PathProgramCache]: Analyzing trace with hash -2084462630, now seen corresponding path program 641 times [2021-07-13 19:42:11,800 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:42:11,800 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746223595] [2021-07-13 19:42:11,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:42:11,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:42:11,880 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:42:11,881 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:42:11,881 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746223595] [2021-07-13 19:42:11,881 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1746223595] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:11,881 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [695881628] [2021-07-13 19:42:11,881 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 646 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 646 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:42:11,910 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:42:11,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:42:11,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 19:42:11,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:42:12,042 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:12,042 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:12,043 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:42:12,043 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:12,045 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:12,046 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:12,046 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:42:12,047 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:12,049 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:12,049 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:12,049 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:42:12,050 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:12,052 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:12,052 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:42:12,053 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:12,086 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-07-13 19:42:12,086 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-13 19:42:12,087 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:42:12,087 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-07-13 19:42:12,158 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:12,158 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [695881628] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:12,158 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:42:12,158 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 20 [2021-07-13 19:42:12,158 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332003623] [2021-07-13 19:42:12,159 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 19:42:12,159 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:42:12,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 19:42:12,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:42:12,159 INFO L87 Difference]: Start difference. First operand 2810 states and 7935 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:12,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:42:12,808 INFO L93 Difference]: Finished difference Result 2858 states and 8036 transitions. [2021-07-13 19:42:12,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-13 19:42:12,808 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:42:12,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:42:12,812 INFO L225 Difference]: With dead ends: 2858 [2021-07-13 19:42:12,812 INFO L226 Difference]: Without dead ends: 2854 [2021-07-13 19:42:12,812 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 617.0ms TimeCoverageRelationStatistics Valid=164, Invalid=1168, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 19:42:12,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2854 states. [2021-07-13 19:42:12,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2854 to 2803. [2021-07-13 19:42:12,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2803 states, 2802 states have (on average 2.8265524625267666) internal successors, (7920), 2802 states have internal predecessors, (7920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:12,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2803 states to 2803 states and 7920 transitions. [2021-07-13 19:42:12,845 INFO L78 Accepts]: Start accepts. Automaton has 2803 states and 7920 transitions. Word has length 19 [2021-07-13 19:42:12,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:42:12,845 INFO L482 AbstractCegarLoop]: Abstraction has 2803 states and 7920 transitions. [2021-07-13 19:42:12,845 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:12,845 INFO L276 IsEmpty]: Start isEmpty. Operand 2803 states and 7920 transitions. [2021-07-13 19:42:12,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:42:12,848 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:42:12,848 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] Received shutdown request... [2021-07-13 19:42:13,064 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 646 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4681 [2021-07-13 19:42:13,064 INFO L430 AbstractCegarLoop]: === Iteration 656 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:42:13,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:42:13,064 INFO L82 PathProgramCache]: Analyzing trace with hash 1643481336, now seen corresponding path program 642 times [2021-07-13 19:42:13,064 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:42:13,064 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7039745] [2021-07-13 19:42:13,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:42:13,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2021-07-13 19:42:13,066 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1549566061] [2021-07-13 19:42:13,066 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 647 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 647 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:42:13,094 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:42:13,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:42:13,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 19:42:13,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:42:13,100 WARN L222 SmtUtils]: Removed 1 from assertion stack [2021-07-13 19:42:13,300 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4686,647 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:42:13,300 WARN L547 AbstractCegarLoop]: Verification canceled [2021-07-13 19:42:13,302 INFO L247 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-07-13 19:42:13,303 WARN L196 ceAbstractionStarter]: Timeout [2021-07-13 19:42:13,303 INFO L202 PluginConnector]: Adding new model array-int-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.07 07:42:13 BasicIcfg [2021-07-13 19:42:13,304 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-07-13 19:42:13,304 INFO L168 Benchmark]: Toolchain (without parser) took 863630.70 ms. Allocated memory was 195.0 MB in the beginning and 488.6 MB in the end (delta: 293.6 MB). Free memory was 176.5 MB in the beginning and 320.0 MB in the end (delta: -143.5 MB). Peak memory consumption was 151.3 MB. Max. memory is 8.0 GB. [2021-07-13 19:42:13,304 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.09 ms. Allocated memory is still 195.0 MB. Free memory is still 177.7 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-07-13 19:42:13,304 INFO L168 Benchmark]: Boogie Procedure Inliner took 24.69 ms. Allocated memory is still 195.0 MB. Free memory was 176.5 MB in the beginning and 175.0 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-07-13 19:42:13,304 INFO L168 Benchmark]: Boogie Preprocessor took 28.39 ms. Allocated memory is still 195.0 MB. Free memory was 175.0 MB in the beginning and 173.9 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-07-13 19:42:13,304 INFO L168 Benchmark]: RCFGBuilder took 287.54 ms. Allocated memory is still 195.0 MB. Free memory was 173.9 MB in the beginning and 156.8 MB in the end (delta: 17.1 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. [2021-07-13 19:42:13,304 INFO L168 Benchmark]: TraceAbstraction took 863284.55 ms. Allocated memory was 195.0 MB in the beginning and 488.6 MB in the end (delta: 293.6 MB). Free memory was 156.4 MB in the beginning and 320.0 MB in the end (delta: -163.6 MB). Peak memory consumption was 131.4 MB. Max. memory is 8.0 GB. [2021-07-13 19:42:13,304 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.09 ms. Allocated memory is still 195.0 MB. Free memory is still 177.7 MB. There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 24.69 ms. Allocated memory is still 195.0 MB. Free memory was 176.5 MB in the beginning and 175.0 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 28.39 ms. Allocated memory is still 195.0 MB. Free memory was 175.0 MB in the beginning and 173.9 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 287.54 ms. Allocated memory is still 195.0 MB. Free memory was 173.9 MB in the beginning and 156.8 MB in the end (delta: 17.1 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. * TraceAbstraction took 863284.55 ms. Allocated memory was 195.0 MB in the beginning and 488.6 MB in the end (delta: 293.6 MB). Free memory was 156.4 MB in the beginning and 320.0 MB in the end (delta: -163.6 MB). Peak memory consumption was 131.4 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 66]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was analyzing trace of length 20 with TraceHistMax 5,while TraceCheckSpWp was constructing forward predicates,while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 3 for 0ms.. - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: ULTIMATE.start with 1 thread instances CFG has 5 procedures, 23 locations, 3 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 863212.9ms, OverallIterations: 656, TraceHistogramMax: 5, EmptinessCheckTime: 916.4ms, AutomataDifference: 430511.7ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 22.1ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 20321 SDtfs, 42588 SDslu, 171778 SDs, 0 SdLazy, 375356 SolverSat, 11100 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 147368.6ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 26391 GetRequests, 6654 SyntacticMatches, 715 SemanticMatches, 19022 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145828 ImplicationChecksByTransitivity, 433395.8ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=2879occurred in iteration=651, InterpolantAutomatonStates: 16771, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 10063.3ms AutomataMinimizationTime, 655 MinimizatonAttempts, 113305 StatesRemovedByMinimization, 655 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 2383.7ms SsaConstructionTime, 8674.4ms SatisfiabilityAnalysisTime, 268134.2ms InterpolantComputationTime, 22344 NumberOfCodeBlocks, 22344 NumberOfCodeBlocksAsserted, 2306 NumberOfCheckSat, 21044 ConstructedInterpolants, 669 QuantifiedInterpolants, 305575 SizeOfPredicates, 4136 NumberOfNonLiveVariables, 55404 ConjunctsInSsa, 17531 ConjunctsInUnsatCore, 1300 InterpolantComputations, 10 PerfectInterpolantSequences, 3221/22962 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown