/usr/bin/java -Xmx16000000000 -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/popl20-bad/counter-queue.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-a865e3bea3ade1065a4c95009cfa501fe03c5538-a865e3b [2021-02-19 18:42:11,523 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-19 18:42:11,525 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-19 18:42:11,562 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-02-19 18:42:11,617 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 [2021-02-19 18:42:11,650 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-19 18:42:11,651 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-19 18:42:11,651 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-02-19 18:42:11,651 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-02-19 18:42:11,654 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-02-19 18:42:11,654 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-02-19 18:42:11,654 INFO L138 SettingsManager]: * Use SBE=true [2021-02-19 18:42:11,655 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-19 18:42:11,655 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-19 18:42:11,655 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-19 18:42:11,656 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-19 18:42:11,656 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-19 18:42:11,656 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-19 18:42:11,656 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-19 18:42:11,656 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-19 18:42:11,656 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-19 18:42:11,657 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-19 18:42:11,657 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-19 18:42:11,657 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-19 18:42:11,657 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-19 18:42:11,657 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-02-19 18:42:11,657 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-19 18:42:11,658 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-19 18:42:11,658 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-19 18:42:11,658 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-19 18:42:11,658 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-02-19 18:42:11,658 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-02-19 18:42:11,659 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-02-19 18:42:11,659 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-02-19 18:42:11,659 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-02-19 18:42:11,659 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-19 18:42:11,659 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-19 18:42:11,938 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-19 18:42:11,965 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-19 18:42:11,967 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-19 18:42:11,968 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-02-19 18:42:11,969 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-02-19 18:42:11,970 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-bad/counter-queue.wvr.bpl [2021-02-19 18:42:11,970 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-bad/counter-queue.wvr.bpl' [2021-02-19 18:42:11,997 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-19 18:42:12,005 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-19 18:42:12,006 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-02-19 18:42:12,007 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-02-19 18:42:12,007 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-02-19 18:42:12,017 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "counter-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 06:42:11" (1/1) ... [2021-02-19 18:42:12,024 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "counter-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 06:42:11" (1/1) ... [2021-02-19 18:42:12,029 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-02-19 18:42:12,031 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-19 18:42:12,031 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-19 18:42:12,032 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-19 18:42:12,040 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "counter-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 06:42:11" (1/1) ... [2021-02-19 18:42:12,040 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "counter-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 06:42:11" (1/1) ... [2021-02-19 18:42:12,041 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "counter-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 06:42:11" (1/1) ... [2021-02-19 18:42:12,041 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "counter-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 06:42:11" (1/1) ... [2021-02-19 18:42:12,044 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "counter-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 06:42:11" (1/1) ... [2021-02-19 18:42:12,047 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "counter-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 06:42:11" (1/1) ... [2021-02-19 18:42:12,047 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "counter-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 06:42:11" (1/1) ... [2021-02-19 18:42:12,048 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-19 18:42:12,049 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-19 18:42:12,049 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-19 18:42:12,049 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-19 18:42:12,051 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "counter-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 06:42:11" (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 [2021-02-19 18:42:12,111 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-02-19 18:42:12,111 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-02-19 18:42:12,111 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-02-19 18:42:12,111 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-02-19 18:42:12,112 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-02-19 18:42:12,112 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-02-19 18:42:12,112 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-02-19 18:42:12,112 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-19 18:42:12,112 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-19 18:42:12,113 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-02-19 18:42:12,263 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-19 18:42:12,263 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-02-19 18:42:12,264 INFO L202 PluginConnector]: Adding new model counter-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.02 06:42:12 BoogieIcfgContainer [2021-02-19 18:42:12,265 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-19 18:42:12,266 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-19 18:42:12,266 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-19 18:42:12,268 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-19 18:42:12,268 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "counter-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 06:42:11" (1/2) ... [2021-02-19 18:42:12,269 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68011f79 and model type counter-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.02 06:42:12, skipping insertion in model container [2021-02-19 18:42:12,269 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "counter-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.02 06:42:12" (2/2) ... [2021-02-19 18:42:12,270 INFO L111 eAbstractionObserver]: Analyzing ICFG counter-queue.wvr.bpl [2021-02-19 18:42:12,274 WARN L142 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-02-19 18:42:12,275 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-02-19 18:42:12,277 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-19 18:42:12,278 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-02-19 18:42:12,299 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-02-19 18:42:12,312 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-02-19 18:42:12,326 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-19 18:42:12,326 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-19 18:42:12,326 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-02-19 18:42:12,326 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-19 18:42:12,327 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-19 18:42:12,327 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-19 18:42:12,327 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-19 18:42:12,327 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-19 18:42:12,334 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 27 places, 22 transitions, 60 flow [2021-02-19 18:42:12,342 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 34 states, 32 states have (on average 1.8125) internal successors, (58), 33 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) [2021-02-19 18:42:12,343 INFO L276 IsEmpty]: Start isEmpty. Operand has 34 states, 32 states have (on average 1.8125) internal successors, (58), 33 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) [2021-02-19 18:42:12,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-02-19 18:42:12,348 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:42:12,348 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:42:12,349 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:42:12,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:42:12,352 INFO L82 PathProgramCache]: Analyzing trace with hash -282831259, now seen corresponding path program 1 times [2021-02-19 18:42:12,358 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:42:12,358 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081168304] [2021-02-19 18:42:12,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:42:12,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:42:12,512 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:42:12,512 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081168304] [2021-02-19 18:42:12,513 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 18:42:12,513 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-02-19 18:42:12,514 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358565192] [2021-02-19 18:42:12,517 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-02-19 18:42:12,517 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:42:12,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-02-19 18:42:12,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-19 18:42:12,528 INFO L87 Difference]: Start difference. First operand has 34 states, 32 states have (on average 1.8125) internal successors, (58), 33 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) Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:42:12,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:42:12,562 INFO L93 Difference]: Finished difference Result 57 states and 105 transitions. [2021-02-19 18:42:12,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-02-19 18:42:12,563 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have 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 [2021-02-19 18:42:12,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:42:12,573 INFO L225 Difference]: With dead ends: 57 [2021-02-19 18:42:12,574 INFO L226 Difference]: Without dead ends: 50 [2021-02-19 18:42:12,575 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-19 18:42:12,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-02-19 18:42:12,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 41. [2021-02-19 18:42:12,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.85) internal successors, (74), 40 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) [2021-02-19 18:42:12,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 74 transitions. [2021-02-19 18:42:12,611 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 74 transitions. Word has length 14 [2021-02-19 18:42:12,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:42:12,612 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 74 transitions. [2021-02-19 18:42:12,613 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:42:12,613 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 74 transitions. [2021-02-19 18:42:12,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-02-19 18:42:12,614 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:42:12,614 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:42:12,615 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-19 18:42:12,615 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:42:12,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:42:12,619 INFO L82 PathProgramCache]: Analyzing trace with hash 1529673955, now seen corresponding path program 1 times [2021-02-19 18:42:12,620 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:42:12,621 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996741406] [2021-02-19 18:42:12,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:42:12,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:42:12,744 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:42:12,745 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996741406] [2021-02-19 18:42:12,745 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1208973764] [2021-02-19 18:42:12,746 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 [2021-02-19 18:42:12,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:42:12,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 5 conjunts are in the unsatisfiable core [2021-02-19 18:42:12,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:42:12,956 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:42:12,956 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:42:12,956 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 9 [2021-02-19 18:42:12,957 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916077017] [2021-02-19 18:42:12,957 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-19 18:42:12,958 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:42:12,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-19 18:42:12,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-02-19 18:42:12,959 INFO L87 Difference]: Start difference. First operand 41 states and 74 transitions. Second operand has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 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) [2021-02-19 18:42:13,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:42:13,138 INFO L93 Difference]: Finished difference Result 68 states and 120 transitions. [2021-02-19 18:42:13,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-02-19 18:42:13,139 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 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 [2021-02-19 18:42:13,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:42:13,141 INFO L225 Difference]: With dead ends: 68 [2021-02-19 18:42:13,141 INFO L226 Difference]: Without dead ends: 68 [2021-02-19 18:42:13,142 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2021-02-19 18:42:13,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-02-19 18:42:13,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 41. [2021-02-19 18:42:13,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.9) internal successors, (76), 40 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:42:13,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 76 transitions. [2021-02-19 18:42:13,147 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 76 transitions. Word has length 16 [2021-02-19 18:42:13,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:42:13,148 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 76 transitions. [2021-02-19 18:42:13,148 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 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) [2021-02-19 18:42:13,148 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 76 transitions. [2021-02-19 18:42:13,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-02-19 18:42:13,149 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:42:13,149 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:42:13,370 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-02-19 18:42:13,370 INFO L428 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:42:13,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:42:13,371 INFO L82 PathProgramCache]: Analyzing trace with hash 241792871, now seen corresponding path program 1 times [2021-02-19 18:42:13,371 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:42:13,371 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150898954] [2021-02-19 18:42:13,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:42:13,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:42:13,418 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:42:13,418 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150898954] [2021-02-19 18:42:13,418 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 18:42:13,419 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-02-19 18:42:13,419 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520287785] [2021-02-19 18:42:13,419 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-19 18:42:13,419 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:42:13,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-19 18:42:13,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-02-19 18:42:13,420 INFO L87 Difference]: Start difference. First operand 41 states and 76 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:42:13,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:42:13,494 INFO L93 Difference]: Finished difference Result 71 states and 125 transitions. [2021-02-19 18:42:13,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-02-19 18:42:13,495 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have 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 [2021-02-19 18:42:13,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:42:13,499 INFO L225 Difference]: With dead ends: 71 [2021-02-19 18:42:13,501 INFO L226 Difference]: Without dead ends: 66 [2021-02-19 18:42:13,501 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-02-19 18:42:13,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-02-19 18:42:13,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 49. [2021-02-19 18:42:13,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.8958333333333333) internal successors, (91), 48 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:42:13,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 91 transitions. [2021-02-19 18:42:13,511 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 91 transitions. Word has length 16 [2021-02-19 18:42:13,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:42:13,511 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 91 transitions. [2021-02-19 18:42:13,511 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:42:13,511 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 91 transitions. [2021-02-19 18:42:13,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-02-19 18:42:13,512 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:42:13,512 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:42:13,512 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-02-19 18:42:13,512 INFO L428 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:42:13,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:42:13,513 INFO L82 PathProgramCache]: Analyzing trace with hash -1592499929, now seen corresponding path program 2 times [2021-02-19 18:42:13,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:42:13,513 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912699965] [2021-02-19 18:42:13,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:42:13,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:42:13,586 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:42:13,586 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912699965] [2021-02-19 18:42:13,586 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 18:42:13,587 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-02-19 18:42:13,587 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973700357] [2021-02-19 18:42:13,587 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-19 18:42:13,588 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:42:13,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-19 18:42:13,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-02-19 18:42:13,590 INFO L87 Difference]: Start difference. First operand 49 states and 91 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:42:13,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:42:13,642 INFO L93 Difference]: Finished difference Result 51 states and 94 transitions. [2021-02-19 18:42:13,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-02-19 18:42:13,642 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have 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 [2021-02-19 18:42:13,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:42:13,644 INFO L225 Difference]: With dead ends: 51 [2021-02-19 18:42:13,644 INFO L226 Difference]: Without dead ends: 51 [2021-02-19 18:42:13,644 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-02-19 18:42:13,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-02-19 18:42:13,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 43. [2021-02-19 18:42:13,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.880952380952381) internal successors, (79), 42 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:42:13,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 79 transitions. [2021-02-19 18:42:13,655 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 79 transitions. Word has length 16 [2021-02-19 18:42:13,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:42:13,655 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 79 transitions. [2021-02-19 18:42:13,655 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:42:13,656 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 79 transitions. [2021-02-19 18:42:13,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-02-19 18:42:13,656 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:42:13,656 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:42:13,657 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-02-19 18:42:13,657 INFO L428 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:42:13,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:42:13,659 INFO L82 PathProgramCache]: Analyzing trace with hash -1924178717, now seen corresponding path program 2 times [2021-02-19 18:42:13,659 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:42:13,660 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502775799] [2021-02-19 18:42:13,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:42:13,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:42:13,700 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:42:13,701 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502775799] [2021-02-19 18:42:13,701 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 18:42:13,701 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-02-19 18:42:13,701 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809060559] [2021-02-19 18:42:13,702 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-19 18:42:13,702 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:42:13,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-19 18:42:13,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-02-19 18:42:13,704 INFO L87 Difference]: Start difference. First operand 43 states and 79 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:42:13,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:42:13,769 INFO L93 Difference]: Finished difference Result 51 states and 92 transitions. [2021-02-19 18:42:13,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-02-19 18:42:13,770 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have 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 [2021-02-19 18:42:13,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:42:13,770 INFO L225 Difference]: With dead ends: 51 [2021-02-19 18:42:13,770 INFO L226 Difference]: Without dead ends: 49 [2021-02-19 18:42:13,771 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-02-19 18:42:13,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-02-19 18:42:13,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 43. [2021-02-19 18:42:13,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.8571428571428572) internal successors, (78), 42 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) [2021-02-19 18:42:13,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 78 transitions. [2021-02-19 18:42:13,779 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 78 transitions. Word has length 16 [2021-02-19 18:42:13,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:42:13,779 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 78 transitions. [2021-02-19 18:42:13,779 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:42:13,779 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 78 transitions. [2021-02-19 18:42:13,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-02-19 18:42:13,780 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:42:13,780 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:42:13,780 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-02-19 18:42:13,780 INFO L428 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:42:13,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:42:13,781 INFO L82 PathProgramCache]: Analyzing trace with hash -1697418651, now seen corresponding path program 1 times [2021-02-19 18:42:13,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:42:13,781 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357307529] [2021-02-19 18:42:13,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:42:13,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:42:13,953 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:42:13,953 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357307529] [2021-02-19 18:42:13,953 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1982511531] [2021-02-19 18:42:13,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2021-02-19 18:42:13,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:42:13,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 11 conjunts are in the unsatisfiable core [2021-02-19 18:42:13,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:42:14,189 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:42:14,194 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 19 treesize of output 7 [2021-02-19 18:42:14,196 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:42:14,202 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:42:14,206 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:42:14,207 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:7 [2021-02-19 18:42:14,242 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:42:14,242 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:42:14,243 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-02-19 18:42:14,243 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96501779] [2021-02-19 18:42:14,243 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-02-19 18:42:14,243 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:42:14,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-02-19 18:42:14,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-02-19 18:42:14,248 INFO L87 Difference]: Start difference. First operand 43 states and 78 transitions. Second operand has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:42:14,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:42:14,326 INFO L93 Difference]: Finished difference Result 86 states and 163 transitions. [2021-02-19 18:42:14,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-02-19 18:42:14,328 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have 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 [2021-02-19 18:42:14,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:42:14,331 INFO L225 Difference]: With dead ends: 86 [2021-02-19 18:42:14,331 INFO L226 Difference]: Without dead ends: 79 [2021-02-19 18:42:14,331 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-02-19 18:42:14,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-02-19 18:42:14,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 59. [2021-02-19 18:42:14,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 1.9310344827586208) internal successors, (112), 58 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) [2021-02-19 18:42:14,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 112 transitions. [2021-02-19 18:42:14,337 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 112 transitions. Word has length 18 [2021-02-19 18:42:14,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:42:14,337 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 112 transitions. [2021-02-19 18:42:14,337 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:42:14,337 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 112 transitions. [2021-02-19 18:42:14,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-02-19 18:42:14,338 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:42:14,338 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:42:14,558 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:42:14,558 INFO L428 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:42:14,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:42:14,559 INFO L82 PathProgramCache]: Analyzing trace with hash 1860079347, now seen corresponding path program 2 times [2021-02-19 18:42:14,559 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:42:14,559 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687384716] [2021-02-19 18:42:14,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:42:14,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:42:14,659 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:42:14,660 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687384716] [2021-02-19 18:42:14,660 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [177458499] [2021-02-19 18:42:14,660 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 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-02-19 18:42:14,690 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 18:42:14,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:42:14,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 11 conjunts are in the unsatisfiable core [2021-02-19 18:42:14,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:42:14,764 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:42:14,765 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 19 treesize of output 7 [2021-02-19 18:42:14,766 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:42:14,772 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:42:14,774 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:42:14,774 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:7 [2021-02-19 18:42:14,821 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:42:14,821 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:42:14,821 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-02-19 18:42:14,821 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844647905] [2021-02-19 18:42:14,822 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-02-19 18:42:14,822 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:42:14,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-02-19 18:42:14,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-02-19 18:42:14,822 INFO L87 Difference]: Start difference. First operand 59 states and 112 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 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) [2021-02-19 18:42:14,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:42:14,878 INFO L93 Difference]: Finished difference Result 94 states and 180 transitions. [2021-02-19 18:42:14,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-02-19 18:42:14,878 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 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 18 [2021-02-19 18:42:14,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:42:14,879 INFO L225 Difference]: With dead ends: 94 [2021-02-19 18:42:14,879 INFO L226 Difference]: Without dead ends: 87 [2021-02-19 18:42:14,879 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-02-19 18:42:14,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-02-19 18:42:14,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 65. [2021-02-19 18:42:14,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 1.9375) internal successors, (124), 64 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) [2021-02-19 18:42:14,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 124 transitions. [2021-02-19 18:42:14,883 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 124 transitions. Word has length 18 [2021-02-19 18:42:14,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:42:14,884 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 124 transitions. [2021-02-19 18:42:14,884 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 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) [2021-02-19 18:42:14,884 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 124 transitions. [2021-02-19 18:42:14,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-19 18:42:14,884 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:42:14,885 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:42:15,098 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:42:15,098 INFO L428 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:42:15,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:42:15,098 INFO L82 PathProgramCache]: Analyzing trace with hash -1263884829, now seen corresponding path program 3 times [2021-02-19 18:42:15,098 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:42:15,099 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571033739] [2021-02-19 18:42:15,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:42:15,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:42:15,163 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:42:15,164 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571033739] [2021-02-19 18:42:15,164 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [839991480] [2021-02-19 18:42:15,164 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 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 [2021-02-19 18:42:15,187 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 18:42:15,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:42:15,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 18:42:15,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:42:15,310 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:42:15,311 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:42:15,311 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 13 [2021-02-19 18:42:15,311 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161573968] [2021-02-19 18:42:15,311 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-19 18:42:15,311 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:42:15,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-19 18:42:15,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-02-19 18:42:15,312 INFO L87 Difference]: Start difference. First operand 65 states and 124 transitions. Second operand has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 13 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:42:15,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:42:15,635 INFO L93 Difference]: Finished difference Result 176 states and 326 transitions. [2021-02-19 18:42:15,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-02-19 18:42:15,635 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 13 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-02-19 18:42:15,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:42:15,636 INFO L225 Difference]: With dead ends: 176 [2021-02-19 18:42:15,636 INFO L226 Difference]: Without dead ends: 176 [2021-02-19 18:42:15,637 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=185, Invalid=465, Unknown=0, NotChecked=0, Total=650 [2021-02-19 18:42:15,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2021-02-19 18:42:15,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 73. [2021-02-19 18:42:15,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 2.0833333333333335) internal successors, (150), 72 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:42:15,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 150 transitions. [2021-02-19 18:42:15,642 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 150 transitions. Word has length 20 [2021-02-19 18:42:15,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:42:15,642 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 150 transitions. [2021-02-19 18:42:15,642 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 13 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:42:15,642 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 150 transitions. [2021-02-19 18:42:15,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-19 18:42:15,643 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:42:15,643 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:42:15,864 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:42:15,864 INFO L428 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:42:15,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:42:15,865 INFO L82 PathProgramCache]: Analyzing trace with hash -1967025305, now seen corresponding path program 4 times [2021-02-19 18:42:15,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:42:15,865 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837672994] [2021-02-19 18:42:15,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:42:15,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:42:15,931 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:42:15,931 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837672994] [2021-02-19 18:42:15,931 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1062463528] [2021-02-19 18:42:15,931 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 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 [2021-02-19 18:42:15,952 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 18:42:15,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:42:15,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 18:42:15,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:42:16,081 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:42:16,081 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:42:16,081 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-02-19 18:42:16,081 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378605364] [2021-02-19 18:42:16,081 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 18:42:16,081 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:42:16,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 18:42:16,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-02-19 18:42:16,082 INFO L87 Difference]: Start difference. First operand 73 states and 150 transitions. Second operand has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 12 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) [2021-02-19 18:42:16,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:42:16,412 INFO L93 Difference]: Finished difference Result 219 states and 406 transitions. [2021-02-19 18:42:16,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-02-19 18:42:16,418 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 12 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 20 [2021-02-19 18:42:16,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:42:16,420 INFO L225 Difference]: With dead ends: 219 [2021-02-19 18:42:16,420 INFO L226 Difference]: Without dead ends: 205 [2021-02-19 18:42:16,420 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=177, Invalid=473, Unknown=0, NotChecked=0, Total=650 [2021-02-19 18:42:16,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2021-02-19 18:42:16,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 102. [2021-02-19 18:42:16,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 101 states have (on average 2.1386138613861387) internal successors, (216), 101 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:42:16,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 216 transitions. [2021-02-19 18:42:16,433 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 216 transitions. Word has length 20 [2021-02-19 18:42:16,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:42:16,434 INFO L480 AbstractCegarLoop]: Abstraction has 102 states and 216 transitions. [2021-02-19 18:42:16,434 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 12 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) [2021-02-19 18:42:16,434 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 216 transitions. [2021-02-19 18:42:16,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-19 18:42:16,437 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:42:16,437 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:42:16,654 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:42:16,654 INFO L428 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:42:16,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:42:16,654 INFO L82 PathProgramCache]: Analyzing trace with hash -1377655769, now seen corresponding path program 5 times [2021-02-19 18:42:16,654 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:42:16,654 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713433337] [2021-02-19 18:42:16,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:42:16,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:42:16,696 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:42:16,696 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713433337] [2021-02-19 18:42:16,697 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1371618586] [2021-02-19 18:42:16,697 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 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 [2021-02-19 18:42:16,721 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-02-19 18:42:16,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:42:16,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 18:42:16,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:42:16,820 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:42:16,820 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:42:16,820 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2021-02-19 18:42:16,820 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521645227] [2021-02-19 18:42:16,821 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-02-19 18:42:16,821 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:42:16,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-02-19 18:42:16,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-02-19 18:42:16,822 INFO L87 Difference]: Start difference. First operand 102 states and 216 transitions. Second operand has 12 states, 12 states have (on average 2.5) internal successors, (30), 11 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) [2021-02-19 18:42:17,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:42:17,117 INFO L93 Difference]: Finished difference Result 208 states and 404 transitions. [2021-02-19 18:42:17,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-02-19 18:42:17,118 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 11 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 20 [2021-02-19 18:42:17,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:42:17,119 INFO L225 Difference]: With dead ends: 208 [2021-02-19 18:42:17,119 INFO L226 Difference]: Without dead ends: 208 [2021-02-19 18:42:17,119 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=155, Invalid=351, Unknown=0, NotChecked=0, Total=506 [2021-02-19 18:42:17,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2021-02-19 18:42:17,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 118. [2021-02-19 18:42:17,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 117 states have (on average 2.2051282051282053) internal successors, (258), 117 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:42:17,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 258 transitions. [2021-02-19 18:42:17,123 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 258 transitions. Word has length 20 [2021-02-19 18:42:17,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:42:17,123 INFO L480 AbstractCegarLoop]: Abstraction has 118 states and 258 transitions. [2021-02-19 18:42:17,123 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 11 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) [2021-02-19 18:42:17,123 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 258 transitions. [2021-02-19 18:42:17,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-19 18:42:17,124 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:42:17,124 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:42:17,338 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:42:17,338 INFO L428 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:42:17,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:42:17,338 INFO L82 PathProgramCache]: Analyzing trace with hash -1709334557, now seen corresponding path program 6 times [2021-02-19 18:42:17,339 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:42:17,339 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681683817] [2021-02-19 18:42:17,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:42:17,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:42:17,383 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:42:17,383 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681683817] [2021-02-19 18:42:17,383 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1749951069] [2021-02-19 18:42:17,383 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 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 [2021-02-19 18:42:17,434 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-02-19 18:42:17,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:42:17,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 18:42:17,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:42:17,535 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:42:17,535 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:42:17,535 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2021-02-19 18:42:17,535 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079732972] [2021-02-19 18:42:17,536 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-02-19 18:42:17,536 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:42:17,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-02-19 18:42:17,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-02-19 18:42:17,537 INFO L87 Difference]: Start difference. First operand 118 states and 258 transitions. Second operand has 12 states, 12 states have (on average 2.5) internal successors, (30), 11 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) [2021-02-19 18:42:17,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:42:17,814 INFO L93 Difference]: Finished difference Result 205 states and 416 transitions. [2021-02-19 18:42:17,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-02-19 18:42:17,814 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 11 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 20 [2021-02-19 18:42:17,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:42:17,815 INFO L225 Difference]: With dead ends: 205 [2021-02-19 18:42:17,815 INFO L226 Difference]: Without dead ends: 203 [2021-02-19 18:42:17,816 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=176, Invalid=424, Unknown=0, NotChecked=0, Total=600 [2021-02-19 18:42:17,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2021-02-19 18:42:17,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 120. [2021-02-19 18:42:17,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 119 states have (on average 2.1848739495798317) internal successors, (260), 119 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:42:17,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 260 transitions. [2021-02-19 18:42:17,821 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 260 transitions. Word has length 20 [2021-02-19 18:42:17,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:42:17,821 INFO L480 AbstractCegarLoop]: Abstraction has 120 states and 260 transitions. [2021-02-19 18:42:17,821 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 11 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) [2021-02-19 18:42:17,821 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 260 transitions. [2021-02-19 18:42:17,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-19 18:42:17,822 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:42:17,822 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:42:18,038 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:42:18,038 INFO L428 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:42:18,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:42:18,039 INFO L82 PathProgramCache]: Analyzing trace with hash 697543669, now seen corresponding path program 7 times [2021-02-19 18:42:18,039 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:42:18,039 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317811111] [2021-02-19 18:42:18,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:42:18,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:42:18,091 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 18:42:18,091 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317811111] [2021-02-19 18:42:18,091 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [820338971] [2021-02-19 18:42:18,091 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 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 [2021-02-19 18:42:18,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:42:18,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 18:42:18,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:42:18,208 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:42:18,208 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:42:18,208 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-02-19 18:42:18,208 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892580809] [2021-02-19 18:42:18,209 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 18:42:18,211 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:42:18,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 18:42:18,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-02-19 18:42:18,212 INFO L87 Difference]: Start difference. First operand 120 states and 260 transitions. Second operand has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:42:18,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:42:18,536 INFO L93 Difference]: Finished difference Result 300 states and 609 transitions. [2021-02-19 18:42:18,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-02-19 18:42:18,536 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-02-19 18:42:18,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:42:18,538 INFO L225 Difference]: With dead ends: 300 [2021-02-19 18:42:18,538 INFO L226 Difference]: Without dead ends: 300 [2021-02-19 18:42:18,538 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=218, Invalid=484, Unknown=0, NotChecked=0, Total=702 [2021-02-19 18:42:18,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2021-02-19 18:42:18,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 165. [2021-02-19 18:42:18,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 164 states have (on average 2.292682926829268) internal successors, (376), 164 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:42:18,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 376 transitions. [2021-02-19 18:42:18,548 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 376 transitions. Word has length 20 [2021-02-19 18:42:18,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:42:18,549 INFO L480 AbstractCegarLoop]: Abstraction has 165 states and 376 transitions. [2021-02-19 18:42:18,549 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:42:18,549 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 376 transitions. [2021-02-19 18:42:18,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-19 18:42:18,551 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:42:18,551 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:42:18,773 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-02-19 18:42:18,773 INFO L428 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:42:18,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:42:18,774 INFO L82 PathProgramCache]: Analyzing trace with hash -2005416843, now seen corresponding path program 8 times [2021-02-19 18:42:18,774 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:42:18,774 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162741293] [2021-02-19 18:42:18,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:42:18,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:42:18,812 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 18:42:18,812 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162741293] [2021-02-19 18:42:18,812 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [416785782] [2021-02-19 18:42:18,812 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 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 [2021-02-19 18:42:18,863 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 18:42:18,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:42:18,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 18:42:18,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:42:18,964 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:42:18,964 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:42:18,964 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2021-02-19 18:42:18,965 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718627614] [2021-02-19 18:42:18,965 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-02-19 18:42:18,965 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:42:18,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-02-19 18:42:18,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-02-19 18:42:18,966 INFO L87 Difference]: Start difference. First operand 165 states and 376 transitions. Second operand has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 11 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) [2021-02-19 18:42:19,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:42:19,186 INFO L93 Difference]: Finished difference Result 238 states and 512 transitions. [2021-02-19 18:42:19,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-02-19 18:42:19,187 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 11 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 20 [2021-02-19 18:42:19,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:42:19,188 INFO L225 Difference]: With dead ends: 238 [2021-02-19 18:42:19,188 INFO L226 Difference]: Without dead ends: 235 [2021-02-19 18:42:19,188 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=129, Invalid=333, Unknown=0, NotChecked=0, Total=462 [2021-02-19 18:42:19,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2021-02-19 18:42:19,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 183. [2021-02-19 18:42:19,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 182 states have (on average 2.340659340659341) internal successors, (426), 182 states have internal predecessors, (426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:42:19,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 426 transitions. [2021-02-19 18:42:19,194 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 426 transitions. Word has length 20 [2021-02-19 18:42:19,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:42:19,194 INFO L480 AbstractCegarLoop]: Abstraction has 183 states and 426 transitions. [2021-02-19 18:42:19,194 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 11 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) [2021-02-19 18:42:19,194 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 426 transitions. [2021-02-19 18:42:19,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-19 18:42:19,195 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:42:19,195 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:42:19,416 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:42:19,416 INFO L428 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:42:19,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:42:19,417 INFO L82 PathProgramCache]: Analyzing trace with hash -1054537555, now seen corresponding path program 9 times [2021-02-19 18:42:19,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:42:19,417 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686511442] [2021-02-19 18:42:19,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:42:19,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:42:19,469 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 18:42:19,469 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686511442] [2021-02-19 18:42:19,469 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [152407921] [2021-02-19 18:42:19,469 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 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-02-19 18:42:19,498 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 18:42:19,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:42:19,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 18:42:19,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:42:19,598 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:42:19,598 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:42:19,598 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2021-02-19 18:42:19,598 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361043934] [2021-02-19 18:42:19,599 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-02-19 18:42:19,599 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:42:19,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-02-19 18:42:19,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-02-19 18:42:19,600 INFO L87 Difference]: Start difference. First operand 183 states and 426 transitions. Second operand has 12 states, 12 states have (on average 2.5) internal successors, (30), 11 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) [2021-02-19 18:42:19,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:42:19,839 INFO L93 Difference]: Finished difference Result 302 states and 633 transitions. [2021-02-19 18:42:19,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-02-19 18:42:19,840 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 11 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 20 [2021-02-19 18:42:19,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:42:19,841 INFO L225 Difference]: With dead ends: 302 [2021-02-19 18:42:19,841 INFO L226 Difference]: Without dead ends: 300 [2021-02-19 18:42:19,842 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=168, Invalid=384, Unknown=0, NotChecked=0, Total=552 [2021-02-19 18:42:19,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2021-02-19 18:42:19,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 183. [2021-02-19 18:42:19,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 182 states have (on average 2.3351648351648353) internal successors, (425), 182 states have internal predecessors, (425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:42:19,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 425 transitions. [2021-02-19 18:42:19,848 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 425 transitions. Word has length 20 [2021-02-19 18:42:19,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:42:19,848 INFO L480 AbstractCegarLoop]: Abstraction has 183 states and 425 transitions. [2021-02-19 18:42:19,848 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 11 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) [2021-02-19 18:42:19,849 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 425 transitions. [2021-02-19 18:42:19,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-19 18:42:19,849 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:42:19,849 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:42:20,062 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:42:20,062 INFO L428 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:42:20,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:42:20,063 INFO L82 PathProgramCache]: Analyzing trace with hash -1560883821, now seen corresponding path program 10 times [2021-02-19 18:42:20,063 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:42:20,063 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084726732] [2021-02-19 18:42:20,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:42:20,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:42:20,105 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:42:20,105 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084726732] [2021-02-19 18:42:20,106 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1521678427] [2021-02-19 18:42:20,106 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 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 [2021-02-19 18:42:20,122 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 18:42:20,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:42:20,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 18:42:20,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:42:20,214 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:42:20,215 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:42:20,215 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-02-19 18:42:20,215 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515908538] [2021-02-19 18:42:20,215 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 18:42:20,215 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:42:20,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 18:42:20,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-02-19 18:42:20,217 INFO L87 Difference]: Start difference. First operand 183 states and 425 transitions. Second operand has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 12 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) [2021-02-19 18:42:20,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:42:20,488 INFO L93 Difference]: Finished difference Result 302 states and 642 transitions. [2021-02-19 18:42:20,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-02-19 18:42:20,488 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 12 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 20 [2021-02-19 18:42:20,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:42:20,489 INFO L225 Difference]: With dead ends: 302 [2021-02-19 18:42:20,490 INFO L226 Difference]: Without dead ends: 296 [2021-02-19 18:42:20,490 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=197, Invalid=505, Unknown=0, NotChecked=0, Total=702 [2021-02-19 18:42:20,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2021-02-19 18:42:20,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 198. [2021-02-19 18:42:20,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 197 states have (on average 2.33502538071066) internal successors, (460), 197 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:42:20,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 460 transitions. [2021-02-19 18:42:20,496 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 460 transitions. Word has length 20 [2021-02-19 18:42:20,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:42:20,496 INFO L480 AbstractCegarLoop]: Abstraction has 198 states and 460 transitions. [2021-02-19 18:42:20,496 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 12 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) [2021-02-19 18:42:20,497 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 460 transitions. [2021-02-19 18:42:20,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-02-19 18:42:20,497 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:42:20,497 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:42:20,714 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-02-19 18:42:20,714 INFO L428 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:42:20,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:42:20,714 INFO L82 PathProgramCache]: Analyzing trace with hash -1952850075, now seen corresponding path program 11 times [2021-02-19 18:42:20,714 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:42:20,714 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22945191] [2021-02-19 18:42:20,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:42:20,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:42:20,863 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:42:20,863 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22945191] [2021-02-19 18:42:20,863 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1590712478] [2021-02-19 18:42:20,863 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 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 [2021-02-19 18:42:20,889 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-02-19 18:42:20,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:42:20,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 19 conjunts are in the unsatisfiable core [2021-02-19 18:42:20,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:42:21,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:42:21,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:42:21,070 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:42:21,070 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:42:21,072 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 7 [2021-02-19 18:42:21,073 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:42:21,078 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:42:21,080 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:42:21,080 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:7 [2021-02-19 18:42:21,101 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:42:21,101 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:42:21,101 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-02-19 18:42:21,101 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958870423] [2021-02-19 18:42:21,101 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 18:42:21,101 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:42:21,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 18:42:21,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-02-19 18:42:21,102 INFO L87 Difference]: Start difference. First operand 198 states and 460 transitions. Second operand has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:42:21,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:42:21,228 INFO L93 Difference]: Finished difference Result 282 states and 622 transitions. [2021-02-19 18:42:21,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-19 18:42:21,229 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-02-19 18:42:21,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:42:21,230 INFO L225 Difference]: With dead ends: 282 [2021-02-19 18:42:21,230 INFO L226 Difference]: Without dead ends: 257 [2021-02-19 18:42:21,232 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-02-19 18:42:21,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2021-02-19 18:42:21,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 214. [2021-02-19 18:42:21,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 213 states have (on average 2.3427230046948355) internal successors, (499), 213 states have internal predecessors, (499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:42:21,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 499 transitions. [2021-02-19 18:42:21,242 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 499 transitions. Word has length 22 [2021-02-19 18:42:21,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:42:21,242 INFO L480 AbstractCegarLoop]: Abstraction has 214 states and 499 transitions. [2021-02-19 18:42:21,242 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:42:21,242 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 499 transitions. [2021-02-19 18:42:21,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-02-19 18:42:21,243 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:42:21,243 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:42:21,445 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-02-19 18:42:21,446 INFO L428 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:42:21,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:42:21,446 INFO L82 PathProgramCache]: Analyzing trace with hash 233702447, now seen corresponding path program 12 times [2021-02-19 18:42:21,446 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:42:21,446 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988293566] [2021-02-19 18:42:21,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:42:21,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:42:21,563 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:42:21,563 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988293566] [2021-02-19 18:42:21,563 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1066237974] [2021-02-19 18:42:21,563 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 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 [2021-02-19 18:42:21,589 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-02-19 18:42:21,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:42:21,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 19 conjunts are in the unsatisfiable core [2021-02-19 18:42:21,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:42:21,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:42:21,705 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:42:21,706 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:42:21,706 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 7 [2021-02-19 18:42:21,707 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:42:21,712 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:42:21,714 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:42:21,714 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:7 [2021-02-19 18:42:21,736 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:42:21,736 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:42:21,736 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-02-19 18:42:21,737 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857166759] [2021-02-19 18:42:21,737 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 18:42:21,737 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:42:21,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 18:42:21,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-02-19 18:42:21,739 INFO L87 Difference]: Start difference. First operand 214 states and 499 transitions. Second operand has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 12 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) [2021-02-19 18:42:21,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:42:21,858 INFO L93 Difference]: Finished difference Result 256 states and 583 transitions. [2021-02-19 18:42:21,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-19 18:42:21,859 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 12 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) Word has length 22 [2021-02-19 18:42:21,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:42:21,860 INFO L225 Difference]: With dead ends: 256 [2021-02-19 18:42:21,860 INFO L226 Difference]: Without dead ends: 247 [2021-02-19 18:42:21,862 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-02-19 18:42:21,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2021-02-19 18:42:21,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 222. [2021-02-19 18:42:21,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 221 states have (on average 2.3529411764705883) internal successors, (520), 221 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:42:21,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 520 transitions. [2021-02-19 18:42:21,868 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 520 transitions. Word has length 22 [2021-02-19 18:42:21,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:42:21,868 INFO L480 AbstractCegarLoop]: Abstraction has 222 states and 520 transitions. [2021-02-19 18:42:21,868 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 12 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) [2021-02-19 18:42:21,868 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 520 transitions. [2021-02-19 18:42:21,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-02-19 18:42:21,869 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:42:21,869 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:42:22,086 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-02-19 18:42:22,086 INFO L428 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:42:22,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:42:22,087 INFO L82 PathProgramCache]: Analyzing trace with hash 1784260855, now seen corresponding path program 13 times [2021-02-19 18:42:22,087 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:42:22,087 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229416799] [2021-02-19 18:42:22,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:42:22,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:42:22,211 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:42:22,211 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229416799] [2021-02-19 18:42:22,211 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1160434940] [2021-02-19 18:42:22,211 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 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 [2021-02-19 18:42:22,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:42:22,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 19 conjunts are in the unsatisfiable core [2021-02-19 18:42:22,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:42:22,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:42:22,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:42:22,381 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:42:22,381 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:42:22,382 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 7 [2021-02-19 18:42:22,383 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:42:22,388 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:42:22,389 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:42:22,389 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:7 [2021-02-19 18:42:22,411 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:42:22,411 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:42:22,411 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-02-19 18:42:22,411 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458079020] [2021-02-19 18:42:22,411 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 18:42:22,411 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:42:22,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 18:42:22,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-02-19 18:42:22,412 INFO L87 Difference]: Start difference. First operand 222 states and 520 transitions. Second operand has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:42:22,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:42:22,567 INFO L93 Difference]: Finished difference Result 301 states and 659 transitions. [2021-02-19 18:42:22,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-02-19 18:42:22,567 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-02-19 18:42:22,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:42:22,569 INFO L225 Difference]: With dead ends: 301 [2021-02-19 18:42:22,569 INFO L226 Difference]: Without dead ends: 278 [2021-02-19 18:42:22,570 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-02-19 18:42:22,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2021-02-19 18:42:22,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 227. [2021-02-19 18:42:22,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 226 states have (on average 2.3584070796460175) internal successors, (533), 226 states have internal predecessors, (533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:42:22,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 533 transitions. [2021-02-19 18:42:22,577 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 533 transitions. Word has length 22 [2021-02-19 18:42:22,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:42:22,577 INFO L480 AbstractCegarLoop]: Abstraction has 227 states and 533 transitions. [2021-02-19 18:42:22,577 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:42:22,577 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 533 transitions. [2021-02-19 18:42:22,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-02-19 18:42:22,578 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:42:22,578 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:42:22,795 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:42:22,795 INFO L428 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:42:22,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:42:22,796 INFO L82 PathProgramCache]: Analyzing trace with hash 379944371, now seen corresponding path program 14 times [2021-02-19 18:42:22,796 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:42:22,796 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115462778] [2021-02-19 18:42:22,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:42:22,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:42:22,889 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:42:22,890 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115462778] [2021-02-19 18:42:22,890 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1915536112] [2021-02-19 18:42:22,890 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 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 [2021-02-19 18:42:22,906 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 18:42:22,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:42:22,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 19 conjunts are in the unsatisfiable core [2021-02-19 18:42:22,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:42:23,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:42:23,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:42:23,030 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:42:23,031 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:42:23,031 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 7 [2021-02-19 18:42:23,032 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:42:23,038 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:42:23,039 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:42:23,039 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:7 [2021-02-19 18:42:23,061 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:42:23,061 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:42:23,061 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-02-19 18:42:23,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141011142] [2021-02-19 18:42:23,062 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 18:42:23,062 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:42:23,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 18:42:23,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-02-19 18:42:23,063 INFO L87 Difference]: Start difference. First operand 227 states and 533 transitions. Second operand has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 12 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) [2021-02-19 18:42:23,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:42:23,191 INFO L93 Difference]: Finished difference Result 320 states and 703 transitions. [2021-02-19 18:42:23,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-19 18:42:23,191 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 12 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) Word has length 22 [2021-02-19 18:42:23,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:42:23,193 INFO L225 Difference]: With dead ends: 320 [2021-02-19 18:42:23,193 INFO L226 Difference]: Without dead ends: 313 [2021-02-19 18:42:23,194 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-02-19 18:42:23,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2021-02-19 18:42:23,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 246. [2021-02-19 18:42:23,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 245 states have (on average 2.363265306122449) internal successors, (579), 245 states have internal predecessors, (579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:42:23,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 579 transitions. [2021-02-19 18:42:23,201 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 579 transitions. Word has length 22 [2021-02-19 18:42:23,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:42:23,201 INFO L480 AbstractCegarLoop]: Abstraction has 246 states and 579 transitions. [2021-02-19 18:42:23,201 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 12 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) [2021-02-19 18:42:23,202 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 579 transitions. [2021-02-19 18:42:23,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-02-19 18:42:23,202 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:42:23,203 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:42:23,418 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:42:23,418 INFO L428 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:42:23,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:42:23,418 INFO L82 PathProgramCache]: Analyzing trace with hash -1215355933, now seen corresponding path program 15 times [2021-02-19 18:42:23,418 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:42:23,418 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519769594] [2021-02-19 18:42:23,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:42:23,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:42:23,492 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:42:23,492 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519769594] [2021-02-19 18:42:23,492 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1294955537] [2021-02-19 18:42:23,492 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 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 [2021-02-19 18:42:23,509 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-02-19 18:42:23,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:42:23,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 9 conjunts are in the unsatisfiable core [2021-02-19 18:42:23,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:42:23,669 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:42:23,669 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:42:23,669 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-02-19 18:42:23,669 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339636491] [2021-02-19 18:42:23,670 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 18:42:23,670 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:42:23,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 18:42:23,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2021-02-19 18:42:23,671 INFO L87 Difference]: Start difference. First operand 246 states and 579 transitions. Second operand has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:42:24,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:42:24,159 INFO L93 Difference]: Finished difference Result 495 states and 1055 transitions. [2021-02-19 18:42:24,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-02-19 18:42:24,160 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-02-19 18:42:24,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:42:24,162 INFO L225 Difference]: With dead ends: 495 [2021-02-19 18:42:24,162 INFO L226 Difference]: Without dead ends: 495 [2021-02-19 18:42:24,162 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=402, Invalid=1080, Unknown=0, NotChecked=0, Total=1482 [2021-02-19 18:42:24,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2021-02-19 18:42:24,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 238. [2021-02-19 18:42:24,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 237 states have (on average 2.3628691983122363) internal successors, (560), 237 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:42:24,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 560 transitions. [2021-02-19 18:42:24,169 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 560 transitions. Word has length 24 [2021-02-19 18:42:24,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:42:24,169 INFO L480 AbstractCegarLoop]: Abstraction has 238 states and 560 transitions. [2021-02-19 18:42:24,169 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:42:24,169 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 560 transitions. [2021-02-19 18:42:24,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-02-19 18:42:24,170 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:42:24,170 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:42:24,386 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:42:24,386 INFO L428 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:42:24,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:42:24,387 INFO L82 PathProgramCache]: Analyzing trace with hash 1671479399, now seen corresponding path program 16 times [2021-02-19 18:42:24,387 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:42:24,387 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742662566] [2021-02-19 18:42:24,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:42:24,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:42:24,455 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:42:24,455 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742662566] [2021-02-19 18:42:24,455 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [357465041] [2021-02-19 18:42:24,455 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 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 [2021-02-19 18:42:24,471 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 18:42:24,472 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:42:24,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 9 conjunts are in the unsatisfiable core [2021-02-19 18:42:24,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:42:24,614 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:42:24,614 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:42:24,614 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-02-19 18:42:24,614 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604919019] [2021-02-19 18:42:24,614 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 18:42:24,615 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:42:24,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 18:42:24,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2021-02-19 18:42:24,615 INFO L87 Difference]: Start difference. First operand 238 states and 560 transitions. Second operand has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 16 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:42:25,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:42:25,196 INFO L93 Difference]: Finished difference Result 696 states and 1431 transitions. [2021-02-19 18:42:25,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-02-19 18:42:25,197 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 16 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-02-19 18:42:25,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:42:25,199 INFO L225 Difference]: With dead ends: 696 [2021-02-19 18:42:25,199 INFO L226 Difference]: Without dead ends: 652 [2021-02-19 18:42:25,200 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 455 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=449, Invalid=1357, Unknown=0, NotChecked=0, Total=1806 [2021-02-19 18:42:25,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 652 states. [2021-02-19 18:42:25,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 652 to 294. [2021-02-19 18:42:25,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 293 states have (on average 2.378839590443686) internal successors, (697), 293 states have internal predecessors, (697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:42:25,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 697 transitions. [2021-02-19 18:42:25,210 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 697 transitions. Word has length 24 [2021-02-19 18:42:25,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:42:25,210 INFO L480 AbstractCegarLoop]: Abstraction has 294 states and 697 transitions. [2021-02-19 18:42:25,210 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 16 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:42:25,210 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 697 transitions. [2021-02-19 18:42:25,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-02-19 18:42:25,211 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:42:25,211 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:42:25,432 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-02-19 18:42:25,432 INFO L428 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:42:25,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:42:25,433 INFO L82 PathProgramCache]: Analyzing trace with hash -766887897, now seen corresponding path program 17 times [2021-02-19 18:42:25,433 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:42:25,433 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382913459] [2021-02-19 18:42:25,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:42:25,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:42:25,480 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:42:25,480 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382913459] [2021-02-19 18:42:25,480 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [411126998] [2021-02-19 18:42:25,480 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 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 [2021-02-19 18:42:25,496 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-02-19 18:42:25,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:42:25,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 9 conjunts are in the unsatisfiable core [2021-02-19 18:42:25,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:42:25,627 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:42:25,628 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:42:25,628 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 14 [2021-02-19 18:42:25,628 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634473769] [2021-02-19 18:42:25,628 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 18:42:25,628 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:42:25,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 18:42:25,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-02-19 18:42:25,629 INFO L87 Difference]: Start difference. First operand 294 states and 697 transitions. Second operand has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:42:26,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:42:26,170 INFO L93 Difference]: Finished difference Result 654 states and 1426 transitions. [2021-02-19 18:42:26,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-02-19 18:42:26,171 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-02-19 18:42:26,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:42:26,173 INFO L225 Difference]: With dead ends: 654 [2021-02-19 18:42:26,173 INFO L226 Difference]: Without dead ends: 652 [2021-02-19 18:42:26,174 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=387, Invalid=945, Unknown=0, NotChecked=0, Total=1332 [2021-02-19 18:42:26,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 652 states. [2021-02-19 18:42:26,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 652 to 362. [2021-02-19 18:42:26,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 362 states, 361 states have (on average 2.4238227146814406) internal successors, (875), 361 states have internal predecessors, (875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:42:26,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 362 states to 362 states and 875 transitions. [2021-02-19 18:42:26,186 INFO L78 Accepts]: Start accepts. Automaton has 362 states and 875 transitions. Word has length 24 [2021-02-19 18:42:26,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:42:26,187 INFO L480 AbstractCegarLoop]: Abstraction has 362 states and 875 transitions. [2021-02-19 18:42:26,187 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:42:26,187 INFO L276 IsEmpty]: Start isEmpty. Operand 362 states and 875 transitions. [2021-02-19 18:42:26,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-02-19 18:42:26,187 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:42:26,188 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:42:26,403 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-02-19 18:42:26,403 INFO L428 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:42:26,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:42:26,404 INFO L82 PathProgramCache]: Analyzing trace with hash -1098566685, now seen corresponding path program 18 times [2021-02-19 18:42:26,404 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:42:26,404 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714488238] [2021-02-19 18:42:26,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:42:26,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:42:26,444 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:42:26,444 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714488238] [2021-02-19 18:42:26,444 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1699143077] [2021-02-19 18:42:26,444 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 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 [2021-02-19 18:42:26,466 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-02-19 18:42:26,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:42:26,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 9 conjunts are in the unsatisfiable core [2021-02-19 18:42:26,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:42:26,582 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:42:26,583 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:42:26,583 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 14 [2021-02-19 18:42:26,583 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706804450] [2021-02-19 18:42:26,583 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 18:42:26,583 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:42:26,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 18:42:26,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2021-02-19 18:42:26,584 INFO L87 Difference]: Start difference. First operand 362 states and 875 transitions. Second operand has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:42:27,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:42:27,026 INFO L93 Difference]: Finished difference Result 539 states and 1206 transitions. [2021-02-19 18:42:27,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-02-19 18:42:27,030 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-02-19 18:42:27,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:42:27,032 INFO L225 Difference]: With dead ends: 539 [2021-02-19 18:42:27,032 INFO L226 Difference]: Without dead ends: 535 [2021-02-19 18:42:27,033 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=356, Invalid=976, Unknown=0, NotChecked=0, Total=1332 [2021-02-19 18:42:27,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 535 states. [2021-02-19 18:42:27,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 535 to 362. [2021-02-19 18:42:27,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 362 states, 361 states have (on average 2.4210526315789473) internal successors, (874), 361 states have internal predecessors, (874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:42:27,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 362 states to 362 states and 874 transitions. [2021-02-19 18:42:27,042 INFO L78 Accepts]: Start accepts. Automaton has 362 states and 874 transitions. Word has length 24 [2021-02-19 18:42:27,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:42:27,043 INFO L480 AbstractCegarLoop]: Abstraction has 362 states and 874 transitions. [2021-02-19 18:42:27,043 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:42:27,043 INFO L276 IsEmpty]: Start isEmpty. Operand 362 states and 874 transitions. [2021-02-19 18:42:27,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-02-19 18:42:27,044 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:42:27,044 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:42:27,264 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-02-19 18:42:27,265 INFO L428 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:42:27,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:42:27,265 INFO L82 PathProgramCache]: Analyzing trace with hash -1585521999, now seen corresponding path program 19 times [2021-02-19 18:42:27,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:42:27,265 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156638179] [2021-02-19 18:42:27,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:42:27,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:42:27,314 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 18:42:27,315 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156638179] [2021-02-19 18:42:27,315 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1182371375] [2021-02-19 18:42:27,315 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 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 [2021-02-19 18:42:27,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:42:27,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 9 conjunts are in the unsatisfiable core [2021-02-19 18:42:27,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:42:27,472 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:42:27,472 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:42:27,472 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 14 [2021-02-19 18:42:27,473 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130385393] [2021-02-19 18:42:27,473 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 18:42:27,473 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:42:27,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 18:42:27,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-02-19 18:42:27,474 INFO L87 Difference]: Start difference. First operand 362 states and 874 transitions. Second operand has 15 states, 15 states have (on average 2.6) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:42:27,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:42:27,828 INFO L93 Difference]: Finished difference Result 593 states and 1318 transitions. [2021-02-19 18:42:27,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-02-19 18:42:27,829 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-02-19 18:42:27,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:42:27,831 INFO L225 Difference]: With dead ends: 593 [2021-02-19 18:42:27,831 INFO L226 Difference]: Without dead ends: 584 [2021-02-19 18:42:27,831 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=235, Invalid=695, Unknown=0, NotChecked=0, Total=930 [2021-02-19 18:42:27,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 584 states. [2021-02-19 18:42:27,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 584 to 383. [2021-02-19 18:42:27,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 383 states, 382 states have (on average 2.4424083769633507) internal successors, (933), 382 states have internal predecessors, (933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:42:27,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383 states to 383 states and 933 transitions. [2021-02-19 18:42:27,842 INFO L78 Accepts]: Start accepts. Automaton has 383 states and 933 transitions. Word has length 24 [2021-02-19 18:42:27,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:42:27,842 INFO L480 AbstractCegarLoop]: Abstraction has 383 states and 933 transitions. [2021-02-19 18:42:27,842 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:42:27,842 INFO L276 IsEmpty]: Start isEmpty. Operand 383 states and 933 transitions. [2021-02-19 18:42:27,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-02-19 18:42:27,843 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:42:27,843 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:42:28,055 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-02-19 18:42:28,056 INFO L428 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:42:28,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:42:28,056 INFO L82 PathProgramCache]: Analyzing trace with hash -1140988977, now seen corresponding path program 20 times [2021-02-19 18:42:28,056 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:42:28,056 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171308805] [2021-02-19 18:42:28,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:42:28,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:42:28,109 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:42:28,110 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171308805] [2021-02-19 18:42:28,110 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [327914132] [2021-02-19 18:42:28,110 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 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-02-19 18:42:28,144 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 18:42:28,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:42:28,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 9 conjunts are in the unsatisfiable core [2021-02-19 18:42:28,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:42:28,267 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:42:28,267 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:42:28,267 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-02-19 18:42:28,268 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048866170] [2021-02-19 18:42:28,268 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-19 18:42:28,268 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:42:28,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-19 18:42:28,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2021-02-19 18:42:28,268 INFO L87 Difference]: Start difference. First operand 383 states and 933 transitions. Second operand has 16 states, 16 states have (on average 2.375) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:42:28,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:42:28,748 INFO L93 Difference]: Finished difference Result 701 states and 1556 transitions. [2021-02-19 18:42:28,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-02-19 18:42:28,749 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-02-19 18:42:28,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:42:28,751 INFO L225 Difference]: With dead ends: 701 [2021-02-19 18:42:28,751 INFO L226 Difference]: Without dead ends: 687 [2021-02-19 18:42:28,752 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 379 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=382, Invalid=1100, Unknown=0, NotChecked=0, Total=1482 [2021-02-19 18:42:28,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 687 states. [2021-02-19 18:42:28,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 687 to 386. [2021-02-19 18:42:28,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 386 states, 385 states have (on average 2.4363636363636365) internal successors, (938), 385 states have internal predecessors, (938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:42:28,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 386 states to 386 states and 938 transitions. [2021-02-19 18:42:28,763 INFO L78 Accepts]: Start accepts. Automaton has 386 states and 938 transitions. Word has length 24 [2021-02-19 18:42:28,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:42:28,763 INFO L480 AbstractCegarLoop]: Abstraction has 386 states and 938 transitions. [2021-02-19 18:42:28,763 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:42:28,763 INFO L276 IsEmpty]: Start isEmpty. Operand 386 states and 938 transitions. [2021-02-19 18:42:28,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-02-19 18:42:28,764 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:42:28,764 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:42:28,984 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-02-19 18:42:28,985 INFO L428 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:42:28,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:42:28,985 INFO L82 PathProgramCache]: Analyzing trace with hash 1532261625, now seen corresponding path program 21 times [2021-02-19 18:42:28,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:42:28,985 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376447319] [2021-02-19 18:42:28,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:42:28,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:42:29,044 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 18:42:29,045 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376447319] [2021-02-19 18:42:29,045 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [948333780] [2021-02-19 18:42:29,045 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 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 [2021-02-19 18:42:29,061 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-02-19 18:42:29,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:42:29,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 9 conjunts are in the unsatisfiable core [2021-02-19 18:42:29,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:42:29,172 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:42:29,172 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:42:29,172 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-02-19 18:42:29,172 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254947268] [2021-02-19 18:42:29,173 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 18:42:29,173 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:42:29,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 18:42:29,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-02-19 18:42:29,174 INFO L87 Difference]: Start difference. First operand 386 states and 938 transitions. Second operand has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:42:29,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:42:29,602 INFO L93 Difference]: Finished difference Result 817 states and 1787 transitions. [2021-02-19 18:42:29,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-02-19 18:42:29,603 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-02-19 18:42:29,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:42:29,605 INFO L225 Difference]: With dead ends: 817 [2021-02-19 18:42:29,605 INFO L226 Difference]: Without dead ends: 817 [2021-02-19 18:42:29,606 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 364 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=414, Invalid=1068, Unknown=0, NotChecked=0, Total=1482 [2021-02-19 18:42:29,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 817 states. [2021-02-19 18:42:29,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 817 to 408. [2021-02-19 18:42:29,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 408 states, 407 states have (on average 2.407862407862408) internal successors, (980), 407 states have internal predecessors, (980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:42:29,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 980 transitions. [2021-02-19 18:42:29,617 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 980 transitions. Word has length 24 [2021-02-19 18:42:29,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:42:29,617 INFO L480 AbstractCegarLoop]: Abstraction has 408 states and 980 transitions. [2021-02-19 18:42:29,617 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:42:29,617 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 980 transitions. [2021-02-19 18:42:29,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-02-19 18:42:29,618 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:42:29,618 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:42:29,833 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:42:29,834 INFO L428 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:42:29,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:42:29,834 INFO L82 PathProgramCache]: Analyzing trace with hash -1852543623, now seen corresponding path program 22 times [2021-02-19 18:42:29,834 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:42:29,834 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722192507] [2021-02-19 18:42:29,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:42:29,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:42:29,882 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 18:42:29,882 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722192507] [2021-02-19 18:42:29,882 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [596476273] [2021-02-19 18:42:29,882 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 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 [2021-02-19 18:42:29,923 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 18:42:29,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:42:29,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 9 conjunts are in the unsatisfiable core [2021-02-19 18:42:29,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:42:30,031 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:42:30,031 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:42:30,031 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-02-19 18:42:30,031 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058169470] [2021-02-19 18:42:30,031 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-19 18:42:30,031 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:42:30,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-19 18:42:30,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-02-19 18:42:30,032 INFO L87 Difference]: Start difference. First operand 408 states and 980 transitions. Second operand has 16 states, 16 states have (on average 2.375) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:42:30,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:42:30,416 INFO L93 Difference]: Finished difference Result 578 states and 1266 transitions. [2021-02-19 18:42:30,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-02-19 18:42:30,416 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-02-19 18:42:30,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:42:30,417 INFO L225 Difference]: With dead ends: 578 [2021-02-19 18:42:30,418 INFO L226 Difference]: Without dead ends: 560 [2021-02-19 18:42:30,418 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 307 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=286, Invalid=904, Unknown=0, NotChecked=0, Total=1190 [2021-02-19 18:42:30,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 560 states. [2021-02-19 18:42:30,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 560 to 408. [2021-02-19 18:42:30,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 408 states, 407 states have (on average 2.398034398034398) internal successors, (976), 407 states have internal predecessors, (976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:42:30,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 976 transitions. [2021-02-19 18:42:30,427 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 976 transitions. Word has length 24 [2021-02-19 18:42:30,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:42:30,427 INFO L480 AbstractCegarLoop]: Abstraction has 408 states and 976 transitions. [2021-02-19 18:42:30,427 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:42:30,427 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 976 transitions. [2021-02-19 18:42:30,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-02-19 18:42:30,428 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:42:30,428 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:42:30,649 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-02-19 18:42:30,649 INFO L428 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:42:30,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:42:30,649 INFO L82 PathProgramCache]: Analyzing trace with hash -77993291, now seen corresponding path program 23 times [2021-02-19 18:42:30,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:42:30,649 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590580844] [2021-02-19 18:42:30,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:42:30,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:42:30,698 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 18:42:30,698 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590580844] [2021-02-19 18:42:30,698 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1176463942] [2021-02-19 18:42:30,698 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 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 [2021-02-19 18:42:30,718 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-02-19 18:42:30,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:42:30,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 9 conjunts are in the unsatisfiable core [2021-02-19 18:42:30,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:42:30,846 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:42:30,847 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:42:30,847 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-02-19 18:42:30,847 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748429748] [2021-02-19 18:42:30,847 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-19 18:42:30,847 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:42:30,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-19 18:42:30,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-02-19 18:42:30,848 INFO L87 Difference]: Start difference. First operand 408 states and 976 transitions. Second operand has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:42:31,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:42:31,354 INFO L93 Difference]: Finished difference Result 943 states and 2146 transitions. [2021-02-19 18:42:31,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-02-19 18:42:31,354 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-02-19 18:42:31,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:42:31,357 INFO L225 Difference]: With dead ends: 943 [2021-02-19 18:42:31,357 INFO L226 Difference]: Without dead ends: 943 [2021-02-19 18:42:31,358 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 493 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=520, Invalid=1202, Unknown=0, NotChecked=0, Total=1722 [2021-02-19 18:42:31,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 943 states. [2021-02-19 18:42:31,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 943 to 633. [2021-02-19 18:42:31,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 633 states, 632 states have (on average 2.4857594936708862) internal successors, (1571), 632 states have internal predecessors, (1571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:42:31,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 633 states to 633 states and 1571 transitions. [2021-02-19 18:42:31,374 INFO L78 Accepts]: Start accepts. Automaton has 633 states and 1571 transitions. Word has length 24 [2021-02-19 18:42:31,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:42:31,374 INFO L480 AbstractCegarLoop]: Abstraction has 633 states and 1571 transitions. [2021-02-19 18:42:31,375 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:42:31,375 INFO L276 IsEmpty]: Start isEmpty. Operand 633 states and 1571 transitions. [2021-02-19 18:42:31,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-02-19 18:42:31,376 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:42:31,376 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:42:31,589 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:42:31,590 INFO L428 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:42:31,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:42:31,590 INFO L82 PathProgramCache]: Analyzing trace with hash -1830074515, now seen corresponding path program 24 times [2021-02-19 18:42:31,590 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:42:31,590 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474875020] [2021-02-19 18:42:31,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:42:31,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:42:31,635 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 18:42:31,635 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474875020] [2021-02-19 18:42:31,635 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1630178645] [2021-02-19 18:42:31,635 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 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-02-19 18:42:31,656 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-02-19 18:42:31,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:42:31,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 9 conjunts are in the unsatisfiable core [2021-02-19 18:42:31,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:42:31,789 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:42:31,790 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:42:31,790 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 14 [2021-02-19 18:42:31,790 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556515220] [2021-02-19 18:42:31,790 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 18:42:31,790 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:42:31,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 18:42:31,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-02-19 18:42:31,792 INFO L87 Difference]: Start difference. First operand 633 states and 1571 transitions. Second operand has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:42:32,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:42:32,190 INFO L93 Difference]: Finished difference Result 910 states and 2079 transitions. [2021-02-19 18:42:32,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-02-19 18:42:32,190 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-02-19 18:42:32,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:42:32,193 INFO L225 Difference]: With dead ends: 910 [2021-02-19 18:42:32,193 INFO L226 Difference]: Without dead ends: 906 [2021-02-19 18:42:32,193 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 295 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=342, Invalid=848, Unknown=0, NotChecked=0, Total=1190 [2021-02-19 18:42:32,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 906 states. [2021-02-19 18:42:32,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 906 to 633. [2021-02-19 18:42:32,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 633 states, 632 states have (on average 2.481012658227848) internal successors, (1568), 632 states have internal predecessors, (1568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:42:32,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 633 states to 633 states and 1568 transitions. [2021-02-19 18:42:32,207 INFO L78 Accepts]: Start accepts. Automaton has 633 states and 1568 transitions. Word has length 24 [2021-02-19 18:42:32,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:42:32,207 INFO L480 AbstractCegarLoop]: Abstraction has 633 states and 1568 transitions. [2021-02-19 18:42:32,207 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:42:32,207 INFO L276 IsEmpty]: Start isEmpty. Operand 633 states and 1568 transitions. [2021-02-19 18:42:32,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-02-19 18:42:32,208 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:42:32,208 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:42:32,422 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-02-19 18:42:32,422 INFO L428 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:42:32,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:42:32,422 INFO L82 PathProgramCache]: Analyzing trace with hash 1958546515, now seen corresponding path program 25 times [2021-02-19 18:42:32,422 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:42:32,422 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936418157] [2021-02-19 18:42:32,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:42:32,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:42:32,477 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 18:42:32,477 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936418157] [2021-02-19 18:42:32,477 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1490949029] [2021-02-19 18:42:32,477 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 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-02-19 18:42:32,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:42:32,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 9 conjunts are in the unsatisfiable core [2021-02-19 18:42:32,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:42:32,629 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:42:32,629 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:42:32,629 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-02-19 18:42:32,630 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095630349] [2021-02-19 18:42:32,630 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-19 18:42:32,630 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:42:32,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-19 18:42:32,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-02-19 18:42:32,631 INFO L87 Difference]: Start difference. First operand 633 states and 1568 transitions. Second operand has 16 states, 16 states have (on average 2.375) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:42:33,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:42:33,053 INFO L93 Difference]: Finished difference Result 997 states and 2276 transitions. [2021-02-19 18:42:33,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-02-19 18:42:33,053 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-02-19 18:42:33,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:42:33,056 INFO L225 Difference]: With dead ends: 997 [2021-02-19 18:42:33,056 INFO L226 Difference]: Without dead ends: 985 [2021-02-19 18:42:33,056 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 343 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=355, Invalid=977, Unknown=0, NotChecked=0, Total=1332 [2021-02-19 18:42:33,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 985 states. [2021-02-19 18:42:33,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 985 to 684. [2021-02-19 18:42:33,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 684 states, 683 states have (on average 2.4963396778916547) internal successors, (1705), 683 states have internal predecessors, (1705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:42:33,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 684 states to 684 states and 1705 transitions. [2021-02-19 18:42:33,070 INFO L78 Accepts]: Start accepts. Automaton has 684 states and 1705 transitions. Word has length 24 [2021-02-19 18:42:33,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:42:33,070 INFO L480 AbstractCegarLoop]: Abstraction has 684 states and 1705 transitions. [2021-02-19 18:42:33,071 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:42:33,071 INFO L276 IsEmpty]: Start isEmpty. Operand 684 states and 1705 transitions. [2021-02-19 18:42:33,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-02-19 18:42:33,072 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:42:33,072 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:42:33,285 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:42:33,285 INFO L428 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:42:33,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:42:33,285 INFO L82 PathProgramCache]: Analyzing trace with hash 1731325135, now seen corresponding path program 26 times [2021-02-19 18:42:33,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:42:33,285 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519257451] [2021-02-19 18:42:33,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:42:33,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:42:33,336 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:42:33,336 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519257451] [2021-02-19 18:42:33,336 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1121783996] [2021-02-19 18:42:33,336 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 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 [2021-02-19 18:42:33,352 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 18:42:33,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:42:33,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 9 conjunts are in the unsatisfiable core [2021-02-19 18:42:33,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:42:33,462 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:42:33,463 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:42:33,463 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-02-19 18:42:33,463 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618327292] [2021-02-19 18:42:33,463 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 18:42:33,463 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:42:33,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 18:42:33,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2021-02-19 18:42:33,464 INFO L87 Difference]: Start difference. First operand 684 states and 1705 transitions. Second operand has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:42:33,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:42:33,903 INFO L93 Difference]: Finished difference Result 1028 states and 2383 transitions. [2021-02-19 18:42:33,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-02-19 18:42:33,903 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-02-19 18:42:33,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:42:33,907 INFO L225 Difference]: With dead ends: 1028 [2021-02-19 18:42:33,907 INFO L226 Difference]: Without dead ends: 1008 [2021-02-19 18:42:33,907 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 444 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=419, Invalid=1221, Unknown=0, NotChecked=0, Total=1640 [2021-02-19 18:42:33,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1008 states. [2021-02-19 18:42:33,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1008 to 740. [2021-02-19 18:42:33,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 740 states, 739 states have (on average 2.5087956698240865) internal successors, (1854), 739 states have internal predecessors, (1854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:42:33,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 740 states to 740 states and 1854 transitions. [2021-02-19 18:42:33,938 INFO L78 Accepts]: Start accepts. Automaton has 740 states and 1854 transitions. Word has length 24 [2021-02-19 18:42:33,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:42:33,938 INFO L480 AbstractCegarLoop]: Abstraction has 740 states and 1854 transitions. [2021-02-19 18:42:33,938 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:42:33,938 INFO L276 IsEmpty]: Start isEmpty. Operand 740 states and 1854 transitions. [2021-02-19 18:42:33,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-02-19 18:42:33,940 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:42:33,940 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:42:34,159 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-02-19 18:42:34,160 INFO L428 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:42:34,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:42:34,160 INFO L82 PathProgramCache]: Analyzing trace with hash 1733746021, now seen corresponding path program 27 times [2021-02-19 18:42:34,160 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:42:34,160 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430827299] [2021-02-19 18:42:34,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:42:34,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:42:34,433 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:42:34,433 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430827299] [2021-02-19 18:42:34,433 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2047570743] [2021-02-19 18:42:34,433 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 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 [2021-02-19 18:42:34,450 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-02-19 18:42:34,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:42:34,451 WARN L261 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 31 conjunts are in the unsatisfiable core [2021-02-19 18:42:34,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:42:34,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:42:34,994 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:42:34,995 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:42:35,023 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:42:35,023 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 49 treesize of output 55 [2021-02-19 18:42:35,065 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-02-19 18:42:35,112 INFO L628 ElimStorePlain]: treesize reduction 52, result has 40.2 percent of original size [2021-02-19 18:42:35,122 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 18:42:35,122 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:71, output treesize:22 [2021-02-19 18:42:35,189 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:42:35,190 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:42:35,190 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 25 [2021-02-19 18:42:35,190 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789290703] [2021-02-19 18:42:35,190 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-02-19 18:42:35,190 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:42:35,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-02-19 18:42:35,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=555, Unknown=0, NotChecked=0, Total=650 [2021-02-19 18:42:35,191 INFO L87 Difference]: Start difference. First operand 740 states and 1854 transitions. Second operand has 26 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 25 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:42:36,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:42:36,495 INFO L93 Difference]: Finished difference Result 1044 states and 2520 transitions. [2021-02-19 18:42:36,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-02-19 18:42:36,495 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 25 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-02-19 18:42:36,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:42:36,499 INFO L225 Difference]: With dead ends: 1044 [2021-02-19 18:42:36,499 INFO L226 Difference]: Without dead ends: 1030 [2021-02-19 18:42:36,499 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 438 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=273, Invalid=1619, Unknown=0, NotChecked=0, Total=1892 [2021-02-19 18:42:36,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1030 states. [2021-02-19 18:42:36,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1030 to 756. [2021-02-19 18:42:36,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 756 states, 755 states have (on average 2.508609271523179) internal successors, (1894), 755 states have internal predecessors, (1894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:42:36,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 756 states to 756 states and 1894 transitions. [2021-02-19 18:42:36,513 INFO L78 Accepts]: Start accepts. Automaton has 756 states and 1894 transitions. Word has length 26 [2021-02-19 18:42:36,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:42:36,513 INFO L480 AbstractCegarLoop]: Abstraction has 756 states and 1894 transitions. [2021-02-19 18:42:36,513 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 25 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:42:36,513 INFO L276 IsEmpty]: Start isEmpty. Operand 756 states and 1894 transitions. [2021-02-19 18:42:36,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-02-19 18:42:36,514 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:42:36,514 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:42:36,735 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:42:36,735 INFO L428 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:42:36,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:42:36,736 INFO L82 PathProgramCache]: Analyzing trace with hash -800783629, now seen corresponding path program 28 times [2021-02-19 18:42:36,736 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:42:36,736 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705434850] [2021-02-19 18:42:36,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:42:36,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:42:37,018 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:42:37,018 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705434850] [2021-02-19 18:42:37,018 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [219743844] [2021-02-19 18:42:37,018 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 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 [2021-02-19 18:42:37,051 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 18:42:37,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:42:37,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 27 conjunts are in the unsatisfiable core [2021-02-19 18:42:37,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:42:37,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:42:37,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:42:37,277 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:42:37,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:42:37,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:42:37,279 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:42:37,280 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:42:37,281 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 7 [2021-02-19 18:42:37,282 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:42:37,288 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:42:37,289 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:42:37,289 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:59, output treesize:7 [2021-02-19 18:42:37,311 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:42:37,311 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:42:37,311 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 20 [2021-02-19 18:42:37,311 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673504398] [2021-02-19 18:42:37,311 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-02-19 18:42:37,312 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:42:37,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-02-19 18:42:37,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2021-02-19 18:42:37,312 INFO L87 Difference]: Start difference. First operand 756 states and 1894 transitions. Second operand has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:42:38,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:42:38,323 INFO L93 Difference]: Finished difference Result 1114 states and 2686 transitions. [2021-02-19 18:42:38,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-02-19 18:42:38,324 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-02-19 18:42:38,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:42:38,326 INFO L225 Difference]: With dead ends: 1114 [2021-02-19 18:42:38,326 INFO L226 Difference]: Without dead ends: 1066 [2021-02-19 18:42:38,327 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 333 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=251, Invalid=1309, Unknown=0, NotChecked=0, Total=1560 [2021-02-19 18:42:38,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1066 states. [2021-02-19 18:42:38,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1066 to 785. [2021-02-19 18:42:38,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 785 states, 784 states have (on average 2.489795918367347) internal successors, (1952), 784 states have internal predecessors, (1952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:42:38,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 785 states to 785 states and 1952 transitions. [2021-02-19 18:42:38,339 INFO L78 Accepts]: Start accepts. Automaton has 785 states and 1952 transitions. Word has length 26 [2021-02-19 18:42:38,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:42:38,339 INFO L480 AbstractCegarLoop]: Abstraction has 785 states and 1952 transitions. [2021-02-19 18:42:38,340 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:42:38,340 INFO L276 IsEmpty]: Start isEmpty. Operand 785 states and 1952 transitions. [2021-02-19 18:42:38,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-02-19 18:42:38,341 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:42:38,341 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:42:38,562 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-02-19 18:42:38,562 INFO L428 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:42:38,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:42:38,562 INFO L82 PathProgramCache]: Analyzing trace with hash 701688683, now seen corresponding path program 29 times [2021-02-19 18:42:38,562 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:42:38,563 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057045362] [2021-02-19 18:42:38,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:42:38,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:42:38,803 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:42:38,803 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057045362] [2021-02-19 18:42:38,803 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [169434844] [2021-02-19 18:42:38,803 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 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 [2021-02-19 18:42:38,826 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-02-19 18:42:38,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:42:38,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 27 conjunts are in the unsatisfiable core [2021-02-19 18:42:38,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:42:39,036 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:42:39,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:42:39,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:42:39,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:42:39,040 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:42:39,040 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:42:39,041 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 7 [2021-02-19 18:42:39,042 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:42:39,048 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:42:39,049 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:42:39,049 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:59, output treesize:7 [2021-02-19 18:42:39,077 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:42:39,077 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:42:39,077 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 20 [2021-02-19 18:42:39,077 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892622074] [2021-02-19 18:42:39,077 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-02-19 18:42:39,078 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:42:39,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-02-19 18:42:39,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2021-02-19 18:42:39,078 INFO L87 Difference]: Start difference. First operand 785 states and 1952 transitions. Second operand has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:42:40,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:42:40,450 INFO L93 Difference]: Finished difference Result 1322 states and 3150 transitions. [2021-02-19 18:42:40,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-02-19 18:42:40,451 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-02-19 18:42:40,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:42:40,454 INFO L225 Difference]: With dead ends: 1322 [2021-02-19 18:42:40,454 INFO L226 Difference]: Without dead ends: 1313 [2021-02-19 18:42:40,455 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 602 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=369, Invalid=2081, Unknown=0, NotChecked=0, Total=2450 [2021-02-19 18:42:40,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1313 states. [2021-02-19 18:42:40,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1313 to 825. [2021-02-19 18:42:40,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 825 states, 824 states have (on average 2.491504854368932) internal successors, (2053), 824 states have internal predecessors, (2053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:42:40,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 825 states to 825 states and 2053 transitions. [2021-02-19 18:42:40,471 INFO L78 Accepts]: Start accepts. Automaton has 825 states and 2053 transitions. Word has length 26 [2021-02-19 18:42:40,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:42:40,472 INFO L480 AbstractCegarLoop]: Abstraction has 825 states and 2053 transitions. [2021-02-19 18:42:40,472 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:42:40,472 INFO L276 IsEmpty]: Start isEmpty. Operand 825 states and 2053 transitions. [2021-02-19 18:42:40,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-02-19 18:42:40,473 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:42:40,474 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:42:40,694 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:42:40,694 INFO L428 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:42:40,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:42:40,694 INFO L82 PathProgramCache]: Analyzing trace with hash 1576280115, now seen corresponding path program 30 times [2021-02-19 18:42:40,694 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:42:40,695 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937304296] [2021-02-19 18:42:40,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:42:40,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:42:40,902 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:42:40,903 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937304296] [2021-02-19 18:42:40,903 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2005767036] [2021-02-19 18:42:40,903 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 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 [2021-02-19 18:42:40,920 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-02-19 18:42:40,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:42:40,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 27 conjunts are in the unsatisfiable core [2021-02-19 18:42:40,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:42:41,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:42:41,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:42:41,110 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:42:41,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:42:41,112 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:42:41,112 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:42:41,113 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 7 [2021-02-19 18:42:41,114 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:42:41,120 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:42:41,121 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:42:41,121 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:59, output treesize:7 [2021-02-19 18:42:41,144 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:42:41,145 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:42:41,145 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 19 [2021-02-19 18:42:41,145 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770700986] [2021-02-19 18:42:41,145 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-02-19 18:42:41,145 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:42:41,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-02-19 18:42:41,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2021-02-19 18:42:41,146 INFO L87 Difference]: Start difference. First operand 825 states and 2053 transitions. Second operand has 20 states, 20 states have (on average 2.2) internal successors, (44), 19 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:42:41,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:42:41,783 INFO L93 Difference]: Finished difference Result 1068 states and 2530 transitions. [2021-02-19 18:42:41,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-02-19 18:42:41,783 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.2) internal successors, (44), 19 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-02-19 18:42:41,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:42:41,786 INFO L225 Difference]: With dead ends: 1068 [2021-02-19 18:42:41,786 INFO L226 Difference]: Without dead ends: 1031 [2021-02-19 18:42:41,786 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 328 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=203, Invalid=1057, Unknown=0, NotChecked=0, Total=1260 [2021-02-19 18:42:41,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1031 states. [2021-02-19 18:42:41,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1031 to 879. [2021-02-19 18:42:41,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 879 states, 878 states have (on average 2.503416856492027) internal successors, (2198), 878 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) [2021-02-19 18:42:41,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 879 states to 879 states and 2198 transitions. [2021-02-19 18:42:41,804 INFO L78 Accepts]: Start accepts. Automaton has 879 states and 2198 transitions. Word has length 26 [2021-02-19 18:42:41,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:42:41,804 INFO L480 AbstractCegarLoop]: Abstraction has 879 states and 2198 transitions. [2021-02-19 18:42:41,804 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.2) internal successors, (44), 19 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:42:41,804 INFO L276 IsEmpty]: Start isEmpty. Operand 879 states and 2198 transitions. [2021-02-19 18:42:41,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-02-19 18:42:41,806 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:42:41,806 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:42:42,021 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:42:42,021 INFO L428 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:42:42,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:42:42,021 INFO L82 PathProgramCache]: Analyzing trace with hash -493743121, now seen corresponding path program 31 times [2021-02-19 18:42:42,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:42:42,021 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296686948] [2021-02-19 18:42:42,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:42:42,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:42:42,281 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:42:42,281 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296686948] [2021-02-19 18:42:42,281 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1307790264] [2021-02-19 18:42:42,281 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 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 [2021-02-19 18:42:42,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:42:42,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 27 conjunts are in the unsatisfiable core [2021-02-19 18:42:42,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:42:42,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:42:42,481 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:42:42,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:42:42,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:42:42,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:42:42,484 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:42:42,484 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:42:42,485 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 7 [2021-02-19 18:42:42,486 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:42:42,492 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:42:42,493 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:42:42,493 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:59, output treesize:7 [2021-02-19 18:42:42,521 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:42:42,521 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:42:42,521 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 19 [2021-02-19 18:42:42,521 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980423551] [2021-02-19 18:42:42,521 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-02-19 18:42:42,521 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:42:42,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-02-19 18:42:42,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2021-02-19 18:42:42,522 INFO L87 Difference]: Start difference. First operand 879 states and 2198 transitions. Second operand has 20 states, 20 states have (on average 2.15) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:42:43,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:42:43,735 INFO L93 Difference]: Finished difference Result 1224 states and 2892 transitions. [2021-02-19 18:42:43,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-02-19 18:42:43,736 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-02-19 18:42:43,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:42:43,739 INFO L225 Difference]: With dead ends: 1224 [2021-02-19 18:42:43,739 INFO L226 Difference]: Without dead ends: 1172 [2021-02-19 18:42:43,739 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 556 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=334, Invalid=1828, Unknown=0, NotChecked=0, Total=2162 [2021-02-19 18:42:43,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1172 states. [2021-02-19 18:42:43,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1172 to 940. [2021-02-19 18:42:43,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 940 states, 939 states have (on average 2.505857294994675) internal successors, (2353), 939 states have internal predecessors, (2353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:42:43,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 940 states to 940 states and 2353 transitions. [2021-02-19 18:42:43,752 INFO L78 Accepts]: Start accepts. Automaton has 940 states and 2353 transitions. Word has length 26 [2021-02-19 18:42:43,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:42:43,752 INFO L480 AbstractCegarLoop]: Abstraction has 940 states and 2353 transitions. [2021-02-19 18:42:43,752 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:42:43,752 INFO L276 IsEmpty]: Start isEmpty. Operand 940 states and 2353 transitions. [2021-02-19 18:42:43,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-02-19 18:42:43,754 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:42:43,754 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:42:43,969 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-02-19 18:42:43,969 INFO L428 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:42:43,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:42:43,969 INFO L82 PathProgramCache]: Analyzing trace with hash 171963631, now seen corresponding path program 32 times [2021-02-19 18:42:43,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:42:43,970 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088008714] [2021-02-19 18:42:43,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:42:43,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:42:44,226 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:42:44,226 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088008714] [2021-02-19 18:42:44,226 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1298291400] [2021-02-19 18:42:44,226 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 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 [2021-02-19 18:42:44,245 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 18:42:44,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:42:44,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 27 conjunts are in the unsatisfiable core [2021-02-19 18:42:44,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:42:44,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:42:44,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:42:44,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:42:44,432 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:42:44,432 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:42:44,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:42:44,434 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:42:44,434 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 7 [2021-02-19 18:42:44,435 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:42:44,442 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:42:44,443 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:42:44,443 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:59, output treesize:7 [2021-02-19 18:42:44,466 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:42:44,467 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:42:44,467 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 19 [2021-02-19 18:42:44,467 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177985938] [2021-02-19 18:42:44,467 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-02-19 18:42:44,467 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:42:44,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-02-19 18:42:44,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2021-02-19 18:42:44,468 INFO L87 Difference]: Start difference. First operand 940 states and 2353 transitions. Second operand has 20 states, 20 states have (on average 2.15) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:42:45,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:42:45,791 INFO L93 Difference]: Finished difference Result 1036 states and 2533 transitions. [2021-02-19 18:42:45,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-02-19 18:42:45,791 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-02-19 18:42:45,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:42:45,795 INFO L225 Difference]: With dead ends: 1036 [2021-02-19 18:42:45,795 INFO L226 Difference]: Without dead ends: 1014 [2021-02-19 18:42:45,795 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 491 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=294, Invalid=1776, Unknown=0, NotChecked=0, Total=2070 [2021-02-19 18:42:45,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1014 states. [2021-02-19 18:42:45,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1014 to 940. [2021-02-19 18:42:45,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 940 states, 939 states have (on average 2.49307774227902) internal successors, (2341), 939 states have internal predecessors, (2341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:42:45,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 940 states to 940 states and 2341 transitions. [2021-02-19 18:42:45,809 INFO L78 Accepts]: Start accepts. Automaton has 940 states and 2341 transitions. Word has length 26 [2021-02-19 18:42:45,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:42:45,809 INFO L480 AbstractCegarLoop]: Abstraction has 940 states and 2341 transitions. [2021-02-19 18:42:45,809 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:42:45,809 INFO L276 IsEmpty]: Start isEmpty. Operand 940 states and 2341 transitions. [2021-02-19 18:42:45,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-02-19 18:42:45,810 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:42:45,810 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:42:46,022 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:42:46,022 INFO L428 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:42:46,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:42:46,022 INFO L82 PathProgramCache]: Analyzing trace with hash 789332219, now seen corresponding path program 33 times [2021-02-19 18:42:46,022 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:42:46,022 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046139178] [2021-02-19 18:42:46,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:42:46,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:42:46,334 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:42:46,334 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046139178] [2021-02-19 18:42:46,334 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [969855245] [2021-02-19 18:42:46,335 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 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-02-19 18:42:46,361 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-02-19 18:42:46,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:42:46,362 WARN L261 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 31 conjunts are in the unsatisfiable core [2021-02-19 18:42:46,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:42:46,796 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:42:46,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:42:46,801 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:42:46,825 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:42:46,825 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 49 treesize of output 55 [2021-02-19 18:42:46,838 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-02-19 18:42:46,878 INFO L628 ElimStorePlain]: treesize reduction 38, result has 47.9 percent of original size [2021-02-19 18:42:46,888 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 18:42:46,888 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:71, output treesize:22 [2021-02-19 18:42:46,944 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:42:46,944 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:42:46,944 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 25 [2021-02-19 18:42:46,945 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702538265] [2021-02-19 18:42:46,946 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-02-19 18:42:46,947 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:42:46,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-02-19 18:42:46,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=553, Unknown=0, NotChecked=0, Total=650 [2021-02-19 18:42:46,947 INFO L87 Difference]: Start difference. First operand 940 states and 2341 transitions. Second operand has 26 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 25 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:42:48,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:42:48,202 INFO L93 Difference]: Finished difference Result 1252 states and 3030 transitions. [2021-02-19 18:42:48,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-02-19 18:42:48,203 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 25 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-02-19 18:42:48,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:42:48,206 INFO L225 Difference]: With dead ends: 1252 [2021-02-19 18:42:48,206 INFO L226 Difference]: Without dead ends: 1238 [2021-02-19 18:42:48,207 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 539 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=312, Invalid=1850, Unknown=0, NotChecked=0, Total=2162 [2021-02-19 18:42:48,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1238 states. [2021-02-19 18:42:48,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1238 to 962. [2021-02-19 18:42:48,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 962 states, 961 states have (on average 2.502601456815817) internal successors, (2405), 961 states have internal predecessors, (2405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:42:48,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 962 states to 962 states and 2405 transitions. [2021-02-19 18:42:48,222 INFO L78 Accepts]: Start accepts. Automaton has 962 states and 2405 transitions. Word has length 26 [2021-02-19 18:42:48,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:42:48,222 INFO L480 AbstractCegarLoop]: Abstraction has 962 states and 2405 transitions. [2021-02-19 18:42:48,222 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 25 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:42:48,222 INFO L276 IsEmpty]: Start isEmpty. Operand 962 states and 2405 transitions. [2021-02-19 18:42:48,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-02-19 18:42:48,224 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:42:48,224 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:42:48,438 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-02-19 18:42:48,438 INFO L428 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:42:48,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:42:48,438 INFO L82 PathProgramCache]: Analyzing trace with hash 66860471, now seen corresponding path program 34 times [2021-02-19 18:42:48,439 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:42:48,439 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848744565] [2021-02-19 18:42:48,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:42:48,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:42:48,687 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:42:48,688 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848744565] [2021-02-19 18:42:48,688 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1255533134] [2021-02-19 18:42:48,688 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 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 [2021-02-19 18:42:48,704 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 18:42:48,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:42:48,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 27 conjunts are in the unsatisfiable core [2021-02-19 18:42:48,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:42:48,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:42:48,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:42:48,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:42:48,914 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:42:48,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:42:48,915 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:42:48,916 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:42:48,916 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 7 [2021-02-19 18:42:48,918 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:42:48,924 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:42:48,925 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:42:48,925 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:59, output treesize:7 [2021-02-19 18:42:48,951 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:42:48,951 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:42:48,951 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 20 [2021-02-19 18:42:48,952 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49703064] [2021-02-19 18:42:48,952 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-02-19 18:42:48,952 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:42:48,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-02-19 18:42:48,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2021-02-19 18:42:48,952 INFO L87 Difference]: Start difference. First operand 962 states and 2405 transitions. Second operand has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:42:49,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:42:49,867 INFO L93 Difference]: Finished difference Result 1380 states and 3307 transitions. [2021-02-19 18:42:49,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-02-19 18:42:49,867 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-02-19 18:42:49,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:42:49,870 INFO L225 Difference]: With dead ends: 1380 [2021-02-19 18:42:49,870 INFO L226 Difference]: Without dead ends: 1325 [2021-02-19 18:42:49,870 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 419 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=253, Invalid=1387, Unknown=0, NotChecked=0, Total=1640 [2021-02-19 18:42:49,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1325 states. [2021-02-19 18:42:49,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1325 to 1005. [2021-02-19 18:42:49,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1005 states, 1004 states have (on average 2.483067729083665) internal successors, (2493), 1004 states have internal predecessors, (2493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:42:49,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1005 states to 1005 states and 2493 transitions. [2021-02-19 18:42:49,887 INFO L78 Accepts]: Start accepts. Automaton has 1005 states and 2493 transitions. Word has length 26 [2021-02-19 18:42:49,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:42:49,887 INFO L480 AbstractCegarLoop]: Abstraction has 1005 states and 2493 transitions. [2021-02-19 18:42:49,887 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:42:49,887 INFO L276 IsEmpty]: Start isEmpty. Operand 1005 states and 2493 transitions. [2021-02-19 18:42:49,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-02-19 18:42:49,889 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:42:49,889 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:42:50,110 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:42:50,110 INFO L428 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:42:50,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:42:50,110 INFO L82 PathProgramCache]: Analyzing trace with hash -477415497, now seen corresponding path program 35 times [2021-02-19 18:42:50,110 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:42:50,110 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791302584] [2021-02-19 18:42:50,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:42:50,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:42:50,317 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:42:50,318 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791302584] [2021-02-19 18:42:50,318 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1534256470] [2021-02-19 18:42:50,318 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 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 [2021-02-19 18:42:50,335 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-02-19 18:42:50,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:42:50,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 27 conjunts are in the unsatisfiable core [2021-02-19 18:42:50,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:42:50,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:42:50,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:42:50,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:42:50,554 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:42:50,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:42:50,556 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:42:50,556 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:42:50,557 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 7 [2021-02-19 18:42:50,558 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:42:50,565 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:42:50,566 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:42:50,566 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:59, output treesize:7 [2021-02-19 18:42:50,585 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:42:50,585 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:42:50,585 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 19 [2021-02-19 18:42:50,585 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542149396] [2021-02-19 18:42:50,585 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-02-19 18:42:50,586 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:42:50,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-02-19 18:42:50,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2021-02-19 18:42:50,586 INFO L87 Difference]: Start difference. First operand 1005 states and 2493 transitions. Second operand has 20 states, 20 states have (on average 2.2) internal successors, (44), 19 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:42:51,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:42:51,430 INFO L93 Difference]: Finished difference Result 1303 states and 3059 transitions. [2021-02-19 18:42:51,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-02-19 18:42:51,430 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.2) internal successors, (44), 19 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-02-19 18:42:51,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:42:51,432 INFO L225 Difference]: With dead ends: 1303 [2021-02-19 18:42:51,432 INFO L226 Difference]: Without dead ends: 1269 [2021-02-19 18:42:51,433 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 386 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=230, Invalid=1252, Unknown=0, NotChecked=0, Total=1482 [2021-02-19 18:42:51,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1269 states. [2021-02-19 18:42:51,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1269 to 1053. [2021-02-19 18:42:51,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1053 states, 1052 states have (on average 2.4980988593155895) internal successors, (2628), 1052 states have internal predecessors, (2628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:42:51,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1053 states to 1053 states and 2628 transitions. [2021-02-19 18:42:51,448 INFO L78 Accepts]: Start accepts. Automaton has 1053 states and 2628 transitions. Word has length 26 [2021-02-19 18:42:51,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:42:51,448 INFO L480 AbstractCegarLoop]: Abstraction has 1053 states and 2628 transitions. [2021-02-19 18:42:51,449 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.2) internal successors, (44), 19 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:42:51,449 INFO L276 IsEmpty]: Start isEmpty. Operand 1053 states and 2628 transitions. [2021-02-19 18:42:51,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-02-19 18:42:51,450 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:42:51,450 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:42:51,653 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2021-02-19 18:42:51,653 INFO L428 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:42:51,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:42:51,653 INFO L82 PathProgramCache]: Analyzing trace with hash -1881731981, now seen corresponding path program 36 times [2021-02-19 18:42:51,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:42:51,653 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977701914] [2021-02-19 18:42:51,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:42:51,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:42:51,900 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:42:51,900 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977701914] [2021-02-19 18:42:51,900 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [396008093] [2021-02-19 18:42:51,900 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 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 [2021-02-19 18:42:51,926 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-02-19 18:42:51,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:42:51,927 WARN L261 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 31 conjunts are in the unsatisfiable core [2021-02-19 18:42:51,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:42:52,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:42:52,302 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:42:52,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:42:52,306 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:42:52,331 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:42:52,331 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 49 treesize of output 55 [2021-02-19 18:42:52,345 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-02-19 18:42:52,397 INFO L628 ElimStorePlain]: treesize reduction 52, result has 42.2 percent of original size [2021-02-19 18:42:52,407 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:42:52,408 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:74, output treesize:50 [2021-02-19 18:42:52,541 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:42:52,541 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:42:52,541 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 24 [2021-02-19 18:42:52,541 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174642293] [2021-02-19 18:42:52,541 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-02-19 18:42:52,541 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:42:52,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-02-19 18:42:52,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2021-02-19 18:42:52,542 INFO L87 Difference]: Start difference. First operand 1053 states and 2628 transitions. Second operand has 25 states, 25 states have (on average 1.8) internal successors, (45), 24 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:42:54,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:42:54,586 INFO L93 Difference]: Finished difference Result 1517 states and 3621 transitions. [2021-02-19 18:42:54,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-02-19 18:42:54,587 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.8) internal successors, (45), 24 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-02-19 18:42:54,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:42:54,588 INFO L225 Difference]: With dead ends: 1517 [2021-02-19 18:42:54,588 INFO L226 Difference]: Without dead ends: 1455 [2021-02-19 18:42:54,589 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 915 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=505, Invalid=2687, Unknown=0, NotChecked=0, Total=3192 [2021-02-19 18:42:54,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1455 states. [2021-02-19 18:42:54,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1455 to 1096. [2021-02-19 18:42:54,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1096 states, 1095 states have (on average 2.4968036529680364) internal successors, (2734), 1095 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) [2021-02-19 18:42:54,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1096 states to 1096 states and 2734 transitions. [2021-02-19 18:42:54,606 INFO L78 Accepts]: Start accepts. Automaton has 1096 states and 2734 transitions. Word has length 26 [2021-02-19 18:42:54,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:42:54,606 INFO L480 AbstractCegarLoop]: Abstraction has 1096 states and 2734 transitions. [2021-02-19 18:42:54,606 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.8) internal successors, (45), 24 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:42:54,606 INFO L276 IsEmpty]: Start isEmpty. Operand 1096 states and 2734 transitions. [2021-02-19 18:42:54,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-02-19 18:42:54,608 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:42:54,608 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:42:54,822 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-02-19 18:42:54,822 INFO L428 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:42:54,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:42:54,823 INFO L82 PathProgramCache]: Analyzing trace with hash 1295866415, now seen corresponding path program 37 times [2021-02-19 18:42:54,823 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:42:54,823 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618425699] [2021-02-19 18:42:54,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:42:54,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:42:55,073 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:42:55,073 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618425699] [2021-02-19 18:42:55,073 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [208121910] [2021-02-19 18:42:55,073 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 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 [2021-02-19 18:42:55,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:42:55,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 27 conjunts are in the unsatisfiable core [2021-02-19 18:42:55,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:42:55,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:42:55,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:42:55,266 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:42:55,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:42:55,268 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:42:55,268 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:42:55,269 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 7 [2021-02-19 18:42:55,270 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:42:55,277 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:42:55,278 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:42:55,278 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:59, output treesize:7 [2021-02-19 18:42:55,303 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:42:55,303 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:42:55,303 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 19 [2021-02-19 18:42:55,303 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133237484] [2021-02-19 18:42:55,303 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-02-19 18:42:55,303 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:42:55,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-02-19 18:42:55,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2021-02-19 18:42:55,304 INFO L87 Difference]: Start difference. First operand 1096 states and 2734 transitions. Second operand has 20 states, 20 states have (on average 2.15) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:42:56,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:42:56,447 INFO L93 Difference]: Finished difference Result 1328 states and 3219 transitions. [2021-02-19 18:42:56,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-02-19 18:42:56,448 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-02-19 18:42:56,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:42:56,449 INFO L225 Difference]: With dead ends: 1328 [2021-02-19 18:42:56,449 INFO L226 Difference]: Without dead ends: 1286 [2021-02-19 18:42:56,450 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 393 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=270, Invalid=1452, Unknown=0, NotChecked=0, Total=1722 [2021-02-19 18:42:56,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1286 states. [2021-02-19 18:42:56,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1286 to 1122. [2021-02-19 18:42:56,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1122 states, 1121 states have (on average 2.487065120428189) internal successors, (2788), 1121 states have internal predecessors, (2788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:42:56,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1122 states to 1122 states and 2788 transitions. [2021-02-19 18:42:56,463 INFO L78 Accepts]: Start accepts. Automaton has 1122 states and 2788 transitions. Word has length 26 [2021-02-19 18:42:56,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:42:56,463 INFO L480 AbstractCegarLoop]: Abstraction has 1122 states and 2788 transitions. [2021-02-19 18:42:56,463 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:42:56,463 INFO L276 IsEmpty]: Start isEmpty. Operand 1122 states and 2788 transitions. [2021-02-19 18:42:56,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-02-19 18:42:56,465 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:42:56,465 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:42:56,673 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:42:56,674 INFO L428 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:42:56,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:42:56,674 INFO L82 PathProgramCache]: Analyzing trace with hash -2087670413, now seen corresponding path program 38 times [2021-02-19 18:42:56,674 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:42:56,674 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420154399] [2021-02-19 18:42:56,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:42:56,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:42:56,922 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:42:56,922 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420154399] [2021-02-19 18:42:56,922 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1479283938] [2021-02-19 18:42:56,922 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 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 [2021-02-19 18:42:56,941 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 18:42:56,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:42:56,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 27 conjunts are in the unsatisfiable core [2021-02-19 18:42:56,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:42:57,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:42:57,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:42:57,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:42:57,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:42:57,125 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:42:57,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:42:57,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:42:57,128 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:42:57,128 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:42:57,129 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 7 [2021-02-19 18:42:57,130 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:42:57,136 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:42:57,137 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:42:57,137 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:59, output treesize:7 [2021-02-19 18:42:57,165 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:42:57,166 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:42:57,166 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 19 [2021-02-19 18:42:57,166 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246133835] [2021-02-19 18:42:57,166 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-02-19 18:42:57,166 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:42:57,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-02-19 18:42:57,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2021-02-19 18:42:57,167 INFO L87 Difference]: Start difference. First operand 1122 states and 2788 transitions. Second operand has 20 states, 20 states have (on average 2.15) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:42:58,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:42:58,407 INFO L93 Difference]: Finished difference Result 1262 states and 3066 transitions. [2021-02-19 18:42:58,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-02-19 18:42:58,408 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-02-19 18:42:58,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:42:58,410 INFO L225 Difference]: With dead ends: 1262 [2021-02-19 18:42:58,411 INFO L226 Difference]: Without dead ends: 1255 [2021-02-19 18:42:58,411 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 425 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=277, Invalid=1529, Unknown=0, NotChecked=0, Total=1806 [2021-02-19 18:42:58,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1255 states. [2021-02-19 18:42:58,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1255 to 1131. [2021-02-19 18:42:58,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1131 states, 1130 states have (on average 2.4867256637168142) internal successors, (2810), 1130 states have internal predecessors, (2810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:42:58,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1131 states to 1131 states and 2810 transitions. [2021-02-19 18:42:58,427 INFO L78 Accepts]: Start accepts. Automaton has 1131 states and 2810 transitions. Word has length 26 [2021-02-19 18:42:58,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:42:58,429 INFO L480 AbstractCegarLoop]: Abstraction has 1131 states and 2810 transitions. [2021-02-19 18:42:58,429 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:42:58,429 INFO L276 IsEmpty]: Start isEmpty. Operand 1131 states and 2810 transitions. [2021-02-19 18:42:58,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-02-19 18:42:58,431 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:42:58,431 INFO L506 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:42:58,652 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:42:58,653 INFO L428 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:42:58,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:42:58,653 INFO L82 PathProgramCache]: Analyzing trace with hash -1814573779, now seen corresponding path program 39 times [2021-02-19 18:42:58,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:42:58,653 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145535955] [2021-02-19 18:42:58,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:42:58,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:42:58,748 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:42:58,748 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145535955] [2021-02-19 18:42:58,748 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [731286238] [2021-02-19 18:42:58,748 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 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 [2021-02-19 18:42:58,773 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-02-19 18:42:58,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:42:58,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 11 conjunts are in the unsatisfiable core [2021-02-19 18:42:58,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:42:58,953 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:42:58,953 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:42:58,953 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 21 [2021-02-19 18:42:58,953 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359749291] [2021-02-19 18:42:58,953 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-02-19 18:42:58,953 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:42:58,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-02-19 18:42:58,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2021-02-19 18:42:58,954 INFO L87 Difference]: Start difference. First operand 1131 states and 2810 transitions. Second operand has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:42:59,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:42:59,714 INFO L93 Difference]: Finished difference Result 1659 states and 3859 transitions. [2021-02-19 18:42:59,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-02-19 18:42:59,714 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-02-19 18:42:59,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:42:59,716 INFO L225 Difference]: With dead ends: 1659 [2021-02-19 18:42:59,716 INFO L226 Difference]: Without dead ends: 1659 [2021-02-19 18:42:59,717 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 631 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=772, Invalid=2090, Unknown=0, NotChecked=0, Total=2862 [2021-02-19 18:42:59,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1659 states. [2021-02-19 18:42:59,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1659 to 1088. [2021-02-19 18:42:59,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1088 states, 1087 states have (on average 2.4885004599816005) internal successors, (2705), 1087 states have internal predecessors, (2705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:42:59,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1088 states to 1088 states and 2705 transitions. [2021-02-19 18:42:59,729 INFO L78 Accepts]: Start accepts. Automaton has 1088 states and 2705 transitions. Word has length 28 [2021-02-19 18:42:59,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:42:59,729 INFO L480 AbstractCegarLoop]: Abstraction has 1088 states and 2705 transitions. [2021-02-19 18:42:59,729 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:42:59,729 INFO L276 IsEmpty]: Start isEmpty. Operand 1088 states and 2705 transitions. [2021-02-19 18:42:59,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-02-19 18:42:59,731 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:42:59,731 INFO L506 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:42:59,940 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:42:59,940 INFO L428 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:42:59,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:42:59,940 INFO L82 PathProgramCache]: Analyzing trace with hash 1142308455, now seen corresponding path program 40 times [2021-02-19 18:42:59,940 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:42:59,940 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486159176] [2021-02-19 18:42:59,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:42:59,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:43:00,013 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:43:00,013 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486159176] [2021-02-19 18:43:00,013 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1958153849] [2021-02-19 18:43:00,013 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 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 [2021-02-19 18:43:00,030 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 18:43:00,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:43:00,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 11 conjunts are in the unsatisfiable core [2021-02-19 18:43:00,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:43:00,236 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:43:00,236 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:43:00,236 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-02-19 18:43:00,236 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374792618] [2021-02-19 18:43:00,236 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-02-19 18:43:00,236 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:43:00,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-02-19 18:43:00,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2021-02-19 18:43:00,237 INFO L87 Difference]: Start difference. First operand 1088 states and 2705 transitions. Second operand has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:43:01,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:43:01,306 INFO L93 Difference]: Finished difference Result 2098 states and 4811 transitions. [2021-02-19 18:43:01,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-02-19 18:43:01,307 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-02-19 18:43:01,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:43:01,309 INFO L225 Difference]: With dead ends: 2098 [2021-02-19 18:43:01,309 INFO L226 Difference]: Without dead ends: 2027 [2021-02-19 18:43:01,310 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1104 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=923, Invalid=2983, Unknown=0, NotChecked=0, Total=3906 [2021-02-19 18:43:01,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2027 states. [2021-02-19 18:43:01,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2027 to 1266. [2021-02-19 18:43:01,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1266 states, 1265 states have (on average 2.5043478260869567) internal successors, (3168), 1265 states have internal predecessors, (3168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:43:01,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1266 states to 1266 states and 3168 transitions. [2021-02-19 18:43:01,333 INFO L78 Accepts]: Start accepts. Automaton has 1266 states and 3168 transitions. Word has length 28 [2021-02-19 18:43:01,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:43:01,333 INFO L480 AbstractCegarLoop]: Abstraction has 1266 states and 3168 transitions. [2021-02-19 18:43:01,333 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:43:01,333 INFO L276 IsEmpty]: Start isEmpty. Operand 1266 states and 3168 transitions. [2021-02-19 18:43:01,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-02-19 18:43:01,335 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:43:01,335 INFO L506 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:43:01,556 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-02-19 18:43:01,556 INFO L428 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:43:01,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:43:01,556 INFO L82 PathProgramCache]: Analyzing trace with hash 1036672295, now seen corresponding path program 41 times [2021-02-19 18:43:01,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:43:01,557 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136967598] [2021-02-19 18:43:01,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:43:01,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:43:01,613 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:43:01,614 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136967598] [2021-02-19 18:43:01,614 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [431948533] [2021-02-19 18:43:01,614 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 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 [2021-02-19 18:43:01,642 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-02-19 18:43:01,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:43:01,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 11 conjunts are in the unsatisfiable core [2021-02-19 18:43:01,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:43:01,796 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:43:01,796 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:43:01,796 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 17 [2021-02-19 18:43:01,796 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197901600] [2021-02-19 18:43:01,796 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 18:43:01,797 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:43:01,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 18:43:01,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-02-19 18:43:01,797 INFO L87 Difference]: Start difference. First operand 1266 states and 3168 transitions. Second operand has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:43:02,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:43:02,636 INFO L93 Difference]: Finished difference Result 2349 states and 5625 transitions. [2021-02-19 18:43:02,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-02-19 18:43:02,637 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-02-19 18:43:02,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:43:02,641 INFO L225 Difference]: With dead ends: 2349 [2021-02-19 18:43:02,641 INFO L226 Difference]: Without dead ends: 2343 [2021-02-19 18:43:02,641 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 853 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=836, Invalid=2134, Unknown=0, NotChecked=0, Total=2970 [2021-02-19 18:43:02,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2343 states. [2021-02-19 18:43:02,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2343 to 1568. [2021-02-19 18:43:02,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1568 states, 1567 states have (on average 2.5252074026802807) internal successors, (3957), 1567 states have internal predecessors, (3957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:43:02,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1568 states to 1568 states and 3957 transitions. [2021-02-19 18:43:02,667 INFO L78 Accepts]: Start accepts. Automaton has 1568 states and 3957 transitions. Word has length 28 [2021-02-19 18:43:02,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:43:02,667 INFO L480 AbstractCegarLoop]: Abstraction has 1568 states and 3957 transitions. [2021-02-19 18:43:02,667 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:43:02,668 INFO L276 IsEmpty]: Start isEmpty. Operand 1568 states and 3957 transitions. [2021-02-19 18:43:02,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-02-19 18:43:02,669 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:43:02,670 INFO L506 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:43:02,886 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:43:02,886 INFO L428 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:43:02,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:43:02,887 INFO L82 PathProgramCache]: Analyzing trace with hash 704993507, now seen corresponding path program 42 times [2021-02-19 18:43:02,887 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:43:02,887 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922224424] [2021-02-19 18:43:02,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:43:02,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:43:02,953 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:43:02,953 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922224424] [2021-02-19 18:43:02,954 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [216892740] [2021-02-19 18:43:02,954 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 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 [2021-02-19 18:43:02,972 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-02-19 18:43:02,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:43:02,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 11 conjunts are in the unsatisfiable core [2021-02-19 18:43:02,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:43:03,134 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:43:03,134 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:43:03,134 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 17 [2021-02-19 18:43:03,134 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331859493] [2021-02-19 18:43:03,134 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 18:43:03,134 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:43:03,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 18:43:03,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2021-02-19 18:43:03,135 INFO L87 Difference]: Start difference. First operand 1568 states and 3957 transitions. Second operand has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:43:03,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:43:03,806 INFO L93 Difference]: Finished difference Result 1855 states and 4495 transitions. [2021-02-19 18:43:03,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-02-19 18:43:03,807 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-02-19 18:43:03,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:43:03,810 INFO L225 Difference]: With dead ends: 1855 [2021-02-19 18:43:03,810 INFO L226 Difference]: Without dead ends: 1851 [2021-02-19 18:43:03,810 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 669 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=647, Invalid=1903, Unknown=0, NotChecked=0, Total=2550 [2021-02-19 18:43:03,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1851 states. [2021-02-19 18:43:03,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1851 to 1540. [2021-02-19 18:43:03,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1540 states, 1539 states have (on average 2.5269655620532814) internal successors, (3889), 1539 states have internal predecessors, (3889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:43:03,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1540 states to 1540 states and 3889 transitions. [2021-02-19 18:43:03,831 INFO L78 Accepts]: Start accepts. Automaton has 1540 states and 3889 transitions. Word has length 28 [2021-02-19 18:43:03,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:43:03,831 INFO L480 AbstractCegarLoop]: Abstraction has 1540 states and 3889 transitions. [2021-02-19 18:43:03,831 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:43:03,831 INFO L276 IsEmpty]: Start isEmpty. Operand 1540 states and 3889 transitions. [2021-02-19 18:43:03,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-02-19 18:43:03,833 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:43:03,833 INFO L506 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:43:04,053 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:43:04,054 INFO L428 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:43:04,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:43:04,054 INFO L82 PathProgramCache]: Analyzing trace with hash 1472652013, now seen corresponding path program 43 times [2021-02-19 18:43:04,054 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:43:04,054 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190002127] [2021-02-19 18:43:04,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:43:04,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:43:04,107 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 17 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 18:43:04,107 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190002127] [2021-02-19 18:43:04,107 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2021373715] [2021-02-19 18:43:04,107 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 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 [2021-02-19 18:43:04,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:43:04,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 11 conjunts are in the unsatisfiable core [2021-02-19 18:43:04,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:43:04,279 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:43:04,279 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:43:04,279 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 17 [2021-02-19 18:43:04,279 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984323337] [2021-02-19 18:43:04,280 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 18:43:04,280 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:43:04,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 18:43:04,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-02-19 18:43:04,280 INFO L87 Difference]: Start difference. First operand 1540 states and 3889 transitions. Second operand has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:43:04,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:43:04,871 INFO L93 Difference]: Finished difference Result 2146 states and 5210 transitions. [2021-02-19 18:43:04,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-02-19 18:43:04,871 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-02-19 18:43:04,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:43:04,874 INFO L225 Difference]: With dead ends: 2146 [2021-02-19 18:43:04,874 INFO L226 Difference]: Without dead ends: 2137 [2021-02-19 18:43:04,875 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 433 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=421, Invalid=1301, Unknown=0, NotChecked=0, Total=1722 [2021-02-19 18:43:04,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2137 states. [2021-02-19 18:43:04,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2137 to 1645. [2021-02-19 18:43:04,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1645 states, 1644 states have (on average 2.5413625304136254) internal successors, (4178), 1644 states have internal predecessors, (4178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:43:04,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1645 states to 1645 states and 4178 transitions. [2021-02-19 18:43:04,900 INFO L78 Accepts]: Start accepts. Automaton has 1645 states and 4178 transitions. Word has length 28 [2021-02-19 18:43:04,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:43:04,900 INFO L480 AbstractCegarLoop]: Abstraction has 1645 states and 4178 transitions. [2021-02-19 18:43:04,900 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:43:04,900 INFO L276 IsEmpty]: Start isEmpty. Operand 1645 states and 4178 transitions. [2021-02-19 18:43:04,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-02-19 18:43:04,902 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:43:04,902 INFO L506 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:43:05,118 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-02-19 18:43:05,118 INFO L428 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:43:05,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:43:05,118 INFO L82 PathProgramCache]: Analyzing trace with hash 1917185035, now seen corresponding path program 44 times [2021-02-19 18:43:05,118 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:43:05,118 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890816414] [2021-02-19 18:43:05,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:43:05,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:43:05,173 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:43:05,173 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890816414] [2021-02-19 18:43:05,173 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [497992877] [2021-02-19 18:43:05,173 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 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 [2021-02-19 18:43:05,192 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 18:43:05,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:43:05,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 11 conjunts are in the unsatisfiable core [2021-02-19 18:43:05,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:43:05,357 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:43:05,357 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:43:05,357 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 18 [2021-02-19 18:43:05,357 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019317744] [2021-02-19 18:43:05,358 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 18:43:05,358 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:43:05,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 18:43:05,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2021-02-19 18:43:05,358 INFO L87 Difference]: Start difference. First operand 1645 states and 4178 transitions. Second operand has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 18 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:43:06,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:43:06,114 INFO L93 Difference]: Finished difference Result 2239 states and 5399 transitions. [2021-02-19 18:43:06,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-02-19 18:43:06,114 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 18 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-02-19 18:43:06,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:43:06,116 INFO L225 Difference]: With dead ends: 2239 [2021-02-19 18:43:06,116 INFO L226 Difference]: Without dead ends: 2229 [2021-02-19 18:43:06,116 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 775 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=680, Invalid=2076, Unknown=0, NotChecked=0, Total=2756 [2021-02-19 18:43:06,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2229 states. [2021-02-19 18:43:06,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2229 to 1698. [2021-02-19 18:43:06,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1698 states, 1697 states have (on average 2.5521508544490277) internal successors, (4331), 1697 states have internal predecessors, (4331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:43:06,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1698 states to 1698 states and 4331 transitions. [2021-02-19 18:43:06,134 INFO L78 Accepts]: Start accepts. Automaton has 1698 states and 4331 transitions. Word has length 28 [2021-02-19 18:43:06,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:43:06,134 INFO L480 AbstractCegarLoop]: Abstraction has 1698 states and 4331 transitions. [2021-02-19 18:43:06,134 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 18 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:43:06,135 INFO L276 IsEmpty]: Start isEmpty. Operand 1698 states and 4331 transitions. [2021-02-19 18:43:06,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-02-19 18:43:06,136 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:43:06,136 INFO L506 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:43:06,336 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:43:06,337 INFO L428 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:43:06,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:43:06,337 INFO L82 PathProgramCache]: Analyzing trace with hash -569670389, now seen corresponding path program 45 times [2021-02-19 18:43:06,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:43:06,337 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706391420] [2021-02-19 18:43:06,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:43:06,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:43:06,405 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:43:06,405 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706391420] [2021-02-19 18:43:06,405 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1507355727] [2021-02-19 18:43:06,405 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 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 [2021-02-19 18:43:06,437 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-02-19 18:43:06,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:43:06,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 11 conjunts are in the unsatisfiable core [2021-02-19 18:43:06,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:43:06,602 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:43:06,602 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:43:06,602 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2021-02-19 18:43:06,602 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645818617] [2021-02-19 18:43:06,602 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-02-19 18:43:06,602 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:43:06,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-02-19 18:43:06,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2021-02-19 18:43:06,603 INFO L87 Difference]: Start difference. First operand 1698 states and 4331 transitions. Second operand has 20 states, 20 states have (on average 2.3) internal successors, (46), 19 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:43:07,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:43:07,323 INFO L93 Difference]: Finished difference Result 2460 states and 5924 transitions. [2021-02-19 18:43:07,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-02-19 18:43:07,323 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.3) internal successors, (46), 19 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-02-19 18:43:07,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:43:07,325 INFO L225 Difference]: With dead ends: 2460 [2021-02-19 18:43:07,325 INFO L226 Difference]: Without dead ends: 2438 [2021-02-19 18:43:07,326 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 882 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=724, Invalid=2246, Unknown=0, NotChecked=0, Total=2970 [2021-02-19 18:43:07,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2438 states. [2021-02-19 18:43:07,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2438 to 1613. [2021-02-19 18:43:07,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1613 states, 1612 states have (on average 2.5372208436724564) internal successors, (4090), 1612 states have internal predecessors, (4090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:43:07,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1613 states to 1613 states and 4090 transitions. [2021-02-19 18:43:07,355 INFO L78 Accepts]: Start accepts. Automaton has 1613 states and 4090 transitions. Word has length 28 [2021-02-19 18:43:07,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:43:07,355 INFO L480 AbstractCegarLoop]: Abstraction has 1613 states and 4090 transitions. [2021-02-19 18:43:07,355 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.3) internal successors, (46), 19 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:43:07,355 INFO L276 IsEmpty]: Start isEmpty. Operand 1613 states and 4090 transitions. [2021-02-19 18:43:07,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-02-19 18:43:07,357 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:43:07,357 INFO L506 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:43:07,574 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable71 [2021-02-19 18:43:07,574 INFO L428 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:43:07,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:43:07,574 INFO L82 PathProgramCache]: Analyzing trace with hash -1486150539, now seen corresponding path program 46 times [2021-02-19 18:43:07,574 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:43:07,574 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356854095] [2021-02-19 18:43:07,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:43:07,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:43:07,660 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 18:43:07,660 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356854095] [2021-02-19 18:43:07,660 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2037565779] [2021-02-19 18:43:07,660 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 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-02-19 18:43:07,709 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 18:43:07,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:43:07,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 11 conjunts are in the unsatisfiable core [2021-02-19 18:43:07,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:43:07,879 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:43:07,879 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:43:07,879 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-02-19 18:43:07,879 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383827064] [2021-02-19 18:43:07,879 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-02-19 18:43:07,879 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:43:07,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-02-19 18:43:07,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2021-02-19 18:43:07,880 INFO L87 Difference]: Start difference. First operand 1613 states and 4090 transitions. Second operand has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 20 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:43:08,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:43:08,715 INFO L93 Difference]: Finished difference Result 2433 states and 5712 transitions. [2021-02-19 18:43:08,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-02-19 18:43:08,716 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 20 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-02-19 18:43:08,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:43:08,718 INFO L225 Difference]: With dead ends: 2433 [2021-02-19 18:43:08,718 INFO L226 Difference]: Without dead ends: 2433 [2021-02-19 18:43:08,718 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 708 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=773, Invalid=2089, Unknown=0, NotChecked=0, Total=2862 [2021-02-19 18:43:08,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2433 states. [2021-02-19 18:43:08,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2433 to 1379. [2021-02-19 18:43:08,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1379 states, 1378 states have (on average 2.4985486211901304) internal successors, (3443), 1378 states have internal predecessors, (3443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:43:08,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1379 states to 1379 states and 3443 transitions. [2021-02-19 18:43:08,734 INFO L78 Accepts]: Start accepts. Automaton has 1379 states and 3443 transitions. Word has length 28 [2021-02-19 18:43:08,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:43:08,734 INFO L480 AbstractCegarLoop]: Abstraction has 1379 states and 3443 transitions. [2021-02-19 18:43:08,734 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 20 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:43:08,734 INFO L276 IsEmpty]: Start isEmpty. Operand 1379 states and 3443 transitions. [2021-02-19 18:43:08,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-02-19 18:43:08,736 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:43:08,736 INFO L506 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:43:08,936 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:43:08,936 INFO L428 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:43:08,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:43:08,936 INFO L82 PathProgramCache]: Analyzing trace with hash -201255811, now seen corresponding path program 47 times [2021-02-19 18:43:08,936 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:43:08,936 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648644060] [2021-02-19 18:43:08,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:43:08,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:43:08,998 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 18:43:08,998 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648644060] [2021-02-19 18:43:08,998 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [505016648] [2021-02-19 18:43:08,998 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 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 [2021-02-19 18:43:09,015 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-02-19 18:43:09,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:43:09,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 11 conjunts are in the unsatisfiable core [2021-02-19 18:43:09,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:43:09,174 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:43:09,174 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:43:09,174 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2021-02-19 18:43:09,174 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389075886] [2021-02-19 18:43:09,174 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-02-19 18:43:09,174 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:43:09,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-02-19 18:43:09,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2021-02-19 18:43:09,175 INFO L87 Difference]: Start difference. First operand 1379 states and 3443 transitions. Second operand has 20 states, 20 states have (on average 2.3) internal successors, (46), 19 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:43:09,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:43:09,877 INFO L93 Difference]: Finished difference Result 1797 states and 4200 transitions. [2021-02-19 18:43:09,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-02-19 18:43:09,878 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.3) internal successors, (46), 19 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-02-19 18:43:09,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:43:09,879 INFO L225 Difference]: With dead ends: 1797 [2021-02-19 18:43:09,880 INFO L226 Difference]: Without dead ends: 1758 [2021-02-19 18:43:09,880 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 797 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=599, Invalid=2053, Unknown=0, NotChecked=0, Total=2652 [2021-02-19 18:43:09,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1758 states. [2021-02-19 18:43:09,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1758 to 1325. [2021-02-19 18:43:09,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1325 states, 1324 states have (on average 2.4841389728096677) internal successors, (3289), 1324 states have internal predecessors, (3289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:43:09,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1325 states to 1325 states and 3289 transitions. [2021-02-19 18:43:09,898 INFO L78 Accepts]: Start accepts. Automaton has 1325 states and 3289 transitions. Word has length 28 [2021-02-19 18:43:09,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:43:09,898 INFO L480 AbstractCegarLoop]: Abstraction has 1325 states and 3289 transitions. [2021-02-19 18:43:09,899 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.3) internal successors, (46), 19 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:43:09,899 INFO L276 IsEmpty]: Start isEmpty. Operand 1325 states and 3289 transitions. [2021-02-19 18:43:09,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-02-19 18:43:09,900 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:43:09,900 INFO L506 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:43:10,113 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:43:10,114 INFO L428 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:43:10,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:43:10,114 INFO L82 PathProgramCache]: Analyzing trace with hash 1314739129, now seen corresponding path program 48 times [2021-02-19 18:43:10,114 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:43:10,114 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300401965] [2021-02-19 18:43:10,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:43:10,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:43:10,177 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 18:43:10,177 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300401965] [2021-02-19 18:43:10,177 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1558072077] [2021-02-19 18:43:10,177 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 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 [2021-02-19 18:43:10,194 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-02-19 18:43:10,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:43:10,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 11 conjunts are in the unsatisfiable core [2021-02-19 18:43:10,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:43:10,349 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:43:10,350 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:43:10,350 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2021-02-19 18:43:10,350 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913716266] [2021-02-19 18:43:10,350 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-02-19 18:43:10,350 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:43:10,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-02-19 18:43:10,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2021-02-19 18:43:10,351 INFO L87 Difference]: Start difference. First operand 1325 states and 3289 transitions. Second operand has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:43:11,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:43:11,173 INFO L93 Difference]: Finished difference Result 2342 states and 5476 transitions. [2021-02-19 18:43:11,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-02-19 18:43:11,173 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-02-19 18:43:11,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:43:11,175 INFO L225 Difference]: With dead ends: 2342 [2021-02-19 18:43:11,175 INFO L226 Difference]: Without dead ends: 2342 [2021-02-19 18:43:11,176 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 959 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=892, Invalid=2300, Unknown=0, NotChecked=0, Total=3192 [2021-02-19 18:43:11,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2342 states. [2021-02-19 18:43:11,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2342 to 1424. [2021-02-19 18:43:11,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1424 states, 1423 states have (on average 2.460997891777934) internal successors, (3502), 1423 states have internal predecessors, (3502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:43:11,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1424 states to 1424 states and 3502 transitions. [2021-02-19 18:43:11,198 INFO L78 Accepts]: Start accepts. Automaton has 1424 states and 3502 transitions. Word has length 28 [2021-02-19 18:43:11,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:43:11,198 INFO L480 AbstractCegarLoop]: Abstraction has 1424 states and 3502 transitions. [2021-02-19 18:43:11,198 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:43:11,198 INFO L276 IsEmpty]: Start isEmpty. Operand 1424 states and 3502 transitions. [2021-02-19 18:43:11,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-02-19 18:43:11,200 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:43:11,200 INFO L506 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:43:11,421 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2021-02-19 18:43:11,421 INFO L428 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:43:11,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:43:11,422 INFO L82 PathProgramCache]: Analyzing trace with hash -2070066119, now seen corresponding path program 49 times [2021-02-19 18:43:11,422 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:43:11,422 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788297554] [2021-02-19 18:43:11,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:43:11,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:43:11,482 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 18:43:11,482 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788297554] [2021-02-19 18:43:11,482 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [96361888] [2021-02-19 18:43:11,482 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 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 [2021-02-19 18:43:11,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:43:11,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 11 conjunts are in the unsatisfiable core [2021-02-19 18:43:11,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:43:11,673 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:43:11,673 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:43:11,673 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 18 [2021-02-19 18:43:11,673 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599831096] [2021-02-19 18:43:11,673 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 18:43:11,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:43:11,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 18:43:11,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2021-02-19 18:43:11,674 INFO L87 Difference]: Start difference. First operand 1424 states and 3502 transitions. Second operand has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 18 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:43:12,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:43:12,317 INFO L93 Difference]: Finished difference Result 1768 states and 4145 transitions. [2021-02-19 18:43:12,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-02-19 18:43:12,317 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 18 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-02-19 18:43:12,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:43:12,319 INFO L225 Difference]: With dead ends: 1768 [2021-02-19 18:43:12,319 INFO L226 Difference]: Without dead ends: 1750 [2021-02-19 18:43:12,319 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 664 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=519, Invalid=1737, Unknown=0, NotChecked=0, Total=2256 [2021-02-19 18:43:12,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1750 states. [2021-02-19 18:43:12,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1750 to 1453. [2021-02-19 18:43:12,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1453 states, 1452 states have (on average 2.465564738292011) internal successors, (3580), 1452 states have internal predecessors, (3580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:43:12,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1453 states to 1453 states and 3580 transitions. [2021-02-19 18:43:12,333 INFO L78 Accepts]: Start accepts. Automaton has 1453 states and 3580 transitions. Word has length 28 [2021-02-19 18:43:12,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:43:12,333 INFO L480 AbstractCegarLoop]: Abstraction has 1453 states and 3580 transitions. [2021-02-19 18:43:12,333 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 18 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:43:12,333 INFO L276 IsEmpty]: Start isEmpty. Operand 1453 states and 3580 transitions. [2021-02-19 18:43:12,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-02-19 18:43:12,335 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:43:12,335 INFO L506 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:43:12,535 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:43:12,536 INFO L428 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:43:12,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:43:12,536 INFO L82 PathProgramCache]: Analyzing trace with hash -633853323, now seen corresponding path program 50 times [2021-02-19 18:43:12,536 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:43:12,536 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195177175] [2021-02-19 18:43:12,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:43:12,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:43:12,600 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 18:43:12,600 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195177175] [2021-02-19 18:43:12,600 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [118838456] [2021-02-19 18:43:12,600 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 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 [2021-02-19 18:43:12,622 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 18:43:12,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:43:12,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 11 conjunts are in the unsatisfiable core [2021-02-19 18:43:12,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:43:12,816 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:43:12,816 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:43:12,816 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 18 [2021-02-19 18:43:12,816 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157861653] [2021-02-19 18:43:12,816 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 18:43:12,816 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:43:12,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 18:43:12,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-02-19 18:43:12,817 INFO L87 Difference]: Start difference. First operand 1453 states and 3580 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:43:13,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:43:13,691 INFO L93 Difference]: Finished difference Result 2840 states and 6892 transitions. [2021-02-19 18:43:13,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-02-19 18:43:13,691 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-02-19 18:43:13,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:43:13,694 INFO L225 Difference]: With dead ends: 2840 [2021-02-19 18:43:13,694 INFO L226 Difference]: Without dead ends: 2840 [2021-02-19 18:43:13,694 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1214 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1080, Invalid=2580, Unknown=0, NotChecked=0, Total=3660 [2021-02-19 18:43:13,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2840 states. [2021-02-19 18:43:13,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2840 to 2234. [2021-02-19 18:43:13,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2234 states, 2233 states have (on average 2.5476936856247203) internal successors, (5689), 2233 states have internal predecessors, (5689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:43:13,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2234 states to 2234 states and 5689 transitions. [2021-02-19 18:43:13,718 INFO L78 Accepts]: Start accepts. Automaton has 2234 states and 5689 transitions. Word has length 28 [2021-02-19 18:43:13,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:43:13,719 INFO L480 AbstractCegarLoop]: Abstraction has 2234 states and 5689 transitions. [2021-02-19 18:43:13,719 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:43:13,719 INFO L276 IsEmpty]: Start isEmpty. Operand 2234 states and 5689 transitions. [2021-02-19 18:43:13,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-02-19 18:43:13,721 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:43:13,721 INFO L506 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:43:13,921 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2021-02-19 18:43:13,938 INFO L428 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:43:13,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:43:13,939 INFO L82 PathProgramCache]: Analyzing trace with hash 1909032749, now seen corresponding path program 51 times [2021-02-19 18:43:13,939 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:43:13,939 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420665054] [2021-02-19 18:43:13,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:43:13,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:43:13,991 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 18:43:13,991 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420665054] [2021-02-19 18:43:13,991 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [588645042] [2021-02-19 18:43:13,991 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 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 [2021-02-19 18:43:14,010 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-02-19 18:43:14,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:43:14,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 11 conjunts are in the unsatisfiable core [2021-02-19 18:43:14,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:43:14,157 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:43:14,157 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:43:14,157 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 17 [2021-02-19 18:43:14,157 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190744186] [2021-02-19 18:43:14,157 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 18:43:14,157 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:43:14,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 18:43:14,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2021-02-19 18:43:14,158 INFO L87 Difference]: Start difference. First operand 2234 states and 5689 transitions. Second operand has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:43:14,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:43:14,760 INFO L93 Difference]: Finished difference Result 2763 states and 6717 transitions. [2021-02-19 18:43:14,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-02-19 18:43:14,761 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-02-19 18:43:14,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:43:14,763 INFO L225 Difference]: With dead ends: 2763 [2021-02-19 18:43:14,763 INFO L226 Difference]: Without dead ends: 2759 [2021-02-19 18:43:14,763 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 636 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=634, Invalid=1622, Unknown=0, NotChecked=0, Total=2256 [2021-02-19 18:43:14,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2759 states. [2021-02-19 18:43:14,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2759 to 2208. [2021-02-19 18:43:14,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2208 states, 2207 states have (on average 2.545083824195741) internal successors, (5617), 2207 states have internal predecessors, (5617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:43:14,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2208 states to 2208 states and 5617 transitions. [2021-02-19 18:43:14,786 INFO L78 Accepts]: Start accepts. Automaton has 2208 states and 5617 transitions. Word has length 28 [2021-02-19 18:43:14,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:43:14,786 INFO L480 AbstractCegarLoop]: Abstraction has 2208 states and 5617 transitions. [2021-02-19 18:43:14,786 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:43:14,786 INFO L276 IsEmpty]: Start isEmpty. Operand 2208 states and 5617 transitions. [2021-02-19 18:43:14,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-02-19 18:43:14,788 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:43:14,788 INFO L506 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:43:14,988 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2021-02-19 18:43:14,989 INFO L428 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:43:14,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:43:14,989 INFO L82 PathProgramCache]: Analyzing trace with hash 1402686483, now seen corresponding path program 52 times [2021-02-19 18:43:14,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:43:14,989 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934918971] [2021-02-19 18:43:14,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:43:14,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:43:15,060 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 18:43:15,061 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934918971] [2021-02-19 18:43:15,061 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1235683034] [2021-02-19 18:43:15,061 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 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-02-19 18:43:15,090 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 18:43:15,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:43:15,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 11 conjunts are in the unsatisfiable core [2021-02-19 18:43:15,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:43:15,285 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:43:15,285 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:43:15,285 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 18 [2021-02-19 18:43:15,285 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272288991] [2021-02-19 18:43:15,286 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 18:43:15,286 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:43:15,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 18:43:15,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-02-19 18:43:15,286 INFO L87 Difference]: Start difference. First operand 2208 states and 5617 transitions. Second operand has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 18 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:43:15,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:43:15,910 INFO L93 Difference]: Finished difference Result 2963 states and 7207 transitions. [2021-02-19 18:43:15,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-02-19 18:43:15,911 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 18 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-02-19 18:43:15,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:43:15,913 INFO L225 Difference]: With dead ends: 2963 [2021-02-19 18:43:15,913 INFO L226 Difference]: Without dead ends: 2951 [2021-02-19 18:43:15,913 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 667 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=613, Invalid=1739, Unknown=0, NotChecked=0, Total=2352 [2021-02-19 18:43:15,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2951 states. [2021-02-19 18:43:15,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2951 to 2376. [2021-02-19 18:43:15,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2376 states, 2375 states have (on average 2.56) internal successors, (6080), 2375 states have internal predecessors, (6080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:43:15,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2376 states to 2376 states and 6080 transitions. [2021-02-19 18:43:15,940 INFO L78 Accepts]: Start accepts. Automaton has 2376 states and 6080 transitions. Word has length 28 [2021-02-19 18:43:15,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:43:15,940 INFO L480 AbstractCegarLoop]: Abstraction has 2376 states and 6080 transitions. [2021-02-19 18:43:15,940 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 18 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:43:15,940 INFO L276 IsEmpty]: Start isEmpty. Operand 2376 states and 6080 transitions. [2021-02-19 18:43:15,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-02-19 18:43:15,942 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:43:15,943 INFO L506 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:43:16,144 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2021-02-19 18:43:16,144 INFO L428 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:43:16,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:43:16,144 INFO L82 PathProgramCache]: Analyzing trace with hash 1175465103, now seen corresponding path program 53 times [2021-02-19 18:43:16,144 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:43:16,144 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107973395] [2021-02-19 18:43:16,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:43:16,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:43:16,211 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 18:43:16,211 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107973395] [2021-02-19 18:43:16,211 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [979213283] [2021-02-19 18:43:16,211 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 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-02-19 18:43:16,241 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-02-19 18:43:16,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:43:16,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 11 conjunts are in the unsatisfiable core [2021-02-19 18:43:16,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:43:16,430 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:43:16,430 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:43:16,430 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2021-02-19 18:43:16,430 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245911131] [2021-02-19 18:43:16,431 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-02-19 18:43:16,431 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:43:16,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-02-19 18:43:16,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=305, Unknown=0, NotChecked=0, Total=380 [2021-02-19 18:43:16,431 INFO L87 Difference]: Start difference. First operand 2376 states and 6080 transitions. Second operand has 20 states, 20 states have (on average 2.3) internal successors, (46), 19 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:43:17,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:43:17,160 INFO L93 Difference]: Finished difference Result 3272 states and 7971 transitions. [2021-02-19 18:43:17,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-02-19 18:43:17,160 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.3) internal successors, (46), 19 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-02-19 18:43:17,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:43:17,163 INFO L225 Difference]: With dead ends: 3272 [2021-02-19 18:43:17,163 INFO L226 Difference]: Without dead ends: 3252 [2021-02-19 18:43:17,166 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 765 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=662, Invalid=1990, Unknown=0, NotChecked=0, Total=2652 [2021-02-19 18:43:17,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3252 states. [2021-02-19 18:43:17,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3252 to 2615. [2021-02-19 18:43:17,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2615 states, 2614 states have (on average 2.5734506503443) internal successors, (6727), 2614 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) [2021-02-19 18:43:17,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2615 states to 2615 states and 6727 transitions. [2021-02-19 18:43:17,197 INFO L78 Accepts]: Start accepts. Automaton has 2615 states and 6727 transitions. Word has length 28 [2021-02-19 18:43:17,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:43:17,197 INFO L480 AbstractCegarLoop]: Abstraction has 2615 states and 6727 transitions. [2021-02-19 18:43:17,197 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.3) internal successors, (46), 19 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:43:17,197 INFO L276 IsEmpty]: Start isEmpty. Operand 2615 states and 6727 transitions. [2021-02-19 18:43:17,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-02-19 18:43:17,199 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:43:17,199 INFO L506 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:43:17,399 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2021-02-19 18:43:17,400 INFO L428 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:43:17,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:43:17,400 INFO L82 PathProgramCache]: Analyzing trace with hash 1859051019, now seen corresponding path program 54 times [2021-02-19 18:43:17,400 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:43:17,400 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077817617] [2021-02-19 18:43:17,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:43:17,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:43:17,493 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:43:17,493 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077817617] [2021-02-19 18:43:17,493 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1673009513] [2021-02-19 18:43:17,493 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 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-02-19 18:43:17,517 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-02-19 18:43:17,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:43:17,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 11 conjunts are in the unsatisfiable core [2021-02-19 18:43:17,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:43:17,728 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:43:17,728 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:43:17,728 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-02-19 18:43:17,728 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602862011] [2021-02-19 18:43:17,728 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-02-19 18:43:17,728 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:43:17,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-02-19 18:43:17,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2021-02-19 18:43:17,729 INFO L87 Difference]: Start difference. First operand 2615 states and 6727 transitions. Second operand has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 20 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:43:18,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:43:18,518 INFO L93 Difference]: Finished difference Result 3381 states and 8327 transitions. [2021-02-19 18:43:18,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-02-19 18:43:18,518 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 20 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-02-19 18:43:18,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:43:18,521 INFO L225 Difference]: With dead ends: 3381 [2021-02-19 18:43:18,521 INFO L226 Difference]: Without dead ends: 3353 [2021-02-19 18:43:18,522 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 956 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=778, Invalid=2414, Unknown=0, NotChecked=0, Total=3192 [2021-02-19 18:43:18,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3353 states. [2021-02-19 18:43:18,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3353 to 2789. [2021-02-19 18:43:18,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2789 states, 2788 states have (on average 2.581061692969871) internal successors, (7196), 2788 states have internal predecessors, (7196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:43:18,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2789 states to 2789 states and 7196 transitions. [2021-02-19 18:43:18,552 INFO L78 Accepts]: Start accepts. Automaton has 2789 states and 7196 transitions. Word has length 28 [2021-02-19 18:43:18,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:43:18,552 INFO L480 AbstractCegarLoop]: Abstraction has 2789 states and 7196 transitions. [2021-02-19 18:43:18,552 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 20 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:43:18,552 INFO L276 IsEmpty]: Start isEmpty. Operand 2789 states and 7196 transitions. [2021-02-19 18:43:18,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-02-19 18:43:18,555 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:43:18,555 INFO L506 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:43:18,766 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:43:18,766 INFO L428 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:43:18,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:43:18,767 INFO L82 PathProgramCache]: Analyzing trace with hash 358198373, now seen corresponding path program 55 times [2021-02-19 18:43:18,767 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:43:18,767 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833999894] [2021-02-19 18:43:18,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:43:18,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:43:19,078 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:43:19,079 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833999894] [2021-02-19 18:43:19,079 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1358004120] [2021-02-19 18:43:19,079 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 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 [2021-02-19 18:43:19,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:43:19,098 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2021-02-19 18:43:19,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:43:19,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:43:19,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:43:19,407 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:43:19,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:43:19,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:43:19,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:43:19,411 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:43:19,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:43:19,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:43:19,413 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:43:19,413 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:43:19,414 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 7 [2021-02-19 18:43:19,415 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:43:19,420 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:43:19,421 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:43:19,421 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:75, output treesize:7 [2021-02-19 18:43:19,445 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:43:19,445 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:43:19,445 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 24 [2021-02-19 18:43:19,445 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493695920] [2021-02-19 18:43:19,445 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-02-19 18:43:19,445 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:43:19,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-02-19 18:43:19,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2021-02-19 18:43:19,446 INFO L87 Difference]: Start difference. First operand 2789 states and 7196 transitions. Second operand has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 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) [2021-02-19 18:43:21,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:43:21,301 INFO L93 Difference]: Finished difference Result 3804 states and 9538 transitions. [2021-02-19 18:43:21,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-02-19 18:43:21,301 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 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) Word has length 30 [2021-02-19 18:43:21,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:43:21,304 INFO L225 Difference]: With dead ends: 3804 [2021-02-19 18:43:21,305 INFO L226 Difference]: Without dead ends: 3797 [2021-02-19 18:43:21,305 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 651 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=415, Invalid=2447, Unknown=0, NotChecked=0, Total=2862 [2021-02-19 18:43:21,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3797 states. [2021-02-19 18:43:21,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3797 to 2848. [2021-02-19 18:43:21,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2848 states, 2847 states have (on average 2.582718651211802) internal successors, (7353), 2847 states have internal predecessors, (7353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:43:21,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2848 states to 2848 states and 7353 transitions. [2021-02-19 18:43:21,337 INFO L78 Accepts]: Start accepts. Automaton has 2848 states and 7353 transitions. Word has length 30 [2021-02-19 18:43:21,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:43:21,337 INFO L480 AbstractCegarLoop]: Abstraction has 2848 states and 7353 transitions. [2021-02-19 18:43:21,337 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 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) [2021-02-19 18:43:21,337 INFO L276 IsEmpty]: Start isEmpty. Operand 2848 states and 7353 transitions. [2021-02-19 18:43:21,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-02-19 18:43:21,341 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:43:21,341 INFO L506 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:43:21,555 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:43:21,555 INFO L428 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:43:21,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:43:21,555 INFO L82 PathProgramCache]: Analyzing trace with hash -78338445, now seen corresponding path program 56 times [2021-02-19 18:43:21,555 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:43:21,555 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826447347] [2021-02-19 18:43:21,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:43:21,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:43:21,909 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:43:21,910 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826447347] [2021-02-19 18:43:21,910 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1764673761] [2021-02-19 18:43:21,910 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 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 [2021-02-19 18:43:21,929 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 18:43:21,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:43:21,930 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2021-02-19 18:43:21,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:43:22,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:43:22,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:43:22,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:43:22,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:43:22,217 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:43:22,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:43:22,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:43:22,219 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:43:22,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:43:22,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:43:22,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:43:22,222 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:43:22,222 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:43:22,223 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 7 [2021-02-19 18:43:22,224 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:43:22,229 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:43:22,230 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:43:22,230 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:75, output treesize:7 [2021-02-19 18:43:22,253 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:43:22,253 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:43:22,253 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 24 [2021-02-19 18:43:22,253 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430654278] [2021-02-19 18:43:22,253 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-02-19 18:43:22,253 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:43:22,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-02-19 18:43:22,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2021-02-19 18:43:22,254 INFO L87 Difference]: Start difference. First operand 2848 states and 7353 transitions. Second operand has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 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) [2021-02-19 18:43:23,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:43:23,839 INFO L93 Difference]: Finished difference Result 3780 states and 9511 transitions. [2021-02-19 18:43:23,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-02-19 18:43:23,840 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 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) Word has length 30 [2021-02-19 18:43:23,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:43:23,843 INFO L225 Difference]: With dead ends: 3780 [2021-02-19 18:43:23,843 INFO L226 Difference]: Without dead ends: 3729 [2021-02-19 18:43:23,843 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 522 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=341, Invalid=2011, Unknown=0, NotChecked=0, Total=2352 [2021-02-19 18:43:23,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3729 states. [2021-02-19 18:43:23,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3729 to 2901. [2021-02-19 18:43:23,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2901 states, 2900 states have (on average 2.5724137931034483) internal successors, (7460), 2900 states have internal predecessors, (7460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:43:23,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2901 states to 2901 states and 7460 transitions. [2021-02-19 18:43:23,871 INFO L78 Accepts]: Start accepts. Automaton has 2901 states and 7460 transitions. Word has length 30 [2021-02-19 18:43:23,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:43:23,871 INFO L480 AbstractCegarLoop]: Abstraction has 2901 states and 7460 transitions. [2021-02-19 18:43:23,871 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 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) [2021-02-19 18:43:23,871 INFO L276 IsEmpty]: Start isEmpty. Operand 2901 states and 7460 transitions. [2021-02-19 18:43:23,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-02-19 18:43:23,873 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:43:23,873 INFO L506 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:43:24,074 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:43:24,074 INFO L428 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:43:24,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:43:24,074 INFO L82 PathProgramCache]: Analyzing trace with hash 1411013679, now seen corresponding path program 57 times [2021-02-19 18:43:24,074 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:43:24,074 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48616684] [2021-02-19 18:43:24,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:43:24,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:43:24,388 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:43:24,388 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48616684] [2021-02-19 18:43:24,389 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1449149879] [2021-02-19 18:43:24,389 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 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 [2021-02-19 18:43:24,408 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-02-19 18:43:24,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:43:24,408 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 39 conjunts are in the unsatisfiable core [2021-02-19 18:43:24,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:43:25,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:43:25,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:43:25,051 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:43:25,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:43:25,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:43:25,056 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:43:25,101 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:43:25,101 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 4 disjoint index pairs (out of 28 index pairs), introduced 6 new quantified variables, introduced 19 case distinctions, treesize of input 69 treesize of output 127 [2021-02-19 18:43:25,485 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 5 xjuncts. [2021-02-19 18:43:25,593 WARN L202 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 23 [2021-02-19 18:43:25,594 INFO L628 ElimStorePlain]: treesize reduction 469, result has 6.9 percent of original size [2021-02-19 18:43:25,602 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 18:43:25,602 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:91, output treesize:22 [2021-02-19 18:43:25,676 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:43:25,676 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:43:25,676 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 29 [2021-02-19 18:43:25,676 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576150661] [2021-02-19 18:43:25,677 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-02-19 18:43:25,677 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:43:25,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-02-19 18:43:25,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=759, Unknown=0, NotChecked=0, Total=870 [2021-02-19 18:43:25,677 INFO L87 Difference]: Start difference. First operand 2901 states and 7460 transitions. Second operand has 30 states, 30 states have (on average 1.7666666666666666) internal successors, (53), 29 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) [2021-02-19 18:43:28,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:43:28,044 INFO L93 Difference]: Finished difference Result 3908 states and 9787 transitions. [2021-02-19 18:43:28,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-02-19 18:43:28,045 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.7666666666666666) internal successors, (53), 29 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) Word has length 30 [2021-02-19 18:43:28,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:43:28,048 INFO L225 Difference]: With dead ends: 3908 [2021-02-19 18:43:28,048 INFO L226 Difference]: Without dead ends: 3862 [2021-02-19 18:43:28,049 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 685 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=405, Invalid=2457, Unknown=0, NotChecked=0, Total=2862 [2021-02-19 18:43:28,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3862 states. [2021-02-19 18:43:28,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3862 to 2945. [2021-02-19 18:43:28,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2945 states, 2944 states have (on average 2.567255434782609) internal successors, (7558), 2944 states have internal predecessors, (7558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:43:28,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2945 states to 2945 states and 7558 transitions. [2021-02-19 18:43:28,077 INFO L78 Accepts]: Start accepts. Automaton has 2945 states and 7558 transitions. Word has length 30 [2021-02-19 18:43:28,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:43:28,077 INFO L480 AbstractCegarLoop]: Abstraction has 2945 states and 7558 transitions. [2021-02-19 18:43:28,077 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.7666666666666666) internal successors, (53), 29 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) [2021-02-19 18:43:28,078 INFO L276 IsEmpty]: Start isEmpty. Operand 2945 states and 7558 transitions. [2021-02-19 18:43:28,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-02-19 18:43:28,080 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:43:28,080 INFO L506 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:43:28,280 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable83 [2021-02-19 18:43:28,281 INFO L428 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:43:28,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:43:28,281 INFO L82 PathProgramCache]: Analyzing trace with hash 688541931, now seen corresponding path program 58 times [2021-02-19 18:43:28,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:43:28,281 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861088071] [2021-02-19 18:43:28,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:43:28,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:43:28,603 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:43:28,603 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861088071] [2021-02-19 18:43:28,603 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [581248798] [2021-02-19 18:43:28,603 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 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 [2021-02-19 18:43:28,621 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 18:43:28,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:43:28,622 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2021-02-19 18:43:28,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:43:28,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:43:28,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:43:28,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:43:28,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:43:28,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:43:28,974 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:43:28,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:43:28,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:43:28,976 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:43:28,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:43:28,977 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:43:28,977 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:43:28,978 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 7 [2021-02-19 18:43:28,979 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:43:28,984 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:43:28,985 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:43:28,985 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:75, output treesize:7 [2021-02-19 18:43:29,009 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:43:29,009 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:43:29,010 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 24 [2021-02-19 18:43:29,010 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730724754] [2021-02-19 18:43:29,010 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-02-19 18:43:29,010 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:43:29,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-02-19 18:43:29,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=512, Unknown=0, NotChecked=0, Total=600 [2021-02-19 18:43:29,010 INFO L87 Difference]: Start difference. First operand 2945 states and 7558 transitions. Second operand has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 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) [2021-02-19 18:43:30,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:43:30,703 INFO L93 Difference]: Finished difference Result 4122 states and 10273 transitions. [2021-02-19 18:43:30,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-02-19 18:43:30,703 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 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) Word has length 30 [2021-02-19 18:43:30,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:43:30,707 INFO L225 Difference]: With dead ends: 4122 [2021-02-19 18:43:30,707 INFO L226 Difference]: Without dead ends: 4089 [2021-02-19 18:43:30,707 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 689 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=412, Invalid=2344, Unknown=0, NotChecked=0, Total=2756 [2021-02-19 18:43:30,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4089 states. [2021-02-19 18:43:30,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4089 to 3033. [2021-02-19 18:43:30,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3033 states, 3032 states have (on average 2.5577176781002637) internal successors, (7755), 3032 states have internal predecessors, (7755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:43:30,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3033 states to 3033 states and 7755 transitions. [2021-02-19 18:43:30,738 INFO L78 Accepts]: Start accepts. Automaton has 3033 states and 7755 transitions. Word has length 30 [2021-02-19 18:43:30,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:43:30,739 INFO L480 AbstractCegarLoop]: Abstraction has 3033 states and 7755 transitions. [2021-02-19 18:43:30,739 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 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) [2021-02-19 18:43:30,739 INFO L276 IsEmpty]: Start isEmpty. Operand 3033 states and 7755 transitions. [2021-02-19 18:43:30,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-02-19 18:43:30,741 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:43:30,741 INFO L506 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:43:30,962 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:43:30,962 INFO L428 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:43:30,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:43:30,963 INFO L82 PathProgramCache]: Analyzing trace with hash -1381481305, now seen corresponding path program 59 times [2021-02-19 18:43:30,963 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:43:30,963 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845621307] [2021-02-19 18:43:30,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:43:30,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:43:31,291 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:43:31,291 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845621307] [2021-02-19 18:43:31,291 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1985547463] [2021-02-19 18:43:31,291 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 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 [2021-02-19 18:43:31,312 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-02-19 18:43:31,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:43:31,312 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2021-02-19 18:43:31,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:43:31,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:43:31,619 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:43:31,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:43:31,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:43:31,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:43:31,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:43:31,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:43:31,624 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:43:31,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:43:31,625 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:43:31,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:43:31,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:43:31,627 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:43:31,628 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 7 [2021-02-19 18:43:31,629 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:43:31,634 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:43:31,635 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:43:31,635 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:75, output treesize:7 [2021-02-19 18:43:31,676 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:43:31,676 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:43:31,676 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 24 [2021-02-19 18:43:31,676 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6040109] [2021-02-19 18:43:31,676 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-02-19 18:43:31,676 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:43:31,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-02-19 18:43:31,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2021-02-19 18:43:31,677 INFO L87 Difference]: Start difference. First operand 3033 states and 7755 transitions. Second operand has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 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) [2021-02-19 18:43:34,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:43:34,018 INFO L93 Difference]: Finished difference Result 4365 states and 10816 transitions. [2021-02-19 18:43:34,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-02-19 18:43:34,019 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 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) Word has length 30 [2021-02-19 18:43:34,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:43:34,023 INFO L225 Difference]: With dead ends: 4365 [2021-02-19 18:43:34,023 INFO L226 Difference]: Without dead ends: 4356 [2021-02-19 18:43:34,024 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 961 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=507, Invalid=3275, Unknown=0, NotChecked=0, Total=3782 [2021-02-19 18:43:34,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4356 states. [2021-02-19 18:43:34,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4356 to 3054. [2021-02-19 18:43:34,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3054 states, 3053 states have (on average 2.563380281690141) internal successors, (7826), 3053 states have internal predecessors, (7826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:43:34,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3054 states to 3054 states and 7826 transitions. [2021-02-19 18:43:34,059 INFO L78 Accepts]: Start accepts. Automaton has 3054 states and 7826 transitions. Word has length 30 [2021-02-19 18:43:34,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:43:34,059 INFO L480 AbstractCegarLoop]: Abstraction has 3054 states and 7826 transitions. [2021-02-19 18:43:34,060 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 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) [2021-02-19 18:43:34,060 INFO L276 IsEmpty]: Start isEmpty. Operand 3054 states and 7826 transitions. [2021-02-19 18:43:34,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-02-19 18:43:34,063 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:43:34,063 INFO L506 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:43:34,265 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186,61 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:43:34,266 INFO L428 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:43:34,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:43:34,266 INFO L82 PathProgramCache]: Analyzing trace with hash 287538093, now seen corresponding path program 60 times [2021-02-19 18:43:34,266 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:43:34,266 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015526444] [2021-02-19 18:43:34,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:43:34,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:43:34,593 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:43:34,593 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015526444] [2021-02-19 18:43:34,593 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1014847076] [2021-02-19 18:43:34,593 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 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-02-19 18:43:34,619 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-02-19 18:43:34,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:43:34,619 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2021-02-19 18:43:34,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:43:35,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:43:35,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:43:35,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:43:35,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:43:35,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:43:35,006 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:43:35,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:43:35,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:43:35,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:43:35,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:43:35,011 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:43:35,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:43:35,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:43:35,013 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:43:35,014 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:43:35,015 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 7 [2021-02-19 18:43:35,016 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:43:35,023 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:43:35,024 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:43:35,024 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:75, output treesize:7 [2021-02-19 18:43:35,055 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:43:35,056 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:43:35,056 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 23 [2021-02-19 18:43:35,056 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368875678] [2021-02-19 18:43:35,056 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-02-19 18:43:35,056 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:43:35,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-02-19 18:43:35,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=478, Unknown=0, NotChecked=0, Total=552 [2021-02-19 18:43:35,057 INFO L87 Difference]: Start difference. First operand 3054 states and 7826 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 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) [2021-02-19 18:43:36,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:43:36,993 INFO L93 Difference]: Finished difference Result 4381 states and 10894 transitions. [2021-02-19 18:43:36,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-02-19 18:43:36,994 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 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) Word has length 30 [2021-02-19 18:43:36,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:43:36,998 INFO L225 Difference]: With dead ends: 4381 [2021-02-19 18:43:36,998 INFO L226 Difference]: Without dead ends: 4342 [2021-02-19 18:43:36,998 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 19 SyntacticMatches, 4 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 733 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=431, Invalid=2539, Unknown=0, NotChecked=0, Total=2970 [2021-02-19 18:43:37,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4342 states. [2021-02-19 18:43:37,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4342 to 3201. [2021-02-19 18:43:37,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3201 states, 3200 states have (on average 2.5534375) internal successors, (8171), 3200 states have internal predecessors, (8171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:43:37,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3201 states to 3201 states and 8171 transitions. [2021-02-19 18:43:37,031 INFO L78 Accepts]: Start accepts. Automaton has 3201 states and 8171 transitions. Word has length 30 [2021-02-19 18:43:37,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:43:37,032 INFO L480 AbstractCegarLoop]: Abstraction has 3201 states and 8171 transitions. [2021-02-19 18:43:37,032 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 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) [2021-02-19 18:43:37,032 INFO L276 IsEmpty]: Start isEmpty. Operand 3201 states and 8171 transitions. [2021-02-19 18:43:37,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-02-19 18:43:37,035 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:43:37,035 INFO L506 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:43:37,235 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:43:37,235 INFO L428 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:43:37,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:43:37,235 INFO L82 PathProgramCache]: Analyzing trace with hash -18723507, now seen corresponding path program 61 times [2021-02-19 18:43:37,235 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:43:37,236 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116803888] [2021-02-19 18:43:37,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:43:37,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:43:37,513 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 18:43:37,513 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116803888] [2021-02-19 18:43:37,513 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1213208419] [2021-02-19 18:43:37,513 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 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 [2021-02-19 18:43:37,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:43:37,533 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2021-02-19 18:43:37,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:43:37,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:43:37,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:43:37,845 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:43:37,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:43:37,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:43:37,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:43:37,850 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:43:37,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:43:37,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:43:37,853 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:43:37,853 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:43:37,854 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 7 [2021-02-19 18:43:37,855 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:43:37,860 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:43:37,862 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:43:37,862 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:75, output treesize:7 [2021-02-19 18:43:37,887 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:43:37,888 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:43:37,888 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-02-19 18:43:37,888 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873380971] [2021-02-19 18:43:37,888 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-02-19 18:43:37,888 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:43:37,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-02-19 18:43:37,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2021-02-19 18:43:37,888 INFO L87 Difference]: Start difference. First operand 3201 states and 8171 transitions. Second operand has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:43:39,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:43:39,734 INFO L93 Difference]: Finished difference Result 3546 states and 8893 transitions. [2021-02-19 18:43:39,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-02-19 18:43:39,735 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-02-19 18:43:39,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:43:39,738 INFO L225 Difference]: With dead ends: 3546 [2021-02-19 18:43:39,738 INFO L226 Difference]: Without dead ends: 3519 [2021-02-19 18:43:39,738 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 19 SyntacticMatches, 4 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 653 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=347, Invalid=2305, Unknown=0, NotChecked=0, Total=2652 [2021-02-19 18:43:39,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3519 states. [2021-02-19 18:43:39,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3519 to 3236. [2021-02-19 18:43:39,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3236 states, 3235 states have (on average 2.547758887171561) internal successors, (8242), 3235 states have internal predecessors, (8242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:43:39,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3236 states to 3236 states and 8242 transitions. [2021-02-19 18:43:39,766 INFO L78 Accepts]: Start accepts. Automaton has 3236 states and 8242 transitions. Word has length 30 [2021-02-19 18:43:39,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:43:39,766 INFO L480 AbstractCegarLoop]: Abstraction has 3236 states and 8242 transitions. [2021-02-19 18:43:39,767 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:43:39,767 INFO L276 IsEmpty]: Start isEmpty. Operand 3236 states and 8242 transitions. [2021-02-19 18:43:39,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-02-19 18:43:39,770 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:43:39,770 INFO L506 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:43:39,970 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable188 [2021-02-19 18:43:39,971 INFO L428 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:43:39,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:43:39,971 INFO L82 PathProgramCache]: Analyzing trace with hash -1365153681, now seen corresponding path program 62 times [2021-02-19 18:43:39,971 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:43:39,971 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551942439] [2021-02-19 18:43:39,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:43:39,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:43:40,296 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:43:40,296 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551942439] [2021-02-19 18:43:40,296 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1700318432] [2021-02-19 18:43:40,296 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 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 [2021-02-19 18:43:40,320 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 18:43:40,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:43:40,321 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2021-02-19 18:43:40,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:43:40,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:43:40,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:43:40,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:43:40,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:43:40,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:43:40,650 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:43:40,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:43:40,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:43:40,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:43:40,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:43:40,653 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:43:40,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:43:40,654 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:43:40,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:43:40,656 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:43:40,656 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 7 [2021-02-19 18:43:40,657 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:43:40,662 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:43:40,663 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:43:40,663 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:75, output treesize:7 [2021-02-19 18:43:40,687 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:43:40,687 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:43:40,687 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 23 [2021-02-19 18:43:40,688 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953007906] [2021-02-19 18:43:40,688 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-02-19 18:43:40,688 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:43:40,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-02-19 18:43:40,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=468, Unknown=0, NotChecked=0, Total=552 [2021-02-19 18:43:40,688 INFO L87 Difference]: Start difference. First operand 3236 states and 8242 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 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) [2021-02-19 18:43:42,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:43:42,378 INFO L93 Difference]: Finished difference Result 4584 states and 11321 transitions. [2021-02-19 18:43:42,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-02-19 18:43:42,378 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 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) Word has length 30 [2021-02-19 18:43:42,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:43:42,383 INFO L225 Difference]: With dead ends: 4584 [2021-02-19 18:43:42,383 INFO L226 Difference]: Without dead ends: 4551 [2021-02-19 18:43:42,383 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 823 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=502, Invalid=2468, Unknown=0, NotChecked=0, Total=2970 [2021-02-19 18:43:42,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4551 states. [2021-02-19 18:43:42,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4551 to 3249. [2021-02-19 18:43:42,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3249 states, 3248 states have (on average 2.543103448275862) internal successors, (8260), 3248 states have internal predecessors, (8260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:43:42,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3249 states to 3249 states and 8260 transitions. [2021-02-19 18:43:42,418 INFO L78 Accepts]: Start accepts. Automaton has 3249 states and 8260 transitions. Word has length 30 [2021-02-19 18:43:42,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:43:42,418 INFO L480 AbstractCegarLoop]: Abstraction has 3249 states and 8260 transitions. [2021-02-19 18:43:42,418 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 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) [2021-02-19 18:43:42,418 INFO L276 IsEmpty]: Start isEmpty. Operand 3249 states and 8260 transitions. [2021-02-19 18:43:42,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-02-19 18:43:42,421 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:43:42,421 INFO L506 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:43:42,621 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable189,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:43:42,622 INFO L428 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:43:42,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:43:42,622 INFO L82 PathProgramCache]: Analyzing trace with hash 1771220847, now seen corresponding path program 63 times [2021-02-19 18:43:42,622 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:43:42,622 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535862008] [2021-02-19 18:43:42,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:43:42,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:43:42,906 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 18:43:42,906 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535862008] [2021-02-19 18:43:42,907 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1036641046] [2021-02-19 18:43:42,907 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 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 [2021-02-19 18:43:42,930 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-02-19 18:43:42,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:43:42,933 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 38 conjunts are in the unsatisfiable core [2021-02-19 18:43:42,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:43:43,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:43:43,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:43:43,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:43:43,398 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:43:43,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:43:43,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:43:43,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:43:43,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:43:43,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:43:43,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:43:43,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:43:43,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:43:43,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:43:43,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:43:43,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:43:43,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:43:43,447 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:43:43,447 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 15 disjoint index pairs (out of 28 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 77 treesize of output 85 [2021-02-19 18:43:43,459 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-02-19 18:43:43,474 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:43:43,479 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 18:43:43,479 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:94, output treesize:27 [2021-02-19 18:43:43,560 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:43:43,560 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:43:43,560 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 26 [2021-02-19 18:43:43,560 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317139152] [2021-02-19 18:43:43,561 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-02-19 18:43:43,561 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:43:43,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-02-19 18:43:43,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=614, Unknown=0, NotChecked=0, Total=702 [2021-02-19 18:43:43,561 INFO L87 Difference]: Start difference. First operand 3249 states and 8260 transitions. Second operand has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 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) [2021-02-19 18:43:46,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:43:46,869 INFO L93 Difference]: Finished difference Result 4699 states and 11550 transitions. [2021-02-19 18:43:46,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-02-19 18:43:46,874 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 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) Word has length 30 [2021-02-19 18:43:46,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:43:46,879 INFO L225 Difference]: With dead ends: 4699 [2021-02-19 18:43:46,879 INFO L226 Difference]: Without dead ends: 4669 [2021-02-19 18:43:46,880 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1522 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=758, Invalid=4942, Unknown=0, NotChecked=0, Total=5700 [2021-02-19 18:43:46,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4669 states. [2021-02-19 18:43:46,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4669 to 3263. [2021-02-19 18:43:46,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3263 states, 3262 states have (on average 2.54199877375843) internal successors, (8292), 3262 states have internal predecessors, (8292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:43:46,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3263 states to 3263 states and 8292 transitions. [2021-02-19 18:43:46,928 INFO L78 Accepts]: Start accepts. Automaton has 3263 states and 8292 transitions. Word has length 30 [2021-02-19 18:43:46,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:43:46,928 INFO L480 AbstractCegarLoop]: Abstraction has 3263 states and 8292 transitions. [2021-02-19 18:43:46,929 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 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) [2021-02-19 18:43:46,929 INFO L276 IsEmpty]: Start isEmpty. Operand 3263 states and 8292 transitions. [2021-02-19 18:43:46,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-02-19 18:43:46,932 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:43:46,932 INFO L506 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:43:47,138 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable190 [2021-02-19 18:43:47,139 INFO L428 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:43:47,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:43:47,139 INFO L82 PathProgramCache]: Analyzing trace with hash -1571092113, now seen corresponding path program 64 times [2021-02-19 18:43:47,139 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:43:47,139 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345996395] [2021-02-19 18:43:47,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:43:47,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:43:47,426 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 6 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:43:47,426 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345996395] [2021-02-19 18:43:47,426 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2023739853] [2021-02-19 18:43:47,426 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 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 [2021-02-19 18:43:47,449 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 18:43:47,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:43:47,450 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2021-02-19 18:43:47,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:43:47,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:43:47,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:43:47,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:43:47,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:43:47,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:43:47,804 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:43:47,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:43:47,805 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:43:47,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:43:47,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:43:47,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:43:47,809 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:43:47,809 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:43:47,810 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 7 [2021-02-19 18:43:47,812 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:43:47,819 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:43:47,820 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:43:47,820 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:75, output treesize:7 [2021-02-19 18:43:47,849 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:43:47,849 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:43:47,849 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 23 [2021-02-19 18:43:47,849 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900399712] [2021-02-19 18:43:47,849 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-02-19 18:43:47,849 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:43:47,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-02-19 18:43:47,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=466, Unknown=0, NotChecked=0, Total=552 [2021-02-19 18:43:47,850 INFO L87 Difference]: Start difference. First operand 3263 states and 8292 transitions. Second operand has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 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) [2021-02-19 18:43:48,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:43:48,921 INFO L93 Difference]: Finished difference Result 3583 states and 8820 transitions. [2021-02-19 18:43:48,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-02-19 18:43:48,921 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 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) Word has length 30 [2021-02-19 18:43:48,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:43:48,924 INFO L225 Difference]: With dead ends: 3583 [2021-02-19 18:43:48,924 INFO L226 Difference]: Without dead ends: 3556 [2021-02-19 18:43:48,925 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 485 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=266, Invalid=1374, Unknown=0, NotChecked=0, Total=1640 [2021-02-19 18:43:48,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3556 states. [2021-02-19 18:43:48,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3556 to 3264. [2021-02-19 18:43:48,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3264 states, 3263 states have (on average 2.5375421391357644) internal successors, (8280), 3263 states have internal predecessors, (8280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:43:48,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3264 states to 3264 states and 8280 transitions. [2021-02-19 18:43:48,959 INFO L78 Accepts]: Start accepts. Automaton has 3264 states and 8280 transitions. Word has length 30 [2021-02-19 18:43:48,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:43:48,959 INFO L480 AbstractCegarLoop]: Abstraction has 3264 states and 8280 transitions. [2021-02-19 18:43:48,959 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 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) [2021-02-19 18:43:48,959 INFO L276 IsEmpty]: Start isEmpty. Operand 3264 states and 8280 transitions. [2021-02-19 18:43:48,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-02-19 18:43:48,961 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:43:48,961 INFO L506 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:43:49,162 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable198 [2021-02-19 18:43:49,162 INFO L428 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:43:49,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:43:49,162 INFO L82 PathProgramCache]: Analyzing trace with hash 653851947, now seen corresponding path program 65 times [2021-02-19 18:43:49,162 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:43:49,162 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922690982] [2021-02-19 18:43:49,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:43:49,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:43:49,497 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 6 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:43:49,497 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922690982] [2021-02-19 18:43:49,497 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [318908798] [2021-02-19 18:43:49,497 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 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 [2021-02-19 18:43:49,521 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-02-19 18:43:49,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:43:49,522 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2021-02-19 18:43:49,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:43:49,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:43:49,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:43:49,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:43:49,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:43:49,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:43:49,839 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:43:49,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:43:49,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:43:49,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:43:49,841 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:43:49,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:43:49,843 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:43:49,843 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:43:49,844 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 7 [2021-02-19 18:43:49,845 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:43:49,850 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:43:49,851 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:43:49,851 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:75, output treesize:7 [2021-02-19 18:43:49,880 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:43:49,880 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:43:49,880 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 23 [2021-02-19 18:43:49,880 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41838736] [2021-02-19 18:43:49,880 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-02-19 18:43:49,880 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:43:49,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-02-19 18:43:49,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=477, Unknown=0, NotChecked=0, Total=552 [2021-02-19 18:43:49,881 INFO L87 Difference]: Start difference. First operand 3264 states and 8280 transitions. Second operand has 24 states, 24 states have (on average 2.125) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:43:51,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:43:51,704 INFO L93 Difference]: Finished difference Result 4182 states and 10399 transitions. [2021-02-19 18:43:51,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-02-19 18:43:51,704 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-02-19 18:43:51,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:43:51,708 INFO L225 Difference]: With dead ends: 4182 [2021-02-19 18:43:51,709 INFO L226 Difference]: Without dead ends: 4154 [2021-02-19 18:43:51,709 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 707 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=439, Invalid=2317, Unknown=0, NotChecked=0, Total=2756 [2021-02-19 18:43:51,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4154 states. [2021-02-19 18:43:51,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4154 to 3288. [2021-02-19 18:43:51,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3288 states, 3287 states have (on average 2.5543048372376025) internal successors, (8396), 3287 states have internal predecessors, (8396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:43:51,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3288 states to 3288 states and 8396 transitions. [2021-02-19 18:43:51,764 INFO L78 Accepts]: Start accepts. Automaton has 3288 states and 8396 transitions. Word has length 30 [2021-02-19 18:43:51,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:43:51,764 INFO L480 AbstractCegarLoop]: Abstraction has 3288 states and 8396 transitions. [2021-02-19 18:43:51,764 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:43:51,764 INFO L276 IsEmpty]: Start isEmpty. Operand 3288 states and 8396 transitions. [2021-02-19 18:43:51,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-02-19 18:43:51,767 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:43:51,767 INFO L506 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:43:51,987 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable199 [2021-02-19 18:43:51,987 INFO L428 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:43:51,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:43:51,988 INFO L82 PathProgramCache]: Analyzing trace with hash 1319558699, now seen corresponding path program 66 times [2021-02-19 18:43:51,988 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:43:51,988 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302340893] [2021-02-19 18:43:51,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:43:51,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:43:52,353 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 9 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:43:52,353 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302340893] [2021-02-19 18:43:52,353 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1120491859] [2021-02-19 18:43:52,353 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 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 [2021-02-19 18:43:52,378 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-02-19 18:43:52,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:43:52,378 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 39 conjunts are in the unsatisfiable core [2021-02-19 18:43:52,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:43:53,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:43:53,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:43:53,109 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:43:53,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:43:53,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:43:53,120 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:43:53,198 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:43:53,199 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 3 disjoint index pairs (out of 28 index pairs), introduced 6 new quantified variables, introduced 20 case distinctions, treesize of input 69 treesize of output 137 [2021-02-19 18:43:53,658 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 6 xjuncts. [2021-02-19 18:43:53,853 WARN L202 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 26 [2021-02-19 18:43:53,854 INFO L628 ElimStorePlain]: treesize reduction 779, result has 4.7 percent of original size [2021-02-19 18:43:53,862 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:43:53,862 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:94, output treesize:50 [2021-02-19 18:43:54,009 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:43:54,010 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:43:54,010 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17] total 28 [2021-02-19 18:43:54,010 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741342313] [2021-02-19 18:43:54,010 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-02-19 18:43:54,010 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:43:54,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-02-19 18:43:54,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=710, Unknown=0, NotChecked=0, Total=812 [2021-02-19 18:43:54,010 INFO L87 Difference]: Start difference. First operand 3288 states and 8396 transitions. Second operand has 29 states, 29 states have (on average 1.8275862068965518) internal successors, (53), 28 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) [2021-02-19 18:43:55,857 WARN L202 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 63 [2021-02-19 18:43:58,948 WARN L202 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 44 [2021-02-19 18:43:59,152 WARN L202 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 44 [2021-02-19 18:44:00,657 WARN L202 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 42 [2021-02-19 18:44:01,198 WARN L202 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 38 [2021-02-19 18:44:02,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:44:02,567 INFO L93 Difference]: Finished difference Result 5148 states and 12715 transitions. [2021-02-19 18:44:02,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-02-19 18:44:02,568 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.8275862068965518) internal successors, (53), 28 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) Word has length 30 [2021-02-19 18:44:02,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:44:02,574 INFO L225 Difference]: With dead ends: 5148 [2021-02-19 18:44:02,574 INFO L226 Difference]: Without dead ends: 5075 [2021-02-19 18:44:02,574 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2270 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=1051, Invalid=6089, Unknown=0, NotChecked=0, Total=7140 [2021-02-19 18:44:02,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5075 states. [2021-02-19 18:44:02,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5075 to 3435. [2021-02-19 18:44:02,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3435 states, 3434 states have (on average 2.5503785672684915) internal successors, (8758), 3434 states have internal predecessors, (8758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:44:02,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3435 states to 3435 states and 8758 transitions. [2021-02-19 18:44:02,616 INFO L78 Accepts]: Start accepts. Automaton has 3435 states and 8758 transitions. Word has length 30 [2021-02-19 18:44:02,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:44:02,616 INFO L480 AbstractCegarLoop]: Abstraction has 3435 states and 8758 transitions. [2021-02-19 18:44:02,616 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.8275862068965518) internal successors, (53), 28 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) [2021-02-19 18:44:02,616 INFO L276 IsEmpty]: Start isEmpty. Operand 3435 states and 8758 transitions. [2021-02-19 18:44:02,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-02-19 18:44:02,619 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:44:02,619 INFO L506 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:44:02,820 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable200,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:44:02,820 INFO L428 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:44:02,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:44:02,820 INFO L82 PathProgramCache]: Analyzing trace with hash 519796591, now seen corresponding path program 67 times [2021-02-19 18:44:02,820 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:44:02,820 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923963832] [2021-02-19 18:44:02,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:44:02,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:44:03,184 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 2 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:44:03,184 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923963832] [2021-02-19 18:44:03,184 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [253767782] [2021-02-19 18:44:03,185 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 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 [2021-02-19 18:44:03,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:44:03,208 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2021-02-19 18:44:03,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:44:03,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:44:03,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:44:03,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:44:03,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:44:03,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:44:03,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:44:03,564 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:44:03,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:44:03,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:44:03,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:44:03,567 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:44:03,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:44:03,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:44:03,569 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:44:03,570 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:44:03,570 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 7 [2021-02-19 18:44:03,571 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:44:03,577 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:44:03,579 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:44:03,579 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:75, output treesize:7 [2021-02-19 18:44:03,603 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:44:03,603 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:44:03,603 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 23 [2021-02-19 18:44:03,603 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203929604] [2021-02-19 18:44:03,603 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-02-19 18:44:03,603 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:44:03,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-02-19 18:44:03,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=468, Unknown=0, NotChecked=0, Total=552 [2021-02-19 18:44:03,604 INFO L87 Difference]: Start difference. First operand 3435 states and 8758 transitions. Second operand has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 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) [2021-02-19 18:44:04,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:44:04,970 INFO L93 Difference]: Finished difference Result 4054 states and 10208 transitions. [2021-02-19 18:44:04,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-02-19 18:44:04,971 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 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) Word has length 30 [2021-02-19 18:44:04,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:44:04,975 INFO L225 Difference]: With dead ends: 4054 [2021-02-19 18:44:04,975 INFO L226 Difference]: Without dead ends: 4023 [2021-02-19 18:44:04,976 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 568 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=339, Invalid=1731, Unknown=0, NotChecked=0, Total=2070 [2021-02-19 18:44:04,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4023 states. [2021-02-19 18:44:05,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4023 to 3674. [2021-02-19 18:44:05,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3674 states, 3673 states have (on average 2.560032670841274) internal successors, (9403), 3673 states have internal predecessors, (9403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:44:05,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3674 states to 3674 states and 9403 transitions. [2021-02-19 18:44:05,014 INFO L78 Accepts]: Start accepts. Automaton has 3674 states and 9403 transitions. Word has length 30 [2021-02-19 18:44:05,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:44:05,014 INFO L480 AbstractCegarLoop]: Abstraction has 3674 states and 9403 transitions. [2021-02-19 18:44:05,014 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 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) [2021-02-19 18:44:05,014 INFO L276 IsEmpty]: Start isEmpty. Operand 3674 states and 9403 transitions. [2021-02-19 18:44:05,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-02-19 18:44:05,017 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:44:05,017 INFO L506 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:44:05,217 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable321 [2021-02-19 18:44:05,217 INFO L428 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:44:05,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:44:05,218 INFO L82 PathProgramCache]: Analyzing trace with hash -268587157, now seen corresponding path program 68 times [2021-02-19 18:44:05,218 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:44:05,218 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94220016] [2021-02-19 18:44:05,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:44:05,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:44:05,552 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:44:05,552 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94220016] [2021-02-19 18:44:05,552 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1934299050] [2021-02-19 18:44:05,552 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 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 [2021-02-19 18:44:05,574 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 18:44:05,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:44:05,575 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2021-02-19 18:44:05,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:44:05,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:44:05,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:44:05,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:44:05,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:44:05,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:44:05,877 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:44:05,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:44:05,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:44:05,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:44:05,880 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:44:05,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:44:05,881 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:44:05,882 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:44:05,882 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 7 [2021-02-19 18:44:05,883 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:44:05,890 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:44:05,891 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:44:05,891 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:75, output treesize:7 [2021-02-19 18:44:05,920 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:44:05,920 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:44:05,920 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 23 [2021-02-19 18:44:05,920 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99375393] [2021-02-19 18:44:05,921 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-02-19 18:44:05,921 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:44:05,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-02-19 18:44:05,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=477, Unknown=0, NotChecked=0, Total=552 [2021-02-19 18:44:05,921 INFO L87 Difference]: Start difference. First operand 3674 states and 9403 transitions. Second operand has 24 states, 24 states have (on average 2.125) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:44:07,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:44:07,836 INFO L93 Difference]: Finished difference Result 4032 states and 10141 transitions. [2021-02-19 18:44:07,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-02-19 18:44:07,837 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-02-19 18:44:07,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:44:07,842 INFO L225 Difference]: With dead ends: 4032 [2021-02-19 18:44:07,842 INFO L226 Difference]: Without dead ends: 4006 [2021-02-19 18:44:07,842 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 673 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=401, Invalid=2251, Unknown=0, NotChecked=0, Total=2652 [2021-02-19 18:44:07,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4006 states. [2021-02-19 18:44:07,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4006 to 3571. [2021-02-19 18:44:07,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3571 states, 3570 states have (on average 2.553781512605042) internal successors, (9117), 3570 states have internal predecessors, (9117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:44:07,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3571 states to 3571 states and 9117 transitions. [2021-02-19 18:44:07,897 INFO L78 Accepts]: Start accepts. Automaton has 3571 states and 9117 transitions. Word has length 30 [2021-02-19 18:44:07,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:44:07,897 INFO L480 AbstractCegarLoop]: Abstraction has 3571 states and 9117 transitions. [2021-02-19 18:44:07,897 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:44:07,897 INFO L276 IsEmpty]: Start isEmpty. Operand 3571 states and 9117 transitions. [2021-02-19 18:44:07,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-02-19 18:44:07,900 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:44:07,900 INFO L506 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:44:08,101 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable322 [2021-02-19 18:44:08,101 INFO L428 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:44:08,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:44:08,101 INFO L82 PathProgramCache]: Analyzing trace with hash 1440791095, now seen corresponding path program 69 times [2021-02-19 18:44:08,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:44:08,101 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956291923] [2021-02-19 18:44:08,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:44:08,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:44:08,527 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 2 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:44:08,527 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956291923] [2021-02-19 18:44:08,527 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1925001993] [2021-02-19 18:44:08,527 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 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 [2021-02-19 18:44:08,551 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-02-19 18:44:08,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:44:08,552 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 39 conjunts are in the unsatisfiable core [2021-02-19 18:44:08,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:44:09,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:44:09,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:44:09,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:44:09,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:44:09,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:44:09,315 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:44:09,316 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:44:09,389 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:44:09,390 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 4 disjoint index pairs (out of 28 index pairs), introduced 6 new quantified variables, introduced 19 case distinctions, treesize of input 69 treesize of output 127 [2021-02-19 18:44:09,649 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 5 xjuncts. [2021-02-19 18:44:09,727 INFO L628 ElimStorePlain]: treesize reduction 254, result has 12.1 percent of original size [2021-02-19 18:44:09,735 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 18:44:09,735 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:91, output treesize:16 [2021-02-19 18:44:09,837 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:44:09,838 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:44:09,838 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 29 [2021-02-19 18:44:09,838 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759665423] [2021-02-19 18:44:09,838 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-02-19 18:44:09,838 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:44:09,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-02-19 18:44:09,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=743, Unknown=0, NotChecked=0, Total=870 [2021-02-19 18:44:09,839 INFO L87 Difference]: Start difference. First operand 3571 states and 9117 transitions. Second operand has 30 states, 30 states have (on average 1.7666666666666666) internal successors, (53), 29 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) [2021-02-19 18:44:15,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:44:15,774 INFO L93 Difference]: Finished difference Result 4918 states and 12146 transitions. [2021-02-19 18:44:15,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-02-19 18:44:15,775 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.7666666666666666) internal successors, (53), 29 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) Word has length 30 [2021-02-19 18:44:15,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:44:15,780 INFO L225 Difference]: With dead ends: 4918 [2021-02-19 18:44:15,780 INFO L226 Difference]: Without dead ends: 4872 [2021-02-19 18:44:15,781 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1067 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=546, Invalid=3114, Unknown=0, NotChecked=0, Total=3660 [2021-02-19 18:44:15,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4872 states. [2021-02-19 18:44:15,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4872 to 3580. [2021-02-19 18:44:15,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3580 states, 3579 states have (on average 2.5523889354568317) internal successors, (9135), 3579 states have internal predecessors, (9135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:44:15,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3580 states to 3580 states and 9135 transitions. [2021-02-19 18:44:15,819 INFO L78 Accepts]: Start accepts. Automaton has 3580 states and 9135 transitions. Word has length 30 [2021-02-19 18:44:15,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:44:15,819 INFO L480 AbstractCegarLoop]: Abstraction has 3580 states and 9135 transitions. [2021-02-19 18:44:15,819 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.7666666666666666) internal successors, (53), 29 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) [2021-02-19 18:44:15,819 INFO L276 IsEmpty]: Start isEmpty. Operand 3580 states and 9135 transitions. [2021-02-19 18:44:15,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-02-19 18:44:15,822 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:44:15,822 INFO L506 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:44:16,022 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable323 [2021-02-19 18:44:16,023 INFO L428 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:44:16,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:44:16,023 INFO L82 PathProgramCache]: Analyzing trace with hash -299624717, now seen corresponding path program 70 times [2021-02-19 18:44:16,023 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:44:16,023 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238415159] [2021-02-19 18:44:16,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:44:16,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:44:16,415 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 2 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:44:16,415 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238415159] [2021-02-19 18:44:16,415 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [902709609] [2021-02-19 18:44:16,416 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 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:44:16,433 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 18:44:16,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:44:16,434 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2021-02-19 18:44:16,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:44:16,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:44:16,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:44:16,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:44:16,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:44:16,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:44:16,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:44:16,763 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:44:16,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:44:16,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:44:16,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:44:16,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:44:16,768 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:44:16,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:44:16,769 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:44:16,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:44:16,771 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:44:16,771 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 7 [2021-02-19 18:44:16,773 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:44:16,780 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:44:16,781 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:44:16,782 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:75, output treesize:7 [2021-02-19 18:44:16,818 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:44:16,818 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:44:16,818 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 24 [2021-02-19 18:44:16,818 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85501901] [2021-02-19 18:44:16,818 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-02-19 18:44:16,818 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:44:16,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-02-19 18:44:16,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=509, Unknown=0, NotChecked=0, Total=600 [2021-02-19 18:44:16,819 INFO L87 Difference]: Start difference. First operand 3580 states and 9135 transitions. Second operand has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 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) [2021-02-19 18:44:18,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:44:18,777 INFO L93 Difference]: Finished difference Result 4728 states and 11773 transitions. [2021-02-19 18:44:18,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-02-19 18:44:18,778 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 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) Word has length 30 [2021-02-19 18:44:18,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:44:18,783 INFO L225 Difference]: With dead ends: 4728 [2021-02-19 18:44:18,783 INFO L226 Difference]: Without dead ends: 4707 [2021-02-19 18:44:18,784 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 767 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=468, Invalid=2394, Unknown=0, NotChecked=0, Total=2862 [2021-02-19 18:44:18,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4707 states. [2021-02-19 18:44:18,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4707 to 3544. [2021-02-19 18:44:18,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3544 states, 3543 states have (on average 2.5563082133784927) internal successors, (9057), 3543 states have internal predecessors, (9057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:44:18,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3544 states to 3544 states and 9057 transitions. [2021-02-19 18:44:18,822 INFO L78 Accepts]: Start accepts. Automaton has 3544 states and 9057 transitions. Word has length 30 [2021-02-19 18:44:18,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:44:18,822 INFO L480 AbstractCegarLoop]: Abstraction has 3544 states and 9057 transitions. [2021-02-19 18:44:18,822 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 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) [2021-02-19 18:44:18,822 INFO L276 IsEmpty]: Start isEmpty. Operand 3544 states and 9057 transitions. [2021-02-19 18:44:18,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-02-19 18:44:18,825 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:44:18,825 INFO L506 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:44:19,025 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable417,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:44:19,026 INFO L428 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:44:19,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:44:19,026 INFO L82 PathProgramCache]: Analyzing trace with hash 174043379, now seen corresponding path program 71 times [2021-02-19 18:44:19,026 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:44:19,026 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234632897] [2021-02-19 18:44:19,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:44:19,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:44:19,429 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:44:19,429 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234632897] [2021-02-19 18:44:19,429 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2047514792] [2021-02-19 18:44:19,429 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 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 [2021-02-19 18:44:19,449 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-02-19 18:44:19,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:44:19,450 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2021-02-19 18:44:19,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:44:19,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:44:19,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:44:19,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:44:19,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:44:19,868 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:44:19,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:44:19,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:44:19,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:44:19,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:44:19,874 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:44:19,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:44:19,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:44:19,877 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:44:19,878 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:44:19,879 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 7 [2021-02-19 18:44:19,880 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:44:19,890 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:44:19,892 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:44:19,892 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:75, output treesize:7 [2021-02-19 18:44:19,929 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:44:19,929 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:44:19,929 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-02-19 18:44:19,929 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671768523] [2021-02-19 18:44:19,929 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-02-19 18:44:19,930 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:44:19,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-02-19 18:44:19,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2021-02-19 18:44:19,930 INFO L87 Difference]: Start difference. First operand 3544 states and 9057 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 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) [2021-02-19 18:44:21,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:44:21,356 INFO L93 Difference]: Finished difference Result 4340 states and 10809 transitions. [2021-02-19 18:44:21,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-02-19 18:44:21,357 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 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) Word has length 30 [2021-02-19 18:44:21,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:44:21,362 INFO L225 Difference]: With dead ends: 4340 [2021-02-19 18:44:21,362 INFO L226 Difference]: Without dead ends: 4303 [2021-02-19 18:44:21,363 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 478 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=251, Invalid=1555, Unknown=0, NotChecked=0, Total=1806 [2021-02-19 18:44:21,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4303 states. [2021-02-19 18:44:21,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4303 to 3774. [2021-02-19 18:44:21,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3774 states, 3773 states have (on average 2.5618870924993375) internal successors, (9666), 3773 states have internal predecessors, (9666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:44:21,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3774 states to 3774 states and 9666 transitions. [2021-02-19 18:44:21,410 INFO L78 Accepts]: Start accepts. Automaton has 3774 states and 9666 transitions. Word has length 30 [2021-02-19 18:44:21,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:44:21,410 INFO L480 AbstractCegarLoop]: Abstraction has 3774 states and 9666 transitions. [2021-02-19 18:44:21,410 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 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) [2021-02-19 18:44:21,411 INFO L276 IsEmpty]: Start isEmpty. Operand 3774 states and 9666 transitions. [2021-02-19 18:44:21,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-02-19 18:44:21,415 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:44:21,415 INFO L506 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:44:21,629 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable418,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:44:21,630 INFO L428 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:44:21,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:44:21,630 INFO L82 PathProgramCache]: Analyzing trace with hash -1895979857, now seen corresponding path program 72 times [2021-02-19 18:44:21,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:44:21,630 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810899960] [2021-02-19 18:44:21,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:44:21,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:44:22,048 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:44:22,048 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810899960] [2021-02-19 18:44:22,048 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [190157767] [2021-02-19 18:44:22,049 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 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 [2021-02-19 18:44:22,069 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-02-19 18:44:22,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:44:22,069 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 39 conjunts are in the unsatisfiable core [2021-02-19 18:44:22,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:44:22,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:44:22,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:44:22,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:44:22,573 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:44:22,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:44:22,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:44:22,585 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:44:22,586 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:44:22,627 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:44:22,627 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 3 disjoint index pairs (out of 28 index pairs), introduced 5 new quantified variables, introduced 13 case distinctions, treesize of input 65 treesize of output 75 [2021-02-19 18:44:22,654 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-02-19 18:44:22,749 INFO L628 ElimStorePlain]: treesize reduction 96, result has 28.4 percent of original size [2021-02-19 18:44:22,757 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:44:22,757 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:90, output treesize:50 [2021-02-19 18:44:22,930 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:44:22,930 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:44:22,930 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17] total 27 [2021-02-19 18:44:22,930 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714285477] [2021-02-19 18:44:22,930 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-02-19 18:44:22,930 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:44:22,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-02-19 18:44:22,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=647, Unknown=0, NotChecked=0, Total=756 [2021-02-19 18:44:22,931 INFO L87 Difference]: Start difference. First operand 3774 states and 9666 transitions. Second operand has 28 states, 28 states have (on average 1.8928571428571428) 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) [2021-02-19 18:44:23,554 WARN L202 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 56 [2021-02-19 18:44:24,080 WARN L202 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 31 [2021-02-19 18:44:24,297 WARN L202 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 34 [2021-02-19 18:44:24,853 WARN L202 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 31 [2021-02-19 18:44:25,195 WARN L202 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 32 [2021-02-19 18:44:25,613 WARN L202 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 38 [2021-02-19 18:44:25,813 WARN L202 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 35 [2021-02-19 18:44:26,278 WARN L202 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 31 [2021-02-19 18:44:27,452 WARN L202 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 42 [2021-02-19 18:44:28,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:44:28,329 INFO L93 Difference]: Finished difference Result 5542 states and 13671 transitions. [2021-02-19 18:44:28,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-02-19 18:44:28,330 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8928571428571428) 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) Word has length 30 [2021-02-19 18:44:28,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:44:28,337 INFO L225 Difference]: With dead ends: 5542 [2021-02-19 18:44:28,337 INFO L226 Difference]: Without dead ends: 5481 [2021-02-19 18:44:28,337 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2120 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=951, Invalid=5529, Unknown=0, NotChecked=0, Total=6480 [2021-02-19 18:44:28,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5481 states. [2021-02-19 18:44:28,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5481 to 3951. [2021-02-19 18:44:28,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3951 states, 3950 states have (on average 2.5582278481012657) internal successors, (10105), 3950 states have internal predecessors, (10105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:44:28,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3951 states to 3951 states and 10105 transitions. [2021-02-19 18:44:28,387 INFO L78 Accepts]: Start accepts. Automaton has 3951 states and 10105 transitions. Word has length 30 [2021-02-19 18:44:28,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:44:28,388 INFO L480 AbstractCegarLoop]: Abstraction has 3951 states and 10105 transitions. [2021-02-19 18:44:28,388 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.8928571428571428) 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) [2021-02-19 18:44:28,388 INFO L276 IsEmpty]: Start isEmpty. Operand 3951 states and 10105 transitions. [2021-02-19 18:44:28,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-02-19 18:44:28,392 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:44:28,392 INFO L506 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:44:28,598 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable419,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:44:28,598 INFO L428 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:44:28,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:44:28,598 INFO L82 PathProgramCache]: Analyzing trace with hash 668217707, now seen corresponding path program 73 times [2021-02-19 18:44:28,598 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:44:28,598 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089275677] [2021-02-19 18:44:28,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:44:28,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:44:28,976 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 18:44:28,977 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089275677] [2021-02-19 18:44:28,977 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1035606635] [2021-02-19 18:44:28,977 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 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 [2021-02-19 18:44:28,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:44:28,996 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2021-02-19 18:44:28,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:44:29,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:44:29,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:44:29,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:44:29,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:44:29,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:44:29,350 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:44:29,351 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:44:29,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:44:29,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:44:29,354 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:44:29,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:44:29,356 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:44:29,356 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 7 [2021-02-19 18:44:29,358 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:44:29,365 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:44:29,366 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:44:29,366 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:75, output treesize:7 [2021-02-19 18:44:29,398 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:44:29,398 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:44:29,398 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-02-19 18:44:29,398 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167249709] [2021-02-19 18:44:29,398 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-02-19 18:44:29,398 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:44:29,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-02-19 18:44:29,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2021-02-19 18:44:29,399 INFO L87 Difference]: Start difference. First operand 3951 states and 10105 transitions. Second operand has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:44:32,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:44:32,656 INFO L93 Difference]: Finished difference Result 4832 states and 12072 transitions. [2021-02-19 18:44:32,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-02-19 18:44:32,657 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-02-19 18:44:32,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:44:32,664 INFO L225 Difference]: With dead ends: 4832 [2021-02-19 18:44:32,664 INFO L226 Difference]: Without dead ends: 4757 [2021-02-19 18:44:32,664 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 973 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=498, Invalid=3162, Unknown=0, NotChecked=0, Total=3660 [2021-02-19 18:44:32,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4757 states. [2021-02-19 18:44:32,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4757 to 4047. [2021-02-19 18:44:32,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4047 states, 4046 states have (on average 2.5504201680672267) internal successors, (10319), 4046 states have internal predecessors, (10319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:44:32,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4047 states to 4047 states and 10319 transitions. [2021-02-19 18:44:32,711 INFO L78 Accepts]: Start accepts. Automaton has 4047 states and 10319 transitions. Word has length 30 [2021-02-19 18:44:32,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:44:32,711 INFO L480 AbstractCegarLoop]: Abstraction has 4047 states and 10319 transitions. [2021-02-19 18:44:32,711 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:44:32,711 INFO L276 IsEmpty]: Start isEmpty. Operand 4047 states and 10319 transitions. [2021-02-19 18:44:32,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-02-19 18:44:32,715 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:44:32,715 INFO L506 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:44:32,915 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable430 [2021-02-19 18:44:32,916 INFO L428 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:44:32,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:44:32,916 INFO L82 PathProgramCache]: Analyzing trace with hash -1230273105, now seen corresponding path program 74 times [2021-02-19 18:44:32,916 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:44:32,916 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833509281] [2021-02-19 18:44:32,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:44:32,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:44:33,332 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 18:44:33,333 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833509281] [2021-02-19 18:44:33,333 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [422112334] [2021-02-19 18:44:33,333 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 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 [2021-02-19 18:44:33,351 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 18:44:33,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:44:33,352 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2021-02-19 18:44:33,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:44:33,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:44:33,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:44:33,720 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:44:33,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:44:33,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:44:33,723 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:44:33,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:44:33,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:44:33,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:44:33,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:44:33,728 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:44:33,728 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:44:33,729 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 7 [2021-02-19 18:44:33,730 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:44:33,738 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:44:33,740 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:44:33,740 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:75, output treesize:7 [2021-02-19 18:44:33,774 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:44:33,774 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:44:33,774 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-02-19 18:44:33,775 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252152780] [2021-02-19 18:44:33,775 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-02-19 18:44:33,775 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:44:33,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-02-19 18:44:33,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2021-02-19 18:44:33,775 INFO L87 Difference]: Start difference. First operand 4047 states and 10319 transitions. Second operand has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:44:36,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:44:36,839 INFO L93 Difference]: Finished difference Result 4590 states and 11529 transitions. [2021-02-19 18:44:36,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-02-19 18:44:36,840 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-02-19 18:44:36,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:44:36,845 INFO L225 Difference]: With dead ends: 4590 [2021-02-19 18:44:36,845 INFO L226 Difference]: Without dead ends: 4548 [2021-02-19 18:44:36,846 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 690 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=372, Invalid=2490, Unknown=0, NotChecked=0, Total=2862 [2021-02-19 18:44:36,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4548 states. [2021-02-19 18:44:36,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4548 to 4096. [2021-02-19 18:44:36,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4096 states, 4095 states have (on average 2.547008547008547) internal successors, (10430), 4095 states have internal predecessors, (10430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:44:36,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4096 states to 4096 states and 10430 transitions. [2021-02-19 18:44:36,922 INFO L78 Accepts]: Start accepts. Automaton has 4096 states and 10430 transitions. Word has length 30 [2021-02-19 18:44:36,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:44:36,922 INFO L480 AbstractCegarLoop]: Abstraction has 4096 states and 10430 transitions. [2021-02-19 18:44:36,923 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:44:36,923 INFO L276 IsEmpty]: Start isEmpty. Operand 4096 states and 10430 transitions. [2021-02-19 18:44:36,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-02-19 18:44:36,927 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:44:36,927 INFO L506 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:44:37,136 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable431,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:44:37,136 INFO L428 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:44:37,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:44:37,137 INFO L82 PathProgramCache]: Analyzing trace with hash -1436211537, now seen corresponding path program 75 times [2021-02-19 18:44:37,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:44:37,137 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474047343] [2021-02-19 18:44:37,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:44:37,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:44:37,717 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:44:37,717 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474047343] [2021-02-19 18:44:37,717 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [654583825] [2021-02-19 18:44:37,718 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 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 [2021-02-19 18:44:37,743 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-02-19 18:44:37,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:44:37,744 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 39 conjunts are in the unsatisfiable core [2021-02-19 18:44:37,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:44:38,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:44:38,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:44:38,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:44:38,529 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:44:38,533 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:44:38,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:44:38,614 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:44:38,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 3 disjoint index pairs (out of 28 index pairs), introduced 6 new quantified variables, introduced 20 case distinctions, treesize of input 69 treesize of output 137 [2021-02-19 18:44:38,978 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 5 xjuncts. [2021-02-19 18:44:39,177 WARN L202 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 26 [2021-02-19 18:44:39,178 INFO L628 ElimStorePlain]: treesize reduction 699, result has 5.2 percent of original size [2021-02-19 18:44:39,195 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:44:39,195 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:94, output treesize:50 [2021-02-19 18:44:39,375 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:44:39,375 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:44:39,375 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17] total 28 [2021-02-19 18:44:39,376 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082061486] [2021-02-19 18:44:39,376 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-02-19 18:44:39,376 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:44:39,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-02-19 18:44:39,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=717, Unknown=0, NotChecked=0, Total=812 [2021-02-19 18:44:39,376 INFO L87 Difference]: Start difference. First operand 4096 states and 10430 transitions. Second operand has 29 states, 29 states have (on average 1.8275862068965518) internal successors, (53), 28 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) [2021-02-19 18:44:40,072 WARN L202 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 30 [2021-02-19 18:44:40,772 WARN L202 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 40 [2021-02-19 18:44:41,542 WARN L202 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 29 [2021-02-19 18:44:41,741 WARN L202 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 28 [2021-02-19 18:44:42,117 WARN L202 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 50 [2021-02-19 18:44:42,400 WARN L202 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 31 [2021-02-19 18:44:43,422 WARN L202 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 38 [2021-02-19 18:44:43,594 WARN L202 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 40 [2021-02-19 18:44:44,186 WARN L202 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 57 [2021-02-19 18:44:44,883 WARN L202 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 64 [2021-02-19 18:44:45,126 WARN L202 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 48 [2021-02-19 18:44:46,479 WARN L202 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 54 [2021-02-19 18:44:46,751 WARN L202 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 35 [2021-02-19 18:44:48,738 WARN L202 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 59 [2021-02-19 18:44:53,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:44:53,494 INFO L93 Difference]: Finished difference Result 5448 states and 13472 transitions. [2021-02-19 18:44:53,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-02-19 18:44:53,496 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.8275862068965518) internal successors, (53), 28 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) Word has length 30 [2021-02-19 18:44:53,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:44:53,503 INFO L225 Difference]: With dead ends: 5448 [2021-02-19 18:44:53,503 INFO L226 Difference]: Without dead ends: 5389 [2021-02-19 18:44:53,503 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1952 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=840, Invalid=5802, Unknown=0, NotChecked=0, Total=6642 [2021-02-19 18:44:53,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5389 states. [2021-02-19 18:44:53,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5389 to 4187. [2021-02-19 18:44:53,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4187 states, 4186 states have (on average 2.542761586239847) internal successors, (10644), 4186 states have internal predecessors, (10644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:44:53,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4187 states to 4187 states and 10644 transitions. [2021-02-19 18:44:53,546 INFO L78 Accepts]: Start accepts. Automaton has 4187 states and 10644 transitions. Word has length 30 [2021-02-19 18:44:53,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:44:53,546 INFO L480 AbstractCegarLoop]: Abstraction has 4187 states and 10644 transitions. [2021-02-19 18:44:53,546 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.8275862068965518) internal successors, (53), 28 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) [2021-02-19 18:44:53,547 INFO L276 IsEmpty]: Start isEmpty. Operand 4187 states and 10644 transitions. [2021-02-19 18:44:53,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-02-19 18:44:53,550 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:44:53,550 INFO L506 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:44:53,750 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable432 [2021-02-19 18:44:53,751 INFO L428 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:44:53,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:44:53,751 INFO L82 PathProgramCache]: Analyzing trace with hash -1568712961, now seen corresponding path program 76 times [2021-02-19 18:44:53,751 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:44:53,751 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80473096] [2021-02-19 18:44:53,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:44:53,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:44:54,546 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:44:54,547 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80473096] [2021-02-19 18:44:54,547 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [42644727] [2021-02-19 18:44:54,547 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 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 [2021-02-19 18:44:54,565 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 18:44:54,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:44:54,566 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2021-02-19 18:44:54,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:44:55,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:44:55,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:44:55,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:44:55,090 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:44:55,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:44:55,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:44:55,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:44:55,095 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:44:55,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:44:55,097 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:44:55,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:44:55,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:44:55,101 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:44:55,102 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 7 [2021-02-19 18:44:55,104 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:44:55,114 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:44:55,115 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:44:55,116 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:75, output treesize:7 [2021-02-19 18:44:55,157 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:44:55,157 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:44:55,157 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 24 [2021-02-19 18:44:55,157 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041725416] [2021-02-19 18:44:55,157 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-02-19 18:44:55,158 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:44:55,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-02-19 18:44:55,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2021-02-19 18:44:55,158 INFO L87 Difference]: Start difference. First operand 4187 states and 10644 transitions. Second operand has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 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) [2021-02-19 18:44:58,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:44:58,595 INFO L93 Difference]: Finished difference Result 5642 states and 13873 transitions. [2021-02-19 18:44:58,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-02-19 18:44:58,597 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 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) Word has length 30 [2021-02-19 18:44:58,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:44:58,603 INFO L225 Difference]: With dead ends: 5642 [2021-02-19 18:44:58,603 INFO L226 Difference]: Without dead ends: 5593 [2021-02-19 18:44:58,604 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 696 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=389, Invalid=2473, Unknown=0, NotChecked=0, Total=2862 [2021-02-19 18:44:58,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5593 states. [2021-02-19 18:44:58,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5593 to 4299. [2021-02-19 18:44:58,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4299 states, 4298 states have (on average 2.5418799441600743) internal successors, (10925), 4298 states have internal predecessors, (10925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:44:58,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4299 states to 4299 states and 10925 transitions. [2021-02-19 18:44:58,647 INFO L78 Accepts]: Start accepts. Automaton has 4299 states and 10925 transitions. Word has length 30 [2021-02-19 18:44:58,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:44:58,647 INFO L480 AbstractCegarLoop]: Abstraction has 4299 states and 10925 transitions. [2021-02-19 18:44:58,647 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 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) [2021-02-19 18:44:58,647 INFO L276 IsEmpty]: Start isEmpty. Operand 4299 states and 10925 transitions. [2021-02-19 18:44:58,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-02-19 18:44:58,651 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:44:58,651 INFO L506 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:44:58,865 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable557 [2021-02-19 18:44:58,866 INFO L428 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:44:58,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:44:58,866 INFO L82 PathProgramCache]: Analyzing trace with hash -79360837, now seen corresponding path program 77 times [2021-02-19 18:44:58,866 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:44:58,866 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686236073] [2021-02-19 18:44:58,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:44:58,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:44:59,504 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:44:59,504 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686236073] [2021-02-19 18:44:59,504 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2083453879] [2021-02-19 18:44:59,504 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 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 [2021-02-19 18:44:59,524 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-02-19 18:44:59,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:44:59,525 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2021-02-19 18:44:59,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:45:00,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:45:00,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:45:00,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:45:00,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:45:00,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:45:00,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:45:00,037 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:45:00,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:45:00,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:45:00,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:45:00,042 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:45:00,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:45:00,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:45:00,045 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:45:00,046 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:45:00,047 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 7 [2021-02-19 18:45:00,050 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:45:00,063 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:45:00,066 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:45:00,066 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:75, output treesize:7 [2021-02-19 18:45:00,121 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:45:00,121 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:45:00,121 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 24 [2021-02-19 18:45:00,121 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45656436] [2021-02-19 18:45:00,121 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-02-19 18:45:00,121 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:45:00,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-02-19 18:45:00,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=518, Unknown=0, NotChecked=0, Total=600 [2021-02-19 18:45:00,122 INFO L87 Difference]: Start difference. First operand 4299 states and 10925 transitions. Second operand has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 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) [2021-02-19 18:45:03,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:45:03,672 INFO L93 Difference]: Finished difference Result 5438 states and 13503 transitions. [2021-02-19 18:45:03,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-02-19 18:45:03,674 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 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) Word has length 30 [2021-02-19 18:45:03,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:45:03,680 INFO L225 Difference]: With dead ends: 5438 [2021-02-19 18:45:03,680 INFO L226 Difference]: Without dead ends: 5387 [2021-02-19 18:45:03,681 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 589 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=333, Invalid=2117, Unknown=0, NotChecked=0, Total=2450 [2021-02-19 18:45:03,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5387 states. [2021-02-19 18:45:03,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5387 to 4354. [2021-02-19 18:45:03,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4354 states, 4353 states have (on average 2.535722490236618) internal successors, (11038), 4353 states have internal predecessors, (11038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:45:03,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4354 states to 4354 states and 11038 transitions. [2021-02-19 18:45:03,723 INFO L78 Accepts]: Start accepts. Automaton has 4354 states and 11038 transitions. Word has length 30 [2021-02-19 18:45:03,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:45:03,723 INFO L480 AbstractCegarLoop]: Abstraction has 4354 states and 11038 transitions. [2021-02-19 18:45:03,724 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 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) [2021-02-19 18:45:03,724 INFO L276 IsEmpty]: Start isEmpty. Operand 4354 states and 11038 transitions. [2021-02-19 18:45:03,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-02-19 18:45:03,727 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:45:03,727 INFO L506 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:45:03,928 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable558 [2021-02-19 18:45:03,928 INFO L428 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:45:03,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:45:03,928 INFO L82 PathProgramCache]: Analyzing trace with hash 873254387, now seen corresponding path program 78 times [2021-02-19 18:45:03,928 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:45:03,928 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542109331] [2021-02-19 18:45:03,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:45:03,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:45:04,441 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:45:04,441 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542109331] [2021-02-19 18:45:04,441 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1733553130] [2021-02-19 18:45:04,441 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 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 [2021-02-19 18:45:04,462 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-02-19 18:45:04,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:45:04,463 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 39 conjunts are in the unsatisfiable core [2021-02-19 18:45:04,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:45:05,368 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:45:05,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:45:05,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:45:05,384 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:45:05,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:45:05,392 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:45:05,458 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:45:05,458 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 3 disjoint index pairs (out of 28 index pairs), introduced 5 new quantified variables, introduced 13 case distinctions, treesize of input 65 treesize of output 75 [2021-02-19 18:45:05,481 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-02-19 18:45:05,580 INFO L628 ElimStorePlain]: treesize reduction 90, result has 28.0 percent of original size [2021-02-19 18:45:05,590 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 18:45:05,590 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:87, output treesize:16 [2021-02-19 18:45:05,710 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:45:05,710 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:45:05,710 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17] total 27 [2021-02-19 18:45:05,710 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794431750] [2021-02-19 18:45:05,710 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-02-19 18:45:05,710 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:45:05,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-02-19 18:45:05,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=647, Unknown=0, NotChecked=0, Total=756 [2021-02-19 18:45:05,711 INFO L87 Difference]: Start difference. First operand 4354 states and 11038 transitions. Second operand has 28 states, 28 states have (on average 1.8928571428571428) 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) [2021-02-19 18:45:09,121 WARN L202 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 31 [2021-02-19 18:45:09,692 WARN L202 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 31 [2021-02-19 18:45:12,320 WARN L202 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 44 [2021-02-19 18:45:13,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:45:13,315 INFO L93 Difference]: Finished difference Result 5792 states and 14294 transitions. [2021-02-19 18:45:13,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-02-19 18:45:13,316 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8928571428571428) 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) Word has length 30 [2021-02-19 18:45:13,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:45:13,323 INFO L225 Difference]: With dead ends: 5792 [2021-02-19 18:45:13,323 INFO L226 Difference]: Without dead ends: 5753 [2021-02-19 18:45:13,324 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1623 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=713, Invalid=4543, Unknown=0, NotChecked=0, Total=5256 [2021-02-19 18:45:13,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5753 states. [2021-02-19 18:45:13,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5753 to 4546. [2021-02-19 18:45:13,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4546 states, 4545 states have (on average 2.541034103410341) internal successors, (11549), 4545 states have internal predecessors, (11549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:45:13,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4546 states to 4546 states and 11549 transitions. [2021-02-19 18:45:13,371 INFO L78 Accepts]: Start accepts. Automaton has 4546 states and 11549 transitions. Word has length 30 [2021-02-19 18:45:13,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:45:13,372 INFO L480 AbstractCegarLoop]: Abstraction has 4546 states and 11549 transitions. [2021-02-19 18:45:13,372 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.8928571428571428) 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) [2021-02-19 18:45:13,372 INFO L276 IsEmpty]: Start isEmpty. Operand 4546 states and 11549 transitions. [2021-02-19 18:45:13,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-02-19 18:45:13,375 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:45:13,375 INFO L506 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:45:13,576 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable559,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:45:13,576 INFO L428 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:45:13,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:45:13,577 INFO L82 PathProgramCache]: Analyzing trace with hash -1427247753, now seen corresponding path program 79 times [2021-02-19 18:45:13,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:45:13,577 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570736432] [2021-02-19 18:45:13,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:45:13,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:45:14,140 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:45:14,140 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570736432] [2021-02-19 18:45:14,140 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1835923402] [2021-02-19 18:45:14,140 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 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 [2021-02-19 18:45:14,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:45:14,160 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2021-02-19 18:45:14,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:45:14,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:45:14,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:45:14,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:45:14,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:45:14,732 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:45:14,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:45:14,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:45:14,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:45:14,738 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:45:14,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:45:14,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:45:14,742 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:45:14,743 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:45:14,744 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 7 [2021-02-19 18:45:14,746 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:45:14,758 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:45:14,761 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:45:14,761 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:75, output treesize:7 [2021-02-19 18:45:14,816 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:45:14,817 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:45:14,817 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-02-19 18:45:14,817 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893303500] [2021-02-19 18:45:14,817 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-02-19 18:45:14,817 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:45:14,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-02-19 18:45:14,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2021-02-19 18:45:14,818 INFO L87 Difference]: Start difference. First operand 4546 states and 11549 transitions. Second operand has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:45:15,548 WARN L202 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 29 [2021-02-19 18:45:16,066 WARN L202 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 28 [2021-02-19 18:45:16,472 WARN L202 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 29 [2021-02-19 18:45:16,842 WARN L202 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 34 [2021-02-19 18:45:17,539 WARN L202 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 36 [2021-02-19 18:45:18,234 WARN L202 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 41 [2021-02-19 18:45:19,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:45:19,894 INFO L93 Difference]: Finished difference Result 5385 states and 13364 transitions. [2021-02-19 18:45:19,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-02-19 18:45:19,895 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-02-19 18:45:19,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:45:19,902 INFO L225 Difference]: With dead ends: 5385 [2021-02-19 18:45:19,902 INFO L226 Difference]: Without dead ends: 5328 [2021-02-19 18:45:19,903 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 981 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=543, Invalid=2997, Unknown=0, NotChecked=0, Total=3540 [2021-02-19 18:45:19,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5328 states. [2021-02-19 18:45:19,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5328 to 4639. [2021-02-19 18:45:19,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4639 states, 4638 states have (on average 2.5433376455368695) internal successors, (11796), 4638 states have internal predecessors, (11796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:45:19,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4639 states to 4639 states and 11796 transitions. [2021-02-19 18:45:19,952 INFO L78 Accepts]: Start accepts. Automaton has 4639 states and 11796 transitions. Word has length 30 [2021-02-19 18:45:19,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:45:19,952 INFO L480 AbstractCegarLoop]: Abstraction has 4639 states and 11796 transitions. [2021-02-19 18:45:19,952 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:45:19,952 INFO L276 IsEmpty]: Start isEmpty. Operand 4639 states and 11796 transitions. [2021-02-19 18:45:19,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-02-19 18:45:19,956 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:45:19,956 INFO L506 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:45:20,156 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable569 [2021-02-19 18:45:20,156 INFO L428 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:45:20,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:45:20,157 INFO L82 PathProgramCache]: Analyzing trace with hash -2091356229, now seen corresponding path program 80 times [2021-02-19 18:45:20,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:45:20,157 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202316603] [2021-02-19 18:45:20,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:45:20,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:45:20,829 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 6 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:45:20,829 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202316603] [2021-02-19 18:45:20,829 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1294558466] [2021-02-19 18:45:20,830 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 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 [2021-02-19 18:45:20,848 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 18:45:20,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:45:20,849 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2021-02-19 18:45:20,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:45:21,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:45:21,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:45:21,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:45:21,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:45:21,539 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:45:21,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:45:21,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:45:21,544 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:45:21,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:45:21,547 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:45:21,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:45:21,551 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:45:21,552 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 7 [2021-02-19 18:45:21,555 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:45:21,570 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:45:21,573 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:45:21,573 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:75, output treesize:7 [2021-02-19 18:45:21,632 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:45:21,632 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:45:21,632 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 24 [2021-02-19 18:45:21,632 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934656986] [2021-02-19 18:45:21,632 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-02-19 18:45:21,632 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:45:21,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-02-19 18:45:21,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=514, Unknown=0, NotChecked=0, Total=600 [2021-02-19 18:45:21,633 INFO L87 Difference]: Start difference. First operand 4639 states and 11796 transitions. Second operand has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 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) [2021-02-19 18:45:22,654 WARN L202 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 33 [2021-02-19 18:45:24,943 WARN L202 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 48 [2021-02-19 18:45:25,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:45:25,579 INFO L93 Difference]: Finished difference Result 5863 states and 14459 transitions. [2021-02-19 18:45:25,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-02-19 18:45:25,581 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 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) Word has length 30 [2021-02-19 18:45:25,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:45:25,588 INFO L225 Difference]: With dead ends: 5863 [2021-02-19 18:45:25,588 INFO L226 Difference]: Without dead ends: 5822 [2021-02-19 18:45:25,588 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 774 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=420, Invalid=2336, Unknown=0, NotChecked=0, Total=2756 [2021-02-19 18:45:25,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5822 states. [2021-02-19 18:45:25,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5822 to 4655. [2021-02-19 18:45:25,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4655 states, 4654 states have (on average 2.545122475290073) internal successors, (11845), 4654 states have internal predecessors, (11845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:45:25,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4655 states to 4655 states and 11845 transitions. [2021-02-19 18:45:25,643 INFO L78 Accepts]: Start accepts. Automaton has 4655 states and 11845 transitions. Word has length 30 [2021-02-19 18:45:25,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:45:25,644 INFO L480 AbstractCegarLoop]: Abstraction has 4655 states and 11845 transitions. [2021-02-19 18:45:25,644 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 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) [2021-02-19 18:45:25,644 INFO L276 IsEmpty]: Start isEmpty. Operand 4655 states and 11845 transitions. [2021-02-19 18:45:25,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-02-19 18:45:25,648 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:45:25,648 INFO L506 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:45:25,848 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable570,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:45:25,849 INFO L428 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:45:25,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:45:25,849 INFO L82 PathProgramCache]: Analyzing trace with hash -1737208333, now seen corresponding path program 81 times [2021-02-19 18:45:25,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:45:25,849 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814896636] [2021-02-19 18:45:25,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:45:25,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:45:26,366 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 18:45:26,366 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814896636] [2021-02-19 18:45:26,366 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [498478355] [2021-02-19 18:45:26,366 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 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 [2021-02-19 18:45:26,386 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-02-19 18:45:26,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:45:26,387 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 41 conjunts are in the unsatisfiable core [2021-02-19 18:45:26,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:45:27,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:45:27,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:45:27,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:45:27,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:45:27,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:45:27,515 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:45:27,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:45:27,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:45:27,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:45:27,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:45:27,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:45:27,599 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:45:27,599 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 15 disjoint index pairs (out of 28 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 65 treesize of output 79 [2021-02-19 18:45:27,625 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-02-19 18:45:27,673 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:45:27,680 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:45:27,681 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:85, output treesize:21 [2021-02-19 18:45:27,858 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:45:27,859 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:45:27,859 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17] total 27 [2021-02-19 18:45:27,859 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87740978] [2021-02-19 18:45:27,859 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-02-19 18:45:27,859 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:45:27,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-02-19 18:45:27,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=654, Unknown=0, NotChecked=0, Total=756 [2021-02-19 18:45:27,860 INFO L87 Difference]: Start difference. First operand 4655 states and 11845 transitions. Second operand has 28 states, 28 states have (on average 1.8928571428571428) 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) [2021-02-19 18:45:30,088 WARN L202 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 39 [2021-02-19 18:45:30,888 WARN L202 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 39 [2021-02-19 18:45:32,362 WARN L202 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 45 [2021-02-19 18:45:32,679 WARN L202 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 46 [2021-02-19 18:45:33,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:45:33,826 INFO L93 Difference]: Finished difference Result 5156 states and 12926 transitions. [2021-02-19 18:45:33,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-02-19 18:45:33,828 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8928571428571428) 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) Word has length 30 [2021-02-19 18:45:33,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:45:33,835 INFO L225 Difference]: With dead ends: 5156 [2021-02-19 18:45:33,835 INFO L226 Difference]: Without dead ends: 5130 [2021-02-19 18:45:33,836 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 730 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=368, Invalid=2602, Unknown=0, NotChecked=0, Total=2970 [2021-02-19 18:45:33,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5130 states. [2021-02-19 18:45:33,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5130 to 4730. [2021-02-19 18:45:33,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4730 states, 4729 states have (on average 2.5470501163036583) internal successors, (12045), 4729 states have internal predecessors, (12045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:45:33,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4730 states to 4730 states and 12045 transitions. [2021-02-19 18:45:33,886 INFO L78 Accepts]: Start accepts. Automaton has 4730 states and 12045 transitions. Word has length 30 [2021-02-19 18:45:33,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:45:33,886 INFO L480 AbstractCegarLoop]: Abstraction has 4730 states and 12045 transitions. [2021-02-19 18:45:33,886 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.8928571428571428) 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) [2021-02-19 18:45:33,886 INFO L276 IsEmpty]: Start isEmpty. Operand 4730 states and 12045 transitions. [2021-02-19 18:45:33,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-02-19 18:45:33,890 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:45:33,890 INFO L506 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:45:34,090 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable571,83 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:45:34,091 INFO L428 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:45:34,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:45:34,091 INFO L82 PathProgramCache]: Analyzing trace with hash 257256823, now seen corresponding path program 82 times [2021-02-19 18:45:34,091 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:45:34,091 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547273137] [2021-02-19 18:45:34,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:45:34,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:45:34,689 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 18:45:34,690 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547273137] [2021-02-19 18:45:34,690 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1541642361] [2021-02-19 18:45:34,690 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 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 [2021-02-19 18:45:34,717 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 18:45:34,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:45:34,718 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2021-02-19 18:45:34,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:45:35,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:45:35,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:45:35,320 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:45:35,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:45:35,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:45:35,324 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:45:35,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:45:35,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:45:35,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:45:35,331 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:45:35,332 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:45:35,333 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 7 [2021-02-19 18:45:35,335 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:45:35,349 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:45:35,352 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:45:35,352 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:75, output treesize:7 [2021-02-19 18:45:35,422 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:45:35,422 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:45:35,423 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-02-19 18:45:35,423 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589503968] [2021-02-19 18:45:35,423 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-02-19 18:45:35,423 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:45:35,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-02-19 18:45:35,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2021-02-19 18:45:35,423 INFO L87 Difference]: Start difference. First operand 4730 states and 12045 transitions. Second operand has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:45:36,217 WARN L202 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 33 [2021-02-19 18:45:36,797 WARN L202 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 36 [2021-02-19 18:45:37,415 WARN L202 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 34 [2021-02-19 18:45:38,965 WARN L202 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 41 [2021-02-19 18:45:39,454 WARN L202 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 38 [2021-02-19 18:45:40,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:45:40,683 INFO L93 Difference]: Finished difference Result 5448 states and 13572 transitions. [2021-02-19 18:45:40,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-02-19 18:45:40,686 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-02-19 18:45:40,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:45:40,693 INFO L225 Difference]: With dead ends: 5448 [2021-02-19 18:45:40,693 INFO L226 Difference]: Without dead ends: 5389 [2021-02-19 18:45:40,693 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 934 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=532, Invalid=2890, Unknown=0, NotChecked=0, Total=3422 [2021-02-19 18:45:40,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5389 states. [2021-02-19 18:45:40,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5389 to 4607. [2021-02-19 18:45:40,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4607 states, 4606 states have (on average 2.5432045158488927) internal successors, (11714), 4606 states have internal predecessors, (11714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:45:40,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4607 states to 4607 states and 11714 transitions. [2021-02-19 18:45:40,744 INFO L78 Accepts]: Start accepts. Automaton has 4607 states and 11714 transitions. Word has length 30 [2021-02-19 18:45:40,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:45:40,744 INFO L480 AbstractCegarLoop]: Abstraction has 4607 states and 11714 transitions. [2021-02-19 18:45:40,744 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:45:40,744 INFO L276 IsEmpty]: Start isEmpty. Operand 4607 states and 11714 transitions. [2021-02-19 18:45:40,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-02-19 18:45:40,748 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:45:40,748 INFO L506 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:45:40,948 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable579 [2021-02-19 18:45:40,949 INFO L428 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:45:40,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:45:40,949 INFO L82 PathProgramCache]: Analyzing trace with hash -981454281, now seen corresponding path program 83 times [2021-02-19 18:45:40,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:45:40,949 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568713073] [2021-02-19 18:45:40,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:45:40,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:45:41,536 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 18:45:41,537 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568713073] [2021-02-19 18:45:41,537 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1187258409] [2021-02-19 18:45:41,537 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 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 [2021-02-19 18:45:41,557 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-02-19 18:45:41,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:45:41,558 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2021-02-19 18:45:41,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:45:42,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:45:42,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:45:42,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:45:42,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:45:42,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:45:42,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:45:42,229 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:45:42,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:45:42,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:45:42,235 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:45:42,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:45:42,240 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:45:42,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:45:42,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:45:42,247 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:45:42,248 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 7 [2021-02-19 18:45:42,252 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:45:42,270 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:45:42,274 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:45:42,274 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:75, output treesize:7 [2021-02-19 18:45:42,342 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:45:42,342 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:45:42,342 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-02-19 18:45:42,342 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652773172] [2021-02-19 18:45:42,343 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-02-19 18:45:42,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:45:42,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-02-19 18:45:42,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2021-02-19 18:45:42,343 INFO L87 Difference]: Start difference. First operand 4607 states and 11714 transitions. Second operand has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 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) [2021-02-19 18:45:43,761 WARN L202 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 37 [2021-02-19 18:45:45,537 WARN L202 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 43 [2021-02-19 18:45:45,880 WARN L202 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 28 [2021-02-19 18:45:46,460 WARN L202 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 39 [2021-02-19 18:45:47,025 WARN L202 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 39 [2021-02-19 18:45:47,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:45:47,968 INFO L93 Difference]: Finished difference Result 5022 states and 12567 transitions. [2021-02-19 18:45:47,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-02-19 18:45:47,969 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 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) Word has length 30 [2021-02-19 18:45:47,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:45:47,975 INFO L225 Difference]: With dead ends: 5022 [2021-02-19 18:45:47,975 INFO L226 Difference]: Without dead ends: 4967 [2021-02-19 18:45:47,976 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1204 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=506, Invalid=3526, Unknown=0, NotChecked=0, Total=4032 [2021-02-19 18:45:47,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4967 states. [2021-02-19 18:45:48,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4967 to 4713. [2021-02-19 18:45:48,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4713 states, 4712 states have (on average 2.5367147707979627) internal successors, (11953), 4712 states have internal predecessors, (11953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:45:48,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4713 states to 4713 states and 11953 transitions. [2021-02-19 18:45:48,035 INFO L78 Accepts]: Start accepts. Automaton has 4713 states and 11953 transitions. Word has length 30 [2021-02-19 18:45:48,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:45:48,035 INFO L480 AbstractCegarLoop]: Abstraction has 4713 states and 11953 transitions. [2021-02-19 18:45:48,035 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 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) [2021-02-19 18:45:48,035 INFO L276 IsEmpty]: Start isEmpty. Operand 4713 states and 11953 transitions. [2021-02-19 18:45:48,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-02-19 18:45:48,040 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:45:48,040 INFO L506 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:45:48,246 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable580,85 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:45:48,246 INFO L428 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:45:48,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:45:48,246 INFO L82 PathProgramCache]: Analyzing trace with hash -2082961545, now seen corresponding path program 84 times [2021-02-19 18:45:48,246 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:45:48,246 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619167920] [2021-02-19 18:45:48,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:45:48,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:45:48,816 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:45:48,816 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619167920] [2021-02-19 18:45:48,816 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [763737689] [2021-02-19 18:45:48,816 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 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 [2021-02-19 18:45:48,838 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-02-19 18:45:48,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:45:48,838 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 39 conjunts are in the unsatisfiable core [2021-02-19 18:45:48,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:45:52,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:45:52,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:45:52,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:45:52,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:45:52,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:45:52,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:45:52,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:45:52,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:45:52,164 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:45:52,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:45:52,298 WARN L202 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2021-02-19 18:45:52,298 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:45:52,299 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 9 disjoint index pairs (out of 28 index pairs), introduced 7 new quantified variables, introduced 18 case distinctions, treesize of input 73 treesize of output 141 [2021-02-19 18:45:52,797 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 6 xjuncts. [2021-02-19 18:45:52,919 WARN L202 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 23 [2021-02-19 18:45:52,920 INFO L628 ElimStorePlain]: treesize reduction 235, result has 13.0 percent of original size [2021-02-19 18:45:52,929 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 18:45:52,929 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:95, output treesize:22 [2021-02-19 18:45:53,053 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:45:53,054 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:45:53,054 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17] total 27 [2021-02-19 18:45:53,054 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726720451] [2021-02-19 18:45:53,054 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-02-19 18:45:53,054 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:45:53,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-02-19 18:45:53,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=663, Unknown=0, NotChecked=0, Total=756 [2021-02-19 18:45:53,054 INFO L87 Difference]: Start difference. First operand 4713 states and 11953 transitions. Second operand has 28 states, 28 states have (on average 1.8928571428571428) 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) [2021-02-19 18:45:56,840 WARN L202 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 43 [2021-02-19 18:45:57,796 WARN L202 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 45 [2021-02-19 18:45:59,453 WARN L202 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 46 [2021-02-19 18:45:59,820 WARN L202 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 47 [2021-02-19 18:46:01,323 WARN L202 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 29 [2021-02-19 18:46:02,026 WARN L202 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 48 [2021-02-19 18:46:11,045 WARN L202 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 38 [2021-02-19 18:46:13,660 WARN L202 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 46 [2021-02-19 18:46:14,026 WARN L202 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 44 [2021-02-19 18:46:14,366 WARN L202 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2021-02-19 18:46:17,285 WARN L202 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 18 [2021-02-19 18:46:17,609 WARN L202 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 26 [2021-02-19 18:46:20,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:46:20,181 INFO L93 Difference]: Finished difference Result 6090 states and 15009 transitions. [2021-02-19 18:46:20,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-02-19 18:46:20,185 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8928571428571428) 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) Word has length 30 [2021-02-19 18:46:20,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:46:20,193 INFO L225 Difference]: With dead ends: 6090 [2021-02-19 18:46:20,193 INFO L226 Difference]: Without dead ends: 6070 [2021-02-19 18:46:20,194 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 14 SyntacticMatches, 4 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1592 ImplicationChecksByTransitivity, 14.5s TimeCoverageRelationStatistics Valid=582, Invalid=4673, Unknown=1, NotChecked=0, Total=5256 [2021-02-19 18:46:20,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6070 states. [2021-02-19 18:46:20,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6070 to 4827. [2021-02-19 18:46:20,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4827 states, 4826 states have (on average 2.544135930377124) internal successors, (12278), 4826 states have internal predecessors, (12278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:46:20,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4827 states to 4827 states and 12278 transitions. [2021-02-19 18:46:20,249 INFO L78 Accepts]: Start accepts. Automaton has 4827 states and 12278 transitions. Word has length 30 [2021-02-19 18:46:20,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:46:20,249 INFO L480 AbstractCegarLoop]: Abstraction has 4827 states and 12278 transitions. [2021-02-19 18:46:20,249 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.8928571428571428) 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) [2021-02-19 18:46:20,249 INFO L276 IsEmpty]: Start isEmpty. Operand 4827 states and 12278 transitions. [2021-02-19 18:46:20,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-02-19 18:46:20,253 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:46:20,253 INFO L506 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:46:20,453 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable581,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:46:20,453 INFO L428 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:46:20,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:46:20,454 INFO L82 PathProgramCache]: Analyzing trace with hash -800403469, now seen corresponding path program 85 times [2021-02-19 18:46:20,454 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:46:20,454 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621464809] [2021-02-19 18:46:20,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:46:20,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:46:21,281 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:46:21,282 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621464809] [2021-02-19 18:46:21,282 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [458851133] [2021-02-19 18:46:21,282 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 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 [2021-02-19 18:46:21,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:46:21,303 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2021-02-19 18:46:21,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:46:22,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:46:22,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:46:22,326 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:46:22,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:46:22,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:46:22,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:46:22,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:46:22,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:46:22,341 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:46:22,342 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:46:22,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:46:22,347 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:46:22,348 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 7 [2021-02-19 18:46:22,352 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:46:22,371 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:46:22,375 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:46:22,375 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:75, output treesize:7 [2021-02-19 18:46:22,453 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:46:22,454 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:46:22,454 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-02-19 18:46:22,454 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629950672] [2021-02-19 18:46:22,454 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-02-19 18:46:22,454 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:46:22,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-02-19 18:46:22,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2021-02-19 18:46:22,455 INFO L87 Difference]: Start difference. First operand 4827 states and 12278 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 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) [2021-02-19 18:46:22,819 WARN L202 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 23 [2021-02-19 18:46:23,443 WARN L202 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 24 [2021-02-19 18:46:24,103 WARN L202 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 31 [2021-02-19 18:46:24,699 WARN L202 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 28 [2021-02-19 18:46:24,910 WARN L202 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 24 [2021-02-19 18:46:25,462 WARN L202 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 26 [2021-02-19 18:46:25,779 WARN L202 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 32 [2021-02-19 18:46:26,770 WARN L202 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 36 [2021-02-19 18:46:27,542 WARN L202 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 38 [2021-02-19 18:46:28,483 WARN L202 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 24 [2021-02-19 18:46:28,772 WARN L202 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 21 [2021-02-19 18:46:28,965 WARN L202 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 25 [2021-02-19 18:46:29,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:46:29,237 INFO L93 Difference]: Finished difference Result 5512 states and 13785 transitions. [2021-02-19 18:46:29,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-02-19 18:46:29,240 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 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) Word has length 30 [2021-02-19 18:46:29,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:46:29,247 INFO L225 Difference]: With dead ends: 5512 [2021-02-19 18:46:29,247 INFO L226 Difference]: Without dead ends: 5452 [2021-02-19 18:46:29,247 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 19 SyntacticMatches, 4 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 920 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=456, Invalid=2736, Unknown=0, NotChecked=0, Total=3192 [2021-02-19 18:46:29,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5452 states. [2021-02-19 18:46:29,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5452 to 5013. [2021-02-19 18:46:29,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5013 states, 5012 states have (on average 2.5548683160415004) internal successors, (12805), 5012 states have internal predecessors, (12805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:46:29,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5013 states to 5013 states and 12805 transitions. [2021-02-19 18:46:29,311 INFO L78 Accepts]: Start accepts. Automaton has 5013 states and 12805 transitions. Word has length 30 [2021-02-19 18:46:29,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:46:29,312 INFO L480 AbstractCegarLoop]: Abstraction has 5013 states and 12805 transitions. [2021-02-19 18:46:29,312 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 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) [2021-02-19 18:46:29,312 INFO L276 IsEmpty]: Start isEmpty. Operand 5013 states and 12805 transitions. [2021-02-19 18:46:29,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-02-19 18:46:29,315 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:46:29,316 INFO L506 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:46:29,518 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable732 [2021-02-19 18:46:29,519 INFO L428 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:46:29,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:46:29,519 INFO L82 PathProgramCache]: Analyzing trace with hash 807689267, now seen corresponding path program 86 times [2021-02-19 18:46:29,519 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:46:29,519 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215275744] [2021-02-19 18:46:29,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:46:29,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:46:30,157 WARN L202 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 24 [2021-02-19 18:46:30,378 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:46:30,379 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215275744] [2021-02-19 18:46:30,379 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [443842764] [2021-02-19 18:46:30,379 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 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 [2021-02-19 18:46:30,398 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 18:46:30,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:46:30,398 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2021-02-19 18:46:30,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:46:31,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:46:31,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:46:31,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:46:31,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:46:31,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:46:31,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:46:31,401 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:46:31,403 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:46:31,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:46:31,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:46:31,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:46:31,415 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:46:31,416 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:46:31,418 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 7 [2021-02-19 18:46:31,422 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:46:31,443 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:46:31,447 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:46:31,447 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:75, output treesize:7 [2021-02-19 18:46:31,547 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:46:31,547 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:46:31,547 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-02-19 18:46:31,548 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518273109] [2021-02-19 18:46:31,548 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-02-19 18:46:31,548 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:46:31,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-02-19 18:46:31,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2021-02-19 18:46:31,548 INFO L87 Difference]: Start difference. First operand 5013 states and 12805 transitions. Second operand has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:46:32,270 WARN L202 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 28 [2021-02-19 18:46:32,464 WARN L202 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 23 [2021-02-19 18:46:32,805 WARN L202 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 26 [2021-02-19 18:46:33,055 WARN L202 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 27 [2021-02-19 18:46:33,384 WARN L202 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 29 [2021-02-19 18:46:34,046 WARN L202 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 29 [2021-02-19 18:46:34,254 WARN L202 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 28 [2021-02-19 18:46:34,603 WARN L202 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 30 [2021-02-19 18:46:34,943 WARN L202 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 26 [2021-02-19 18:46:35,147 WARN L202 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2021-02-19 18:46:35,681 WARN L202 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 27 [2021-02-19 18:46:35,899 WARN L202 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 33 [2021-02-19 18:46:36,990 WARN L202 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 37 [2021-02-19 18:46:37,314 WARN L202 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 40 [2021-02-19 18:46:37,774 WARN L202 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 39 [2021-02-19 18:46:38,698 WARN L202 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 29 [2021-02-19 18:46:38,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:46:38,927 INFO L93 Difference]: Finished difference Result 5679 states and 14293 transitions. [2021-02-19 18:46:38,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-02-19 18:46:38,931 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-02-19 18:46:38,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:46:38,939 INFO L225 Difference]: With dead ends: 5679 [2021-02-19 18:46:38,939 INFO L226 Difference]: Without dead ends: 5613 [2021-02-19 18:46:38,940 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 19 SyntacticMatches, 4 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 913 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=473, Invalid=2833, Unknown=0, NotChecked=0, Total=3306 [2021-02-19 18:46:38,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5613 states. [2021-02-19 18:46:38,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5613 to 5120. [2021-02-19 18:46:38,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5120 states, 5119 states have (on average 2.5514748974409063) internal successors, (13061), 5119 states have internal predecessors, (13061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:46:38,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5120 states to 5120 states and 13061 transitions. [2021-02-19 18:46:38,991 INFO L78 Accepts]: Start accepts. Automaton has 5120 states and 13061 transitions. Word has length 30 [2021-02-19 18:46:38,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:46:38,992 INFO L480 AbstractCegarLoop]: Abstraction has 5120 states and 13061 transitions. [2021-02-19 18:46:38,992 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:46:38,992 INFO L276 IsEmpty]: Start isEmpty. Operand 5120 states and 13061 transitions. [2021-02-19 18:46:38,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-02-19 18:46:38,996 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:46:38,996 INFO L506 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:46:39,196 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable733 [2021-02-19 18:46:39,197 INFO L428 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:46:39,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:46:39,197 INFO L82 PathProgramCache]: Analyzing trace with hash 601750835, now seen corresponding path program 87 times [2021-02-19 18:46:39,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:46:39,197 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134525747] [2021-02-19 18:46:39,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:46:39,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:46:39,693 WARN L202 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 28 [2021-02-19 18:46:39,843 WARN L202 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 27 [2021-02-19 18:46:39,997 WARN L202 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 24 [2021-02-19 18:46:40,223 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 18:46:40,223 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134525747] [2021-02-19 18:46:40,223 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [424693252] [2021-02-19 18:46:40,223 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 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 [2021-02-19 18:46:40,243 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-02-19 18:46:40,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:46:40,244 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 39 conjunts are in the unsatisfiable core [2021-02-19 18:46:40,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:46:41,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:46:42,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:46:42,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:46:42,028 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:46:42,049 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:46:42,289 WARN L202 SmtUtils]: Spent 238.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2021-02-19 18:46:42,290 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:46:42,290 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 3 disjoint index pairs (out of 28 index pairs), introduced 6 new quantified variables, introduced 20 case distinctions, treesize of input 69 treesize of output 137 [2021-02-19 18:46:42,721 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-02-19 18:46:43,203 WARN L202 SmtUtils]: Spent 481.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 26 [2021-02-19 18:46:43,204 INFO L628 ElimStorePlain]: treesize reduction 544, result has 6.5 percent of original size [2021-02-19 18:46:43,218 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:46:43,218 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:94, output treesize:50 [2021-02-19 18:46:43,487 WARN L202 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 21 [2021-02-19 18:46:43,730 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:46:43,730 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:46:43,730 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17] total 27 [2021-02-19 18:46:43,730 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959659941] [2021-02-19 18:46:43,730 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-02-19 18:46:43,731 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:46:43,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-02-19 18:46:43,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=666, Unknown=0, NotChecked=0, Total=756 [2021-02-19 18:46:43,731 INFO L87 Difference]: Start difference. First operand 5120 states and 13061 transitions. Second operand has 28 states, 28 states have (on average 1.8928571428571428) 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) [2021-02-19 18:46:44,095 WARN L202 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 16 [2021-02-19 18:46:45,093 WARN L202 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 23 [2021-02-19 18:46:45,379 WARN L202 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 16 [2021-02-19 18:46:45,686 WARN L202 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 27 [2021-02-19 18:46:46,308 WARN L202 SmtUtils]: Spent 395.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 33 [2021-02-19 18:46:46,667 WARN L202 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 38 [2021-02-19 18:46:47,065 WARN L202 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 23 [2021-02-19 18:46:47,761 WARN L202 SmtUtils]: Spent 316.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 33 [2021-02-19 18:46:48,435 WARN L202 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 37 [2021-02-19 18:46:48,713 WARN L202 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 30 [2021-02-19 18:46:49,015 WARN L202 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 17 [2021-02-19 18:46:49,446 WARN L202 SmtUtils]: Spent 366.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 36 [2021-02-19 18:46:49,789 WARN L202 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 26 [2021-02-19 18:46:50,031 WARN L202 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 27 [2021-02-19 18:46:50,478 WARN L202 SmtUtils]: Spent 355.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 38 [2021-02-19 18:46:51,205 WARN L202 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 44 [2021-02-19 18:46:51,884 WARN L202 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 31 [2021-02-19 18:46:52,247 WARN L202 SmtUtils]: Spent 307.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 36 [2021-02-19 18:46:52,895 WARN L202 SmtUtils]: Spent 362.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 35 [2021-02-19 18:46:53,320 WARN L202 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 52 [2021-02-19 18:46:53,584 WARN L202 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 25 [2021-02-19 18:46:53,761 WARN L202 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 28 [2021-02-19 18:46:54,058 WARN L202 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 44 [2021-02-19 18:46:55,223 WARN L202 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 55 [2021-02-19 18:46:55,687 WARN L202 SmtUtils]: Spent 280.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 25 [2021-02-19 18:46:56,509 WARN L202 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 49 [2021-02-19 18:46:57,044 WARN L202 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 21 [2021-02-19 18:46:57,457 WARN L202 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 27 [2021-02-19 18:46:57,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:46:57,617 INFO L93 Difference]: Finished difference Result 6380 states and 15938 transitions. [2021-02-19 18:46:57,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-02-19 18:46:57,621 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8928571428571428) 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) Word has length 30 [2021-02-19 18:46:57,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:46:57,630 INFO L225 Difference]: With dead ends: 6380 [2021-02-19 18:46:57,631 INFO L226 Difference]: Without dead ends: 6332 [2021-02-19 18:46:57,631 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 14 SyntacticMatches, 4 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1361 ImplicationChecksByTransitivity, 12.3s TimeCoverageRelationStatistics Valid=664, Invalid=4028, Unknown=0, NotChecked=0, Total=4692 [2021-02-19 18:46:57,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6332 states. [2021-02-19 18:46:57,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6332 to 5236. [2021-02-19 18:46:57,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5236 states, 5235 states have (on average 2.5476599808978033) internal successors, (13337), 5235 states have internal predecessors, (13337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:46:57,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5236 states to 5236 states and 13337 transitions. [2021-02-19 18:46:57,686 INFO L78 Accepts]: Start accepts. Automaton has 5236 states and 13337 transitions. Word has length 30 [2021-02-19 18:46:57,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:46:57,686 INFO L480 AbstractCegarLoop]: Abstraction has 5236 states and 13337 transitions. [2021-02-19 18:46:57,686 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.8928571428571428) 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) [2021-02-19 18:46:57,686 INFO L276 IsEmpty]: Start isEmpty. Operand 5236 states and 13337 transitions. [2021-02-19 18:46:57,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-02-19 18:46:57,690 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:46:57,690 INFO L506 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:46:57,891 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable734,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:46:57,891 INFO L428 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:46:57,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:46:57,891 INFO L82 PathProgramCache]: Analyzing trace with hash 552061935, now seen corresponding path program 88 times [2021-02-19 18:46:57,892 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:46:57,892 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459351129] [2021-02-19 18:46:57,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:46:57,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:46:58,546 WARN L202 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 28 [2021-02-19 18:46:58,713 WARN L202 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 27 [2021-02-19 18:46:58,879 WARN L202 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 24 [2021-02-19 18:46:59,122 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:46:59,122 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459351129] [2021-02-19 18:46:59,122 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1944029380] [2021-02-19 18:46:59,122 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 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 [2021-02-19 18:46:59,140 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 18:46:59,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:46:59,141 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2021-02-19 18:46:59,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:47:00,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:47:00,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:47:00,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:47:00,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:47:00,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:47:00,201 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:47:00,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:47:00,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:47:00,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:47:00,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:47:00,215 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:47:00,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:47:00,219 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:47:00,220 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:47:00,222 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 7 [2021-02-19 18:47:00,226 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:47:00,248 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:47:00,252 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:47:00,252 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:75, output treesize:7 [2021-02-19 18:47:00,366 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:47:00,366 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:47:00,366 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 23 [2021-02-19 18:47:00,366 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659691377] [2021-02-19 18:47:00,366 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-02-19 18:47:00,367 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:47:00,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-02-19 18:47:00,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2021-02-19 18:47:00,367 INFO L87 Difference]: Start difference. First operand 5236 states and 13337 transitions. Second operand has 24 states, 24 states have (on average 2.125) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:47:01,188 WARN L202 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 28 [2021-02-19 18:47:01,904 WARN L202 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 30 [2021-02-19 18:47:02,157 WARN L202 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 25 [2021-02-19 18:47:02,665 WARN L202 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 29 [2021-02-19 18:47:03,163 WARN L202 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 30 [2021-02-19 18:47:03,585 WARN L202 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 25 [2021-02-19 18:47:03,831 WARN L202 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 30 [2021-02-19 18:47:04,221 WARN L202 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 29 [2021-02-19 18:47:04,491 WARN L202 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 26 [2021-02-19 18:47:04,796 WARN L202 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 34 [2021-02-19 18:47:05,015 WARN L202 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2021-02-19 18:47:05,383 WARN L202 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 27 [2021-02-19 18:47:05,893 WARN L202 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 32 [2021-02-19 18:47:06,191 WARN L202 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 32 [2021-02-19 18:47:06,446 WARN L202 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 28 [2021-02-19 18:47:06,684 WARN L202 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 32 [2021-02-19 18:47:07,042 WARN L202 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 37 [2021-02-19 18:47:07,355 WARN L202 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 40 [2021-02-19 18:47:08,020 WARN L202 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 21 [2021-02-19 18:47:08,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:47:08,170 INFO L93 Difference]: Finished difference Result 5603 states and 14123 transitions. [2021-02-19 18:47:08,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-02-19 18:47:08,174 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-02-19 18:47:08,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:47:08,182 INFO L225 Difference]: With dead ends: 5603 [2021-02-19 18:47:08,182 INFO L226 Difference]: Without dead ends: 5543 [2021-02-19 18:47:08,182 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 603 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=373, Invalid=2177, Unknown=0, NotChecked=0, Total=2550 [2021-02-19 18:47:08,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5543 states. [2021-02-19 18:47:08,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5543 to 5207. [2021-02-19 18:47:08,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5207 states, 5206 states have (on average 2.5399538993469073) internal successors, (13223), 5206 states have internal predecessors, (13223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:47:08,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5207 states to 5207 states and 13223 transitions. [2021-02-19 18:47:08,232 INFO L78 Accepts]: Start accepts. Automaton has 5207 states and 13223 transitions. Word has length 30 [2021-02-19 18:47:08,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:47:08,232 INFO L480 AbstractCegarLoop]: Abstraction has 5207 states and 13223 transitions. [2021-02-19 18:47:08,232 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:47:08,232 INFO L276 IsEmpty]: Start isEmpty. Operand 5207 states and 13223 transitions. [2021-02-19 18:47:08,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-02-19 18:47:08,236 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:47:08,236 INFO L506 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:47:08,436 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable827,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:47:08,437 INFO L428 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:47:08,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:47:08,437 INFO L82 PathProgramCache]: Analyzing trace with hash 263413299, now seen corresponding path program 89 times [2021-02-19 18:47:08,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:47:08,437 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807013935] [2021-02-19 18:47:08,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:47:08,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:47:08,942 WARN L202 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 30 [2021-02-19 18:47:09,211 WARN L202 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 27 [2021-02-19 18:47:09,383 WARN L202 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 24 [2021-02-19 18:47:09,666 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:47:09,666 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807013935] [2021-02-19 18:47:09,666 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [511476813] [2021-02-19 18:47:09,666 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 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 [2021-02-19 18:47:09,685 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-02-19 18:47:09,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:47:09,686 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2021-02-19 18:47:09,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:47:10,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:47:10,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:47:10,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:47:10,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:47:10,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:47:10,853 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:47:10,855 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:47:10,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:47:10,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:47:10,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:47:10,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:47:10,872 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:47:10,874 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:47:10,876 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 7 [2021-02-19 18:47:10,881 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:47:10,909 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:47:10,913 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:47:10,914 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:75, output treesize:7 [2021-02-19 18:47:11,044 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:47:11,044 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:47:11,044 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 23 [2021-02-19 18:47:11,044 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623027456] [2021-02-19 18:47:11,045 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-02-19 18:47:11,045 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:47:11,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-02-19 18:47:11,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=478, Unknown=0, NotChecked=0, Total=552 [2021-02-19 18:47:11,045 INFO L87 Difference]: Start difference. First operand 5207 states and 13223 transitions. Second operand has 24 states, 24 states have (on average 2.125) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:47:11,901 WARN L202 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 24 [2021-02-19 18:47:12,605 WARN L202 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 31 [2021-02-19 18:47:12,845 WARN L202 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 26 [2021-02-19 18:47:13,323 WARN L202 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 36 [2021-02-19 18:47:13,741 WARN L202 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 23 [2021-02-19 18:47:14,296 WARN L202 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 39 [2021-02-19 18:47:14,818 WARN L202 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 42 [2021-02-19 18:47:15,376 WARN L202 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 37 [2021-02-19 18:47:15,942 WARN L202 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 32 [2021-02-19 18:47:16,280 WARN L202 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 27 [2021-02-19 18:47:16,636 WARN L202 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 46 [2021-02-19 18:47:17,609 WARN L202 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 44 [2021-02-19 18:47:17,870 WARN L202 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 32 [2021-02-19 18:47:18,281 WARN L202 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 38 [2021-02-19 18:47:18,855 WARN L202 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 40 [2021-02-19 18:47:19,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:47:19,393 INFO L93 Difference]: Finished difference Result 5675 states and 14287 transitions. [2021-02-19 18:47:19,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-02-19 18:47:19,396 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-02-19 18:47:19,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:47:19,403 INFO L225 Difference]: With dead ends: 5675 [2021-02-19 18:47:19,403 INFO L226 Difference]: Without dead ends: 5655 [2021-02-19 18:47:19,403 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 768 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=461, Invalid=2619, Unknown=0, NotChecked=0, Total=3080 [2021-02-19 18:47:19,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5655 states. [2021-02-19 18:47:19,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5655 to 5285. [2021-02-19 18:47:19,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5285 states, 5284 states have (on average 2.542013626040878) internal successors, (13432), 5284 states have internal predecessors, (13432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:47:19,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5285 states to 5285 states and 13432 transitions. [2021-02-19 18:47:19,451 INFO L78 Accepts]: Start accepts. Automaton has 5285 states and 13432 transitions. Word has length 30 [2021-02-19 18:47:19,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:47:19,451 INFO L480 AbstractCegarLoop]: Abstraction has 5285 states and 13432 transitions. [2021-02-19 18:47:19,451 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:47:19,451 INFO L276 IsEmpty]: Start isEmpty. Operand 5285 states and 13432 transitions. [2021-02-19 18:47:19,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-02-19 18:47:19,455 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:47:19,455 INFO L506 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:47:19,656 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable828,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:47:19,656 INFO L428 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:47:19,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:47:19,656 INFO L82 PathProgramCache]: Analyzing trace with hash -213877433, now seen corresponding path program 90 times [2021-02-19 18:47:19,656 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:47:19,656 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354366443] [2021-02-19 18:47:19,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:47:19,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:47:20,051 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:47:20,051 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354366443] [2021-02-19 18:47:20,052 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [730846578] [2021-02-19 18:47:20,052 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 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 [2021-02-19 18:47:20,075 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-02-19 18:47:20,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:47:20,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 13 conjunts are in the unsatisfiable core [2021-02-19 18:47:20,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:47:21,089 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:47:21,089 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:47:21,089 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-02-19 18:47:21,090 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114915768] [2021-02-19 18:47:21,090 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-02-19 18:47:21,090 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:47:21,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-02-19 18:47:21,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=491, Unknown=0, NotChecked=0, Total=600 [2021-02-19 18:47:21,090 INFO L87 Difference]: Start difference. First operand 5285 states and 13432 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:47:25,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:47:25,521 INFO L93 Difference]: Finished difference Result 6329 states and 15636 transitions. [2021-02-19 18:47:25,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-02-19 18:47:25,523 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-02-19 18:47:25,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:47:25,530 INFO L225 Difference]: With dead ends: 6329 [2021-02-19 18:47:25,531 INFO L226 Difference]: Without dead ends: 6329 [2021-02-19 18:47:25,531 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1122 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=1225, Invalid=3467, Unknown=0, NotChecked=0, Total=4692 [2021-02-19 18:47:25,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6329 states. [2021-02-19 18:47:25,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6329 to 5060. [2021-02-19 18:47:25,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5060 states, 5059 states have (on average 2.5408183435461553) internal successors, (12854), 5059 states have internal predecessors, (12854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:47:25,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5060 states to 5060 states and 12854 transitions. [2021-02-19 18:47:25,580 INFO L78 Accepts]: Start accepts. Automaton has 5060 states and 12854 transitions. Word has length 32 [2021-02-19 18:47:25,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:47:25,581 INFO L480 AbstractCegarLoop]: Abstraction has 5060 states and 12854 transitions. [2021-02-19 18:47:25,581 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:47:25,581 INFO L276 IsEmpty]: Start isEmpty. Operand 5060 states and 12854 transitions. [2021-02-19 18:47:25,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-02-19 18:47:25,584 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:47:25,584 INFO L506 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:47:25,785 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable829 [2021-02-19 18:47:25,785 INFO L428 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:47:25,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:47:25,785 INFO L82 PathProgramCache]: Analyzing trace with hash 2090945895, now seen corresponding path program 91 times [2021-02-19 18:47:25,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:47:25,785 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553298352] [2021-02-19 18:47:25,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:47:25,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:47:26,123 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:47:26,123 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553298352] [2021-02-19 18:47:26,123 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1528475288] [2021-02-19 18:47:26,123 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 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 [2021-02-19 18:47:26,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:47:26,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 13 conjunts are in the unsatisfiable core [2021-02-19 18:47:26,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:47:27,046 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:47:27,047 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:47:27,047 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-02-19 18:47:27,047 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693296262] [2021-02-19 18:47:27,047 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-02-19 18:47:27,047 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:47:27,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-02-19 18:47:27,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=492, Unknown=0, NotChecked=0, Total=600 [2021-02-19 18:47:27,048 INFO L87 Difference]: Start difference. First operand 5060 states and 12854 transitions. Second operand has 25 states, 25 states have (on average 2.2) internal successors, (55), 24 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:47:33,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:47:33,122 INFO L93 Difference]: Finished difference Result 8392 states and 20458 transitions. [2021-02-19 18:47:33,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-02-19 18:47:33,126 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 24 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-02-19 18:47:33,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:47:33,135 INFO L225 Difference]: With dead ends: 8392 [2021-02-19 18:47:33,135 INFO L226 Difference]: Without dead ends: 8288 [2021-02-19 18:47:33,136 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2357 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=1727, Invalid=5929, Unknown=0, NotChecked=0, Total=7656 [2021-02-19 18:47:33,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8288 states. [2021-02-19 18:47:33,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8288 to 5534. [2021-02-19 18:47:33,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5534 states, 5533 states have (on average 2.5555756370865716) internal successors, (14140), 5533 states have internal predecessors, (14140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:47:33,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5534 states to 5534 states and 14140 transitions. [2021-02-19 18:47:33,205 INFO L78 Accepts]: Start accepts. Automaton has 5534 states and 14140 transitions. Word has length 32 [2021-02-19 18:47:33,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:47:33,205 INFO L480 AbstractCegarLoop]: Abstraction has 5534 states and 14140 transitions. [2021-02-19 18:47:33,205 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 24 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:47:33,205 INFO L276 IsEmpty]: Start isEmpty. Operand 5534 states and 14140 transitions. [2021-02-19 18:47:33,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-02-19 18:47:33,209 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:47:33,209 INFO L506 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:47:33,409 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable830,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:47:33,410 INFO L428 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:47:33,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:47:33,410 INFO L82 PathProgramCache]: Analyzing trace with hash 1767002919, now seen corresponding path program 92 times [2021-02-19 18:47:33,410 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:47:33,410 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986578953] [2021-02-19 18:47:33,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:47:33,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:47:33,651 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:47:33,652 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986578953] [2021-02-19 18:47:33,652 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [483901011] [2021-02-19 18:47:33,652 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 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 [2021-02-19 18:47:33,669 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 18:47:33,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:47:33,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 13 conjunts are in the unsatisfiable core [2021-02-19 18:47:33,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:47:34,476 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:47:34,476 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:47:34,476 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13] total 20 [2021-02-19 18:47:34,476 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731067435] [2021-02-19 18:47:34,476 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-02-19 18:47:34,477 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:47:34,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-02-19 18:47:34,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2021-02-19 18:47:34,477 INFO L87 Difference]: Start difference. First operand 5534 states and 14140 transitions. Second operand has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 20 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:47:39,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:47:39,244 INFO L93 Difference]: Finished difference Result 9933 states and 24855 transitions. [2021-02-19 18:47:39,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-02-19 18:47:39,247 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 20 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-02-19 18:47:39,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:47:39,259 INFO L225 Difference]: With dead ends: 9933 [2021-02-19 18:47:39,259 INFO L226 Difference]: Without dead ends: 9929 [2021-02-19 18:47:39,260 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1897 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=1604, Invalid=4248, Unknown=0, NotChecked=0, Total=5852 [2021-02-19 18:47:39,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9929 states. [2021-02-19 18:47:39,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9929 to 7205. [2021-02-19 18:47:39,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7205 states, 7204 states have (on average 2.56635202665186) internal successors, (18488), 7204 states have internal predecessors, (18488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:47:39,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7205 states to 7205 states and 18488 transitions. [2021-02-19 18:47:39,348 INFO L78 Accepts]: Start accepts. Automaton has 7205 states and 18488 transitions. Word has length 32 [2021-02-19 18:47:39,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:47:39,348 INFO L480 AbstractCegarLoop]: Abstraction has 7205 states and 18488 transitions. [2021-02-19 18:47:39,348 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 20 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:47:39,348 INFO L276 IsEmpty]: Start isEmpty. Operand 7205 states and 18488 transitions. [2021-02-19 18:47:39,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-02-19 18:47:39,353 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:47:39,353 INFO L506 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:47:39,553 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable831 [2021-02-19 18:47:39,554 INFO L428 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:47:39,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:47:39,554 INFO L82 PathProgramCache]: Analyzing trace with hash 1435324131, now seen corresponding path program 93 times [2021-02-19 18:47:39,554 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:47:39,554 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042119386] [2021-02-19 18:47:39,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:47:39,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:47:39,772 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 21 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:47:39,773 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042119386] [2021-02-19 18:47:39,773 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1663488689] [2021-02-19 18:47:39,773 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 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 [2021-02-19 18:47:39,800 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-02-19 18:47:39,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:47:39,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 13 conjunts are in the unsatisfiable core [2021-02-19 18:47:39,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:47:40,731 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 21 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:47:40,731 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:47:40,731 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13] total 20 [2021-02-19 18:47:40,731 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888534969] [2021-02-19 18:47:40,731 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-02-19 18:47:40,731 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:47:40,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-02-19 18:47:40,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=319, Unknown=0, NotChecked=0, Total=420 [2021-02-19 18:47:40,732 INFO L87 Difference]: Start difference. First operand 7205 states and 18488 transitions. Second operand has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 20 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:47:44,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:47:44,698 INFO L93 Difference]: Finished difference Result 7652 states and 19346 transitions. [2021-02-19 18:47:44,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-02-19 18:47:44,705 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 20 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-02-19 18:47:44,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:47:44,713 INFO L225 Difference]: With dead ends: 7652 [2021-02-19 18:47:44,713 INFO L226 Difference]: Without dead ends: 7648 [2021-02-19 18:47:44,714 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1296 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=1088, Invalid=3334, Unknown=0, NotChecked=0, Total=4422 [2021-02-19 18:47:44,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7648 states. [2021-02-19 18:47:44,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7648 to 7144. [2021-02-19 18:47:44,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7144 states, 7143 states have (on average 2.5671286574268515) internal successors, (18337), 7143 states have internal predecessors, (18337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:47:44,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7144 states to 7144 states and 18337 transitions. [2021-02-19 18:47:44,786 INFO L78 Accepts]: Start accepts. Automaton has 7144 states and 18337 transitions. Word has length 32 [2021-02-19 18:47:44,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:47:44,786 INFO L480 AbstractCegarLoop]: Abstraction has 7144 states and 18337 transitions. [2021-02-19 18:47:44,786 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 20 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:47:44,786 INFO L276 IsEmpty]: Start isEmpty. Operand 7144 states and 18337 transitions. [2021-02-19 18:47:44,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-02-19 18:47:44,791 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:47:44,791 INFO L506 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:47:44,991 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable832,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:47:44,991 INFO L428 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:47:44,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:47:44,992 INFO L82 PathProgramCache]: Analyzing trace with hash 1001053481, now seen corresponding path program 94 times [2021-02-19 18:47:44,992 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:47:44,992 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971531727] [2021-02-19 18:47:44,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:47:44,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:47:45,199 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 27 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 18:47:45,200 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971531727] [2021-02-19 18:47:45,200 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1000748996] [2021-02-19 18:47:45,200 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 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:47:45,217 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 18:47:45,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:47:45,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 13 conjunts are in the unsatisfiable core [2021-02-19 18:47:45,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:47:45,979 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 21 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:47:45,980 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:47:45,980 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13] total 20 [2021-02-19 18:47:45,980 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417495561] [2021-02-19 18:47:45,980 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-02-19 18:47:45,980 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:47:45,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-02-19 18:47:45,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2021-02-19 18:47:45,980 INFO L87 Difference]: Start difference. First operand 7144 states and 18337 transitions. Second operand has 21 states, 21 states have (on average 2.619047619047619) internal successors, (55), 20 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:47:49,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:47:49,073 INFO L93 Difference]: Finished difference Result 9307 states and 23492 transitions. [2021-02-19 18:47:49,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-02-19 18:47:49,076 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.619047619047619) internal successors, (55), 20 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-02-19 18:47:49,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:47:49,088 INFO L225 Difference]: With dead ends: 9307 [2021-02-19 18:47:49,088 INFO L226 Difference]: Without dead ends: 9295 [2021-02-19 18:47:49,088 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 813 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=721, Invalid=2249, Unknown=0, NotChecked=0, Total=2970 [2021-02-19 18:47:49,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9295 states. [2021-02-19 18:47:49,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9295 to 7390. [2021-02-19 18:47:49,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7390 states, 7389 states have (on average 2.5772093652727026) internal successors, (19043), 7389 states have internal predecessors, (19043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:47:49,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7390 states to 7390 states and 19043 transitions. [2021-02-19 18:47:49,193 INFO L78 Accepts]: Start accepts. Automaton has 7390 states and 19043 transitions. Word has length 32 [2021-02-19 18:47:49,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:47:49,193 INFO L480 AbstractCegarLoop]: Abstraction has 7390 states and 19043 transitions. [2021-02-19 18:47:49,193 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.619047619047619) internal successors, (55), 20 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:47:49,193 INFO L276 IsEmpty]: Start isEmpty. Operand 7390 states and 19043 transitions. [2021-02-19 18:47:49,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-02-19 18:47:49,197 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:47:49,198 INFO L506 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:47:49,399 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable833 [2021-02-19 18:47:49,400 INFO L428 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:47:49,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:47:49,400 INFO L82 PathProgramCache]: Analyzing trace with hash 1445586503, now seen corresponding path program 95 times [2021-02-19 18:47:49,400 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:47:49,400 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774554870] [2021-02-19 18:47:49,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:47:49,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:47:49,635 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 18 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:47:49,636 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774554870] [2021-02-19 18:47:49,636 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [352089312] [2021-02-19 18:47:49,636 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 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 [2021-02-19 18:47:49,655 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-02-19 18:47:49,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:47:49,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 13 conjunts are in the unsatisfiable core [2021-02-19 18:47:49,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:47:50,512 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 18 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:47:50,512 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:47:50,512 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 21 [2021-02-19 18:47:50,512 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259387980] [2021-02-19 18:47:50,512 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-02-19 18:47:50,512 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:47:50,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-02-19 18:47:50,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=363, Unknown=0, NotChecked=0, Total=462 [2021-02-19 18:47:50,513 INFO L87 Difference]: Start difference. First operand 7390 states and 19043 transitions. Second operand has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 21 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:47:54,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:47:54,839 INFO L93 Difference]: Finished difference Result 8545 states and 21523 transitions. [2021-02-19 18:47:54,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-02-19 18:47:54,842 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 21 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-02-19 18:47:54,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:47:54,852 INFO L225 Difference]: With dead ends: 8545 [2021-02-19 18:47:54,852 INFO L226 Difference]: Without dead ends: 8533 [2021-02-19 18:47:54,853 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1441 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=1130, Invalid=3562, Unknown=0, NotChecked=0, Total=4692 [2021-02-19 18:47:54,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8533 states. [2021-02-19 18:47:54,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8533 to 7582. [2021-02-19 18:47:54,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7582 states, 7581 states have (on average 2.584619443345205) internal successors, (19594), 7581 states have internal predecessors, (19594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:47:54,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7582 states to 7582 states and 19594 transitions. [2021-02-19 18:47:54,930 INFO L78 Accepts]: Start accepts. Automaton has 7582 states and 19594 transitions. Word has length 32 [2021-02-19 18:47:54,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:47:54,930 INFO L480 AbstractCegarLoop]: Abstraction has 7582 states and 19594 transitions. [2021-02-19 18:47:54,930 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 21 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:47:54,930 INFO L276 IsEmpty]: Start isEmpty. Operand 7582 states and 19594 transitions. [2021-02-19 18:47:54,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-02-19 18:47:54,935 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:47:54,935 INFO L506 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:47:55,135 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable834 [2021-02-19 18:47:55,135 INFO L428 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:47:55,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:47:55,136 INFO L82 PathProgramCache]: Analyzing trace with hash -1537405113, now seen corresponding path program 96 times [2021-02-19 18:47:55,136 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:47:55,136 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541208611] [2021-02-19 18:47:55,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:47:55,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:47:55,426 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 15 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:47:55,427 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541208611] [2021-02-19 18:47:55,427 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [901076877] [2021-02-19 18:47:55,427 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 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 [2021-02-19 18:47:55,446 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-02-19 18:47:55,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:47:55,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 13 conjunts are in the unsatisfiable core [2021-02-19 18:47:55,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:47:56,320 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 15 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:47:56,320 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:47:56,320 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-02-19 18:47:56,320 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924802457] [2021-02-19 18:47:56,320 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-02-19 18:47:56,320 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:47:56,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-02-19 18:47:56,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=405, Unknown=0, NotChecked=0, Total=506 [2021-02-19 18:47:56,321 INFO L87 Difference]: Start difference. First operand 7582 states and 19594 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:48:00,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:48:00,387 INFO L93 Difference]: Finished difference Result 9120 states and 22905 transitions. [2021-02-19 18:48:00,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-02-19 18:48:00,390 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-02-19 18:48:00,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:48:00,402 INFO L225 Difference]: With dead ends: 9120 [2021-02-19 18:48:00,402 INFO L226 Difference]: Without dead ends: 9094 [2021-02-19 18:48:00,402 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1598 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=1183, Invalid=3787, Unknown=0, NotChecked=0, Total=4970 [2021-02-19 18:48:00,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9094 states. [2021-02-19 18:48:00,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9094 to 7675. [2021-02-19 18:48:00,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7675 states, 7674 states have (on average 2.5901746155850924) internal successors, (19877), 7674 states have internal predecessors, (19877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:48:00,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7675 states to 7675 states and 19877 transitions. [2021-02-19 18:48:00,488 INFO L78 Accepts]: Start accepts. Automaton has 7675 states and 19877 transitions. Word has length 32 [2021-02-19 18:48:00,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:48:00,488 INFO L480 AbstractCegarLoop]: Abstraction has 7675 states and 19877 transitions. [2021-02-19 18:48:00,488 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:48:00,488 INFO L276 IsEmpty]: Start isEmpty. Operand 7675 states and 19877 transitions. [2021-02-19 18:48:00,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-02-19 18:48:00,493 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:48:00,493 INFO L506 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:48:00,694 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable835,98 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:48:00,694 INFO L428 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:48:00,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:48:00,694 INFO L82 PathProgramCache]: Analyzing trace with hash 845805639, now seen corresponding path program 97 times [2021-02-19 18:48:00,695 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:48:00,695 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053836913] [2021-02-19 18:48:00,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:48:00,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:48:01,014 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:48:01,014 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053836913] [2021-02-19 18:48:01,014 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1511675279] [2021-02-19 18:48:01,014 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 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 [2021-02-19 18:48:01,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:48:01,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 13 conjunts are in the unsatisfiable core [2021-02-19 18:48:01,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:48:02,059 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:48:02,059 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:48:02,059 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-02-19 18:48:02,059 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010568187] [2021-02-19 18:48:02,060 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-02-19 18:48:02,060 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:48:02,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-02-19 18:48:02,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=445, Unknown=0, NotChecked=0, Total=552 [2021-02-19 18:48:02,060 INFO L87 Difference]: Start difference. First operand 7675 states and 19877 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:48:06,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:48:06,246 INFO L93 Difference]: Finished difference Result 9477 states and 23788 transitions. [2021-02-19 18:48:06,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-02-19 18:48:06,250 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-02-19 18:48:06,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:48:06,261 INFO L225 Difference]: With dead ends: 9477 [2021-02-19 18:48:06,261 INFO L226 Difference]: Without dead ends: 9447 [2021-02-19 18:48:06,262 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1707 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=1246, Invalid=4010, Unknown=0, NotChecked=0, Total=5256 [2021-02-19 18:48:06,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9447 states. [2021-02-19 18:48:06,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9447 to 7039. [2021-02-19 18:48:06,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7039 states, 7038 states have (on average 2.5869565217391304) internal successors, (18207), 7038 states have internal predecessors, (18207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:48:06,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7039 states to 7039 states and 18207 transitions. [2021-02-19 18:48:06,351 INFO L78 Accepts]: Start accepts. Automaton has 7039 states and 18207 transitions. Word has length 32 [2021-02-19 18:48:06,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:48:06,351 INFO L480 AbstractCegarLoop]: Abstraction has 7039 states and 18207 transitions. [2021-02-19 18:48:06,351 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:48:06,351 INFO L276 IsEmpty]: Start isEmpty. Operand 7039 states and 18207 transitions. [2021-02-19 18:48:06,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-02-19 18:48:06,357 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:48:06,357 INFO L506 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:48:06,578 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable836,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:48:06,578 INFO L428 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:48:06,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:48:06,579 INFO L82 PathProgramCache]: Analyzing trace with hash -668161159, now seen corresponding path program 98 times [2021-02-19 18:48:06,579 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:48:06,579 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000217581] [2021-02-19 18:48:06,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:48:06,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:48:06,986 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 15 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 18:48:06,986 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000217581] [2021-02-19 18:48:06,986 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1765851205] [2021-02-19 18:48:06,986 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 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 [2021-02-19 18:48:07,004 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 18:48:07,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:48:07,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 13 conjunts are in the unsatisfiable core [2021-02-19 18:48:07,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:48:07,964 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 12 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:48:07,964 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:48:07,964 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-02-19 18:48:07,964 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645813087] [2021-02-19 18:48:07,964 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-02-19 18:48:07,965 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:48:07,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-02-19 18:48:07,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=491, Unknown=0, NotChecked=0, Total=600 [2021-02-19 18:48:07,965 INFO L87 Difference]: Start difference. First operand 7039 states and 18207 transitions. Second operand has 25 states, 25 states have (on average 2.24) internal successors, (56), 24 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) [2021-02-19 18:48:12,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:48:12,601 INFO L93 Difference]: Finished difference Result 8636 states and 21453 transitions. [2021-02-19 18:48:12,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-02-19 18:48:12,604 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.24) internal successors, (56), 24 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) Word has length 32 [2021-02-19 18:48:12,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:48:12,614 INFO L225 Difference]: With dead ends: 8636 [2021-02-19 18:48:12,615 INFO L226 Difference]: Without dead ends: 8636 [2021-02-19 18:48:12,615 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1328 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=1281, Invalid=3689, Unknown=0, NotChecked=0, Total=4970 [2021-02-19 18:48:12,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8636 states. [2021-02-19 18:48:12,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8636 to 6391. [2021-02-19 18:48:12,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6391 states, 6390 states have (on average 2.5741784037558686) internal successors, (16449), 6390 states have internal predecessors, (16449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:48:12,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6391 states to 6391 states and 16449 transitions. [2021-02-19 18:48:12,723 INFO L78 Accepts]: Start accepts. Automaton has 6391 states and 16449 transitions. Word has length 32 [2021-02-19 18:48:12,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:48:12,724 INFO L480 AbstractCegarLoop]: Abstraction has 6391 states and 16449 transitions. [2021-02-19 18:48:12,724 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.24) internal successors, (56), 24 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) [2021-02-19 18:48:12,724 INFO L276 IsEmpty]: Start isEmpty. Operand 6391 states and 16449 transitions. [2021-02-19 18:48:12,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-02-19 18:48:12,729 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:48:12,729 INFO L506 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:48:12,929 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable837 [2021-02-19 18:48:12,929 INFO L428 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:48:12,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:48:12,930 INFO L82 PathProgramCache]: Analyzing trace with hash 1460058497, now seen corresponding path program 99 times [2021-02-19 18:48:12,930 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:48:12,930 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124042250] [2021-02-19 18:48:12,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:48:12,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:48:13,261 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 18 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 18:48:13,261 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124042250] [2021-02-19 18:48:13,262 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [858061461] [2021-02-19 18:48:13,262 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 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 [2021-02-19 18:48:13,281 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-02-19 18:48:13,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:48:13,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 13 conjunts are in the unsatisfiable core [2021-02-19 18:48:13,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:48:14,203 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 18 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:48:14,203 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:48:14,204 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-02-19 18:48:14,204 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343264615] [2021-02-19 18:48:14,204 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-02-19 18:48:14,204 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:48:14,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-02-19 18:48:14,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=453, Unknown=0, NotChecked=0, Total=552 [2021-02-19 18:48:14,204 INFO L87 Difference]: Start difference. First operand 6391 states and 16449 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:48:18,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:48:18,638 INFO L93 Difference]: Finished difference Result 7616 states and 18893 transitions. [2021-02-19 18:48:18,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-02-19 18:48:18,642 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-02-19 18:48:18,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:48:18,650 INFO L225 Difference]: With dead ends: 7616 [2021-02-19 18:48:18,650 INFO L226 Difference]: Without dead ends: 7550 [2021-02-19 18:48:18,650 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1720 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=1147, Invalid=4109, Unknown=0, NotChecked=0, Total=5256 [2021-02-19 18:48:18,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7550 states. [2021-02-19 18:48:18,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7550 to 6385. [2021-02-19 18:48:18,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6385 states, 6384 states have (on average 2.5731516290726817) internal successors, (16427), 6384 states have internal predecessors, (16427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:48:18,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6385 states to 6385 states and 16427 transitions. [2021-02-19 18:48:18,718 INFO L78 Accepts]: Start accepts. Automaton has 6385 states and 16427 transitions. Word has length 32 [2021-02-19 18:48:18,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:48:18,718 INFO L480 AbstractCegarLoop]: Abstraction has 6385 states and 16427 transitions. [2021-02-19 18:48:18,718 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:48:18,718 INFO L276 IsEmpty]: Start isEmpty. Operand 6385 states and 16427 transitions. [2021-02-19 18:48:18,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-02-19 18:48:18,722 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:48:18,722 INFO L506 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:48:18,922 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable838,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:48:18,923 INFO L428 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:48:18,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:48:18,923 INFO L82 PathProgramCache]: Analyzing trace with hash -1798787207, now seen corresponding path program 100 times [2021-02-19 18:48:18,923 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:48:18,923 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895430364] [2021-02-19 18:48:18,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:48:18,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:48:19,225 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 14 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 18:48:19,226 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895430364] [2021-02-19 18:48:19,226 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1175977653] [2021-02-19 18:48:19,226 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 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 [2021-02-19 18:48:19,243 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 18:48:19,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:48:19,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 13 conjunts are in the unsatisfiable core [2021-02-19 18:48:19,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:48:20,062 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 12 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:48:20,063 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:48:20,063 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-02-19 18:48:20,063 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717961624] [2021-02-19 18:48:20,063 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-02-19 18:48:20,063 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:48:20,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-02-19 18:48:20,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=453, Unknown=0, NotChecked=0, Total=552 [2021-02-19 18:48:20,063 INFO L87 Difference]: Start difference. First operand 6385 states and 16427 transitions. Second operand has 24 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 23 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) [2021-02-19 18:48:24,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:48:24,614 INFO L93 Difference]: Finished difference Result 8396 states and 20751 transitions. [2021-02-19 18:48:24,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-02-19 18:48:24,616 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 23 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) Word has length 32 [2021-02-19 18:48:24,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:48:24,625 INFO L225 Difference]: With dead ends: 8396 [2021-02-19 18:48:24,625 INFO L226 Difference]: Without dead ends: 8396 [2021-02-19 18:48:24,626 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1697 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=1485, Invalid=4065, Unknown=0, NotChecked=0, Total=5550 [2021-02-19 18:48:24,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8396 states. [2021-02-19 18:48:24,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8396 to 5791. [2021-02-19 18:48:24,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5791 states, 5790 states have (on average 2.550259067357513) internal successors, (14766), 5790 states have internal predecessors, (14766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:48:24,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5791 states to 5791 states and 14766 transitions. [2021-02-19 18:48:24,685 INFO L78 Accepts]: Start accepts. Automaton has 5791 states and 14766 transitions. Word has length 32 [2021-02-19 18:48:24,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:48:24,685 INFO L480 AbstractCegarLoop]: Abstraction has 5791 states and 14766 transitions. [2021-02-19 18:48:24,685 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 23 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) [2021-02-19 18:48:24,685 INFO L276 IsEmpty]: Start isEmpty. Operand 5791 states and 14766 transitions. [2021-02-19 18:48:24,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-02-19 18:48:24,689 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:48:24,689 INFO L506 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:48:24,890 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable839,102 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:48:24,890 INFO L428 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:48:24,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:48:24,890 INFO L82 PathProgramCache]: Analyzing trace with hash 1711051581, now seen corresponding path program 101 times [2021-02-19 18:48:24,890 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:48:24,890 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059311525] [2021-02-19 18:48:24,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:48:24,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:48:25,154 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 16 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 18:48:25,154 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059311525] [2021-02-19 18:48:25,154 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1034712212] [2021-02-19 18:48:25,154 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 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:48:25,172 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-02-19 18:48:25,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:48:25,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 13 conjunts are in the unsatisfiable core [2021-02-19 18:48:25,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:48:25,992 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 15 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:48:25,992 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:48:25,992 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-02-19 18:48:25,992 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223473151] [2021-02-19 18:48:25,993 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-02-19 18:48:25,993 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:48:25,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-02-19 18:48:25,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=412, Unknown=0, NotChecked=0, Total=506 [2021-02-19 18:48:25,993 INFO L87 Difference]: Start difference. First operand 5791 states and 14766 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:48:29,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:48:29,865 INFO L93 Difference]: Finished difference Result 6671 states and 16517 transitions. [2021-02-19 18:48:29,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-02-19 18:48:29,868 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-02-19 18:48:29,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:48:29,876 INFO L225 Difference]: With dead ends: 6671 [2021-02-19 18:48:29,876 INFO L226 Difference]: Without dead ends: 6632 [2021-02-19 18:48:29,876 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1474 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=968, Invalid=3454, Unknown=0, NotChecked=0, Total=4422 [2021-02-19 18:48:29,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6632 states. [2021-02-19 18:48:29,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6632 to 5780. [2021-02-19 18:48:29,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5780 states, 5779 states have (on average 2.5478456480359926) internal successors, (14724), 5779 states have internal predecessors, (14724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:48:29,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5780 states to 5780 states and 14724 transitions. [2021-02-19 18:48:29,949 INFO L78 Accepts]: Start accepts. Automaton has 5780 states and 14724 transitions. Word has length 32 [2021-02-19 18:48:29,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:48:29,949 INFO L480 AbstractCegarLoop]: Abstraction has 5780 states and 14724 transitions. [2021-02-19 18:48:29,949 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:48:29,949 INFO L276 IsEmpty]: Start isEmpty. Operand 5780 states and 14724 transitions. [2021-02-19 18:48:29,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-02-19 18:48:29,953 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:48:29,953 INFO L506 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:48:30,153 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable840 [2021-02-19 18:48:30,153 INFO L428 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:48:30,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:48:30,154 INFO L82 PathProgramCache]: Analyzing trace with hash 278246265, now seen corresponding path program 102 times [2021-02-19 18:48:30,154 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:48:30,154 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284453033] [2021-02-19 18:48:30,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:48:30,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:48:30,416 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 13 proven. 27 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 18:48:30,416 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284453033] [2021-02-19 18:48:30,416 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1997191030] [2021-02-19 18:48:30,416 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 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 [2021-02-19 18:48:30,434 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-02-19 18:48:30,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:48:30,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 13 conjunts are in the unsatisfiable core [2021-02-19 18:48:30,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:48:31,275 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 12 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:48:31,276 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:48:31,276 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-02-19 18:48:31,276 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968088827] [2021-02-19 18:48:31,276 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-02-19 18:48:31,276 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:48:31,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-02-19 18:48:31,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2021-02-19 18:48:31,277 INFO L87 Difference]: Start difference. First operand 5780 states and 14724 transitions. Second operand has 23 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 22 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) [2021-02-19 18:48:36,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:48:36,242 INFO L93 Difference]: Finished difference Result 8415 states and 20738 transitions. [2021-02-19 18:48:36,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-02-19 18:48:36,245 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 22 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) Word has length 32 [2021-02-19 18:48:36,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:48:36,253 INFO L225 Difference]: With dead ends: 8415 [2021-02-19 18:48:36,254 INFO L226 Difference]: Without dead ends: 8415 [2021-02-19 18:48:36,254 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2166 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=1768, Invalid=4552, Unknown=0, NotChecked=0, Total=6320 [2021-02-19 18:48:36,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8415 states. [2021-02-19 18:48:36,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8415 to 6427. [2021-02-19 18:48:36,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6427 states, 6426 states have (on average 2.5351696234049177) internal successors, (16291), 6426 states have internal predecessors, (16291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:48:36,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6427 states to 6427 states and 16291 transitions. [2021-02-19 18:48:36,326 INFO L78 Accepts]: Start accepts. Automaton has 6427 states and 16291 transitions. Word has length 32 [2021-02-19 18:48:36,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:48:36,326 INFO L480 AbstractCegarLoop]: Abstraction has 6427 states and 16291 transitions. [2021-02-19 18:48:36,327 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 22 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) [2021-02-19 18:48:36,327 INFO L276 IsEmpty]: Start isEmpty. Operand 6427 states and 16291 transitions. [2021-02-19 18:48:36,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-02-19 18:48:36,330 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:48:36,331 INFO L506 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:48:36,531 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable841 [2021-02-19 18:48:36,531 INFO L428 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:48:36,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:48:36,531 INFO L82 PathProgramCache]: Analyzing trace with hash 1188408313, now seen corresponding path program 103 times [2021-02-19 18:48:36,531 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:48:36,531 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333295700] [2021-02-19 18:48:36,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:48:36,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:48:36,752 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 18 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 18:48:36,752 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333295700] [2021-02-19 18:48:36,752 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1104251456] [2021-02-19 18:48:36,752 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 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 [2021-02-19 18:48:36,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:48:36,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 13 conjunts are in the unsatisfiable core [2021-02-19 18:48:36,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:48:37,611 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:48:37,612 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:48:37,612 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 21 [2021-02-19 18:48:37,612 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281968621] [2021-02-19 18:48:37,612 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-02-19 18:48:37,612 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:48:37,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-02-19 18:48:37,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2021-02-19 18:48:37,612 INFO L87 Difference]: Start difference. First operand 6427 states and 16291 transitions. Second operand has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 21 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:48:41,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:48:41,338 INFO L93 Difference]: Finished difference Result 7248 states and 18012 transitions. [2021-02-19 18:48:41,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-02-19 18:48:41,341 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 21 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-02-19 18:48:41,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:48:41,349 INFO L225 Difference]: With dead ends: 7248 [2021-02-19 18:48:41,349 INFO L226 Difference]: Without dead ends: 7230 [2021-02-19 18:48:41,349 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1274 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=879, Invalid=3027, Unknown=0, NotChecked=0, Total=3906 [2021-02-19 18:48:41,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7230 states. [2021-02-19 18:48:41,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7230 to 6476. [2021-02-19 18:48:41,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6476 states, 6475 states have (on average 2.532046332046332) internal successors, (16395), 6475 states have internal predecessors, (16395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:48:41,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6476 states to 6476 states and 16395 transitions. [2021-02-19 18:48:41,415 INFO L78 Accepts]: Start accepts. Automaton has 6476 states and 16395 transitions. Word has length 32 [2021-02-19 18:48:41,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:48:41,416 INFO L480 AbstractCegarLoop]: Abstraction has 6476 states and 16395 transitions. [2021-02-19 18:48:41,416 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 21 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:48:41,416 INFO L276 IsEmpty]: Start isEmpty. Operand 6476 states and 16395 transitions. [2021-02-19 18:48:41,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-02-19 18:48:41,421 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:48:41,421 INFO L506 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:48:41,638 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable842 [2021-02-19 18:48:41,638 INFO L428 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:48:41,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:48:41,638 INFO L82 PathProgramCache]: Analyzing trace with hash -395203787, now seen corresponding path program 104 times [2021-02-19 18:48:41,638 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:48:41,638 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319356039] [2021-02-19 18:48:41,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:48:41,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:48:41,886 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 12 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 18:48:41,886 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319356039] [2021-02-19 18:48:41,886 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [246568720] [2021-02-19 18:48:41,886 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 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 [2021-02-19 18:48:41,904 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 18:48:41,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:48:41,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 13 conjunts are in the unsatisfiable core [2021-02-19 18:48:41,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:48:42,726 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 12 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:48:42,726 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:48:42,726 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 21 [2021-02-19 18:48:42,726 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501955366] [2021-02-19 18:48:42,727 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-02-19 18:48:42,727 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:48:42,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-02-19 18:48:42,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=374, Unknown=0, NotChecked=0, Total=462 [2021-02-19 18:48:42,727 INFO L87 Difference]: Start difference. First operand 6476 states and 16395 transitions. Second operand has 22 states, 22 states have (on average 2.590909090909091) internal successors, (57), 21 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) [2021-02-19 18:48:47,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:48:47,874 INFO L93 Difference]: Finished difference Result 10979 states and 27716 transitions. [2021-02-19 18:48:47,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-02-19 18:48:47,877 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.590909090909091) internal successors, (57), 21 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) Word has length 32 [2021-02-19 18:48:47,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:48:47,888 INFO L225 Difference]: With dead ends: 10979 [2021-02-19 18:48:47,888 INFO L226 Difference]: Without dead ends: 10979 [2021-02-19 18:48:47,889 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2550 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=2010, Invalid=4962, Unknown=0, NotChecked=0, Total=6972 [2021-02-19 18:48:47,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10979 states. [2021-02-19 18:48:47,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10979 to 9735. [2021-02-19 18:48:47,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9735 states, 9734 states have (on average 2.579206903636737) internal successors, (25106), 9734 states have internal predecessors, (25106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:48:47,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9735 states to 9735 states and 25106 transitions. [2021-02-19 18:48:47,997 INFO L78 Accepts]: Start accepts. Automaton has 9735 states and 25106 transitions. Word has length 32 [2021-02-19 18:48:47,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:48:47,997 INFO L480 AbstractCegarLoop]: Abstraction has 9735 states and 25106 transitions. [2021-02-19 18:48:47,997 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.590909090909091) internal successors, (57), 21 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) [2021-02-19 18:48:47,997 INFO L276 IsEmpty]: Start isEmpty. Operand 9735 states and 25106 transitions. [2021-02-19 18:48:48,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-02-19 18:48:48,004 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:48:48,004 INFO L506 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:48:48,204 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable843 [2021-02-19 18:48:48,204 INFO L428 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:48:48,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:48:48,204 INFO L82 PathProgramCache]: Analyzing trace with hash -2147285011, now seen corresponding path program 105 times [2021-02-19 18:48:48,204 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:48:48,204 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419193169] [2021-02-19 18:48:48,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:48:48,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:48:48,407 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 21 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 18:48:48,407 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419193169] [2021-02-19 18:48:48,407 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [237190673] [2021-02-19 18:48:48,407 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 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 [2021-02-19 18:48:48,425 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-02-19 18:48:48,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:48:48,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 13 conjunts are in the unsatisfiable core [2021-02-19 18:48:48,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:48:49,177 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 18 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:48:49,178 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:48:49,178 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13] total 20 [2021-02-19 18:48:49,178 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701356277] [2021-02-19 18:48:49,178 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-02-19 18:48:49,178 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:48:49,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-02-19 18:48:49,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2021-02-19 18:48:49,178 INFO L87 Difference]: Start difference. First operand 9735 states and 25106 transitions. Second operand has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 20 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:48:52,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:48:52,637 INFO L93 Difference]: Finished difference Result 10789 states and 27252 transitions. [2021-02-19 18:48:52,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-02-19 18:48:52,640 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 20 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-02-19 18:48:52,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:48:52,652 INFO L225 Difference]: With dead ends: 10789 [2021-02-19 18:48:52,652 INFO L226 Difference]: Without dead ends: 10785 [2021-02-19 18:48:52,652 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1210 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=1087, Invalid=2819, Unknown=0, NotChecked=0, Total=3906 [2021-02-19 18:48:52,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10785 states. [2021-02-19 18:48:52,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10785 to 9614. [2021-02-19 18:48:52,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9614 states, 9613 states have (on average 2.576719026318527) internal successors, (24770), 9613 states have internal predecessors, (24770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:48:52,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9614 states to 9614 states and 24770 transitions. [2021-02-19 18:48:52,771 INFO L78 Accepts]: Start accepts. Automaton has 9614 states and 24770 transitions. Word has length 32 [2021-02-19 18:48:52,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:48:52,771 INFO L480 AbstractCegarLoop]: Abstraction has 9614 states and 24770 transitions. [2021-02-19 18:48:52,771 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 20 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:48:52,771 INFO L276 IsEmpty]: Start isEmpty. Operand 9614 states and 24770 transitions. [2021-02-19 18:48:52,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-02-19 18:48:52,778 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:48:52,778 INFO L506 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:48:52,978 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable844,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:48:52,978 INFO L428 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:48:52,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:48:52,979 INFO L82 PathProgramCache]: Analyzing trace with hash 1641336019, now seen corresponding path program 106 times [2021-02-19 18:48:52,979 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:48:52,979 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289498187] [2021-02-19 18:48:52,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:48:52,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:48:53,224 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 17 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 18:48:53,225 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289498187] [2021-02-19 18:48:53,225 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2015435444] [2021-02-19 18:48:53,225 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 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 [2021-02-19 18:48:53,241 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 18:48:53,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:48:53,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 13 conjunts are in the unsatisfiable core [2021-02-19 18:48:53,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:48:54,032 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 15 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:48:54,032 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:48:54,032 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 21 [2021-02-19 18:48:54,032 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426478592] [2021-02-19 18:48:54,032 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-02-19 18:48:54,032 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:48:54,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-02-19 18:48:54,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2021-02-19 18:48:54,033 INFO L87 Difference]: Start difference. First operand 9614 states and 24770 transitions. Second operand has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 21 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:48:57,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:48:57,407 INFO L93 Difference]: Finished difference Result 11191 states and 28291 transitions. [2021-02-19 18:48:57,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-02-19 18:48:57,410 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 21 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-02-19 18:48:57,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:48:57,422 INFO L225 Difference]: With dead ends: 11191 [2021-02-19 18:48:57,422 INFO L226 Difference]: Without dead ends: 11179 [2021-02-19 18:48:57,423 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1201 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=1011, Invalid=2895, Unknown=0, NotChecked=0, Total=3906 [2021-02-19 18:48:57,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11179 states. [2021-02-19 18:48:57,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11179 to 9785. [2021-02-19 18:48:57,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9785 states, 9784 states have (on average 2.581152902698283) internal successors, (25254), 9784 states have internal predecessors, (25254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:48:57,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9785 states to 9785 states and 25254 transitions. [2021-02-19 18:48:57,536 INFO L78 Accepts]: Start accepts. Automaton has 9785 states and 25254 transitions. Word has length 32 [2021-02-19 18:48:57,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:48:57,536 INFO L480 AbstractCegarLoop]: Abstraction has 9785 states and 25254 transitions. [2021-02-19 18:48:57,536 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 21 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:48:57,536 INFO L276 IsEmpty]: Start isEmpty. Operand 9785 states and 25254 transitions. [2021-02-19 18:48:57,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-02-19 18:48:57,543 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:48:57,543 INFO L506 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:48:57,743 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable845,108 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:48:57,743 INFO L428 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:48:57,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:48:57,743 INFO L82 PathProgramCache]: Analyzing trace with hash 1414114639, now seen corresponding path program 107 times [2021-02-19 18:48:57,743 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:48:57,743 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168408392] [2021-02-19 18:48:57,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:48:57,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:48:58,002 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 14 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 18:48:58,002 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168408392] [2021-02-19 18:48:58,002 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [750613667] [2021-02-19 18:48:58,002 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 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 [2021-02-19 18:48:58,021 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-02-19 18:48:58,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:48:58,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 13 conjunts are in the unsatisfiable core [2021-02-19 18:48:58,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:48:58,858 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 13 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:48:58,858 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:48:58,858 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-02-19 18:48:58,858 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143240934] [2021-02-19 18:48:58,859 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-02-19 18:48:58,859 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:48:58,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-02-19 18:48:58,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2021-02-19 18:48:58,859 INFO L87 Difference]: Start difference. First operand 9785 states and 25254 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:49:02,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:49:02,519 INFO L93 Difference]: Finished difference Result 12038 states and 30432 transitions. [2021-02-19 18:49:02,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-02-19 18:49:02,522 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-02-19 18:49:02,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:49:02,534 INFO L225 Difference]: With dead ends: 12038 [2021-02-19 18:49:02,534 INFO L226 Difference]: Without dead ends: 12018 [2021-02-19 18:49:02,535 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1276 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=1025, Invalid=3135, Unknown=0, NotChecked=0, Total=4160 [2021-02-19 18:49:02,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12018 states. [2021-02-19 18:49:02,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12018 to 10809. [2021-02-19 18:49:02,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10809 states, 10808 states have (on average 2.588823094004441) internal successors, (27980), 10808 states have internal predecessors, (27980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:49:02,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10809 states to 10809 states and 27980 transitions. [2021-02-19 18:49:02,663 INFO L78 Accepts]: Start accepts. Automaton has 10809 states and 27980 transitions. Word has length 32 [2021-02-19 18:49:02,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:49:02,663 INFO L480 AbstractCegarLoop]: Abstraction has 10809 states and 27980 transitions. [2021-02-19 18:49:02,663 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:49:02,663 INFO L276 IsEmpty]: Start isEmpty. Operand 10809 states and 27980 transitions. [2021-02-19 18:49:02,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-02-19 18:49:02,669 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:49:02,669 INFO L506 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:49:02,870 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable846,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:49:02,870 INFO L428 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:49:02,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:49:02,870 INFO L82 PathProgramCache]: Analyzing trace with hash 2097700555, now seen corresponding path program 108 times [2021-02-19 18:49:02,870 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:49:02,870 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712200706] [2021-02-19 18:49:02,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:49:02,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:49:03,205 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 15 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 18:49:03,205 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712200706] [2021-02-19 18:49:03,205 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1592668596] [2021-02-19 18:49:03,205 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 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 [2021-02-19 18:49:03,223 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-02-19 18:49:03,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:49:03,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 13 conjunts are in the unsatisfiable core [2021-02-19 18:49:03,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:49:04,086 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 15 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:49:04,086 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:49:04,086 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-02-19 18:49:04,086 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460745695] [2021-02-19 18:49:04,086 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-02-19 18:49:04,087 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:49:04,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-02-19 18:49:04,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=449, Unknown=0, NotChecked=0, Total=552 [2021-02-19 18:49:04,087 INFO L87 Difference]: Start difference. First operand 10809 states and 27980 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:49:07,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:49:07,734 INFO L93 Difference]: Finished difference Result 13469 states and 34114 transitions. [2021-02-19 18:49:07,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-02-19 18:49:07,737 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-02-19 18:49:07,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:49:07,752 INFO L225 Difference]: With dead ends: 13469 [2021-02-19 18:49:07,752 INFO L226 Difference]: Without dead ends: 13441 [2021-02-19 18:49:07,753 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1459 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=1128, Invalid=3564, Unknown=0, NotChecked=0, Total=4692 [2021-02-19 18:49:07,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13441 states. [2021-02-19 18:49:07,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13441 to 12135. [2021-02-19 18:49:07,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12135 states, 12134 states have (on average 2.5943629470908194) internal successors, (31480), 12134 states have internal predecessors, (31480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:49:07,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12135 states to 12135 states and 31480 transitions. [2021-02-19 18:49:07,925 INFO L78 Accepts]: Start accepts. Automaton has 12135 states and 31480 transitions. Word has length 32 [2021-02-19 18:49:07,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:49:07,925 INFO L480 AbstractCegarLoop]: Abstraction has 12135 states and 31480 transitions. [2021-02-19 18:49:07,925 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:49:07,925 INFO L276 IsEmpty]: Start isEmpty. Operand 12135 states and 31480 transitions. [2021-02-19 18:49:07,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-02-19 18:49:07,933 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:49:07,933 INFO L506 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:49:08,134 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable847 [2021-02-19 18:49:08,134 INFO L428 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:49:08,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:49:08,135 INFO L82 PathProgramCache]: Analyzing trace with hash 1893769543, now seen corresponding path program 109 times [2021-02-19 18:49:08,135 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:49:08,135 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239389452] [2021-02-19 18:49:08,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:49:08,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:49:08,464 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 21 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:49:08,464 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239389452] [2021-02-19 18:49:08,464 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [950118209] [2021-02-19 18:49:08,464 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 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 [2021-02-19 18:49:08,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:49:08,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 13 conjunts are in the unsatisfiable core [2021-02-19 18:49:08,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:49:09,375 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 21 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:49:09,375 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:49:09,375 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-02-19 18:49:09,375 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756655259] [2021-02-19 18:49:09,376 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-02-19 18:49:09,376 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:49:09,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-02-19 18:49:09,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=483, Unknown=0, NotChecked=0, Total=600 [2021-02-19 18:49:09,376 INFO L87 Difference]: Start difference. First operand 12135 states and 31480 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:49:13,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:49:13,639 INFO L93 Difference]: Finished difference Result 13714 states and 34911 transitions. [2021-02-19 18:49:13,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-02-19 18:49:13,642 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-02-19 18:49:13,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:49:13,657 INFO L225 Difference]: With dead ends: 13714 [2021-02-19 18:49:13,657 INFO L226 Difference]: Without dead ends: 13678 [2021-02-19 18:49:13,658 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1785 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=1318, Invalid=4232, Unknown=0, NotChecked=0, Total=5550 [2021-02-19 18:49:13,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13678 states. [2021-02-19 18:49:13,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13678 to 12498. [2021-02-19 18:49:13,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12498 states, 12497 states have (on average 2.5989437464991596) internal successors, (32479), 12497 states have internal predecessors, (32479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:49:13,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12498 states to 12498 states and 32479 transitions. [2021-02-19 18:49:13,809 INFO L78 Accepts]: Start accepts. Automaton has 12498 states and 32479 transitions. Word has length 32 [2021-02-19 18:49:13,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:49:13,809 INFO L480 AbstractCegarLoop]: Abstraction has 12498 states and 32479 transitions. [2021-02-19 18:49:13,809 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:49:13,809 INFO L276 IsEmpty]: Start isEmpty. Operand 12498 states and 32479 transitions. [2021-02-19 18:49:13,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-02-19 18:49:13,817 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:49:13,817 INFO L506 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:49:14,018 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable848,111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:49:14,018 INFO L428 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:49:14,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:49:14,018 INFO L82 PathProgramCache]: Analyzing trace with hash 39947365, now seen corresponding path program 110 times [2021-02-19 18:49:14,018 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:49:14,018 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222650280] [2021-02-19 18:49:14,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:49:14,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:49:15,426 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 4 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:49:15,426 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222650280] [2021-02-19 18:49:15,426 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1504552337] [2021-02-19 18:49:15,426 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 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 [2021-02-19 18:49:15,445 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 18:49:15,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:49:15,446 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 43 conjunts are in the unsatisfiable core [2021-02-19 18:49:15,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:49:17,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:49:17,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:49:17,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:49:17,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:49:17,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:49:17,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:49:17,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:49:17,036 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:49:17,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:49:17,040 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:49:17,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:49:17,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:49:17,047 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:49:17,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:49:17,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:49:17,055 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:49:17,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:49:17,060 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:49:17,062 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 10 disjoint index pairs (out of 45 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 7 [2021-02-19 18:49:17,066 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:49:17,087 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:49:17,090 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:49:17,091 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:91, output treesize:7 [2021-02-19 18:49:17,197 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:49:17,197 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:49:17,197 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 14] total 28 [2021-02-19 18:49:17,197 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141014635] [2021-02-19 18:49:17,197 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-02-19 18:49:17,197 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:49:17,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-02-19 18:49:17,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=712, Unknown=0, NotChecked=0, Total=812 [2021-02-19 18:49:17,198 INFO L87 Difference]: Start difference. First operand 12498 states and 32479 transitions. Second operand has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:49:17,928 WARN L202 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 23 [2021-02-19 18:49:18,541 WARN L202 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 23 [2021-02-19 18:49:19,046 WARN L202 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 42 [2021-02-19 18:49:19,296 WARN L202 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 30 [2021-02-19 18:49:19,619 WARN L202 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 29 [2021-02-19 18:49:20,062 WARN L202 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 40 [2021-02-19 18:49:20,600 WARN L202 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 30 [2021-02-19 18:49:21,147 WARN L202 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 50 [2021-02-19 18:49:21,458 WARN L202 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2021-02-19 18:49:21,799 WARN L202 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 54 [2021-02-19 18:49:23,115 WARN L202 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 48 [2021-02-19 18:49:23,448 WARN L202 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 51 [2021-02-19 18:49:24,269 WARN L202 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 34 [2021-02-19 18:49:25,153 WARN L202 SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 51 [2021-02-19 18:49:25,707 WARN L202 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 41 [2021-02-19 18:49:26,827 WARN L202 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 43 [2021-02-19 18:49:27,123 WARN L202 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2021-02-19 18:49:27,722 WARN L202 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 48 [2021-02-19 18:49:28,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:49:28,239 INFO L93 Difference]: Finished difference Result 15578 states and 39720 transitions. [2021-02-19 18:49:28,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-02-19 18:49:28,243 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-02-19 18:49:28,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:49:28,260 INFO L225 Difference]: With dead ends: 15578 [2021-02-19 18:49:28,260 INFO L226 Difference]: Without dead ends: 15571 [2021-02-19 18:49:28,261 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 998 ImplicationChecksByTransitivity, 9.8s TimeCoverageRelationStatistics Valid=616, Invalid=3674, Unknown=0, NotChecked=0, Total=4290 [2021-02-19 18:49:28,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15571 states. [2021-02-19 18:49:28,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15571 to 12680. [2021-02-19 18:49:28,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12680 states, 12679 states have (on average 2.598785393169808) internal successors, (32950), 12679 states have internal predecessors, (32950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:49:28,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12680 states to 12680 states and 32950 transitions. [2021-02-19 18:49:28,422 INFO L78 Accepts]: Start accepts. Automaton has 12680 states and 32950 transitions. Word has length 34 [2021-02-19 18:49:28,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:49:28,422 INFO L480 AbstractCegarLoop]: Abstraction has 12680 states and 32950 transitions. [2021-02-19 18:49:28,423 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:49:28,423 INFO L276 IsEmpty]: Start isEmpty. Operand 12680 states and 32950 transitions. [2021-02-19 18:49:28,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-02-19 18:49:28,431 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:49:28,431 INFO L506 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:49:28,632 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable849,112 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:49:28,632 INFO L428 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:49:28,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:49:28,632 INFO L82 PathProgramCache]: Analyzing trace with hash 1434860275, now seen corresponding path program 111 times [2021-02-19 18:49:28,632 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:49:28,632 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895041820] [2021-02-19 18:49:28,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:49:28,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:49:30,101 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 4 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:49:30,101 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895041820] [2021-02-19 18:49:30,101 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1747665757] [2021-02-19 18:49:30,101 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 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 [2021-02-19 18:49:30,122 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-02-19 18:49:30,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:49:30,122 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 47 conjunts are in the unsatisfiable core [2021-02-19 18:49:30,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:49:33,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:49:33,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:49:33,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:49:33,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:49:33,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:49:33,257 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:49:33,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:49:33,276 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:49:33,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:49:33,292 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:49:33,293 INFO L244 Elim1Store]: Index analysis took 147 ms [2021-02-19 18:49:33,638 WARN L202 SmtUtils]: Spent 343.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2021-02-19 18:49:33,639 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:49:33,639 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 6 disjoint index pairs (out of 45 index pairs), introduced 7 new quantified variables, introduced 27 case distinctions, treesize of input 85 treesize of output 171 [2021-02-19 18:49:35,386 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 5 xjuncts. [2021-02-19 18:49:36,208 WARN L202 SmtUtils]: Spent 820.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 24 [2021-02-19 18:49:36,209 INFO L628 ElimStorePlain]: treesize reduction 2048, result has 1.7 percent of original size [2021-02-19 18:49:36,224 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 18:49:36,225 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:107, output treesize:22 [2021-02-19 18:49:36,504 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:49:36,504 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:49:36,505 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19] total 33 [2021-02-19 18:49:36,505 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446033166] [2021-02-19 18:49:36,505 INFO L460 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-02-19 18:49:36,505 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:49:36,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-02-19 18:49:36,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=992, Unknown=0, NotChecked=0, Total=1122 [2021-02-19 18:49:36,505 INFO L87 Difference]: Start difference. First operand 12680 states and 32950 transitions. Second operand has 34 states, 34 states have (on average 1.7941176470588236) internal successors, (61), 33 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:49:37,740 WARN L202 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 25 [2021-02-19 18:49:38,302 WARN L202 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 44 [2021-02-19 18:49:38,957 WARN L202 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 36 [2021-02-19 18:49:39,460 WARN L202 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 46 [2021-02-19 18:49:40,531 WARN L202 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 28 [2021-02-19 18:49:41,563 WARN L202 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 34 [2021-02-19 18:49:42,207 WARN L202 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-02-19 18:49:42,779 WARN L202 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 31 [2021-02-19 18:49:43,402 WARN L202 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 53 [2021-02-19 18:49:44,084 WARN L202 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 59 [2021-02-19 18:49:44,535 WARN L202 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 57 [2021-02-19 18:49:46,007 WARN L202 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 53 [2021-02-19 18:49:46,497 WARN L202 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 49 [2021-02-19 18:49:47,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:49:47,241 INFO L93 Difference]: Finished difference Result 15454 states and 39465 transitions. [2021-02-19 18:49:47,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-02-19 18:49:47,245 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.7941176470588236) internal successors, (61), 33 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-02-19 18:49:47,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:49:47,259 INFO L225 Difference]: With dead ends: 15454 [2021-02-19 18:49:47,259 INFO L226 Difference]: Without dead ends: 15384 [2021-02-19 18:49:47,260 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 895 ImplicationChecksByTransitivity, 9.8s TimeCoverageRelationStatistics Valid=525, Invalid=3257, Unknown=0, NotChecked=0, Total=3782 [2021-02-19 18:49:47,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15384 states. [2021-02-19 18:49:47,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15384 to 12675. [2021-02-19 18:49:47,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12675 states, 12674 states have (on average 2.5986271106201673) internal successors, (32935), 12674 states have internal predecessors, (32935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:49:47,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12675 states to 12675 states and 32935 transitions. [2021-02-19 18:49:47,408 INFO L78 Accepts]: Start accepts. Automaton has 12675 states and 32935 transitions. Word has length 34 [2021-02-19 18:49:47,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:49:47,408 INFO L480 AbstractCegarLoop]: Abstraction has 12675 states and 32935 transitions. [2021-02-19 18:49:47,408 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 1.7941176470588236) internal successors, (61), 33 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:49:47,408 INFO L276 IsEmpty]: Start isEmpty. Operand 12675 states and 32935 transitions. [2021-02-19 18:49:47,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-02-19 18:49:47,417 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:49:47,417 INFO L506 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:49:47,617 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable850 [2021-02-19 18:49:47,618 INFO L428 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:49:47,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:49:47,618 INFO L82 PathProgramCache]: Analyzing trace with hash -1816825425, now seen corresponding path program 112 times [2021-02-19 18:49:47,618 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:49:47,618 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232415897] [2021-02-19 18:49:47,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:49:47,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:49:48,231 WARN L202 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 32 [2021-02-19 18:49:48,391 WARN L202 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 29 [2021-02-19 18:49:48,574 WARN L202 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 26 [2021-02-19 18:49:48,766 WARN L202 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 26 [2021-02-19 18:49:49,335 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 4 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:49:49,335 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232415897] [2021-02-19 18:49:49,335 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [434383368] [2021-02-19 18:49:49,335 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 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 [2021-02-19 18:49:49,357 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 18:49:49,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:49:49,358 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 43 conjunts are in the unsatisfiable core [2021-02-19 18:49:49,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:49:50,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:49:50,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:49:50,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:49:50,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:49:51,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:49:51,002 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:49:51,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:49:51,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:49:51,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:49:51,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:49:51,017 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:49:51,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:49:51,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:49:51,026 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:49:51,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:49:51,031 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:49:51,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:49:51,035 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:49:51,037 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 10 disjoint index pairs (out of 45 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 7 [2021-02-19 18:49:51,042 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:49:51,065 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:49:51,070 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:49:51,070 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:91, output treesize:7 [2021-02-19 18:49:51,265 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:49:51,265 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:49:51,265 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 14] total 28 [2021-02-19 18:49:51,265 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092930447] [2021-02-19 18:49:51,265 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-02-19 18:49:51,266 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:49:51,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-02-19 18:49:51,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=712, Unknown=0, NotChecked=0, Total=812 [2021-02-19 18:49:51,266 INFO L87 Difference]: Start difference. First operand 12675 states and 32935 transitions. Second operand has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:49:52,085 WARN L202 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 23 [2021-02-19 18:49:52,360 WARN L202 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 22 [2021-02-19 18:49:52,810 WARN L202 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 25 [2021-02-19 18:49:53,240 WARN L202 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 29 [2021-02-19 18:49:53,529 WARN L202 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 30 [2021-02-19 18:49:53,803 WARN L202 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 30 [2021-02-19 18:49:54,232 WARN L202 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 33 [2021-02-19 18:49:54,808 WARN L202 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 33 [2021-02-19 18:49:55,352 WARN L202 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 28 [2021-02-19 18:49:55,692 WARN L202 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 28 [2021-02-19 18:49:56,142 WARN L202 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 34 [2021-02-19 18:49:56,527 WARN L202 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 27 [2021-02-19 18:49:56,748 WARN L202 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-02-19 18:49:57,200 WARN L202 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 26 [2021-02-19 18:49:57,540 WARN L202 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 31 [2021-02-19 18:49:57,800 WARN L202 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 25 [2021-02-19 18:49:58,059 WARN L202 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 30 [2021-02-19 18:49:58,392 WARN L202 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 37 [2021-02-19 18:49:58,744 WARN L202 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 37 [2021-02-19 18:49:59,300 WARN L202 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 41 [2021-02-19 18:49:59,730 WARN L202 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 45 [2021-02-19 18:50:00,134 WARN L202 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2021-02-19 18:50:00,517 WARN L202 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 43 [2021-02-19 18:50:00,831 WARN L202 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 47 [2021-02-19 18:50:01,444 WARN L202 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 48 [2021-02-19 18:50:01,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:50:01,977 INFO L93 Difference]: Finished difference Result 15621 states and 39863 transitions. [2021-02-19 18:50:01,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-02-19 18:50:01,982 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-02-19 18:50:01,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:50:02,002 INFO L225 Difference]: With dead ends: 15621 [2021-02-19 18:50:02,002 INFO L226 Difference]: Without dead ends: 15570 [2021-02-19 18:50:02,002 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 877 ImplicationChecksByTransitivity, 9.9s TimeCoverageRelationStatistics Valid=549, Invalid=3233, Unknown=0, NotChecked=0, Total=3782 [2021-02-19 18:50:02,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15570 states. [2021-02-19 18:50:02,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15570 to 12775. [2021-02-19 18:50:02,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12775 states, 12774 states have (on average 2.5945670894003445) internal successors, (33143), 12774 states have internal predecessors, (33143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:50:02,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12775 states to 12775 states and 33143 transitions. [2021-02-19 18:50:02,178 INFO L78 Accepts]: Start accepts. Automaton has 12775 states and 33143 transitions. Word has length 34 [2021-02-19 18:50:02,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:50:02,178 INFO L480 AbstractCegarLoop]: Abstraction has 12775 states and 33143 transitions. [2021-02-19 18:50:02,178 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:50:02,179 INFO L276 IsEmpty]: Start isEmpty. Operand 12775 states and 33143 transitions. [2021-02-19 18:50:02,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-02-19 18:50:02,189 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:50:02,189 INFO L506 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:50:02,389 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1149 [2021-02-19 18:50:02,389 INFO L428 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:50:02,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:50:02,389 INFO L82 PathProgramCache]: Analyzing trace with hash -327473301, now seen corresponding path program 113 times [2021-02-19 18:50:02,390 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:50:02,390 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469453112] [2021-02-19 18:50:02,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:50:02,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:50:03,073 WARN L202 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 32 [2021-02-19 18:50:03,250 WARN L202 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 29 [2021-02-19 18:50:03,446 WARN L202 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 26 [2021-02-19 18:50:03,775 WARN L202 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 23 [2021-02-19 18:50:03,955 WARN L202 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 20 [2021-02-19 18:50:04,248 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 4 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:50:04,248 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469453112] [2021-02-19 18:50:04,248 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1617409211] [2021-02-19 18:50:04,248 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 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 [2021-02-19 18:50:04,276 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-02-19 18:50:04,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:50:04,277 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 43 conjunts are in the unsatisfiable core [2021-02-19 18:50:04,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:50:06,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:50:06,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:50:06,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:50:06,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:50:06,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:50:06,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:50:06,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:50:06,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:50:06,114 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:50:06,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:50:06,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:50:06,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:50:06,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:50:06,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:50:06,132 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:50:06,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:50:06,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:50:06,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:50:06,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:50:06,147 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:50:06,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:50:06,152 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:50:06,153 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:50:06,155 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 10 disjoint index pairs (out of 45 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 7 [2021-02-19 18:50:06,160 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:50:06,184 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:50:06,188 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:50:06,188 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:91, output treesize:7 [2021-02-19 18:50:06,301 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:50:06,301 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:50:06,301 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 14] total 28 [2021-02-19 18:50:06,301 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733311744] [2021-02-19 18:50:06,301 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-02-19 18:50:06,301 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:50:06,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-02-19 18:50:06,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=711, Unknown=0, NotChecked=0, Total=812 [2021-02-19 18:50:06,302 INFO L87 Difference]: Start difference. First operand 12775 states and 33143 transitions. Second operand has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:50:06,873 WARN L202 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 16 [2021-02-19 18:50:07,213 WARN L202 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 18 [2021-02-19 18:50:07,542 WARN L202 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 23 [2021-02-19 18:50:07,828 WARN L202 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 23 [2021-02-19 18:50:08,244 WARN L202 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 25 [2021-02-19 18:50:08,685 WARN L202 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 29 [2021-02-19 18:50:09,057 WARN L202 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 30 [2021-02-19 18:50:09,602 WARN L202 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 30 [2021-02-19 18:50:09,937 WARN L202 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 20 [2021-02-19 18:50:10,307 WARN L202 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 30 [2021-02-19 18:50:10,605 WARN L202 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2021-02-19 18:50:10,942 WARN L202 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 28 [2021-02-19 18:50:11,340 WARN L202 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 28 [2021-02-19 18:50:11,687 WARN L202 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 34 [2021-02-19 18:50:12,058 WARN L202 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 27 [2021-02-19 18:50:12,309 WARN L202 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 25 [2021-02-19 18:50:12,819 WARN L202 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 26 [2021-02-19 18:50:13,211 WARN L202 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 31 [2021-02-19 18:50:13,545 WARN L202 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 25 [2021-02-19 18:50:13,807 WARN L202 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 30 [2021-02-19 18:50:14,162 WARN L202 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 37 [2021-02-19 18:50:14,416 WARN L202 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2021-02-19 18:50:14,796 WARN L202 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 37 [2021-02-19 18:50:15,202 WARN L202 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 24 [2021-02-19 18:50:15,646 WARN L202 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 43 [2021-02-19 18:50:16,032 WARN L202 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 38 [2021-02-19 18:50:16,454 WARN L202 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 43 [2021-02-19 18:50:16,881 WARN L202 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 47 [2021-02-19 18:50:17,492 WARN L202 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 48 [2021-02-19 18:50:17,835 WARN L202 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 47 [2021-02-19 18:50:18,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:50:18,505 INFO L93 Difference]: Finished difference Result 16093 states and 40937 transitions. [2021-02-19 18:50:18,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-02-19 18:50:18,510 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-02-19 18:50:18,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:50:18,529 INFO L225 Difference]: With dead ends: 16093 [2021-02-19 18:50:18,529 INFO L226 Difference]: Without dead ends: 16045 [2021-02-19 18:50:18,529 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 916 ImplicationChecksByTransitivity, 11.0s TimeCoverageRelationStatistics Valid=552, Invalid=3354, Unknown=0, NotChecked=0, Total=3906 [2021-02-19 18:50:18,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16045 states. [2021-02-19 18:50:18,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16045 to 12969. [2021-02-19 18:50:18,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12969 states, 12968 states have (on average 2.5905305367057374) internal successors, (33594), 12968 states have internal predecessors, (33594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:50:18,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12969 states to 12969 states and 33594 transitions. [2021-02-19 18:50:18,745 INFO L78 Accepts]: Start accepts. Automaton has 12969 states and 33594 transitions. Word has length 34 [2021-02-19 18:50:18,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:50:18,745 INFO L480 AbstractCegarLoop]: Abstraction has 12969 states and 33594 transitions. [2021-02-19 18:50:18,745 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:50:18,745 INFO L276 IsEmpty]: Start isEmpty. Operand 12969 states and 33594 transitions. [2021-02-19 18:50:18,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-02-19 18:50:18,753 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:50:18,753 INFO L506 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:50:18,953 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1150,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:50:18,953 INFO L428 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:50:18,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:50:18,954 INFO L82 PathProgramCache]: Analyzing trace with hash 1174999011, now seen corresponding path program 114 times [2021-02-19 18:50:18,954 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:50:18,954 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203406397] [2021-02-19 18:50:18,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:50:18,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:50:19,642 WARN L202 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 32 [2021-02-19 18:50:19,824 WARN L202 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 29 [2021-02-19 18:50:20,002 WARN L202 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 26 [2021-02-19 18:50:20,351 WARN L202 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 20 [2021-02-19 18:50:20,790 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 4 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:50:20,790 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203406397] [2021-02-19 18:50:20,790 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1997002699] [2021-02-19 18:50:20,790 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 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 [2021-02-19 18:50:20,811 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-02-19 18:50:20,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:50:20,812 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 47 conjunts are in the unsatisfiable core [2021-02-19 18:50:20,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:50:23,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:50:23,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:50:23,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:50:23,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:50:23,352 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:50:23,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:50:23,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:50:23,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:50:23,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:50:23,377 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:50:23,407 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:50:23,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:50:23,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:50:23,425 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:50:23,659 WARN L202 SmtUtils]: Spent 231.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2021-02-19 18:50:23,660 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:50:23,661 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 6 disjoint index pairs (out of 45 index pairs), introduced 6 new quantified variables, introduced 17 case distinctions, treesize of input 81 treesize of output 95 [2021-02-19 18:50:23,720 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-02-19 18:50:23,967 WARN L202 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 27 [2021-02-19 18:50:23,968 INFO L628 ElimStorePlain]: treesize reduction 180, result has 17.4 percent of original size [2021-02-19 18:50:23,985 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:50:23,985 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:106, output treesize:50 [2021-02-19 18:50:24,375 WARN L202 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 21 [2021-02-19 18:50:24,711 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:50:24,711 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:50:24,711 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19] total 33 [2021-02-19 18:50:24,711 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289014960] [2021-02-19 18:50:24,711 INFO L460 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-02-19 18:50:24,711 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:50:24,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-02-19 18:50:24,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=983, Unknown=0, NotChecked=0, Total=1122 [2021-02-19 18:50:24,712 INFO L87 Difference]: Start difference. First operand 12969 states and 33594 transitions. Second operand has 34 states, 34 states have (on average 1.7941176470588236) internal successors, (61), 33 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:50:25,364 WARN L202 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 19 [2021-02-19 18:50:25,651 WARN L202 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 20 [2021-02-19 18:50:26,251 WARN L202 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 26 [2021-02-19 18:50:26,798 WARN L202 SmtUtils]: Spent 290.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 56 [2021-02-19 18:50:27,089 WARN L202 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 26 [2021-02-19 18:50:27,402 WARN L202 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 15 [2021-02-19 18:50:27,825 WARN L202 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 21 [2021-02-19 18:50:28,310 WARN L202 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 29 [2021-02-19 18:50:29,106 WARN L202 SmtUtils]: Spent 418.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 28 [2021-02-19 18:50:29,603 WARN L202 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 29 [2021-02-19 18:50:29,929 WARN L202 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 16 [2021-02-19 18:50:30,472 WARN L202 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 35 [2021-02-19 18:50:30,890 WARN L202 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 22 [2021-02-19 18:50:31,279 WARN L202 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 54 [2021-02-19 18:50:31,526 WARN L202 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 17 [2021-02-19 18:50:32,377 WARN L202 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 33 [2021-02-19 18:50:32,827 WARN L202 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 24 [2021-02-19 18:50:33,308 WARN L202 SmtUtils]: Spent 374.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 39 [2021-02-19 18:50:33,602 WARN L202 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 17 [2021-02-19 18:50:34,032 WARN L202 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 31 [2021-02-19 18:50:34,521 WARN L202 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 30 [2021-02-19 18:50:34,928 WARN L202 SmtUtils]: Spent 279.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 32 [2021-02-19 18:50:35,229 WARN L202 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 38 [2021-02-19 18:50:35,573 WARN L202 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 26 [2021-02-19 18:50:35,982 WARN L202 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 36 [2021-02-19 18:50:36,451 WARN L202 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 27 [2021-02-19 18:50:36,674 WARN L202 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 25 [2021-02-19 18:50:37,128 WARN L202 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 46 [2021-02-19 18:50:37,376 WARN L202 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 28 [2021-02-19 18:50:37,750 WARN L202 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 35 [2021-02-19 18:50:38,139 WARN L202 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 33 [2021-02-19 18:50:38,407 WARN L202 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 23 [2021-02-19 18:50:38,711 WARN L202 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 25 [2021-02-19 18:50:39,192 WARN L202 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 28 [2021-02-19 18:50:39,654 WARN L202 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 30 [2021-02-19 18:50:39,964 WARN L202 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 30 [2021-02-19 18:50:40,352 WARN L202 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 29 [2021-02-19 18:50:40,734 WARN L202 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 37 [2021-02-19 18:50:41,264 WARN L202 SmtUtils]: Spent 422.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 32 [2021-02-19 18:50:41,567 WARN L202 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 25 [2021-02-19 18:50:41,863 WARN L202 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 27 [2021-02-19 18:50:42,476 WARN L202 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 38 [2021-02-19 18:50:42,754 WARN L202 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 24 [2021-02-19 18:50:43,535 WARN L202 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 43 [2021-02-19 18:50:44,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:50:44,084 INFO L93 Difference]: Finished difference Result 17247 states and 43500 transitions. [2021-02-19 18:50:44,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-02-19 18:50:44,089 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.7941176470588236) internal successors, (61), 33 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-02-19 18:50:44,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:50:44,110 INFO L225 Difference]: With dead ends: 17247 [2021-02-19 18:50:44,111 INFO L226 Difference]: Without dead ends: 17229 [2021-02-19 18:50:44,111 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2067 ImplicationChecksByTransitivity, 18.9s TimeCoverageRelationStatistics Valid=1094, Invalid=5878, Unknown=0, NotChecked=0, Total=6972 [2021-02-19 18:50:44,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17229 states. [2021-02-19 18:50:44,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17229 to 13164. [2021-02-19 18:50:44,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13164 states, 13163 states have (on average 2.5889994682063358) internal successors, (34079), 13163 states have internal predecessors, (34079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:50:44,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13164 states to 13164 states and 34079 transitions. [2021-02-19 18:50:44,296 INFO L78 Accepts]: Start accepts. Automaton has 13164 states and 34079 transitions. Word has length 34 [2021-02-19 18:50:44,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:50:44,296 INFO L480 AbstractCegarLoop]: Abstraction has 13164 states and 34079 transitions. [2021-02-19 18:50:44,296 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 1.7941176470588236) internal successors, (61), 33 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:50:44,296 INFO L276 IsEmpty]: Start isEmpty. Operand 13164 states and 34079 transitions. [2021-02-19 18:50:44,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-02-19 18:50:44,310 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:50:44,310 INFO L506 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:50:44,523 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1151,116 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:50:44,523 INFO L428 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:50:44,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:50:44,523 INFO L82 PathProgramCache]: Analyzing trace with hash -41852411, now seen corresponding path program 115 times [2021-02-19 18:50:44,524 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:50:44,524 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941456475] [2021-02-19 18:50:44,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:50:44,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:50:45,295 WARN L202 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 32 [2021-02-19 18:50:45,494 WARN L202 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 29 [2021-02-19 18:50:45,673 WARN L202 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 26 [2021-02-19 18:50:46,006 WARN L202 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 20 [2021-02-19 18:50:46,315 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 4 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:50:46,315 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941456475] [2021-02-19 18:50:46,315 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1454577729] [2021-02-19 18:50:46,315 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 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 [2021-02-19 18:50:46,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:50:46,335 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 43 conjunts are in the unsatisfiable core [2021-02-19 18:50:46,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:50:48,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:50:48,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:50:48,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:50:48,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:50:48,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:50:48,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:50:48,335 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:50:48,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:50:48,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:50:48,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:50:48,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:50:48,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:50:48,356 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:50:48,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:50:48,361 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:50:48,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:50:48,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:50:48,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:50:48,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:50:48,379 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:50:48,381 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:50:48,382 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 10 disjoint index pairs (out of 45 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 7 [2021-02-19 18:50:48,388 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:50:48,415 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:50:48,420 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:50:48,420 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:91, output treesize:7 [2021-02-19 18:50:48,561 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:50:48,561 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:50:48,561 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14] total 27 [2021-02-19 18:50:48,561 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418387951] [2021-02-19 18:50:48,562 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-02-19 18:50:48,562 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:50:48,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-02-19 18:50:48,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=673, Unknown=0, NotChecked=0, Total=756 [2021-02-19 18:50:48,562 INFO L87 Difference]: Start difference. First operand 13164 states and 34079 transitions. Second operand has 28 states, 28 states have (on average 2.107142857142857) internal successors, (59), 27 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) [2021-02-19 18:50:49,190 WARN L202 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 24 [2021-02-19 18:50:49,772 WARN L202 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 18 [2021-02-19 18:50:50,596 WARN L202 SmtUtils]: Spent 283.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 37 [2021-02-19 18:50:50,895 WARN L202 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 24 [2021-02-19 18:50:51,374 WARN L202 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 25 [2021-02-19 18:50:52,046 WARN L202 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 29 [2021-02-19 18:50:52,641 WARN L202 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 30 [2021-02-19 18:50:53,421 WARN L202 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 33 [2021-02-19 18:50:53,761 WARN L202 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 20 [2021-02-19 18:50:54,171 WARN L202 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 33 [2021-02-19 18:50:54,531 WARN L202 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-02-19 18:50:54,874 WARN L202 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 28 [2021-02-19 18:50:55,301 WARN L202 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 28 [2021-02-19 18:50:55,590 WARN L202 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 27 [2021-02-19 18:50:55,895 WARN L202 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 34 [2021-02-19 18:50:56,284 WARN L202 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 27 [2021-02-19 18:50:56,507 WARN L202 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 25 [2021-02-19 18:50:56,857 WARN L202 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 26 [2021-02-19 18:50:57,273 WARN L202 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 31 [2021-02-19 18:50:57,578 WARN L202 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 25 [2021-02-19 18:50:57,851 WARN L202 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 30 [2021-02-19 18:50:58,334 WARN L202 SmtUtils]: Spent 288.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 50 [2021-02-19 18:50:58,913 WARN L202 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 37 [2021-02-19 18:50:59,286 WARN L202 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 24 [2021-02-19 18:50:59,794 WARN L202 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 44 [2021-02-19 18:51:00,135 WARN L202 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 38 [2021-02-19 18:51:00,726 WARN L202 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2021-02-19 18:51:01,188 WARN L202 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 46 [2021-02-19 18:51:01,954 WARN L202 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 36 [2021-02-19 18:51:02,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:51:02,706 INFO L93 Difference]: Finished difference Result 13713 states and 35208 transitions. [2021-02-19 18:51:02,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-02-19 18:51:02,711 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.107142857142857) internal successors, (59), 27 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) Word has length 34 [2021-02-19 18:51:02,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:51:02,729 INFO L225 Difference]: With dead ends: 13713 [2021-02-19 18:51:02,729 INFO L226 Difference]: Without dead ends: 13702 [2021-02-19 18:51:02,729 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1009 ImplicationChecksByTransitivity, 12.0s TimeCoverageRelationStatistics Valid=473, Invalid=3559, Unknown=0, NotChecked=0, Total=4032 [2021-02-19 18:51:02,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13702 states. [2021-02-19 18:51:02,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13702 to 13248. [2021-02-19 18:51:02,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13248 states, 13247 states have (on average 2.587529251906092) internal successors, (34277), 13247 states have internal predecessors, (34277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:51:02,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13248 states to 13248 states and 34277 transitions. [2021-02-19 18:51:02,890 INFO L78 Accepts]: Start accepts. Automaton has 13248 states and 34277 transitions. Word has length 34 [2021-02-19 18:51:02,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:51:02,890 INFO L480 AbstractCegarLoop]: Abstraction has 13248 states and 34277 transitions. [2021-02-19 18:51:02,890 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.107142857142857) internal successors, (59), 27 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) [2021-02-19 18:51:02,890 INFO L276 IsEmpty]: Start isEmpty. Operand 13248 states and 34277 transitions. [2021-02-19 18:51:02,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-02-19 18:51:02,899 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:51:02,899 INFO L506 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:51:03,100 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1164,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:51:03,100 INFO L428 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:51:03,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:51:03,100 INFO L82 PathProgramCache]: Analyzing trace with hash 1251271987, now seen corresponding path program 116 times [2021-02-19 18:51:03,100 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:51:03,100 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662587632] [2021-02-19 18:51:03,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:51:03,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:51:04,246 WARN L202 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 20 [2021-02-19 18:51:04,619 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 1 proven. 46 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 18:51:04,620 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662587632] [2021-02-19 18:51:04,620 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1005412594] [2021-02-19 18:51:04,620 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 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 [2021-02-19 18:51:04,638 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 18:51:04,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:51:04,639 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 43 conjunts are in the unsatisfiable core [2021-02-19 18:51:04,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:51:06,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:51:06,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:51:06,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:51:06,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:51:06,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:51:06,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:51:06,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:51:06,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:51:06,382 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:51:06,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:51:06,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:51:06,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:51:06,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:51:06,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:51:06,435 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:51:06,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:51:06,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:51:06,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:51:06,448 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:51:06,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:51:06,453 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:51:06,455 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:51:06,455 INFO L244 Elim1Store]: Index analysis took 104 ms [2021-02-19 18:51:06,457 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 10 disjoint index pairs (out of 45 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 7 [2021-02-19 18:51:06,462 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:51:06,489 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:51:06,494 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:51:06,494 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:91, output treesize:7 [2021-02-19 18:51:06,615 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:51:06,615 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:51:06,615 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 25 [2021-02-19 18:51:06,615 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140518958] [2021-02-19 18:51:06,616 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-02-19 18:51:06,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:51:06,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-02-19 18:51:06,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=568, Unknown=0, NotChecked=0, Total=650 [2021-02-19 18:51:06,616 INFO L87 Difference]: Start difference. First operand 13248 states and 34277 transitions. Second operand has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 25 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) [2021-02-19 18:51:07,415 WARN L202 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 18 [2021-02-19 18:51:07,909 WARN L202 SmtUtils]: Spent 310.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 33 [2021-02-19 18:51:08,224 WARN L202 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 23 [2021-02-19 18:51:08,653 WARN L202 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 25 [2021-02-19 18:51:09,119 WARN L202 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 29 Received shutdown request... [2021-02-19 18:51:09,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-02-19 18:51:09,885 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1165 [2021-02-19 18:51:09,885 WARN L545 AbstractCegarLoop]: Verification canceled [2021-02-19 18:51:09,887 WARN L224 ceAbstractionStarter]: Timeout [2021-02-19 18:51:09,888 INFO L202 PluginConnector]: Adding new model counter-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.02 06:51:09 BasicIcfg [2021-02-19 18:51:09,888 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-19 18:51:09,888 INFO L168 Benchmark]: Toolchain (without parser) took 537889.70 ms. Allocated memory was 255.9 MB in the beginning and 641.7 MB in the end (delta: 385.9 MB). Free memory was 236.3 MB in the beginning and 269.3 MB in the end (delta: -33.0 MB). Peak memory consumption was 353.6 MB. Max. memory is 16.0 GB. [2021-02-19 18:51:09,888 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.10 ms. Allocated memory is still 255.9 MB. Free memory was 237.4 MB in the beginning and 237.3 MB in the end (delta: 92.6 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-02-19 18:51:09,888 INFO L168 Benchmark]: Boogie Procedure Inliner took 23.21 ms. Allocated memory is still 255.9 MB. Free memory was 235.8 MB in the beginning and 234.3 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-02-19 18:51:09,888 INFO L168 Benchmark]: Boogie Preprocessor took 17.72 ms. Allocated memory is still 255.9 MB. Free memory was 234.3 MB in the beginning and 233.3 MB in the end (delta: 984.2 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-02-19 18:51:09,889 INFO L168 Benchmark]: RCFGBuilder took 215.43 ms. Allocated memory is still 255.9 MB. Free memory was 233.3 MB in the beginning and 238.0 MB in the end (delta: -4.7 MB). Peak memory consumption was 18.5 MB. Max. memory is 16.0 GB. [2021-02-19 18:51:09,889 INFO L168 Benchmark]: TraceAbstraction took 537622.08 ms. Allocated memory was 255.9 MB in the beginning and 641.7 MB in the end (delta: 385.9 MB). Free memory was 237.6 MB in the beginning and 269.3 MB in the end (delta: -31.7 MB). Peak memory consumption was 353.9 MB. Max. memory is 16.0 GB. [2021-02-19 18:51:09,889 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 0.10 ms. Allocated memory is still 255.9 MB. Free memory was 237.4 MB in the beginning and 237.3 MB in the end (delta: 92.6 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 23.21 ms. Allocated memory is still 255.9 MB. Free memory was 235.8 MB in the beginning and 234.3 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 17.72 ms. Allocated memory is still 255.9 MB. Free memory was 234.3 MB in the beginning and 233.3 MB in the end (delta: 984.2 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 215.43 ms. Allocated memory is still 255.9 MB. Free memory was 233.3 MB in the beginning and 238.0 MB in the end (delta: -4.7 MB). Peak memory consumption was 18.5 MB. Max. memory is 16.0 GB. * TraceAbstraction took 537622.08 ms. Allocated memory was 255.9 MB in the beginning and 641.7 MB in the end (delta: 385.9 MB). Free memory was 237.6 MB in the beginning and 269.3 MB in the end (delta: -31.7 MB). Peak memory consumption was 353.9 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 49]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 49). Cancelled while BasicCegarLoop was constructing difference of abstraction (13248states) and FLOYD_HOARE automaton (currently 17 states, 26 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 35 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 21 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 537.5s, OverallIterations: 121, TraceHistogramMax: 5, AutomataDifference: 382.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 3345 SDtfs, 23483 SDslu, 31690 SDs, 0 SdLazy, 67682 SolverSat, 6692 SolverUnsat, 2 SolverUnknown, 0 SolverNotchecked, 80.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 8207 GetRequests, 2197 SyntacticMatches, 189 SemanticMatches, 5820 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95979 ImplicationChecksByTransitivity, 330.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=13248occurred in iteration=120, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 5.3s AutomataMinimizationTime, 120 MinimizatonAttempts, 94714 StatesRemovedByMinimization, 120 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 1.3s SatisfiabilityAnalysisTime, 121.3s InterpolantComputationTime, 6614 NumberOfCodeBlocks, 6614 NumberOfCodeBlocksAsserted, 505 NumberOfCheckSat, 6376 ConstructedInterpolants, 276 QuantifiedInterpolants, 3021251 SizeOfPredicates, 407 NumberOfNonLiveVariables, 7371 ConjunctsInSsa, 2614 ConjunctsInUnsatCore, 238 InterpolantComputations, 4 PerfectInterpolantSequences, 1364/6281 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